Cleaning and Preserving Materials

The following cleaners and preservatives are required for use with this materiel. See TM 9-8 i0 for information additional to that contained in this manual on the use of these materials. Refer to Department of the Army Supply Catalog OKI.) 3 SMj K-l, which is the authority for requisitioning these items. Cloth, crocus, sheets, 9 by 11 inches. Enamel, synthetic, olive-drab, luster less.

Inch Rocket Launchers M And Mb

DEPARTMENT OF THE ARMY AUGUST 1950 United States Government Printing Office Washington 1950 Washington 25, D. C., 10 August 1950 TM 9-297 is published for the information and guidance of all concerned. AG 471.94 (8 Aug 50) By order or the Secretary of the Akmy EDWARD F. WITS ELL Chief of Staff, United States Army Major General, USA The Ad'jutant General Tech Sv (2) except 9 (25) Arm & Sv Bd (2) AFF (2) OS Maj Comd (10) Base Comd (2) MDW (3) A (20) CHQ (2) D (2) R2, 6, 7, (1), 9 (2) Bn 2, 3,...

Failure To Fire

Failure to fire generally is caused either hy defective ammunition or defective firing mechanism. a. If the contact wire is loosely connected to the rocket, the rocket is defective and will be turned over to ordnance maintenance personnel. b. Defective firing mechanism may be due to spent magnets, loose connections, or broken parts. C. Kemove the trigger grips (par. 48' (1) and b (1) and check firing mechanism for loose joints or contacts and for breakage. If anv part of the firing mechanism is...

Equipment

Equipment supplied with the Launcher, rocket, 3.5-mch. M20 and M20B1 is listed in Department of the Army Supply Catalog ORD 7 SNL B-42, which is the authority for requisitioning replacements. The gun sling Ml (webbing), identifying number (> f> 440o8. is the only item of equipment required for use with the launchers M20 or M20B1 (figs. 18 and 20). 34. General Lubrication Instructions a. Lubrication will be accomplished carefully and sparingly. Excess oil will be wiped off. b. Excess oil...

Operational Inspection

Inspect the launcher for general condition, loose or broken components. painting defects, bends and dents, or for obstructions in the bore (par. 9). h. Check (lie fund oiling of (lie barrel coupling lock. When the barrels are coupled in any of lhe three locked positions, the front barrel must be locked firmly in the rear barrel without play. c. Check functioning of the monopod. The operation of the mono-pod in extending and retracting the monopod leg should be smooth. The monopod leg and...

General

Upon receipt of new or used materiel, it is the responsibility of the officer in charge to ascertain whether it is complete and in sound operating condition. Reference to paragraphs 44 through 58 will provide information on the components of the various major groups of the launcher. b. A record will be made of any missing parts and of any malfunctions. Any such conditions will be corrected as quickly as possible. c. Attention will be given to small and minor parts as these are the more...

Section Iv Operation Under Usual Conditions Preparing Launcher for Firing

Rocket Launchers Firing

1 Release the barrel latch par. 14 and disengage the barrels fig. 0 . 2 Raise the barrel coupling lock lever and hold it in its unlocked position par. 13 . Screw the front barrel into the coupling nut of the rear barrel fig. 30 . Release the lock lever. 3 When these directions have been followed, the launcher is ready for loading while held in the standing, kneeling, or sitting positions. The launcher also may be fired from the prone position, in which case it is stood upon the bipod and...

References

The following publication indexes, and lists of current, issue should be consulted frequently for latest changes or revisions of references given in this appendix and for new publications relating to mat riel Index of administrative publications__________________ SR 310-20-5 Index of Army motion jnctures and film strips__________SR 110-1-1 Index of Army training publications_________________ SR 310-20-3 Index of blank forms and Army personnel classification 310-20-6 Index of technical manuals,...

Disassembly and Assembly

M20 Rocket Launcher

1 For the M20 launcher the monopod stock assembly can be separated from the rear barrel by removing the nuts and lock washers from the two screws which fasten the front and rear clamps of the monopod stock to the rear barrel. Withdraw the screws and pry the clamps off the barrel, being careful not to damage the aluminum tube of the contact lead wire. These clamps do not exist on the M20B1 launcher. Remove four screws which fasten the stock to a pad on the rear barrel of the M20B1 launcher. 2...

Classification

Ammunition for this rocket launcher consists of the following types which are classified according to the rocket head as high-explosive antitank HE, AT and practice. The same motor is used for both types. b. High-explosive antitank rocket heads are thin-walled and contain a relatively large shaped charge of high explosive especially designed for penetrating armored targets. c. Practice heads used for training purposes are completely inert. They are of the same size, shape, and weight as the...

