Operating Instructions for AN/APN-1/A Aircraft Radio Altimeter 1943 A-6 for a dual engine aircraft

for a dual engine aircraft

See the spec sheet in the photo gallery from the Index of Army Aeronautical equipment Volume 6 Instruments

The fifth section

Still not bad for an artifact that is more than 70 yrs old

1000 lb bomb set at No 8

Operating Instructions for AN/APN-1/A Aircraft Radio Altimeter 1943 A-6 for a dual engine aircraftThis is an original WWII era manual, Handbook of Operating Instructions for AN APN 1 and AN APN 1A Aircraft Radio Altimeter system, dated June 1943. The Radio Altimeter was used in a number of aircraft of the US Army Air Force and US Navy where close monitoring of height over terrain was critical, such as torpedo bomber TBM Avenger (see image from TBM Flight Manual), dive bomber SB2C Helldiver, patrol aircraft PV 1 Ventura, PV 2 Harpoon, PBY Catalina,