Главная Manuals FM 4-20.105-1 Airdrop of Supplies and Equipment: Dual Row Airdrop Systems (Volume, August 2006)
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Rigging and Procedural Information
20-FOOT RISER EXTENSION
NYLON BAG
60-FOOT RISER EXTENSION
60-FOOT RISER EXTENSION
COTTON BAG
NYLON BAG
Figure 2-18. 20- and 60-Foot Riser Extensions Stowed
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2-21
Chapter 2
STOWING CARGO PARACHUTES
2-22. When referring to cargo parachutes, stowing consists of three steps. First, place the cargo parachutes
on the load or on a parachute stowage platform. Second, cluster the parachutes by tying their deployment
bags handles together. Third, group the bridles on a large clevis. Stow the parachutes as shown in Figures
2-19 through 2-22.
Note. Nylon and cotton bags may be mixed on the same load.
USING DEPLOYMENT LINES
2-23. The deployment line for DRAS loads is a 3-foot (4-loop), type XXVI nylon webbing sling. One end
of the deployment line is fitted on a 3 ¾-inch two-point link attached to the adapter web of the deployment
parachute. The other end of the line is fitted to the bolt of the large clevis grouping the bridles of a cluster
of parachutes.
RIGHT
LEFT
2
1
4
3
1 Set two parachutes side by side on the load with the riser compartments up and the bridles
toward the front of the platform.
2 Tie the inside front and rear cluster attaching loops (hereafter called carrying handles)
together with one turn single type III nylon cord.
3 Fit the bridle loops on the arms of a large clevis. Ensure the bolt of the clevis faces up.
4 For the nylon bag, tie the clevis to the right parachute restraint strap loop on the left
parachute with a length of doubled type I, ¼-inch cotton webbing. Secure with a surgeon’s
knot and a locking knot. For the cotton bag, tie the clevis to the right bridle attaching loop
with a length of one turn double type I, ¼-inch cotton webbing. Secure with a surgeon’s
knot and a locking knot.
Figure 2-19. Two Parachutes Stowed Side by Side
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Rigging and Procedural Information
1
RIGHT
LEFT
4
2
2
3
1
Stack two parachutes with the riser compartment of the bottom parachute down and the
riser compartment of the top parachute up.
2
Tie the outside front and rear cluster carrying handles together with one turn single type III
nylon cord.
3
Fit the bridle loops on the arms of a large clevis. Ensure the bolt of the clevis faces up.
4 For the nylon bag, tie the clevis to the top left parachute restraint strap loop with a length of
one turn double type I, ¼-inch cotton webbing. Secure with a surgeon’s knot and a locking
knot. For the cotton bag, tie the clevis to the right bridle attaching loop with a length of one
turn double type I, ¼-inch cotton webbing. Secure with a surgeon’s knot and a locking
knot.
Figure 2-20. Two Parachute Stacked
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2-23
Chapter 2
2
RIGHT
LEFT
3
5
4
1
1
1
Set two parachutes side by side on the load with the riser compartments down and the
bridles toward the front of the platform. Secure the center carrying handles with one turn
single type III nylon cord.
2
Center one parachute on top of the two parachutes in step 1 above with the riser
compartment up.
3
Tie the front and rear carrying handles together with one turn single of type III nylon cord.
4
Fit the bridle loops on the arms of a large clevis.
5 For the nylon bag, tie the clevis to the top left parachute restraint strap loop with a length of
one turn double type I, ¼-inch cotton webbing. Secure with a surgeon’s knot and a locking
knot. For the cotton bag, tie the clevis to the top right bridle attaching loop with a length of
one turn double type I, ¼-inch cotton webbing. Secure with a surgeon’s knot and a locking
knot.
Figure 2-21. Three Parachutes Stowed
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Rigging and Procedural Information
2
RIGHT
2
LEFT
3
5
3
3
4
1
1
1
Set two parachutes side by side on the load with the riser compartments down and with
bridles toward the front of the platform.
2
Set two parachutes side by side on top of the two parachutes in step 1 above with the riser
compartments up.
3
Tie the four center front and four center rear carrying handles together with one turn single
length of type III nylon cord. Tie the outside carrying handles together with one turn single
length of type III nylon cord.
4
Fit the bridle loops on the arms of a large clevis.
5 For the nylon bag, tie the clevis to the top left parachute’s right parachute restraint strap
loop with a length of one turn double type I, ¼-inch cotton webbing. Secure with a
surgeon’s knot and a locking knot. For the cotton bag, tie the clevis to the top right
parachute’s left bridle attaching loop with a length of one turn double type I, ¼-inch cotton
webbing. Secure with a surgeon’s knot and a locking knot.
Figure 2-22. Four Parachutes Stowed
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2-25
Chapter 2
RESTRAINING TWO TO FOUR PARACHUTES
2-24. The following parachute restraint systems are used to restrain two to four cargo parachutes.
• Two Parachutes. The restraint system for two cargo parachutes consists of two lengths of type
VIII nylon webbing (restraint straps) and two multicut parachute release straps for the stacked
configuration and one length of type VIII nylon webbing (restraint strap) and two multicut
parachute release straps for the side by side configuration as shown in Figures 2-23 through 2-26.
