Hi Peter:
Will get the pictures taken later today but have to get to a meeting first.
cheers,
Peter
on 04/1/25 7:45 AM, Peter Davis at pm.davis@ntlworld.com wrote:
>
> Hi Peter,
>
> Your setup sounds very interesting and efficient. Would you have any photos
> available? I too was thinking of using just under cowl air and I am pleased
> to hear that the temperature from the heat exchanger is not very high as I
> cut this off as soon as I got my replacement stainless system!
>
> Regards,
>
> Peter
>
> mailto:pm.davis@ntlworld.com
>
> This message has been scanned by Norton Internet Security for all known
> viruses.
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com]On Behalf Of Christine
> and Peter Timm
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Carb Heat
>
>
> <cptimm@telus.net>
>
> For what it's worth, I have not put the NACA vent for the cold air plenum
> into the top cowling, but have installed such a vent with a 3" stub glassed
> into the cowling on the right lower side. From there a 3" scat tube takes
> the ram air into a bell-shaped auxiliary airbox bolted on top of the plenum
> chamber, which has two bowden-cable operated aluminum flap valves, connected
> to each other with a straight rod on the inside opposite each other.
>
> The right side opening has a 3" stub for the Scat Tube for the cold air
> whereas the left side flap valve opens up into the inside of the cowling for
> carb heat. When one side is open, the other one is closed. I used to have a
> Scat Tube from the original heat exchanger on the exhaust leading into the
> carb heat side of this box, but found the temperature under the cowling to
> be much higher. I cut the heat exchanger off, saving weight and clutter. The
> auxiliary air box is made of fiber-glass laid up over a foam plug and has a
> flat flange around the open bottom for mounting on top of the plenum box.
> Come to think of it, I actually made the lay-up on top of the plenum box
> with the filter in place and a 1" wrap-around lip under the front of the
> plenum box. I also manufactured a 3" x 2" Y and fit it into the 3" Scat
> Tube, to supply cold air to two ball vents in the low center of the
> instrument module with a 2" tube.
>
> All these mods. work extremely well in our climate and we have crossed the
> Canadian Rockies 6 times, and have flown from Vancouver to the Atlantic and
> back, encountering all kinds of conditions.
>
> Peter Timm,U.K. 110
>
> Europa Classic Mono (upgraded to XS standard), 200 hrs, Rotax 912 S
>
> Hi all,
>
> Installation - 80hp 912 in 'Classic' airframe with cold air plenum. Has
> anyone worked up a carb hot air system taking warm under-cowl air into the
> carbs when required at the same time as blocking off the cold air delivery
> through the air filter?
>
> I am working on such a system - subjec to PFA approval - but don't want to
> re-invent the wheel if someone has already gone down this path.
>
> I know it sounds like I'm reverting to 40s technology but I don't have room
> for the Rotax system (only 10mm between rear of air box and firewall) and
> anyway, I love a challenge!
>
> Regards,
>
> Peter
>
> mailto:pm.davis@ntlworld.com
>
> This message has been scanned by Norton Internet Security for all known
> viruses.
>
>
> --
> Cheers,
> Chris
>
>
>
>
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