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

Pusher props

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Old 07-26-2009, 05:49 AM
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molo_30
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Default Pusher props


Hi guys, I have a Keecat 65 that has a ST75 on board with a 12 x 6 3 blade pusher prop. Screams its head of and hardly goes anywhere.

I have looked high and low for a different prop. Does anyone know where I can get a 3 blade around the 11 x 8 or 11 x 9 pusher?

Thanks.
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Old 07-26-2009, 08:34 AM
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Default RE: Pusher props

Get rid of the 3-blade. It will slow you down unless it is designed to match the engine/airframe combination.

A standard 2-blade 12x6P or 11x8P will work well on that engine. You want to get the rpm up a bit - allow the engien to do its job.

Look at what is available from Graupner, APC

http://www.hobby-lobby.com/11x8_prop_left_382_prd1.htm

APC makes a 13x6 pusher that will work well on the ST75. You can trim the diameter down to about 12" to get the rpm and speed up just a touch.

Zinger makes the widest range of pusher props out there...
http://www.zingerpropeller.com/Pusher.htm
You may want to try their 12x6 pusher prop on the ST75
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Old 07-26-2009, 07:27 PM
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snappa
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Default RE: Pusher props

whats the best muffler solution for a pusher? normal muff will not work
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Old 07-26-2009, 09:46 PM
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Default RE: Pusher props

Thanks Bob, as for muffler I have put a bison pitts style muffler on it. Or you could contact weston uk and get one of their pusher tuned pipes.
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Old 07-27-2009, 05:29 AM
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Default RE: Pusher props


ORIGINAL: snappa

whats the best muffler solution for a pusher? normal muff will not work
Pusher type Jett-Stream tuned muffler - see here:

[center]http://www.rcuniverse.com/forum/fb.asp?m=8073673



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Old 07-27-2009, 07:15 AM
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Default RE: Pusher props

There are more makers of special mufflers and tuned pipes for pusher applications:

MERKER Modellbau (see gold coloured tuned pipe below):
http://www.merker-modellbau.de/schalldaempfer.htm
http://www.merker-modellbau.de/impeller.htm


SIMON Modellbau:
http://www.simon-modell.de/


WestonUK (Genesis tuned mufflers or mini pipes):
http://www.westonuk.co.uk/index_161.htm
http://www.westonuk.co.uk/index_090.htm



JETT Engineering USA (Jett-Stream tuned muffler)
http://www.jettengineering.com/accy/jettstream.html


All of these pipe makers do offer custom made solutions too. [8D]
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