1
3
2
1
Tie a trucker’s hitch a suitable distance in each end of the restraint strap.
2
Run each free end of the strap through or around the indicated point on the load and back
up through the trucker’s hitch.
Note.
The indicated point for tying the parachute restraint strap to the load will be given in the
specific rigging chapter.
3 Pull on both ends of the restraint strap at the same time. When the strap is taut, tie the
ends with three alternating half hitches and an overhand knot in the running end.
Figure 2-23. Restraint Strap Tied
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Rigging and Procedural Information
2
3
1
1
Close the knife around the restraint strap, knurled nut out. Thread a length of type I, ¼-inch
cotton webbing through the safety tie hole. Even the ends of the webbing, and run them
under the restraint strap, and alongside the release knife.
2
Thread the end of the webbing on the left side of the knife rightward behind the bar of the
knife. Thread the other end of webbing left in a like manner.
3 Bring the ends of the webbing up over the top of the bar. Tie the ends of the webbing
together with a surgeon’s knot and a locking knot.
Figure 2-24. Guillotine Knife Safety Tied
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Chapter 2
Note. When a stowage platform is used, the restraint strap runs through the platform. Always use
multicut parachute release straps in pairs.
6
4
1
5
2
3
1
Run the restraint strap through the center carrying handles on the left side of the
parachutes, up to the top of the parachutes, and down through the center carrying handles
on the right side of the parachutes. Tie the ends of the restraint strap to the load as
described in Figure 2-23.
2
Run the second restraint strap through the front carrying handles of the left parachutes.
Run the restraint strap through the bridle attaching loops of the top parachute for the cotton
bags or through the parachute restraint strap loops for the nylon bag, and down through
the front carrying handles of the right parachutes. Tie the ends of the restraint strap to the
load as described in Figure 2-23.
3
Remove guillotine knives (Figure 1-1, number 7) from each multicut parachute release
strap. Fold the unused loops, and tape the folds in place.
4
Close each knife around the restraint strap, with the knurled nut out between the top and
bottom carrying handles. Safety tie the guillotine knife as shown in Figure 2-24.
5
Tie the free end of each release strap to the large clevis grouping the bridles. Use three
alternating half hitches and an overhand knot in each running end. Make sure that the
parachute release straps are not routed under the parachute restraint or parachute bridles.
Make sure that the release straps are as tight as possible to ensure that the deployment
force is applied to the strap before the bridles.
6 Fold or roll any excess strap, and tape the folds in place.
Figure 2-25. Multicut Parachute Release Straps Installed on Two Stack Parachutes
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Rigging and Procedural Information
Note. When a stowage platform is used, the restraint strap runs through the platform. Always use
multicut parachute release straps in pairs.
1
3
5
4
2
5
1
Run the restraint strap through the center carrying handle on the left side of the parachute.
Run the restraint strap over the top of the parachute, and down through the left center
carrying handle. Continue to run the restraint strap up through the right center inside
carrying handle. Run the restraint strap over the right parachute and down through the
right outside carrying handle. Tie the ends of the restraint strap to the load as described in
Figure 2-23.
2
Remove guillotine knife from each of two multicut parachute release straps. Fold the
unused loops, and tape the folds in place.
3
Close and safety tie the guillotine knives as shown in Figure 2-24.
4
Tie the free end of each release strap to the large clevis grouping the bridles. Use three
alternating half hitches and an overhand knot in each running end. Make sure that the
parachute release straps are not routed under the parachute restraint or parachute bridles.
Make sure that the release straps are as tight as possible to ensure that the deployment
force is applied to the strap before the bridles.
5 Fold or roll any excess strap, and tape the folds in place.
Figure 2-26. Multicut Parachute Release Straps Installed on Two Side-by-Side Parachutes
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Chapter 2
• Three and four parachutes. The restraint system for three and four cargo parachutes consists of
two lengths of type VIII nylon webbing (restraint straps) and two multicut parachute release
straps. Restrain three and four cargo parachutes as shown in Figures 2-27 and 2-28.
Note. When a stowage platform is used, the restraint strap runs through the platform. Always use
multicut parachute release straps in pairs.
1
4
3
5
2
1
Run the first restraint strap through the center carrying handles on the left side of the
parachutes. Run the restraint strap over the top of the parachute and down through the
right center carrying handles. Tie the ends of the restraint strap to the load as described in
Figure 2-23.
2
Run the second restraint strap through the outside front carrying handle of the bottom left
parachute, up through the top left front carrying handle and both bridle attaching loops of
the top parachute for the cotton bags or through the parachute restraint strap loops for the
nylon bag, and down through the outside front carrying handles of the top and bottom right
parachute. Tie the restraint strap to the load as described in Figure 2-23.
3
Remove guillotine knife from each of two multicut parachute release straps. Fold the
unused loops, and tape the folds in place.
4
Close and safety tie the guillotine knives as shown in Figure 2-24.
