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Hi George, maybe you have a Chubby Cubby confused with an ultralight Cubby ... my airplane is a Wag-Aero copy of the PA-14 family cruiser, a 4-place super cub if you like. At 1300 lbs empty and with
2200 lb gross the 13B is not overkill ... se attached photo.
Jeff
From: Rotary motors in aircraft [flyrotary@lancaironline.net] On Behalf Of George Lendich [lendich@aanet.com.au]
Sent: Saturday, January 30, 2010 8:50 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Tiff to CAD Software
Jeff,
The 13B is probably way overkill for this aircraft, you must be running low RPM and the heat dissipation would be low also. Ever thought of a single rotor engine.
George ( down under)
----- Original Message -----
Sent: Sunday, January 31, 2010 3:14 AM
Subject: [FlyRotary] Re: Tiff to CAD Software
Mike, I’ve got a 13B NA, flying a “Chubby Cubby” – 110 mph airplane.
Jeff
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On Behalf Of Mike Wills
Sent: Friday, January 29, 2010 10:20 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Tiff to CAD Software
Figures I'd make a statement like that and have somebody prove me wrong. I cant remember Jeff, what airframe and what engine are you running?
Sent: Friday, January 29, 2010 2:51 PM
Subject: [FlyRotary] Re: Tiff to CAD Software
FWIW, I my radiator core is 5.5” thick x 5.5” high x 20” wide … it cools … JWW
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
On Behalf Of George Lendich
Sent: Friday, January 29, 2010 4:49 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Tiff to CAD Software
I like your approach to the problem, I see nothing but positive outcomes in proving the concept (one way or another). 3.5" is ( I believe) OK, the thick verses thin debate
is like comparing apples and oranges given the different applications of cars and aircraft. I don't know what speed your looking at in cruise but 3.5" should be good for a higher cruise. I believe some have used 3" cores successfully. However I'm no expert
but I look forward to the outcomes.
Mike,
The graphic is not a true representation of the final design. It merely depicts an unmodified P-51 scoop that has been rendered in CAD, scaled 61% and rotated
lightly in the clockwise direction.
My actual radiator design has a frontal area of 203 sq in and a depth of 3.5 in.
As stated earlier, the purpose of the post was to announce my willingness to share a software program that I had developed and found useful.
T Mann
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