For those who are challenged by Weight and Balance Calculations

[Keith Lane]

I saw this at the aircraft museum in Oakland Ca. A while back, and ran across this picture while rummaging around the hard disc.
It sure would makes quick work of the calcs on a large plane such as the seaplane it was used in. The back side was (is) a mass of gears to control the pointers. If I can find it. I might have a pic of the back side. If I find it I'll post as well.

Edit: not my pic, but here is a shot of a similar model, for the Lockheed PV-1.
http://dcoward.best.vwh.net/analog/libra.htm

 

[ScottM]

That is very cool.

 

[mantakos]

Cool! A W&B app!
-harry

 

[AdamZ]

I think Shelby has one of those on his Cherokee Actually that is quite impressive.