The M4A2 (white bag) Propelling Charge is a separate loading charge used in 155mm howitzers for firing in Zones 3, 4, 5, 6, and 7.
The full M4A2 Propelling Charge consists of 13.4 lbs (6 kg), of M1 propellant and is divided between a base charge and four unequal increments loaded in white cloth bags. The increments are connected by four cloth tapes sewn to the base and tied on top of increment. The igniter contains clean burning igniter (CBI) in a red cloth pad sewn to the bottom of the base charge.
|
Increment |
Propelling Composition |
Web size (in) approx. |
Weight (lbs) approx. |
| 3 | M1, SP | 0.33 | 4.0 |
| 4 | M1, SP | 0.33 | 1.2 |
| 5 | M1, SP | 0.33 | 1.7 |
| 6 | M1, SP | 0.33 | 2.8 |
| 7 | M1, SP | 0.33 | 3.4 |
| Technical data: | |
| Type | White bag, separate loading |
| Weight | 6.35 kg |
| Length | 53.34 cm |
| Colour | White with black markings |
| Propellant | M1 (6.08kg explosive) |
| Cannon used with | M1, M1A1, M45, M126, M126A1, M185, M199 |
| Technical data: | |||
| Temperature Limits | Firing | Lower limit | -40 °F (-40 °C) |
| Upper limit | +125 °F (+51 °C) | ||
| Storage | Lower limit | -80 °F ( -62 °C) (for periods not more than 3 days) | |
| Upper limit | +140 °F (+60 °C) (for periods not more than 4 hrs/day) | ||
| Packing | One (1 ) M4A2 propelling charge is packed in one (1) metal container. Twenty eight (28 ) metal containers M13A2 packed in one (1) wooden palette. |
||
