Date: Sun, 04 Jul 2004 08:37:39 -0400
From: Steve Brooks <steve@tsisp.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [FlyRotary] Re: Temps finally down
Message-ID: <ed6eae67d7fc84db6abb077e351563fd@tsisp.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit

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
>  > 
>  > 
>