5 Tie the release straps to the large clevis as in step 4, Figure 2-26.
Note. Place the knives around the restraint straps between the carrying handles of the top and
bottom parachutes.
Figure 2-27. Three Parachutes Restrained and Multicut Parachute Release Strap Installed
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Rigging and Procedural Information
Note. When a stowage platform is used, the restraint strap runs through the platform. Always use
multicut parachute release straps in pairs.
1
4
5
3
2
1
Run the restraint strap through the center carrying handles on the left side of the
parachutes. Run the restraint strap over the top of the parachute, and down through the
left inside center carrying handle. Continue to run the restraint strap up through the right
inside center carrying handle. Run the restraint strap over the right parachute and down to
the right outside carrying handles. Tie the ends of the restraint strap to the load as
described in Figure 2-23.
2
Run the second restraint strap through the outside front carrying handles of the left
parachutes. Run the restraint strap through the bridle attaching loops of the top
parachutes for the cotton bags or through the parachute restraint strap loops for the nylon
bag, and down through the outside front carrying handles of the right parachutes. Tie the
ends of the restraint strap to the load as described in Figure 2-23.
3
Remove guillotine knife from each of two multicut parachute release straps. Fold the
unused loops, and tape the folds in place.
4
Close and safety tie the guillotine knives as shown in Figure 2-24.
5 Tie the release straps to the large clevis as in step 4, Figure 2-26.
Note. Place the knives around the restraint straps between the carrying handles of the top and
bottom parachutes.
Figure 2-28. Four Parachutes Restrained and Multicut Parachute Release Strap Installed
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Chapter 2
SECTION V - DEPLOYMENT LINE AND PARACHUTE
USE
2-25. A deployment parachute is used on every DRAS load to deploy the G-11D cargo parachutes as the
load leaves the aircraft. The deployment parachute is a
28-foot extraction parachute packed in a
deployment bag and rigged with a release-away static line assembly.
INSPECTING AND MAINTAINING
2-26. Deployment parachutes are inspected, maintained, and packed as outlined in TM 10-1670-277
23&P/TO 13C5-28-2. See the specific TM for more information on inspecting, maintaining, and packing
these parachutes. The 28-foot extraction parachute deployment bag modification procedures are located in
TM 10-1670-277-23&P. The release-away static line assembly is inspected and maintained as outlined in
TM 10-1670-277-23&P/TO 13C5-28-2.
ATTACHING THE DEPLOYMENT LINE
2-27. The 3-foot (4-loop), type XXVI nylon webbing sling is used as the deployment line for DRAS
airdrop and connects the deployment parachute to the cargo parachutes. Adapt the procedures as shown in
Figure 2-29 to connect the deployment line to the deployment parachute.
2
5
1
4
3
1
Place a spacer on each bolt of the 3 ¾-inch two-point link.
2
Fit the adapter web loop on one of the spacers attached in step 1 above.
3
Fit the loop of the 3-foot deployment line on the free spacer of the 3 ¾-inch two-point link.
4
Bolt the side plate to the 3 ¾-inch two-point link. Use a wrench to tighten the nuts. Run a
length of clothed-backed tape around the link and over each nut and bolt end.
5 Run a length of cloth-backed tape around the adapter web keeper.
Figure 2-29. Deployment Line Attached
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Rigging and Procedural Information
POSITIONING AND SECURING THE DEPLOYMENT PARACHUTE
AND LINE
2-28. Position and secure the deployment parachute as described below:
• On two stacked or three parachutes. Position and secure the deployment parachute on two
parachutes stacked or three parachutes as shown in Figure 2-30.
1
2
4
3
2
1
Position the deployment parachute centered on top of the G-11D cargo parachutes with
the apex to the front and the taped V-rings facing up.
2
Route the deployment line around the right side of the deployment parachute.
3
Safety tie the 3 ¾-inch two-point link to the right center carrying handle of the top G-11D
parachute with five lengths of type I ¼-inch cotton webbing.
4 Connect the other end of the deployment line to the bolt of the large clevis that groups the
cargo parachute bridles together.
Figure 2-30. Deployment Parachute and Line Positioned and Secured to Two Parachutes
Stacked or Three Parachute Load
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2-33
Chapter 2
5
5
7
6
5
Route a length of ¼-inch cotton webbing through each top clustering loop on the
deployment parachute deployment bag.
6
Tie the lengths of ¼-inch cotton webbing on the front clustering loops to the front carrying
handles on the top G-11D cargo parachutes.
7 Tie the lengths of ¼-inch cotton webbing on the rear clustering loops to the rear carrying
handles on the top G-11D cargo parachutes.
Figure 2-30. Deployment Parachute and Line Positioned and Secured to Two Parachutes
Stacked or Three Parachute Load (Continued)
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Rigging and Procedural Information
• On two side-by-side or four parachutes. Position and secure the deployment parachute on two
side-by-side parachutes or four parachutes as shown in Figure 2-31.
1
2
4
3
1
Position the deployment parachute centered on top of the G-11D cargo parachutes with
the apex to the front and the taped V-rings facing up.
2
Route the deployment line under the deployment parachute.
