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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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