REFLECTOR: Need for Cabin Heat at Altitude

Tue Jun 25 19:32:27 CDT 2013

Drawings here:
http://www.trans-f-air.com/media/30003161_SPEC.pdf


On 06/25/2013 07:22 PM, Jack Prock wrote:
> I'm now going to answer my own question... so someone else may benefit.
> After searching again for a 12-volt squirrel cage blower, I stumbled 
> across this:
> http://www.suremarineservice.com/008-A37.aspx
> It should work really well, it is about the right size, with 150CFM,
> and set up for 3 speeds.  12 V  @ 5 amps
> I will just have to create a mounting bracket.
> If anyone else is interested in this, it will be a few weeks before I 
> get it installed,
> but I will let you know.
> Jack
> *From:* Jack Prock <mailto:jackprock at wavecable.com>
> *Sent:* Tuesday, June 25, 2013 2:33 PM
> *To:* Velocity Aircraft Owners and Builders list 
> <mailto:reflector at tvbf.org>
> *Subject:* Re: REFLECTOR: Need for Cabin Heat at Altitude
> Yes, please give fan manufacturer, part number, and where we can buy it.
> After finding that the bilge fan that was originally discussed a few 
> years back
> just won't push air through the oil cooler, I have spent several hours 
> online
> looking for just such a fan. But, have yet to find a 12 volt, 
> reasonably compact
> fan that can do the job.
> I would be REALLY interested in receiving any information you have.
> Jack
> *From:* Brian Michalk <mailto:michalk at awpi.com>
> *Sent:* Tuesday, June 25, 2013 11:07 AM
> *To:* Velocity Aircraft Owners and Builders list 
> <mailto:reflector at tvbf.org>
> *Subject:* Re: REFLECTOR: Need for Cabin Heat at Altitude
> 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, visithttp://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
>
> ------------------------------------------------------------------------
> _______________________________________________
> 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
>
> ------------------------------------------------------------------------
> _______________________________________________
> 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
>
>
> _______________________________________________
> 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/20130625/55e0ba1b/attachment-0001.html>