Learned this weekend: among the reasons soldiers needed to identify the planes by sight - the B-29 had a computer-assist turret that adapted to target range and

Learned this weekend: among the reasons soldiers needed to identify the planes by sight - the B-29 had a computer-assist turret that adapted to target range and relative velocity. But it could only estimate range appropriately if the gunner dialed in the wingspan of the target so that dialing the reticle to "pin" the target wing-to-wing corresponded to the correct range. Training film: https://www.youtube.com/watch?v=mJExsIp4yO8 https://www.youtube.com/watch?v=mJExsIp4yO8