Naval Aircraft Instrument Handbook, NAVAER 05-1-568, 1944 Nick Fighter probably for a weight balancing

probably for a weight balancing system prior to this being an automatic process

early versions of the P-47 Thunderbolt

The dial markings are clear and the case is intact

and post WWII

Naval Aircraft Instrument Handbook, NAVAER 05-1-568, 1944 Nick Fighter probably for a weight balancingHere is an original WWII era Naval Aircraft Instrument Familiarization and Inspection Handbook, NAVAER 05 1 568, published in 1944 by the US Navy Bureau of Aeronautics. The 8. 5 by 11 inch manual is divided into 3 sections: Section 1 Flight Instruments 94 pages Section 2 Power Plant Instruments 71 pages Section 3 Navigation Instruments 75 pages Each section contains several pages on each instrument, describing its use, function, operation, and