Front motor configuration is aerodinamicaly more clean compared to typical retractable configuration as there is no additional drag of a pylon, so lower power is required for equal performance. Lower power means smaller motor and smaller battery packs. Alltogether this means less additional weight, and lower costs. We figured out that in the nose of modern glider fuselage, is just enough space to fit small but very powerful custom designed brushless electric motor.
Why choose FES?
Why choose FES?
- Instant (RE)START – No warm up needed
- Much less noise – No loud exhaust noise
- Much Less vibrations
- Full torque from zero to max rpm (BLDC)
- No loss of motor performance at higher altitude
- CLEAN – No fuel pumps, filters, spark plugs nor carburetor icing
- Low carbon footprint
FES as self-sustainer or self-launcher?
FES can be both: self-sustainer or self-launch system.
FES as self-sustainer?
Only 4-5kW of power is required for level fligth of typical FES equipped sailplane. With its maximum power at 22kW good climb rate to safe altitude is guaranted for any modern sailplane incuding two-seaters.
FES as self-launcher?
It is very nice combination with light 13,5m or 15m sailplanes. High landing gear is required to provide sufficient propeller clearence for safe self-launch, also from grass runway. FES is aerodynamically very clean, so 22kW is more than enough power to provide good climb rate for light sailplanes.
Recently we developed also more powerful version of FES system, suitable to self-launch also heavier 18m sailplanes. With high landing gear also self-launch from grass is not a problem without water ballast as demonstrated with new LAK17C FES.