I just wanted to point out that the B-17 and B-24 Sperry ball turret pedals didn't control the turret in the way you suggest. The left pedal moved and was used to adjust range to target, as indicated by the site reticule changing in width. The gunner moved his left foot to adjust the "uprights" as needed to keep the target wingspan framed as the enemy got closer. That "told" the computing sight the rate of closure. Using hand grips, the gunner also kept the target framed laterally, "telling" the computing sight how the target was moving left-to-right, etc. The site also received own-aircraft altitude, own-aircraft speed, and it's elevation and azimuth position with respect to own-aircraft.
The right pedal was a footrest. However, some turrets had a back-up foot switch to fire the guns when failures forced the gunner to disengage the drives and crank the turret by hand. I don't think the Sperry ball had that.
Last edited by Buster_Dee; 06-07-2014 at 10:33 PM.
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