FM 4-20.119 Airdrop of Supplies and Equipment: Rigging 105-Millimeter Howitzers (MAY 2006) - page 8

 

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FM 4-20.119 Airdrop of Supplies and Equipment: Rigging 105-Millimeter Howitzers (MAY 2006) - page 8

 

 

Rigging M101A1 Howitzer for Low-Velocity Airdrop on Type V Platform
STOWING ACCOMPANYING LOAD
CAUTION
Only ammunition listed in FM
4-20.153/TO
13C7-18-41 may be
airdropped.
6-4. Stow the accompanying load of 21 boxes of ammunition weighing 2,100 pounds as shown in Figures
6-4 and 6-5.
NOTICE OF EXCEPTION
Exception to FM
4-20.102/MCRP
4-11.3J/NAVSEA SS400-AB-
MMO-010/TO 13C7-1-5 is granted to rig ammunition with one layer
of honeycomb.
2
4
1
3
1 Place an 84- by 36-inch piece of honeycomb centered and 1 inch in front of honeycomb
stack 2.
2 Center two 15-foot lashings 7 inches from each end of the honeycomb positioned in step
1.
3 Center five boxes of ammunition over the lashings.
4 Secure the lashings over the boxes with a D-ring and load binder.
Figure 6-4. First Stack of Ammunition Positioned
10 May 2006
FM 4-20.119/TO 13C7-10-31
6-5
Chapter 6
5
6
7
8
6
5
7
8
5 Route a 15-foot lashing through clevis 5 and through its own D-ring. Route a 15-foot
lashing through clevis 5A and through its own D-ring. Secure the lashings on top of the
boxes with two D-rings and a load binder.
6 Route a 15-foot lashing through clevis 8 and through its own D-ring. Route a 15-foot
lashing through clevis 8A and through its own D-ring. Secure the lashings on top of the
boxes with two D-rings and a load binder.
7 Route a 15-foot lashing through clevis 6A and through its own D-ring. Route the lashing
through the box handles on the front side of the boxes. Route a 15-foot lashing through
clevis 6 and through its own D-ring. Secure the two lashings on the right side as shown
with two D-rings and a load binder.
8 Route a 15-foot lashing through clevis 7A and through its own D-ring. Route the lashing
through the box handles on the front side of the boxes. Route a 15-foot lashing through
clevis 7 and through its own D-ring. Secure the two lashings on the right side as shown
with two D-rings and a load binder.
Figure 6-4. First Stack of Ammunition Positioned (Continued)
6-6
FM 4-20.119/TO 13C7-10-31
10 May 2006
Rigging M101A1 Howitzer for Low-Velocity Airdrop on Type V Platform
3
1
2
2
1
1 Pre-position four 15-foot lashings on honeycomb stack 2, 4 inches from each end of the
stack. Place the sewn D-rings 3 inches apart at the top center of the stack.
2 Place eight ammunition boxes on each side of honeycomb stack 2. Place the boxes ½
inch from the front edge of the honeycomb.
3 Secure the pre-positioned lashings on top of the boxes.
Figure 6-5. Ammunition Boxes Positioned on Honeycomb Stack 2
10 May 2006
FM 4-20.119/TO 13C7-10-31
6-7
Chapter 6
PREPARING HOWITZER
6-5. Prepare the howitzer as shown in Figure 6-6.
6
7
5
4
1
3
2
1 Secure the gun trails together. Safety tie the clamp shut with type III nylon cord.
2 Secure the trail lock pins in place with type III nylon cord.
3 Place the aiming poles in the holders provided. Secure the poles in place with type III
nylon cord. Secure the cleaning staffs on the left trail in the same way.
4 Place the handling bar in its mounts on top of the left trail. Secure the bar in place with
type III nylon cord.
5 Place a 29- by 14-inch piece of honeycomb across the trails 6 inches behind the recoil
slide. Place the section chest on the honeycomb. Pass a 15-foot lashing under the trails
and up through the chest carrying handles. Pad the lashing where it touches the trails and
the chest corners. Secure the lashing on top of the chest.
6 Pad the sight mounts and quadrant with cellulose wadding taped in place.
