REFLECTOR: Need for Cabin Heat at Altitude

[Brian Michalk]

Where did you get your fan, and what part number?

On 6/25/2013 12:33 PM, Ruben Creus wrote:
>
> We just did a similar thing than what is in the email below. We 
> install an squirrel cage fan, and a flap on the oil scoop. Different 
> tests show that for this magic trick to happen, there one very 
> important requirement. And that is, *_"a perfect seal_*" around the 
> flap. First, you need to build up air pressure in front of the oil 
> cooler to force the air into the radiator. Second, a bilge fan cannot 
> work under pressure, but a squirrel fan does. A *_squirrel fan_* is 
> designed to work under air pressure losing just few CFM. A bilge fan 
> will lose most of its CFM under pressure.
>
> I did a test in winter and summer, and finally installed it last week 
> in with the help of the Sebastian folks. Scott did a super detail job 
> there!  We achieved a perfect seal, and we are using a squirrel cage 
> fan with 105CFM. The results were impressive. It blows a good amount 
> of air, maybe 1/3 of what you would get with the flap open in flight, 
> but it looks to be good enough to blow a good amount of air. But 
> again, to build pressure in front of the radiator you need a perfect 
> seal. Otherwise, air will escape, no pressure will built and all the 
> effort will be a waste. Remember, _ this can only work with a squirrel 
> cage fan. A regular bilge fan cannot work under pressure._
>
> We hade in fact this Sunday a real test scenario, waiting on an 
> airport for the clearance and the clear to take off, the oil temp 
> started to go up, and there we go!!, we closed the flap and turn the 
> fan on and the oil temp started to go down. So we had in group oil 
> cooling!!! Now the question remains, will in the winter generate 
> enough recirculation heat to heat the cabin in on the ground and in 
> flight?   Our unorthodox tests of last winter say yes, but it is not 
> until now we permanently mounted the solution, so when the cold 
> weather comes back in few months I will report to the group the 
> results, but it looks very promising.
>
> Ruben
>
> ------------------------------------------------------------------------
>
> *From:*Don Johnston [mailto:numa at comcast.net]
> *Sent:* Sunday, June 23, 2013 8:24 PM
> *To:* Velocity Aircraft Owners and Builders list
> *Subject:* Re: REFLECTOR: Need for Cabin Heat at Altitude
>
> I don't know if it's going to work (since I'm not flying yet), but 
> I've created a controllable door that will block off the outside air 
> from the nose oil cooler which will allow inside cabin air to be 
> passed through the oil cooler via a blower. Effectively heating cabin 
> air instead of outside air.
>
> http://www.velocity-xl.com/blog/2008/06/14/12-3-6-nose-oil-cooler/
>
> http://www.velocity-xl.com/blog/2013/05/03/12-3-6-nose-oil-cooler-control/
>
> -Don
>
> On Sun, Jun 23, 2013 at 7:15 PM, victor delta <vdelta at pacbell.net 
> <mailto:vdelta at pacbell.net>> wrote:
>
> Looking for experiences, solutions, implementations,  ideas and 
> otherwise  for requirement to assure reasonable cabin temperature/heat 
> for passengers when flying in lower to mid flight levels ongoing.
> Especially welcome comments from those that fly their aircraft high 
> most of the time, at night and/or during winter months.
> Thanks in advance for all contributions.
> VD
>
> _______________________________________________
> To change your email address, visit 
> http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery! www.tvbf.org/gallery <http://www.tvbf.org/gallery>
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail <http://www.tvbf.org/pipermail>
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>
>
>
> _______________________________________________
> To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>
> Visit the gallery!  www.tvbf.org/gallery
> user:pw = tvbf:jamaicangoose
> Check new archives: www.tvbf.org/pipermail
> Check old archives: http://www.tvbf.org/archives/velocity/maillist.html

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20130625/8bb28271/attachment.html>