3
Safety tie the 3 ¾-inch two-point link to the center carrying handle of the G-11D parachute
with five lengths of type I ¼-inch cotton webbing.
4 Connect the other end of the deployment line to the bolt of the large clevis that groups the
cargo parachute bridles together.
Figure 2-31. Deployment Parachute and Line Positioned and Secured on Two Side-by-Side
Parachutes or Four Parachute Loads
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2-35
Chapter 2
5
6
7
6
5
Route a length of ¼-inch cotton webbing through each top clustering loop on the
deployment parachute deployment bag.
6
Tie the lengths of ¼-inch cotton webbing on the front clustering loops to the front outside
carrying handles on the G-11D cargo parachutes.
7 Tie the lengths of ¼-inch cotton webbing on the rear clustering loops to the rear outside
carrying handles on the G-11D cargo parachutes.
Figure 2-31. Deployment Parachute and Line Positioned and Secured on Two Side-by-Side
Parachutes or Four Parachute Loads (Continued)
SECTION VI - RELEASE ASSEMBLIES
USE
2-29. The cargo parachute release assembly separates the parachutes from the load when the load touches
the ground. The separation reduces the chance of the wind dragging or overturning the load.
DESCRIPTION
2-30. The M-1 release is used when a DRAS load is rigged for airdrop. This release is used with DRAS
rigged loads weighing up to 13,400 pounds suspended.
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Rigging and Procedural Information
INSPECTING AND MAINTAINING
2-31. The M-1 release is inspected and maintained as outlined in TM 10-1670-296-20&P/TO 13C7-49-2.
See the TM for specifics on inspection and maintenance.
OPERATION
2-32. The operation of the airdrop cargo parachute release is given below. The release works when the
load touches the ground and upper suspension link tilts or moves to the side. When the release tilts, the
parachutes are released from the load. Figure 2-32 shows how the release operates.
Note. The face plate has been removed to aid in identification.
1
2
3
4
6
5
1
As the cargo parachute deploys, the arming wire lanyard is pulled.
2
The safety tie is broken and the arming wire is pulled from the timer.
3
The timer delays from 12 to 16 seconds. This delay allows the load to stabilize itself under
the parachute.
4
When the timer winds down, it retracts its keys from the slots in the release.
5
When the keys are retracted from their slots, the timer is free to fall within the release.
6 As the timer falls, it frees the toggle and upper suspension link.
Figure 2-32. Typical Operation of the M-1 Cargo Parachute Release
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2-37
Chapter 2
7
8
7 When the load descends, the normal upright position of the M-1 release keeps the
parachute connectors in place. As the load touches the ground, the upper suspension link
tilts and allows the parachute connectors to pull free.
8 The released parachute stretches the dragline until the release drags to one side of the
load. Then the dragline breaks.
Figure 2-32. Typical Operation of the M-1 Cargo Parachute Release (Continued)
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Rigging and Procedural Information
PREPARING THE M-1 CARGO PARACHUTE RELEASE
2-33. Test, attach, and safety the M-1 cargo parachute release as follows:
• Testing timer. Before each use, seat, arm, and test the delay timer as shown in Figures 2-33
through 2-35.
1
2
1
Align and center the upper suspension link with the release side plates.
CAUTION
If the timer is not correctly seated in the upper position in the release
when it is armed, the keys will not fit into the slots in the back side
plate and could damage the timer.
2 Reach between the side plates, and slide the timer up until the toggles fit in the toggle lock
slides, making sure the timer slides freely. You should be able to see the winding shaft of
the timer through the guide block winder access hole.
Figure 2-33. Delay Release Timer Seated
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Chapter 2
1
2
1 Put the tip of a flat-tip screwdriver through the guide block winder access hole and into the
slot in the timer winding shaft. Gently turn the shaft one-quarter turn to the right and stop,
holding the shaft with the screwdriver.
Note. If the winding shaft is hard to turn, hold the shaft with the screwdriver and move the timer
around until the keys align with the slots in the back plate.
2 Hold the shaft, and push the arming wire down through the hole in the guide block and the
hole in the winding shaft.
Note. When the timer is correctly armed, about ½ inch of the arming wire can be seen through the
slot below the guide block winder access hole.
Figure 2-34. Timer Armed
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Rigging and Procedural Information
Note. A delay release timer will be tested before each use.
1
1 Pass a length of type I, ¼-inch cotton webbing up between the release side plates, over
and around the center of the timer, and back down between the side plates. The side plate
and a toggle lock slide have been removed to show how the webbing passes around the
timer. You may use a length of wire to help you pass the webbing around the timer.
Figure 2-35. Timer Tested
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2-41
Chapter 2
CAUTION
Do not over tighten the face side plate. Make sure the bolts are
tightened in an alternating sequence.
2
4
4
3
2
2 Hang the release in a straight, level position.
3 Tie a 10-ounce weight, such as a platform clevis with bolt or a parachute release
connector, without the nut and bolt, to the type I, ¼-inch cotton webbing.
4 Pull the arming wire from the timer. Count the seconds from the time the wire is pulled until
the timer falls within the release.
