Today's Message Index:
----------------------
1. 07:05 AM - Re: Firewall foreward cooling air needs (Michael T. Ice)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Firewall foreward cooling air needs |
Ralph,
I took the time to look at Vetterman's web site. Damn fine product.
Build on.
Mike
----- Original Message -----
From: "Ralph E. Capen" <recapen@earthlink.net>
Sent: Tuesday, February 26, 2008 6:12 AM
Subject: Re: LycomingEngines-List: Firewall foreward cooling air needs
> <recapen@earthlink.net>
>
> Mike,
>
> Thanks for your response.
>
> My heater/mufflers are made by Aircraft Exhaust Technologies for Larry
> Vetterman's systems. When they're not heating the cabin, the heated air
> flows out the valve dump. The requirement is that they always have to
> have air flowing over them and they can't be run in series. I've read
> that they do provide plenty of heat.
>
> Sorry for the confusion - I think I will be OK with the setup.
>
> Ralph
>
> -----Original Message-----
>>From: "Michael T. Ice" <aurbo@ak.net>
>>Sent: Feb 26, 2008 9:22 AM
>>To: lycomingengines-list@matronics.com
>>Subject: Re: LycomingEngines-List: Firewall foreward cooling air needs
>>
>><aurbo@ak.net>
>>
>>Ralph,
>>
>>I agree with Dale. I just installed two of those Van's type heat muffs and
>>they did not have any internal baffles. The outlet air does have a plate
>>in
>>it with a bunch of small holes punched in it. I suppose that is to slow
>>the
>>air down a little so it will have a chance to get warm.
>>
>>I have heard that it is best to install the muff with the inlet air the
>>farthest down on the pipe and the outlet air up. I guess because heated
>>air
>>rises, Maybe??
>>
>>I installed two power port outlets (cigarette lighters) in the airplane so
>>the wife and I can wear electrically heated vests. I want to be warm and I
>>have never been too impressed with aircraft heaters. Even in the summer it
>>gets cold in Alaska especially at altitude.
>>
>>Mike
>>
>>----- Original Message -----
>>From: "Ralph E. Capen" <recapen@earthlink.net>
>>To: <lycomingengines-list@matronics.com>
>>Sent: Tuesday, February 26, 2008 3:35 AM
>>Subject: Re: LycomingEngines-List: Firewall foreward cooling air needs
>>
>>
>>> <recapen@earthlink.net>
>>>
>>> I actually do want them hot. I'm just going with what Larry Vetterman
>>> provided me - 'constant individual cooling air'.
>>> If I don't get enough heat, I'll consider the SS Scrubbies or a wire
>>> wrap
>>> coil.
>>>
>>> It's an older (small-tail) 6A.
>>>
>>> I'll check out Doug's area.....
>>>
>>> -----Original Message-----
>>>>From: "Michael T. Ice" <aurbo@ak.net>
>>>>Sent: Feb 25, 2008 11:19 PM
>>>>To: lycomingengines-list@matronics.com
>>>>Subject: Re: LycomingEngines-List: Firewall foreward cooling air needs
>>>>
>>>><aurbo@ak.net>
>>>>
>>>>Ralph,
>>>>
>>>>Hmm! Perhaps I am not quite understanding this but don't you want the
>>>>heat
>>>>muffs to be hot. From what I have heard getting any heat into an RV (I
>>>>don't
>>>>know what your building) is hard enough to do.
>>>>
>>>>I am glad you like your decision with the James cowl and plenum. A
>>>>friend
>>>>with an RV-9A went the same route as you and is very happy with the set
>>>>up.
>>>>
>>>>Not much activity on this message group. You might have better luck on
>>>>Van's
>>>>Air Force web site, http://www.vansairforce.net/. There is always lots
>>>>going
>>>>on that site, check out this link,
>>>>http://www.vansairforce.com/community/search.php?searchid=3368738,
>>>>
>>>>Good luck, keep building,
>>>>
>>>>Mike
>>>>----- Original Message -----
>>>>From: "Ralph E. Capen" <recapen@earthlink.net>
>>>>To: <lycomingengines-list@matronics.com>
>>>>Sent: Monday, February 25, 2008 6:20 AM
>>>>Subject: Re: LycomingEngines-List: Firewall foreward cooling air needs
>>>>
>>>>
>>>>> <recapen@earthlink.net>
>>>>>
>>>>> Mike,
>>>>>
>>>>> The way I understand it is in order to get a decent heat exchange, the
>>>>> heater box metal is slightly thinner - coupled with the fact that it
>>>>> is
>>>>> a
>>>>> muffler internally means that it will get pretty hot. This also
>>>>> eliminates using preheated air as an option.
