1. This disengages his hand wheels , and gives elevation control to the Fire Control System. 2. To find out if you have an older cylinder, check the valve hand wheel . 3. A large hand wheel is also attached with a pawl gear to prevent back-slipping. 4. Elevating and transversing hand wheels , and panoramic sight are at the left of the breech. 5. This disengages his hand wheels , and gives train angle control to the Fire Control System. 6. The machines came in a number of variants with sliding, hand wheel or keyboard selected letters. 7. The lubricators were also fitted with a priming hand wheel on the outer face of the lubricator. 8. Later investigation of the recovered wreckage suggested instead that the rear right-hand wheel had failed, overturning Babs. 9. He changes the bearing of the gun, by moving his hand wheels , until the dial difference is zero. 10. He changes the elevation of the gun, by moving his hand wheels , until the dial difference is zero.
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