flyrotary@lancaironline.net Mailing List Archive

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I would also be really interested in seeing some others cooling solutions. I was told that 40% of the Lancair's drag is in the cooling drag, and I am contemplating a belly scoop A la' P-51, and have created controversy about how much that configuration will add to the drag factor. In other words, I might get great cooling at a slower speed? Supposedly the P-51 configuration creates enough thrust to overcome around 90% of the drag created, but I would like to confirm that before I go through the process of designing and building the damn thing.......(:-) Call me lazy...

Greg Ward

20B Lancair in Progress

----- Original Message -----

From: Mike Wills

To: Rotary motors in aircraft

Sent: Friday, February 29, 2008 7:26 AM

Subject: [FlyRotary] Re: New (old) guy on list

Well, it's not as beautiful as it once was. Had to add some ugly bumps for exhaust clearance. Finally threw in the towel on a clean oil cooler install and added a second scoop and stock RX7 cooler below the rad inlet.

Can I attach pictures here?

At the moment it appears during full power ground runs that I have excess cooling capacity, both oil and water. Never been over 180 on either. Which brings me to thinking (again) about oil/water heat exchangers. Has anyone successfully implemented one? If so what are you using? I may eventually be able to get rid of that second scoop.

Mike

----- Original Message -----

From: Russell Duffy

To: Rotary motors in aircraft

Sent: Thursday, February 28, 2008 8:57 PM

Subject: [FlyRotary] Re: New (old) guy on list

I was on this list years ago when it first started up. Job change and other issues slowed progress on my project and I unsubscribed.

Hey, Mike's Back :-)

Good to hear from you again. Can't wait until all the new folks see that beautiful cowl :-)

Cheers,

Rusty