Note. If the timer fails to fall after the allotted time (12 to 16 seconds), remove the side plate and
check the four screws holding the arming wire guide block to the side plate for burrs. If the screw
heads are burred, remove the burrs by filing or replace the screws. Retest the timer. If there is a
second failure, remove and replace the timer.
Figure 2-35. Timer Tested (Continued)
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Rigging and Procedural Information
• Preparing, Attaching, and Safety Tieing Release. Prepare, attach, and safety tie the M-1 cargo
parachute release as shown in Figures 2-36 through 2-38.
NEW PARACHUTE CONNECTOR
OLD PARACHUTE CONNECTOR
ONE PIVOT POINTS
TWO PIVOT POINTS
PARACHUTE
4
CONNECTOR
2
3
1
Note. Do not mix the two types of connectors on the same release.
1
Use an M-1 release with a tested timer and make sure that the delay release timer is down
in the housing of the release.
2
Move the upper suspension link to the right or the left as far as it will go.
3
Open the arms of a parachute connector, and fit the arms on the upper suspension link
with the tips together in the groove of the retaining clamp.
Note.
One parachute connector will be fitted to the upper suspension link for each cargo
parachute used on the load.
4 If needed, fit a retainer band around the parachute connector to aid in assembly.
Figure 2-36. Parachute Connector Fitted to Upper Suspension Link of M-1 Release
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Chapter 2
3
2
1
4
1
Move the upper suspension link back to the center of the release and arm the timer as
indicated in Figures 2-35 and 2-36.
2
Safety tie the arming wire lanyard to the upper suspension link with a double length of type
I, ¼-inch cotton webbing with a surgeon’s knot and a locking knot.
CAUTION
The end loop of the arming wire may pull free from the crimping
sleeve during parachute deployment. To ensure that the arming wire
disengages from the timer stem, an arming wire safety tie must be
installed on all arming wires prior to use on an airdrop operation.
Note. With the arming wire lanyard attached to the arming wire loop, the arming wire loop shall be
designated as the top. Install the safety tie as follows:
Note.
This safety tie should be inspected at the joint airdrop load inspection, before and after
loading.
3
Girth hitch a 12-inch length of ¼-inch cotton webbing on the safety wire just below the
metal fastener.
4 Route one running end of the ¼-inch cotton webbing through the looped ends of the
arming wire and lanyard. After ensuring there is ½ inch to 1 inch of slack in both running
ends, tie a surgeon’s knot and locking knot in the ¼-inch cotton webbing.
Figure 2-37. M-1 Release Prepared
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Rigging and Procedural Information
8
5
9
6
7
5
Fold the slack in the lanyard, and tape the folds in place with one turn of masking tape.
6
Fold the slack in the lanyard, between the safety tie and the arming wire, and tape the fold
to the face side plate with one piece of masking tape.
Note. Include the following data on the masking tape: name, date, and timer seconds.
7
Tie one end of a 5-foot length of type III nylon cord (dragline) to one side of the lower
suspension link.
8
Tie the other end of the dragline to a parachute connector.
9 Fold the slack in the dragline and tape the folds in place with one turn of masking tape.
Figure 2-37. M-1 Release Prepared (Continued)
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Chapter 2
CAUTION
Place the release on the load with the parachute connectors toward
the front of the platform and with the guide block up. Bolt the
suspension slings to the lower suspension links so that they will not
change position when the load is suspended. Make sure the arming
wire lanyard is routed over all items.
2
4
4
1
3
3
1
Put the release on the load as instructed in the specific rigging chapter for the load.
2
Bolt the riser extensions of the G-11D cargo parachutes to the parachute connectors
already fitted to the release.
3
Attach the front suspension slings to the lower bolts of the lower suspension link. The front
slings will have a half twist towards the parachutes.
4 Attach the rear suspension slings to the top bolts of the lower suspension link.
Notes:
1. The keeper at each end of the sling must be drawn snugly against the object on which the sling
is fitted.
2. Suspension slings on DRAS loads will have the nylon buffers removed to fit on the lower
suspension links of the M-1 parachute release assembly.
Figure 2-38. M-1 Release Attached and Safetied to Load
2-46
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Rigging and Procedural Information
6
8
5
5
Run a length of type III nylon cord to encircle the lower spacer, and tie the ends of the cord
to points on the rear of the load or platform.
6
Run a length of type III nylon cord through the parachute connectors, and tie the ends of
the cord to points on the front of the load or platform.
7
Tie the lanyard to a carrying handle of a parachute with three alternating half hitches and
an overhand knot in the running end (not shown).
8 Fold the slack in the lanyard, and tape the folds in place with one turn of masking tape.
Figure 2-38. M-1 Release Attached and Safetied to Load (Continued)
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2-47
Chapter 2
ATTACHING PARACHUTE RISERS TO THE PARACHUTE RELEASE
2-34. Lay the parachute release on top of the load with the bolt end of the parachute connectors toward the
cargo parachutes. Bolt the parachute riser extensions to the parachute connectors of the M-1 parachute
release as shown in Figure 2-39.
