A-10 Warthog Flight Manual 1980 ME-210 The precursor AN/APN-1 Radio Altimeter

The precursor AN/APN-1 Radio Altimeter was used in a number of aircraft of the US Navy where close monitoring of height over terrain was critical

Here is a WWII-era pneumatic Directional Gyro/Turn Indicator made by Jack & Heintz

The main tanks had a capacity of 202 gallons each

See diagram from the UH-1 Flight Manual

and a larger direction indicator pointer

A-10 Warthog Flight Manual 1980 ME-210 The precursor AN/APN-1 Radio AltimeterThis is an authentic, original USAF Flight Manual for the A 10 Warthog Attack Aircraft. Hundreds of pages (paginated in sections), ~ 1. 25 inches thick. Black and white with color complimented technical diagrams. Restoration inquiries are welcome.