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

Fuel ???

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Old 05-12-2006, 05:52 AM
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raven_1978
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Default Fuel ???

Ok guys, so im finally ready for my maiden flight of my Cermark F-20 Tigershark. I currently have an OS 40 FX w/stock a exhaust on it, a MAS 10x6 prop and i was wondering what fuel (10,15,20,30%) to run in it to get the most out of it but not burn it out. If it matters any im at 305' ASL in ontario canada

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Old 05-12-2006, 08:28 AM
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bob27s
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Default RE: Fuel ???


ORIGINAL: raven_1978

Ok guys, so im finally ready for my maiden flight of my Cermark F-20 Tigershark. I currently have an OS 40 FX w/stock a exhaust on it, a MAS 10x6 prop and i was wondering what fuel (10,15,20,30%) to run in it to get the most out of it but not burn it out. If it matters any im at 305' ASL in ontario canada

Just run regular ole 10 or 15% sport fuel. What ever you have laying around will do fine.

With the stock muffler and a 10x6, going up in nitro might get you...what.... 500-600 rpm at best ? Not worth it for about 1 mph

Just make the engine happy, and keep it simple.
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Old 05-12-2006, 11:15 AM
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Flyboy Dave
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Default RE: Fuel ???

15% would be about tops for the engine for general use. You might want
to give a 10-7 MAS a try too. Make sure the prop, spinner and backplate
are perfectly balanced, or they will rob you of RPM and speed.

FBD.
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Old 05-12-2006, 11:49 AM
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Mike Connor
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Default RE: Fuel ???

The easiest way to get more power from that engine is to add a JettStream muffler for around 1500 rpm more. I would make sure it would fit on the F-20 before ordering.
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Old 05-13-2006, 04:27 PM
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Hi!
The first thing you should do to get more speed is to replace that MA prop with an APC.
/Jan K

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Old 05-14-2006, 12:08 AM
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Hi!
The first thing you should do to get more speed is to replace that MA prop with an APC.
/Jan K
Uh-oh!!! I don't think Flyboy Dave is going to like that
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