[link=http://www.bmeengine.com/engines.htm]BME .90[/link]... its basically a SuperTigre converted to gas... who knows its specs?

Announcing the new BME G90 Engine... the first quality/performance gas engine this small ever made! The .90 engine is the same size and weight as the .60 and .75 so why not go for a .90 get morebang for the buck? This new engine is a gas conversion from a SuperTigre .90 glow engine, so it comes with all the history and reputation of the SuperTigre engine line, combined with the engineering expertise of BME Engines... Quality you can trust with robust construction that will last a lifetime.The G90 runs on 32:1 gas/oil mix, so it's economical to operate. Ten ounces of fuel will run 30 minutes at full power. The fuel savings alone will pay for the engine in a short period of time. Plus, there's no oily mess to clean up (who likes to wipe all that oily film left from glow fuel anyway?)

You get a custom built BME crankshaft, connecting rod and piston (needle bearings for gasoline/oil mix). A custom modified crankcase and housing from BME was also in order for optimum gasoline operation.Because we use a Zama pump carburetor, you can now mount your fuel tank anywhere... the carb will pump fuel just like all other gas engines, much better transition and no dead sticks. Experience the ease of electronic ignition... easy to hand start with no glow plugs or glow drivers, and, no field box full of support equipment. Get no weight penalty since the engine weighs about the same and the ignitionwith battery weight is offset by the reduced fuel tank capacity required. The G90 is supplied with a stock muffler but you can use any aftermarket muffler that works on the SuperTigre 90 glow engine.
recommended props 13 x 6, 14 x 16
Yes, no more rusty bearings as with glow engines (gas and oil are natural lubricants and do not absorb moisture from the air as glow fuel does.) That's right... more power and a larger carb, electronic ignition and special BME modifications all add up to an engine that has no power loss and is like a .60 size plane on steroids!

I read all this... but they give no specs...

<pre>SPECS: Bore: 1.083" (27.5mm)Stroke: .976" (24.8mm)Weight w/o muffler: 589g (20.66oz)Weight with muffler: 765g (27oz)Displacement: .90 cu in (14.73cc)Output: 2.5 bhp at 14,800 rpmRPM Range: 2,500-16,000Width between centers of mounting holes: 50mm (1.97")Length between center of mounting holes: 20mm (.79")Width of crankcase excluding mounting flanges: 42mm (1.65")Length from backplate to front of drive washer: 97mm (3.82")Height from bottom of crankcase to top of head: 108mm (4.24")Crankshaft size: 5/16-24</pre>

sweet man! where you get hold of this?

My guess is Tower.

http://www3.towerhobbies.com/cgi-bin...XFV79&amp;P=ML

but this motor I am wanting the specs for is a gasser... they converted the SuperTigre 90 to a gas... the specs will be different my guess?

no, they add a bearing to the rod and a pump carb. The weight will go up a little. Mounting, length should be the same.

power? the same HP and RPM?

good luck in finding that out. There have been several threads on this engine and I can't recall anyone posting numbers. My .90 on glow would rip a MA 14x4 K series at half throttle. Sounded cool. I just bought an ignition kit from CH for my ST .61 (same dimensions as the .91). I'm going to run spark ignition with regular glow fuel. I can't stand the unreliable glow plug setup. Wiping down the plane is no big deal. Now if it was a fabric covered, scale beauty, that would be different.