Note. Bolt the parachute riser extensions to the parachute connectors from rigger’s left to right.
They must be in the numerical order given for four parachute loads.
FRONT OF PLATFORM
CARGO PARACHUTES
2
2
4
1
3
1
3
PARACHUTE RISER
EXTENSIONS
2
3
1
2
3
4
1
PARACHUTE
CONNECTORS
REAR OF PLATFORM
Figure 2-39. Three and Four Parachute Riser Extensions Attached to the Parachute
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Rigging and Procedural Information
SECTION VII - ATTITUDE CONTROL SYSTEMS
ATTITUDE CONTROL SYSTEM
2-35. Assemble and inspect two attitude control systems for each load as follows:
• Assembling the ACS. Assemble the ACS as shown in Figure 2-40.
Note. Drawing not to scale. All dimensions are given in inches.
3 ½
2 x 4 x 86
LUMBER
1
2
4 x 4 x 94
LUMBER
2 x 8 x 86
LUMBER
1 Place a 2- by 4- by 86-inch piece of lumber flush along the rear edge of a 2- by 8- by 86
inch piece of lumber and nail at 6 inch intervals using 16d nails.
2 Center a 4- by 4- by 94-inch piece of lumber on the 2- by 8- by 86-inch lumber, 3 ½-inches
from the 2- by 4- by 86-inch lumber. Nail at 6 inch intervals using 16d nails.
Note. The 4- by 4- by 94-inch lumber should over hang each end of the 2- by 8- by 86-inch lumber
by 4 inches.
Figure 2-40. Attitude Control System Assembled
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2-49
Chapter 2
3
4 x 4 x 94
LUMBER
2 x 8 x 86
LUMBER
9
2 x 4 x 86-
6
LUMBER
7
5
4
3 Fold a 16-foot (2-loop), type XXVI nylon sling in half. Place both ends on the bolt of a
medium or large clevis.
4 Place the bolt of a second medium or large clevis through the fold of the sling.
5 Center the folded sling and clevises in the trough of the ACS with the clevises extending
from each end.
6 Place a 2- by 8- by 86-inch piece of lumber flush along the rear edge of the 2- by 4- by 86
inch piece of lumber. Nail the lumber at 6 inch intervals along both sides using 16d nails.
Note. Ensure NO nails are protruding through the inside of the ACS.
7 Route two CGU-1/B tiedown straps or two A7A cargo straps around the ACS 4 inches from
each end.
8 Pad the CGU-1/B tiedown straps or A7A cargo straps with felt and secure the felt with
cloth-backed tape (not shown).
9 Mark the center of the ACS so it is visible from the ground.
Figure 2-40. Attitude Control System Assembled (Continued)
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Rigging and Procedural Information
• Inspecting the ACS. Inspect the ACS for the following items:
■ Lumber. Inspect the lumber for splits or excess damage. If the damage interferes with the
proper functioning of the ACS, discard and use a new ACS.
■ Slings. Inspect the slings according to TM 10-1670-296-20&P/TO 13C7-49-2. Ensure the
slings move freely through the ACS.
■ Clevises. Inspect the clevises according to TM 10-1670-296-20&P/TO 13C7-49-2.
■ Serviceable slings and clevises may be used on another ACS.
SECTION VIII - OUTRIGGER ASSEMBLY
USE
2-36. An outrigger assembly is used on every DRAS load to help prevent the load from turning over after
landing on the ground. The assembly is attached to the DRAS platform and is deployed from the vertical
to the horizontal position after the load clears the ramp of the aircraft. The component parts of the
outrigger assembly are shown in Figure 2-41.
INSPECTING AND MAINTAINING
2-37. Outriggers are inspected and maintained as outlined in TM 10-1670-268-20&P/TO 13C7-52-22. See
the specific TM for more information on inspecting and maintaining the outrigger assembly.
1
6
6
2
5
3
Note. The outrigger foot may be rectangular or round.
4
1 Outrigger mast.
2 Mast pivot pin.
3 Outrigger foot.
4 Platform fitting assembly weldment.
5
Platform fitting assembly link.
6 Ball lock pin.
Figure 2-41. Deployable Outrigger Assembly
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Chapter 2
PLATFORM FITTING ASSEMBLY (PFA) WELDMENT AND LINK
ASSEMBLIES
2-38. The PFA weldment and the link assembly are designed to be installed on either platform side rail.
Assemble and install the PFA weldment and the link assembly on the DRAS platform according to TM 10
1670-268-20&P/TO13C7-52-22.
OUTRIGGER MAST AND FOOT
2-39. The outrigger mast and foot are interchangeable and may be used on either side of the platform.
Assemble, install, and safety the mast and foot on the DRAS platform according to TM 10-1670-268
20&P/TO13C7-52-22 and as shown in Figures 2-42 through 2-45.
1
2
3
1
Place the mast in the PFA weldment in the horizontal position aligning the shaft hole in the
mast with the sleeve bearings in the PFA weldment.
2
Insert the mast pivot pin through the bearing and the mast from rear to front.
