## (e) Stonping Blower 

1. Turn off button on pilot’s p~nel. 

2. Vfuen the airship is in flight with the Homelite Model HRU-28 auxiliary blower stopped, a partial vacuum is set up in the exhaust. This partial vacuum draws fuel into the crankcase. In many instances, this has resulted in bursting the crankcase or cylinders and pistons when the pl~nt was started. To prevent this, the fuel line shut-off valve must be tightly closed whenever the plant is stopped, whether in flight or at the airship base. 

## (f) LaDel Electric Blower 

NOTE: Engine can also be stopped by pressing red stop button, mounted on me.gneto stator plate until engine stops. 

The production schedule calls for a LaDel electric blower to replace the gasoline powered blower, described above, on airships K-99 and future. The only source of power for this blower is the Lawrance auxiliary generator. The auxiliary generator must be running at rated speed before the electric blower may be used. 

## (5) Summary: Pressure Control System 

## (a) Settings 

1. Forward Air Valve: Begins to open at 1.50 inches of water of air pressure in the forward ballonet as read on car manometer. 

2. Aft Air Valve: Begins to open at 2.00 inches of water of air pressure in the aft ballonet as read on car manometer. 

3. Gas Valve: Begins to open at 2-1/2-inches of water as r ead on gas manometer. 

(b) Control, Instruments & Auxiliaries Chart See Fig. XIII 

(c) Operation Chart See Fig. XIV 