Shipment And Limited Storage And Destruction To Prevent Enemy

Inch Rocket Launcher

SHIPMENT AND LIMITED STORAGE 74. Domestic Shipping Instructions a. Preparation. When shipping the 3.5-inch rocket launchers interstate or within the zone of interior, the officer in charge of preparing the shipment will be responsible for furnishing launchers to the carriers for transport in a serviceable condition, properly cleaned, preserved, packaged and packed as prescribed in paragaph 7f gt . Caution Personnel withdrawing launchers from a limited storage status for domestic...

Launcher Rocket Inch M M B

Inch Rocket Launcher

BORE-After irinci ond on 3 consecutive doys thereafter. clean with CR After dth cleaning dry, oil with PL Medium obove 32'F . PL Speciol below 32c F. Vipe deon belor liring When weapon is not being fued, renew oil film weekly tn humid ond Jolt air oreoj. use PL Medium FIRING MECHANISM, C7313326 BARREL COUPLING LOCK. BIPOD LEG LOCK BUTTONS. BIPOD SLIDE, BIPOD REAR RING LOCK CONTACTOR LATCH, AND MONOPOD - WeeUy ond oiler firing, oil with PL Medium obove 32'F , PL Special below 02rF In humid and...

Section Ii Description And Data Description

M20 Inch Rocket Launcher

The 3.5-inch rocket launchers M20 fig. 6 and M20B1 figs. 4 and 5 are two-piece smooth-bore weapons of the open tube type and arc fired electrically. The weapons are arranged to be fired from the shoulder in standing, kneeling, and sitting positions. A bipod and rear support permit firing in the prone position fig. 3 . To save weight and improve portability, the barrels and many other parts are made of aluminum. These launchers are used to launch smoke rockets and high-explosive rockets...

Section Iii Launcher Controls And Sighting Equipment

Firing Button

The trigger is located in front of the trigger grip fig. 30 . It is made of aluminum. b. Some rocket launchers M20 are equipped with electric firing mechanism C7313326 single action-fig. 7 . After the trigger of this mechanism is squeezed a spring returns it to its normal position when the trigger is released. The movement of the trigger, when it is squeezed and released, rocks the armature of a magneto firing mechanism which is housed in the trigger grip. The rocker arm and armature provide...

Special Tools and Equipment

Rocket Launcher

The special tools and equipment tabulated in table II are listed in Department of the Army Supply Catalog ORD 6 SNL B-20. This tabulation contains only those special tools and equipment necessary to perform the operations described in this manual, is included for information only, and is not to be used as a basis for requisitions. Tabic J J. Special tools and equipment for field and depot maintenance Tabic J J. Special tools and equipment for field and depot maintenance TESTER, elec output,...

Identification

Rocket Nozzle Insulation

Ammunition and ammunition components are completely identified by the painting and marking including an ammunition lot number which appears on all original packing containers and, when practicable, on the item itself. i'NSULAT NG TU8ING PROTECTS STRIPPED -SNC Of BLUE LEAD blue lead hemove insulating tu3in6 before con-nectimg . wire to contact swung ' contact riv3 .lot number type and . .model of f 'rocket -olive dsa2 v.'itm marking IN yellow- A-ROCKET. HI, AT, 3.5-1 HCH. M28A2 SHOWN...

Section I General

These instructions are published for the information and guidance of all concerned.12 They contain information on the operation and organizational maintenance of the 3.5-inch rocket launcher M20, as originally manufactured and as modified, and on the 3.5-inch rocket launcher M20B1. The information in this manual is intended for the using arms and services, however, certain testing, adjusting, and maintenance information on this weapon for ordnance maintenance personnel is included....

Section Vi Front And Rear Barrel Group General

Rocket Wire For Springs

The front and rear barrels are joined by means of the barrel coupling screw on the rear end of the front barrel and the barrel coupling nut. on the forward end of the rear barrel. The barrel coupling screw and nut and both barrels are made of aluminum. On the Mi2t gt Bl launcher, these parts are cast integral with the barrels. The coupling screw and nut contain a single-thread interrupted screw, so arranged that only about 0t clockwise rotation completely engages the front barrel in the rear...

Contents

Description and data Section I. General--------------------- - II. Service upon reccipt of III. Launcher controls and sighting equipment_______ - 11 20 11 IV. Operation under usual V. Operation under unusual CHAPTER 3. MAINTENANCE INSTRUCTIONS. Section I. General-. ________ . ____________30-31 27 II. Parts, special tools, and equipment for organizational maintenance- ________32 33 27 IIJ. Lubrication_________ ____________ ________________34 35 28 IV....