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Old 02-15-2006, 08:52 PM
Eccentric's Avatar
Eccentric Eccentric is offline
Over 650 rotary hours
Join Date: May 2004
Location: McMinnville Oregon USA
Posts: 66

Originally Posted by Joe Berki
I would like to P port the rotary but not only will the heat be a problem but the larger prop may have clearance issues.
Generally, diameter is determined by clearance and operating RPM (keep tip speed below 800 fps). Pitch determines the speed at that RPM. HP is absorbed by the chord of the blades. If you have low power you have few (2 or 3) narrow chord blades. If you have lots of power you might have 4 or 5 blades or wider chord blades.

I want to P Port mine next time I do an engine swap.
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Old 02-15-2006, 11:24 PM
athomp58 athomp58 is offline
Aubrey T
Join Date: Jul 2004
Location: Wilmington, North Carolina 28405
Posts: 11

If you talk with Tom get particulars like:
Model # of supercharger
belt drive ratio to supercharger
manifold pressure and engine RPM at 275hp
is engine ported?
PSRU ratio
prop size, pitch, and brand
what ECU is he using?

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Old 02-20-2006, 10:12 AM
BLUE MAX's Avatar
BLUE MAX BLUE MAX is offline
Long EZ
Join Date: Mar 2005
Location: Aldan, PA
Posts: 70
Default Scoop Configuration

Talked to Tom on Friday and I requested some pictures of his cooling configurations. I also asked for performance numbers. He will email me them as he compiles them.

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Tom McCormick
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Old 02-20-2006, 02:17 PM
Nathan Gifford Nathan Gifford is offline
Nathan Gifford
Join Date: Oct 2004
Location: Tickfaw, LA
Posts: 897

It looks like the left and right scoops are different sizes. Does that cause any yawing problems?
Nathan Gifford
Tickfaw, LA USA
Cozy Mk IV Plans Set 1330
Better Still --> Chapter 9
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Old 03-04-2006, 05:03 PM
dpaton's Avatar
dpaton dpaton is offline
Future Cozy Driver
Join Date: Oct 2005
Location: Streamwood, Iiilnois
Posts: 259

Originally Posted by Joe Berki
That was probably Drybread's gear. He lost his life when the canard departed the Berkut he was testing. He is missed.
Indeed. The old web page is still up, probably because no one ever took it down:

This is not a sig. This is a duck. Quack.
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