Restoring the BT-13 Fuel Guage for the Stearman

Stearman model 75 aircraft typically have one of two types of fuel gages installed, the most common being the straight wire with an indicator within a tube, and the remainder being the round-faced BT-13 type gage. The BT-13 manual calls this the Type 122-150-A fuel gage. The Type 122 gage [...]