3 Looking inside the bottom of the mast, align the hole in the mast pivot pin with the hole in
the mast and insert the ball-lock pin.
Figure 2-42. Mast Installed
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Rigging and Procedural Information
4
2
1
3
1
Place the foot at the end of the mast aligning the pivot pin hole in the mast with the sleeve
bearings in the foot.
2
Insert the pivot pin through the bearing and the mast from rear to front.
3
Looking inside the end of the mast, align the hole in the mast pivot pin with the hole in the
mast and insert the ball-lock pin.
4
Tape the eyebolts with cloth-backed tape leaving the eyes open.
5
Repeat steps 1 through 4 on the opposite side.
Figure 2-43. Foot Installed
Note. This safety tie is not required for the round outrigger foot.
1
1 Place a length of type VIII nylon webbing between the eyebolts on the mast. Run
the ends through the inside holes of the foot. Secure the ends together, with a trucker’s
hitch knot, on top of the mast. Repeat on the opposite side.
Figure 2-44. Foot Safety Tied
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Chapter 2
1
2
3
1
1 Raise both outriggers to the vertical position and route a CGU-1B tiedown assembly
around both masts.
Note. The CGU-1B tiedown assembly must be removed during after loading inspection.
2 Form an outrigger vertical restraint tie by routing a length of ½-inch tubular nylon webbing
through the top eyebolt on both masts. Tie the ends together 6 inches from the right mast
eyebolt using a trucker’s hitch.
3 Form a second outrigger vertical restraint tie by routing a length of ½-inch tubular nylon
webbing through the bottom eyebolt on both masts. Tie the ends together 6 inches from
the left mast eyebolt using a trucker’s hitch.
Figure 2-45. Mast Safety Tied
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Rigging and Procedural Information
4
5
10
9
8
7
6
4
Install and safety tie a guillotine knife around each outrigger vertical restraint tie as shown
in Figure 2-24. Ensure the knives are installed against the knots.
5
Tie a length of ½-inch tubular nylon webbing to the body of each guillotine knife with a
surgeon’s knot and locking knot with a knot in the running end. The length of the webbing
is given in the specific chapter for the item being rigged.
6
Tie the webbing from the right guillotine knife to the top of the right lower suspension link of
the M-1 parachute release assembly with three alternating half hitches and an overhand
knot. Tape the running end to the ½-inch tubular nylon webbing.
7
Repeat step 6 using the left guillotine release knife and the top of the left lower suspension
link.
8
Tie the lower suspension links together as close as possible with one turn single, type I ¼
inch cotton webbing. Ensure the tie is under the ½-inch tubular nylon webbing ties.
9
Tie a length of type III nylon cord to the left point indicated in the specific rigging chapter.
Tie the other end of the type III nylon cord to the body of the top guillotine knife. The
length of the cord is given in the specific chapter for the item being rigged. S-fold the slack
in the type III nylon cord and secure with masking tape.
10
Repeat step 9 using the right point indicated in the specific rigging chapter and the bottom
guillotine knife.
Figure 2-45. Mast Safety Tied (Continued)
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Chapter 2
SECTION IX - LOAD MARKING AND INSPECTION
MARKING RIGGED LOAD
2-40. Each rigged load must have a data tag prepared for it, and some rigged loads may require a Shipper’s
Declaration for Dangerous Goods. The center of balance must also be clearly marked on both sides of the
platform.
• Data Tag. A data tag is prepared and secured on the rear of each platform load. Entries on the
tag are used by the Army and Air Force in making inspections and in finding causes for
malfunctions. The entries are also used to help the loadmaster determine where to place the load
in the aircraft. Use a ballpoint pen or other waterproof marking device to record the following
information on the tag:
■ Total rigged weight.
■ Height, including parachutes.
■ Width.
■ Overall length.
■ Overhang (specify front, rear, or side of load).
■ Longitudinal center of balance (measured from the front edge of the platform).
• Shipper’s Declaration for Dangerous Goods. This form is prepared and secured on each load
that has any type of hazardous material such as fuel, ammunition, or a battery.
• Center of Balance. In addition to being included on the data tag, the longitudinal center of
balance must also be marked on the platform. The vertical line of the symbol CB is placed at the
center of balance on both sides of the platform.
SECTION X - TRANSPORTATION OF RIGGED LOADS
RESPONSIBILITIES
2-41. The using unit is responsible for coordinating transportation of the rigged load from the rigging site
to the aircraft. To prevent damage, loads must be lashed to the transporting vehicle and protected during
transport. The transporting force must ensure that the off-loading equipment is compatible with the aircraft
to be used.
TYPICAL LOADING AND TRANSPORTING EQUIPMENT
2-42. Some of the equipment that may be used to load and transport rigged loads is listed below.
• Materials-Handling Equipment. If a loading ramp is not available to use in loading the rigged
load onto the transporting vehicle, the load is hoisted aboard the vehicle. The materials-handling
equipment used to hoist the loads may include but are not limited to the 5-ton wrecker, the
10,000- or 15,000-pound-capacity warehouse crane, or the 10,000- or 15,000-pound-capacity
forklift truck.
