Extreme Speed Prop Planes Discuss the need for speed with fast prop planes (Screamin Demon, Diamond Dust, Shrikes or any REAL sound breakin'''' plane)

webra speed 55 P5, speed engine?

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Old 04-22-2011, 07:38 PM
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gsalort1978
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Default webra speed 55 P5, speed engine?

Hi, Is WEBRA SPEED 55 P5 http://www.jvsegrelles.com/ficha_articulo.asp?id=438 a suitable engine for a speed plane like Diamond dust, screaminf demon?

Is this engine a 5 ports engine timed for high RPM?

Regards.

Gabriel.
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Old 04-22-2011, 07:50 PM
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freakingfast
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Default RE: webra speed 55 P5, speed engine?

Low timed, even lower than a OS 55 AX I believe. Poorly documented intended applications/much confusion. With 5 ports you would think it would be a speed engine. This engine didn't help Webra stay in business. The Webra 55 GT (black head) was timed a bit higher than average, about 16K target ground rpm, a much better engine IMHO.
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Old 04-23-2011, 06:42 AM
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Default RE: webra speed 55 P5, speed engine?

Good grunt motor. Fairly heavy. Comes with a very large barrel carb. They made a heli version of these motors that has a lot of torque. I have the .61 version and though the helo it was in was converted to a .91 the .61 was pretty darn good. I still have it and will someday(???) put it in an airplane.

On the right engine with the right prop the .55 could go fast but a small light airframe like the DD is no place for it.
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