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Dale,
I actually have 2 armpit scoops, one one each side. One supplies cool air to the intercooler, and the other supplies air to a heater core. I run coolant through the heater core all the time,to use it as an auxillary radiator. Kind of small, but I sure that it dissipates some heat.
I hadn't really considered the effects of the armpit scoop air dumping into the cowling, but I'm sure that it does have some effect.
I have a fairly large exit area, but the prop is also in that area. I have considered installing some sort of louvered grills in the top of the cowling to aid in air exiting, and also help get rid of heat after shut down. I seem to remember someone mentioning that Van's had some at a resonable price. I'll have to check into it further.
The Cozy has allot of room to work with under the cowling. I have tons of room on each side, and towrad the wing roots. My problem right now ids the weight. The turbo rotary installation ended up to be a little heavier than I would like. I plan on buying another engine to rebuild, and I very well may port it to get the horsepower and just go normally aspirated. I realize that the muffler will add some weight, but getting rid of the turbo, and intercooler would still save a good 40 lbs, I think. That project will be a year or so away. I plan on flying what I have, and will work toward the next revision. I'll build new cowling at the same time to make them more streamlined and lighter. My cowling was for the Lycoming, and I modified them twice for the rotary. Between the 2, they probably weigh 20 lbs more than they could, especially if I use carbom fiber.
Steve Brooks
-----Original message-----
From: Dale Rogers rogersda@cox.net
Date: Sat, 3 Jul 2004 21:07:59 -0400
To: "Rotary motors in aircraft" flyrotary@lancaironline.net
Subject: [FlyRotary] Re: Temps finally down
Thanks for the photos, Steve.
As is often the case, the pics generated more questions.
In the second photo IMAGE006.jpg, is that an armpit scoop just under the main spar? If so, what does it feed. Seems like is could be aggrevating your cooling problem if it just dumps inside the cowling, like to cool the fuel pumps.
The reason is that it's putting pressure on the backside of the heat exchangers negating some of the pressure differential that would encourage air to flow through them.
I'd suspect that you'd befit from re-evaluating the size of your cowl _outlet_, to be sure that all the air going in has an easy time getting out.
Other than that, it looks like a very clean installation.
The last photo was far more helpful than you might have thought. I'm building a test stand firewall, and your photo has given me a much better picture than I've had before of the space available.
Again, Thanks.
Dale R.
COZY MkIV-R13B
> From: "Steve Brooks" <steve@tsisp.com>
> Date: 2004/07/02 Fri AM 08:10:48 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: Temps finally down
> > Dale,
> Sorry that it took so long to get the pictures, but I had to make an
> unexpected trip out of town. Attached are 2 pictures of the add-on scoop,
> and also an early picture during construction which shows the placement of
> the radiator and oil cooler. There is a fiberglass shroud that is formed
> around the radiator/oil cooler, and seals against the bottom cowling to form
> the air duct. Hard to get a picture of that.
> > Steve Brooks
> > > -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
> Behalf Of Dale Rogers
> Sent: Wednesday, June 30, 2004 10:21 AM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Temps finally down
> > > > I made my eight flight today, and I'm happy to report that my inlet
> scoop
> > > augmentation on the Cozy did the trick.Excellent, Steve.
> > Lets have pictures of what worked.
> > Yes, please.
> > (*pretty* please?)
> > Dale R.
> > > > >> Homepage: http://www.flyrotary.com/
> >> Archive: http://lancaironline.net/lists/flyrotary/List.html
> >
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