7 Tie the breech operating handle shut with type III nylon cord.
Figure 6-6. Howitzer Prepared
6-8
FM 4-20.119/TO 13C7-10-31
10 May 2006
Rigging M101A1 Howitzer for Low-Velocity Airdrop on Type V Platform
9
10
11
12
8
13
8 Latch the lower deflector shield down and safety tie the latches with type III nylon cord.
9 Pad the muzzle with cellulose wadding taped in place.
10 Pad the upper edges of the deflector shields with cellulose wadding taped in place.
11 Pad the sights with cellulose wadding and place them in the sight box. Latch and safety tie
the sight box securely shut.
12 Tie the folded gun cover in place between the deflector shields.
13 Place the howitzer brake in the lock position. Secure the brake lever with type III nylon
cord.
Figure 6-6. Howitzer Prepared (Continued)
10 May 2006
FM 4-20.119/TO 13C7-10-31
6-9
Chapter 6
PLACING HOWITZER ON PLATFORM
6-6. Place the howitzer on the honeycomb stacks as shown in Figure 6-7.
1
2
16
52
1 Set the howitzer on the stacks so that the center line between the wheels is 52 inches from
the front edge of the platform.
2 Allow the towing pintle to overhang the rear edge of the platform 16 inches.
Figure 6-7. Howitzer Positioned on Platform
6-10
FM 4-20.119/TO 13C7-10-31
10 May 2006
Rigging M101A1 Howitzer for Low-Velocity Airdrop on Type V Platform
CONSTRUCTING ENDBOARD AND LASHING REAR AMMUNITION
STACK TO PLATFORM
6-7. Construct the endboards and place them on the load as shown in Figure 6-8. Lash the ammunition
placed on honeycomb stack 2 to the platform as shown in Figure 6-9.
Notes. 1. All measurements are given in inches.
2. These drawings are not drawn to scale.
3. Cutouts 2 inches wide and 3 inches deep may be substituted for the nailed cleats
shown.
4. Use 8d nails.
28
28
28
3
24
1
32
2
18
9
84
25
25
3
16
1
2
32
18
9
20
1 Center cutouts as shown in two ¾- by 84- by 32-inch pieces of plywood.
2 Make and nail 2- by 4- by 6-inch cleats to both sides of each endboard as shown.
Figure 6-8. Ammunition Stowed and Lashed on Platform
10 May 2006
FM 4-20.119/TO 13C7-10-31
6-11
Chapter 6
5
6
5
3
4
12
12
17
3 Place the endboard with the wider cutout between the ammunition stacks with the cleats
facing the front of platform.
4 Place the rear endboard against the ammunition stack with the cleats facing the rear of the
platform.
5 Route a 15-foot lashing through clevis 12 and through its own D-ring. Route a 15-foot
lashing through clevis 12A and through its own D-ring. Secure the lashing over the right
side of the stack with two D-rings and a load binder.
6 Route a 15-foot lashing through clevis 17 and through its own D-ring. Route a 15-foot
lashing through clevis 17A and through its own D-ring. Secure the lashing over the right
side of the stack with two D-rings and a load binder.
Figure 6-8. Ammunition Stowed and Lashed on Platform (Continued)
6-12
FM 4-20.119/TO 13C7-10-31
10 May 2006
Rigging M101A1 Howitzer for Low-Velocity Airdrop on Type V Platform
11
10
12
9
11
8
16
15
14
13
7
10
7
Route a 15-foot lashing through clevis 13 and through its own D-ring. Route a second
15-foot lashing through clevis 13A and through its own D-ring. Pass both lashings over the
lower cleats on the front endboard and secure them together with two D-rings and a load
binder.
8
Route a 15-foot lashing through clevis 15 and through its own D-ring. Route a second
15-foot lashing through clevis 15A and through its own D-ring. Pass both lashings over the
lower cleats on the rear endboard and secure them together with two D-rings and a load
binder.
9
Route a 15-foot lashing through clevis 14 and through its own D-ring. Route a second
15-foot lashing through clevis 14A and through its own D-ring. Pass both lashings over the
