Kolm BX-155V4-2

The BX-155V3-2 is without a doubt the flat twin for glider towing up to 25 kilos (55 lbs) in weight and for aerobatic models. Even a small silencer makes the BX-155V3-2 an absolutely whispering power unit. With the optional brushless electric starter you have a power unit that leaves nothing more to wish for.

The BX-155V3-2 has been developed from the BX-135-2 by replacing the steel cylinder sleeves with Nickel-Silicon plated aluminum cylinders. Replacing the steel cylinders with Nickel-Silicon plating on the original aluminum cylinders enlarged the bore and has resulted in an increased capacity and, of course, more power with less weight.

Hans Kolm developed the BX-155V3-2 especially for competition glider towing, he tested the engine in a series of models. The result is an extraordinarily reliable engine for your valuable model.

Nickel-Silicon plated cylinder surfaces, far lighter than steel cylinder liners guarantee high wear resistance

Assembled heat-treated steel crankshaft with Tungsten balance weight inserts

Conrods are CNC milled from high strength steel, and have a spindled bore surface for the big end needle roller bearings

Plain bronze small end bearings

Single camshaft acting on overhead valves by pushrods

A light weight, low inertia valve train allows relatively high RPM

Crankcase CNC milled from high-strength aerospace alloy

Excellent Müller-Microprocessor-Ignition developed by Günter Müller in Germany, now made in Austria by Kolm Engines.

Valves and pistons are manufactured at Kolm Engines in Austria on modern CNC machines