BOMB HOISTS

LEARNING OBJECTIVE: Recognize the purpose and use of bomb hoist and identify the loads for each.

A hoist is a mechanism that provides a mechanical advantage when raising or lowering heavy loads, such as bombs, mines, and torpedoes.

REVIEW NUMBER 4 ANSWERS TO QUESTIONS Q1. THROUGH Q3.

Figure 9-21.-Mk 109 Mod 0 container lifting sling.

Figure 9-22.-H416 bomb and container sling.

HLU-288/E BOMB HOIST

The HLU-288/E bomb hoist (fig. 9-23) consists of a gear train, drum and cable, brake mechanism, fishing pole type of extension tube, a rachet crank, and a brake crank. The cable drum rotates in the direction opposite to that of the cranks. The rachet crank is used to help hoist the load, and it can be disengaged from the gear train by latching the rachet pawl. The brake crank is used to hoist and lower the load. After a load is lifted, a clutch-type brake locks the gear train.

The HLU-288/E bomb hoist is used with single hoist ordnance loading system (SHOLS) adapters to load various weapons onto a variety of aircraft. The hoist can use a short or long cable for loading onto wings, fuselage, and bomb bay stations. The HLU-288/E replaces the Aero 14C bomb hoist, which is obsolete.

HLU-196B/E BOMB HOISTING UNIT

The HLU-196B/E bomb hoisting unit (fig. 9-24) is a lightweight, portable, gasoline, engine-driven unit. It consists of a gasoline engine, speed-reducing gearbox and brake, and a cable assembly and storage drum that incorporates a clutch and a boom. All components and controls are mounted on a two-wheeled frame assembly. The entire unit weighs 75 pounds. It has a direct, single-cable lift capacity of 2,000 pounds. A double-cable lift capacity of 4,000 pounds is obtainable by using various trolleys and rack adapters that are available. You can extend the cable by disengaging the clutch and manually pulling it until the necessary length is withdrawn. To reel the cable in, you must start the engine, engage the clutch, and carefully throttle the engine to control the reel-in speed of the cable. Maximum reel-in speed of the cable is 15 feet per minute.

The HLU-196B/E unit is used to single or, by the use of various trolleys and adapters, double hoist various weapons and stores.