center cleats on the front endboard and secure them together with two D-rings and a load
binder.
10
Route a 15-foot lashing through clevis 11 and through its own D-ring. Route a second
15-foot lashing through clevis 11A and through its own D-ring. Pass both lashings over the
center cleats on the rear endboard and secure them together with two D-rings and a load
binder.
11
Route a 15-foot lashing through clevis 16 and through its own D-ring. Route a second
15-foot lashing through clevis 16A and through its own D-ring. Pass both lashings over the
top cleats on the front endboard and secure them together with two D-rings and a load
binder.
12
Route a 15-foot lashing through clevis 10 and through its own D-ring. Route a second
15-foot lashing through clevis 10A and through its own D-ring. Pass both lashings over the
top cleats on the rear endboard and secure them together with two D-rings and a load
binder.
Figure 6-8. Ammunition Stowed and Lashed on Platform (Continued)
10 May 2006
FM 4-20.119/TO 13C7-10-31
6-13
Chapter 6
LASHING HOWITZER
6-8. Lash the howitzer to the platform as shown in Figures 6-9 and 6-10.
2
1
3
4
2A
1A
2
1
Lashing
Tiedown
Instructions
Number
Clevis
Number
Pass lashing:
1
1
Around cradle.
2
1A
Around cradle.
3
2
Around towing hook.
4
2A
Around towing hook.
Figure 6-9. Lashings 1 Through 4 Installed
6-14
FM 4-20.119/TO 13C7-10-31
10 May 2006
Rigging M101A1 Howitzer for Low-Velocity Airdrop on Type V Platform
9
5
7
7
9
4
3
9
11
4
9
18
Lashing Number
Tiedown Clevis
Instructions
Number
Pass Lashing:
5
3
Around right trail and around rear of traveling lock bracket.
6
3A
Around left trail and around rear of traveling lock bracket.
7
4
Around trail locking arm.
8
4A
Around trail locking arm.
9
9
Around right trail and around front side of traveling lock
bracket.
10
9A
Around left trail and around front side of traveling lock
bracket.
11
18
Through towing pintle.
12
18A
Through towing pintle.
Figure 6-10. Lashings 5 though 12 Installed
10 May 2006
FM 4-20.119/TO 13C7-10-31
6-15
Chapter 6
INSTALLING SUSPENSION SLINGS
6-9. Install the suspension slings, the deadman’s tie and safety tie the slings as shown in Figure 6-11.
2
3
1
1 Pass a 3-foot (2-loop), type XXVI nylon webbing sling through an end loop of a 12-foot (2-
loop), type XXVI nylon webbing sling. Place both loops of the 3-foot sling in the bell
portion of a large suspension clevis. Bolt the large clevis to the suspension hole of one of
the tandem links. Repeat for the other three suspension slings.
2 Raise the suspension slings and install the deadman’s tie according to FM 4-
20.102/MCRP 4-11.3J/NAVSEA SS400-AB-MMO-010/TO 13C7-1-5.
3 Pad each front suspension sling with a 8- by 32-inch piece of felt padding beginning 30
inches from the lower end loop of the 12-foot sling. Tape the felt in place.
Figure 6-11. Suspension Slings and Deadman’s Tie Installed
6-16
FM 4-20.119/TO 13C7-10-31
10 May 2006
Rigging M101A1 Howitzer for Low-Velocity Airdrop on Type V Platform
CAUTION
Each front suspension sling must be securely tied to the deflector
shield with type III nylon cord.
4
4 Safety tie the front suspension slings to the deflector shield with type III nylon cord.
Figure 6-11. Suspension Slings and Deadman’s Tie Installed (Continued)
10 May 2006
FM 4-20.119/TO 13C7-10-31
6-17
Chapter 6
STOWING CARGO PARACHUTES
6-10. Stow the G-11 cargo parachutes according to FM 4-20.102/MCRP 4-11.3J/NAVSEA SS400-AB-
MMO-010/TO 13C7-1-5 and as shown in Figure 6-12.
3
1
2
4
14
1 Center a 36- by 36-inch piece of honeycomb over the howitzer trails between the stacks of
ammunition boxes.
2 Tape the edges of an 84- by 36-inch piece of honeycomb and tie it over honeycomb stack
