BMEP Gauge- PBY/PBM-5/P-2 JRM-1 Martin Mars- Kollsman 647K-02

Normal 0 false false false MicrosoftInternetExplorer4 Offered in this listing is an authentic Engine BMEP Gauge from the late 1940's, made by Kollsman PN 647K-02. The body of the instrument has a label of the US Naval Air Station Coco Solo, Panama, (see photos, hard to discern, but I've sold 3 from this lot which are identical to this one including the label), and may have been installed aside others like it in a large multi-engine piston-powered aircraft. I have located this instrument on the engineers panel of the US Navy's floatplane JRM-1 Martin Mars, in its flight manual dated 1947.  Only 7 were ever built. The face is embossed BU AERO US NAVY (i.e., Bureau of Aeronautics US Navy).  NAS Coco Solo housed several Patrol/Patrol Bomber aircraft during its tenure, including PBY Catalina's, PBM-5 Mariners, and P2 Neptunes. BMEP is the acronym for Brake Mean Effective Pressure, and the gauge measured each engine's crankshaft torque by measuring oil pressure in the engine pl