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

Q 500 - os 46df engine

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Old 12-29-2008, 04:08 PM
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gio
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Default Q 500 - os 46df engine

Hi all, what will be the best prop combo for my Q500 with the os 46 DF engine.
What I have now is APC 8-9
8.75-9.5
9-8
9-10

And what will be the best glow plug to use, The fuel I have now is the cool power 15%.
What is the top rpm I will have to look for when the engine is at its max rpm with the wright prop.

Thanks

GIO.
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Old 12-29-2008, 05:14 PM
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Mike Connor
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Default RE: Q 500 - os 46df engine

The DF engine is timed for higher rpm so most people have gone with a 7.4x7.5 CF Q40 prop. The props you have are too much load for that engine to run where it should. That brings up problem #2. A 7.4 prop really isn't suited for a Q-500 airframe. It has been done with fair results so at this point I would continue.
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Old 12-29-2008, 07:35 PM
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Crazy4Flight
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Default RE: Q 500 - os 46df engine

looks like a hobby people Sonic 500.

you may need to reglue the firewall and add support to the wing mounts.

I blew the wing off mine with aa Jett SS.40 and lawn darrted the fuse.

bob
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