2 with type III nylon cord.
3 Prepare and install two G-11 cargo parachutes according to FM 4-20.102/MCRP 4-
11.3J/NAVSEA SS400-AB-MMO-010/TO 13C7-1-5.
4 Restrain the parachutes to clevises 14 and 14A according to FM 4-20.102/MCRP 4-
11.3J/NAVSEA SS400-AB-MMO-010/TO 13C7-1-5.
Figure 6-12. Cargo Parachutes Stowed
6-18
FM 4-20.119/TO 13C7-10-31
10 May 2006
Rigging M101A1 Howitzer for Low-Velocity Airdrop on Type V Platform
INSTALLING EXTRACTION SYSTEM
6-11. Install the EFTC extraction system on the load according to FM 4-20.102/MCRP 4-11.3J/NAVSEA
SS400-AB-MMO-010/TO 13C7-1-5 and as shown in Figure 6-13. If applicable install the EPJS according
to FM 4-20.102/MCRP 4-11.3J/NAVSEA SS400-AB-MMO-010/TO 13C7-1-5.
4
2
5
1
3
4
1 Install the EFTC mounting brackets to the rear set of holes on the left platform side rail.
2 Install the actuator according to FM 4-20.102/MCRP 4-11.3J/NAVSEA SS400-AB-MMO-
010/TO 13C7-1-5.
3 Install the latch assembly and latch assembly adapter to the extraction bracket according to
FM 4-20.102/MCRP 4-11.3J/NAVSEA SS400-AB-MMO-010/TO 13C7-1-5.
4 Install a 16-foot cable and safety tie according to FM 4-20.102/MCRP 4-11.3J/NAVSEA
SS400-AB-MMO-010/TO 13C7-1-5.
5 Install a 9-foot (2-loop), type XXVI nylon webbing deployment line. S-fold the slack and tie
the folds with type I, ¼-inch cotton webbing.
Figure 6-13. EFTC Installed
10 May 2006
FM 4-20.119/TO 13C7-10-31
6-19
Chapter 6
INSTALLING RELEASE SYSTEM
6-12. Prepare and install an M-1 cargo parachute release according to FM
4-20.102/MCRP
4-
11.3J/NAVSEA SS400-AB-MMO-010/TO 13C7-1-5 and as shown in Figure 6-14.
4
2
3
5
1
1 Cover the howitzer from the front deflector shield to 6 inches behind the section chest with
a full sheet of honeycomb. Tape and tie the honeycomb to convenient points on the load
with type III nylon cord.
2 Prepare and install an M-1 cargo parachute release according to FM 4-20.102/MCRP 4-
11.3J/NAVSEA SS400-AB-MMO-010/TO 13C7-1-5.
3 Place the release assembly on the honeycomb over the breech area and tie the release to
convenient points on the load according to FM 4-20.102/MCRP 4-11.3J/NAVSEA SS400-
AB-MMO-010/TO 13C7-1-5.
4 S-fold and tie slack in the suspension slings with type I, ¼-inch cotton webbing.
5 Tape each section of the deadman’s tie to the honeycomb.
Figure 6-14. M-1 Release Installed
6-20
FM 4-20.119/TO 13C7-10-31
10 May 2006
Rigging M101A1 Howitzer for Low-Velocity Airdrop on Type V Platform
INSTALLING PROVISIONS FOR EMERGENCY RESTRAINTS
6-13. Install provisions for emergency restraints on the front of the platform according to FM
4-
20.102/MCRP 4-11.3J/NAVSEA SS400-AB-MMO-010/TO 13C7-1-5.
PLACING EXTRACTION PARACHUTES
6-14. Select the extraction parachute and extraction line needed using the extraction line requirements
table in FM 4-20.102/MCRP 4-11.3J/NAVSEA SS400-AB-MMO-010/TO 13C7-1-5. Rig the extraction
line in an extraction line bag according to TM 10-1670-286-20/TO13C5-2-41. Place the extraction
parachute and extraction line on the load for installation in the aircraft.
MARKING RIGGED LOAD
6-15. Marked the rigged load according to FM 4-20.102/MCRP 4-11.3J/NAVSEA SS400-AB-MMO-
010/TO 13C7-1-5 and as shown in Figure 6-15. Complete Shipper’s Declaration for Dangerous Goods
according to AFMAN 24-204(I)/TM 38-250. If the load varies from the one shown, the weight, height,
CB, tip-off curve, and parachute requirements must be recomputed.
EQUIPMENT REQUIRED
6-16. Use the equipment listed in Table 6-1 to rig the load shown in Figure 6-15.
10 May 2006
FM 4-20.119/TO 13C7-10-31
6-21
Chapter 6
CAUTION
Make the final rigger inspection required by FM 4-20.102/MCRP 4-
11.3J/NAVSEA SS400-AB-MMO-010/TO 13C7-1-5 before the load
leaves the rigging site.