• Transporting Vehicle. Any standard military truck or semi-trailer with sufficient cargo space
and payload capacity can be modified to transport a rigged load from the loading area to the cargo
aircraft. However, not all military trucks are compatible with the cargo-loading system of all
types of cargo aircraft now in use. Rigged platform loads require straight-in loading over a
horizontally positioned ramp from a truck, a forklift, a flatbed, or a cargo loader. Consequently,
this may require transfer of the rigged load at the aircraft site before it is off-loaded into the cargo
aircraft. The following types of materials-handling equipment can be used to transport and/or off-
load platform loads:
■ The 6- or 10-ton cargo semitrailer can transport loads rigged on airdrop platforms.
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Rigging and Procedural Information
■ The 25,000-pound-capacity cargo loader can move the maximum weight of 25,000 pounds
up a 3-percent incline at 15 miles per hour. It can be used for loading all aircraft.
■ The 40,000-pound-capacity cargo loader can move the maximum weight of 40,000 pounds
up a 3-percent incline at 15 miles per hour.
■ The 60,000-pound-capacity cargo loader (the Tunner) can move the maximum weight of
60,000 pounds up a 3-percent incline at 15 miles per hour.
Notes.
1. The DRAS platform must be loaded centerline on the 25,000- and 60,000-pound capacity
loaders.
2. The 40,000-pound capacity loader requires the right side loads to be against the loader’s right
side rails and left side loads must be against the loader’s left side rails.
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Chapter 3
Rigging M998/M1038/M1097 Cargo/Troop Carrier HMMWV
on Dual Row Airdrop System Platform
SECTION I - RIGGING THE M998/M1038/M1097 CARGO/TROOP CARRIER
DESCRIPTION OF LOAD
3-1. The HMMWV truck is rigged on a DRAS platform for DRAS airdrop. An accompanying load
weighing a minimum of 800 pounds and a maximum of 2,000 pounds must be rigged in the truck. The load
is rigged with three G-11D cargo parachutes.
• The M998 Cargo/Troop Carrier (Figure 3-1). It weighs 5,200 pounds. It is 180 inches long and 85
inches wide. The reduced height of the vehicle is 54 inches.
• The M998A1 Cargo/Troop Carrier. It weighs 5,380 pounds. It is 180 inches long and 86 inches
wide. The reduced height of the vehicle is 56 inches.
• The M1038 Cargo/ Troop Carrier with winch. It weighs 5,327 pounds. It is 180 inches long and
86 inches wide. The reduced height of the vehicle is 54 inches.
• The M1038A1 Cargo/Troop Carrier with winch. It weighs 5,507 pounds. It is 186 inches long
and 86 inches wide. The reduced height of the vehicle is 56 inches.
• The M1097 Cargo/Troop Carrier. It weighs 5,600 pounds. It is 180 inches long and 85 inches
wide. The reduced height of the vehicle is 54 inches.
Figure 3-1. M998/M1038/M1097 Cargo/Troop Carrier HMMWV
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Chapter 3
PREPARING PLATFORM
3-2. Inspect, or assemble and inspect, a DRAS platform with outrigger assemblies and outrigger platform
support weldments and link assemblies according to TM 10-1670-268-20&P/TO 13C7-52-22 and as
shown in Figure 3-2.
CLEVISES
17A THROUGH 1 A
LEFT
REAR
FRONT
RIGHT
CLEVISES
17 THROUGH 1
Step:
1. Starting at the front of each platform side rail, install clevises on the bushings bolted on
holes 1 (triple), 2, 5, 7, 9, 10, 13 (double-invert bottom clevis on right side of platform), 15,
16, 18, 25, 27, 28, 29, and 30.
2. Starting at the front of the platform, number the clevises 1 through 17 on the right side and
1A through 17A on the left side.
3. Label the tie-down rings according to Figure 2-2.
Note. The clevis attached to the 13th bushing is clevis number 10 and the doubled clevis is
number 11.
Figure 3-2. Platform Prepared
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Rigging M998/M1038/M1097 Cargo/Troop Carrier HMMWV on Dual Row Airdrop System Platform
BUILDING AND PLACING HONEYCOMB STACK
3-3. Prepare the honeycomb stacks for the trucks as shown in Figure 3-3. Position the honeycomb stacks
as shown in Figure 3-4.
Stack
Pieces
Width
Length
Material
Instructions
Number
(inches)
(inches)
1 and 3
1
24
80
Honeycomb
This is the base.
3
24
54
Honeycomb
Center and glue together and glue to
base.
1
24
54
¾-inch
Center and glue to top of 24-inch by
Plywood
54-inch honeycomb.
1
24
54
Honeycomb
Center and glue to top of 24-inch by
54-inch plywood.
2
24
20
Honeycomb
Center and glue to top of 24-inch by
54-inch honeycomb.
1
24
20
¾-inch
Center and glue to top of 24-inch by
Plywood
20-inch honeycomb.
1
24
20
Honeycomb
Center and glue to top of 24-inch by
20-inch plywood.
Figure 3-3. Honeycomb Stacks Prepared
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3-3
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