>>>>>
>>>>> I really like the Sam James cowl. I am still installing the plenum -
>>>>> it's
>>>>> not fitting nearly as well as the cowl.....too wide in the front, too
>>>>> short in the back. I started with Vans baffle kit - but that doesn't
>>>>> account for the variances - I was able to adapt the inlet ramps to the
>>>>> plenum intakes though....but it took a bunch of work.
>>>>>
>>>>> Ralph
>>>>>
>>>>> -----Original Message-----
>>>>>>From: "Michael T. Ice" <aurbo@ak.net>
>>>>>>Sent: Feb 25, 2008 9:45 AM
>>>>>>To: lycomingengines-list@matronics.com
>>>>>>Subject: Re: LycomingEngines-List: Firewall foreward cooling air needs
>>>>>>
>>>>>><aurbo@ak.net>
>>>>>>
>>>>>>Ralph,
>>>>>>
>>>>>>I did not know that the heat muffs required cooling air flowing over
>>>>>>(through?) them at all times. Why is that?
>>>>>>
>>>>>>I just installed my carb heat yesterday and I used another one of
>>>>>>Van's
>>>>>>heat
>>>>>>muffs instead of the standard issue carb heat gizmo. I elected to get
>>>>>>the
>>>>>>carb heat air from inside the cowl instead of cutting another hole for
>>>>>>it
>>>>>>in
>>>>>>the air inlet ramp. That is the way Cessna and the standard Van's carb
>>>>>>heat
>>>>>>muff does it and it seems to work just fine.
>>>>>>
>>>>>>For the air supply to the heat muff for cabin air I went even lower
>>>>>>and
>>>>>>took
>>>>>>the air from the plate right next to the cylinder fins. I and others
>>>>>>have
>>>>>>thought this is a good place because the air will be pre-warmed as
>>>>>>much
>>>>>>as
>>>>>>possible.
>>>>>>
>>>>>>How do you like that Sam James cowl?
>>>>>>
>>>>>>I had a tough time getting my Van's standard issue cowl to fit.
>>>>>>
>>>>>>Mike Ice
>>>>>>RV-9
>>>>>>firewall forward
>>>>>>----- Original Message -----
>>>>>>From: "Ralph E. Capen" <recapen@earthlink.net>
>>>>>>To: "rv-list" <rv-list@matronics.com>; "lycoming engine list"
>>>>>><lycomingengines-list@matronics.com>
>>>>>>Sent: Monday, February 25, 2008 4:58 AM
>>>>>>Subject: LycomingEngines-List: Firewall foreward cooling air needs
>>>>>>
>>>>>>
>>>>>>> <recapen@earthlink.net>
>>>>>>>
>>>>>>> Here's the setup:
>>>>>>>
>>>>>>> IO360B1F6 with CS MT prop, AFP injection, LASAR ignition, Vetterman
>>>>>>> crossover heater/mufflers in a SamJames cowled/plenum'd RV6A.
>>>>>>>
>>>>>>> I'm planning on putting the oil cooler behind the #4 cylinder with
>>>>>>> its
>>>>>>> cutout for airflow feeding the oil cooler.
>>>>>>>
>>>>>>> My heater/mufflers require cooling air over them even when they're
>>>>>>> not
>>>>>>> heating the cockpit according to Larry.
>>>>>>>
>>>>>>> I'm thinking that taking the cooling air for both heater/mufflers
>>>>>>> from
>>>>>>> the
>>>>>>> back plate behind the #2 cylinder should be OK - since I'm taking a
>>>>>>> chunk
>>>>>>> from each side.
>>>>>>>
>>>>>>> Is this a valid thought? - or does it not matter since I have a
>>>>>>> plenum.
>>>>>>> For the cabin heat air, would it be better to take the air from the
>>>>>>> vertical plate or the 40 degree angled plate below it?
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Ralph
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>>
>>
>
>
>
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|