CB
RIGGED LOAD DATA
Weight: Load shown
9,500 pounds
Maximum load allowed
10,000 pounds
Height
79 inches
Width
108 inches
Overall Length
192 inches
Overhang: Front
25 inches
Rear (EFTC)
18 inches
Rear (EPJS)
30 inches
Center of Balance (from front edge of platform)
96 inches
Figure 6-15. M101A1 Howitzer Rigged for Low-Velocity Airdrop on a Type V Platform
6-22
FM 4-20.119/TO 13C7-10-31
10 May 2006
Rigging M101A1 Howitzer for Low-Velocity Airdrop on Type V Platform
Table 6-1. Equipment Required for Rigging M101A1 Howitzer for Low-Velocity Airdrop on a
Type V Platform
National Stock Number
Item
Quantity
8040-00-273-8713
Adhesive, paste, 1-gallon
As required
Clevis, suspension:
5
4030-00-678-8562
3/4-inch (medium) emergency restraint
2
4030-00-090-5354
1-inch (large)
5
8305-00-184-2034
Cloth, cotton duck, 60-inch
As required
4020-00-246-0688
Cord, nylon, type III
As required
1670-00-434-5785
Coupling, airdrop, extraction force transfer with
1
16-foot cable
1670-00-360-0328
Cover, clevis, large
3
8135-00-664-6958
Cushioning material, packaging, cellulose wadding
As required
8305-00-191-1101
Felt, ½-inch
As required
1670-01-183-2678
Leaf, extraction line
2
1670-01-064-4452
Line, drogue, 60-foot (1-loop), type XXVI nylon webbing
1
Line, extraction, type XXVI nylon webbing:
1670-01-062-6313
60-foot (3-loop)
1
Or
1670-01-107-7651
140-foot (3-loop)
1
Link assembly, two-point:
1670-01-493-6418
3 3/4-inch
1
1670-01-493-6420
5 1/2 -inch
1
5510-00-220-6146
Lumber, 2- by 4-inch
As required
5315-00-010-4659
Nail, steel wire, common 8d
As required
1670-00-753-3928
Pad, energy-dissipating, honeycomb
8 sheets
Parachute:
1670-01-016-7841
Cargo, G-11
2
1670-01-063-3716
Cargo, extraction, 22-foot
1
1670-01-063-3715
Drogue, 15-foot
1
Platform, airdrop, type V, 16-foot
1670-01-353-8425
Bracket assembly, coupling
1
1670-01-353-8424
Bracket assembly, extraction
1
1670-01-162-2372
Clevis assembly
40
1670-01-162-2381
Tandem link
4
5530-00-128-4981
Plywood, ¾-inch
1 sheet
1670-01-097-8816
Release, cargo parachute, M-1
1
10 May 2006
FM 4-20.119/TO 13C7-10-31
6-23
Chapter 6
Table 6-1. Equipment Required for Rigging M101A1 Howitzer for Low-Velocity Airdrop on a
Type V Platform (Continued)
National Stock Number
Item
Quantity
Sling, cargo airdrop:
For deployment line:
1670-01-062-6304
9-foot (2-loop), type XXVI nylon webbing
1
For riser extension:
1670-01-062-6302
20-foot (2-loop), type XXVI nylon webbing
2
For suspension:
1670-01-062-6301
3-foot (2-loop), type XXVI nylon webbing
4
1670-01-062-6303
12-foot (2-loop), type XXVI nylon webbing
4
1670-00-040-8219
Strap, parachute release, multicut
2
7515-00-266-5016
Tape, adhesive, 2-in
As required
1670-00-937-0271
Tie-down assembly, 15-ft
43
1670-01-483-8259
Tow release mechanism (H-block for C-17)
1
Webbing:
8305-00-268-2411
Cotton, 1/4-inch, type I
As required
Nylon:
8305-00-082-5752
Tubular, 1/2-inch
As required
8305-00-263-3591
Type VIII webbing
As required
6-24
FM 4-20.119/TO 13C7-10-31
10 May 2006
Glossary
AFB
Air Force Base
AFMAN
Air Force manual
AFTO
Air Force Technical Order
AMC
Air Mobility Command
APERS
aintipersonnel
ARNG
Army National Guard
CB
center of balance
d
penny
EFTC
extraction force transfer coupling
EPJS
extraction parachute jettison system
FM
field manual
HERAP
high-explosive rocket-assisted projectile
HMMWV
high mobility multi-purpose wheeled vehicle
HQ
headquarters
NAVSEA
Naval Sea Command
MCRP
Marine Corps Reference Publication
NBC
nuclear, biological, chemical
no
number
OVE
on-vehicular equipment
TM
technical manual
TO
technical order
TRADOC
Training and Doctrine Command
w
with
10 May 2006
FM 4-20.119/TO 13C7-10-31
Glossary-1

 

 

 

 

 

 

 

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