Japanese Navy Ships Plans, Collection of 58 Drawings HH-3 Helicopter according to its parts manual

according to its parts manual dated 1982

We have yet to link it to a specific aircraft of the USAF

The stock number R88-I-2025 is also stamped in yellow on the side of the casing

It is about 1/2 inch thick

This pitot tube is labeled BU AERO USN

Japanese Navy Ships Plans, Collection of 58 Drawings HH-3 Helicopter according to its parts manualThis collection of 58 WWII Imperial Japanese Navy Ships Plans is from the estate of noted naval historian and author Robert Sumrall. The written content of each drawing is in Japanese with some English annotations. Included are drawings of 15 IJN ships, including carriers Hiryu, Akagi, Unryu, battleships Nagato, Mutsu, Ise, Kirishima, Yamato, etc., and some cruisers and other ships. Drawings include different angles and elevations. Drawings are in