Measuring Triangle (Meßdreieck) for German MG 34 and MG 42 Machine Guns A4 Skyhawk Here is a combination Airspeed

Here is a combination Airspeed Machspeed Indicator

indicative of a manufacturing year 1943

This 60-page book published in 1970 covers the development and operational history of the Grumman TBF/TBM Avenger Torpedo Bomber

and P2 Neptunes

Measuring Triangle (Meßdreieck) for German MG 34 and MG 42 Machine Guns A4 Skyhawk Here is a combination AirspeedHere is a highly unusual and complicated instrument a German Medreieck (Messdreieck), or measuring triangle, used by MG 34 or MG 42 Machine Gun crews during WWII. The measuring triangle was used to optimize the fire efficiency of machine guns and to calculate distances. It may also have been used to support artillery aiming. We found a chatroom with the following information from "Roger": It resolves trig functions, but cannot directly calculate where