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BMW 8025

BMW Triebwerkbau GmbH, Munchen-Allach

BMW 8025 small turbojet engine developped by BMW Triebwerkbau GmbH., Munich Allach, is based on the company's BMW 6002 portable gas turbine powerplant introduced in 1959.

The 8025 has a dry weight of 77 lb. Takeoff thrust is approximately 79 lb. which, without any change in basic engine weight and dimensions, will be increased to about 93 lb. 

The engine is fitted with an electric starter and operates on any standard fuel, but for economy and safety the use of light fuel or diesel oil is recommended. Fuel also is used for lubrification. 

Prototype of the BMW 8025 was shown for the first time at the 1960 Hanover Air Show. 8025 had proved most successful installed in the Allgaier H.30TS.


First Built1959
Engine typeTurbojet
Compressor air mass flow0.88kg/s
Number of compressor stages   1, radial
Compressor pressure ratio3.1
Combustor.Disc combustor
Number of turbine stages.1, radial
Reduction gear ratio (range) 0.040.18
Engine length.713mm
Engine diameter380mm
Dry weight45kg
Shaft power output.66kW / 90hp
Rotor speed 45,000 rpm
Specific fuel consumption 780g/kwh (approx.)

BMW 8025. Source : Aviation week, June 1960

BMW 8026

BMW Triebwerkbau GmbH, Munchen-Allach

BMW 8026 Envisaged chiefly as a means of making gliders and  sailplanes independent of winches or tugs, the 8026 turbojet weighs 84 lb. and consumes 4.4 gal of diesel oil in 25 min. 

BMW suggested 15 min for take-off and climb to 6,600 ft, there after soaring with 10 min power always available should lift be absent.

Electric starting is provided for operation from the cockpit, lubrication is effected by adding oil to the fuel, and BMW claimed that "in service no maintenance is necessary except refuelling."

BMW 8026