Mailing List flyrotary@lancaironline.net Message #38590
From: Al Gietzen <ALVentures@cox.net>
Subject: RE: [FlyRotary] Re: Oil cooler inlet
Date: Fri, 20 Jul 2007 17:20:20 -0800
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>

Thanks, TJ.  Back to Black – below:

In deciding where to put the VGs, I looked at things with the gear up (Photo 1).  The gear door has a bump, and there is some gap around the door.  Don't know what all this does to BL.  Ended up putting VG toward the left side about 26" in font of scoop, and toward the right side right on the gear door bump.

 

Seeing your gear leg/wheel fairing I am afraid that your BL will be rather though to "repair".

If the impression is not wrong, the wheelfairing alone shadows about 1/2 of the inlet....

 

With the wheel fairing in the way (and as it is, it will produce some vortex at the edge where the tire is visible ....) I predict that you have some rather serious vortex causing trouble at least for half the intake...

 

 

 

Recommend to to bend  like in rev-01. All the way closed you will give away. I would start to keep at least 1/4" off the core in the corner...

 

Oh, the price of innovation J.

You are going to miss this once you dialed in!

Not a chance!  The innovation was putting the cooler in the wing root – the price is having to do all this back-fitting.

 

I think the photo exaggerates the effect of the gear door cover.  The bump only extends less than 1 ½” below the surface, and is nice and smooth and round.  The reflections on its surface make it look different, and the gear door is silver (matches the bottom when the gear is down, and the under surface is white.  And it is about a 18” in front of the scoop. I expect the flow bends a bit going around and over, but likely stays attached.  Don’t know what happens at the end where the wheel is exposed, but that falls outside the outer end of the scoop, though some turbulence may affect the outer end of the scoop.

 

Al

 

Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster