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.
BMW 8025 Technical data
|Manufacturer||PBS, První brnenská strojírna Velká Bíteš, a.s|
|Diameter||380 mm||14.96 in.|
|Length||713 mm||28.07 in.|
|Not equipped||45 kg||99.2 lb|
|Max RPM||45,000 rpm|
|Thrust at Max||46 kg||101.4 lb|
|Thrust at Idle||kg||lb|
|Pressure ratio||/ 1|
|At max RPM||1.2 kg/daN.hr||1.2 lb/lbf.h|
|At Idle RPM||kg/N/Hr||oz/oz/h|
J.E.T Cobra Technical data
|Manufacturer||James Engineering Turbines Ltd|
|Max RPM||105.000 rpm|
|Idle RPM||33.000 rpm|
|Thrust at max||226 N||50.70 lb|
|Thrust at Idle||N||lb|
|Pressure ratio||3 / 1|
|Max flow||0,31 kg/s|
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."