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 .32 Prop Size?

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Old 12-06-2005, 08:01 AM
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ArthurD
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Default Webra .32 Prop Size?

Anyone know an approximate size prop to use on a Webra .32 installed in a Laser Arrow delta?
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Old 12-06-2005, 01:47 PM
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Default RE: Webra .32 Prop Size?

APC 8X8
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Old 12-06-2005, 01:49 PM
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Default RE: Webra .32 Prop Size?

ART:

Assume you have a ultra thrust muffer or tuned pipe on the thing? With the Ultra thrust muffler, I start with a normal 9 X 6 apc and then into the 8.5 X 6-7-8 pylon props to find what the engine muffler / airframe combo likes best. It seem that every motor of the same manufacturer will like a little different prop, or it can just be different weather conditions. Am curious about the Lazer arrow. Let us know how it goes with this combo.
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Old 12-06-2005, 01:52 PM
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Default RE: Webra .32 Prop Size?

I would start with a 9x6 till its trimmed, than try 8x7 or even 8x8.

APC of course.
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Old 12-06-2005, 01:52 PM
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Default RE: Webra .32 Prop Size?

I would start with a 9x6 till its trimmed, than try 8x7 or even 8x8.

APC of course.
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Old 12-06-2005, 02:13 PM
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ArthurD
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Default RE: Webra .32 Prop Size?

Thanks for all the suggestions. Just happen to have every size mentioned. The engine was used with a 10X4 on a Magic so I never got experiance in the speed configuration.

I'll keep you posted on how it works out. It's ready for first flight now. A well made kit, balance was easy and looks good. May try retracts later; I hate hand launching.
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Old 12-06-2005, 04:17 PM
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Default RE: Webra .32 Prop Size?

For a first flight, using the 10x4 would not be a bad idea. It will help give you pull out on take off and keep the speed down till you get her trimmed and the throws how you like them.

Experiment after that.
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Old 12-06-2005, 05:10 PM
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ArthurD
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Default RE: Webra .32 Prop Size?

Good idea on the 10x4. Using a 8x8 it's turning 16,400 static with good sound and throttle response. That should put it at about 18,800 in the air. Sound about right for a Webra .32? I'd love to send a picture but can't figure out how.
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