The UL260ISA is basically an UL260IS engine. A modified engine casing, oil sump and oil pick up system, designed by our very own ULPOWER team, and an additional inverted oil system allows the ULPOWER engines to fly inverted.
This inverted oil system copes with potential greasing issues. The oil pick-up tube in the oil sump is mounted with a hinge joint. While climbing or diving up to an angle of 90°, the oil pump can pick up the oil from the sump without any problem.
The oil inverted valve can change the pick-up direction while climbing or inverted flying, this means that the oil is coming from the top of the engine casing (which is now the lowest point).
The large (but light) “oil air breather” prevents the oil from leaving the engine.
The fuel injection system (instead of carburetor) prevents the engine from stopping or losing fuel when flying inverted. IMPORTANT REMARK: modification in your fuel tank is needed to prevent engine from sucking air.
Oil capacity: Oil sump must be filled with at least 4 liter oil.(1.06 US gal)
|Displacement||2592 cc [158.17 cu in]|
|Bore||105.6 mm [4.157 in]|
|Stroke||74 mm [2.913 in]|
|Compression Ratio||9.10 : 1|
|Firing Order||1 - 3 - 2 - 4|
|Direction of Rotation||Clockwise - seen from cockpit|
|240 Nm [177 ft.lb] @ 2800 rpm|
|107 hp @ 3300 rpm / 93hp@2800 rpm|
|Installed weight||74.8 kg [164.9 lbs] (including all accessories, oil and exhaust)|
|DC output||30 Amp (+/- 15 Amp available above engine/fuel pump needs)|
|Oil capacity||4.0 L [0.79 US gal]|
|Fuel||Unleaded automotive gasoline with min. 97 oct. RON (89 MON = 93 AKI).
AVGAS 100LL or AVGAS UL91 may also be used if specified fuel is not available.
The power and torque curve of the engine has been established by repeated dyno tests, which were performed at sea level and in weather conditions close to the ISA standard. The following graph shows the real, available power and torque coming from the crankshaft of the UL260iSA engine corrected to the International Standard Atmosphere conditions at sea level.
The following graph shows the power the UL260iSA engine produces at a given manifold pressure (MAP) running at a particular rpm. When taking your MAP reading and corresponding RPM at cruising speed, the graph gives you a good idea of how much (little) power your aircraft actually needs in flight.
The following graph shows the calculated available power of the UL260iSA engine at different RPM settings, WOT (wide open throttle) and varying density altitude.
|Maximum dimension in X direction (length)*||553 mm [21.77 inch]|
|Maximum dimension in Y direction (width)*||655 mm [25.75 inch]|
|Maximum dimension in Z direction (height)*||472 mm [18.6 inch]|
For more details please check the installation manual.
These are values at full throttle. When cruising estimated average is UL260 ±13l.
(depending on type of plane, personal style of flying, cruise speed , climate circumstances)
The following is a list of the ULPower engine standard design features, all included at no additional cost.
Please contact us for more info / prices
Note: Pictures may not always represent the exact colour or shape.
All prices indicated are excluding taxes and transportation costs.
Deliveries to private individuals within the European Union are subject to 21% Belgian VAT. Prices subject to change without notice.