Mozam,
Is it possible to scavenge warm air from the top of the inspection plate on
your oil cooler. The 50 does not have a heat shroud on its 2nd section of
the exhaust on the right bank. It gets so warm inside the pit of the 50
since there is an opening at the top of my oil cooler that I had to install
an insulation blanket on the top of the cooler. It did not seem to make much
difference in the amount of CO getting into the nose by doing that though.
My cooler is mounted farther forward than the ones on the TW. My exhaust
vents parallel to the cooler not in front of the cooler like the TW's. Tim
Williams installed fins on his cooler to vent the hot exhaust away from the
cooler as I remember.
I suppose exhaust stack extensions could solve the problem too.
Anyway, if you could capture the heat off the cooler then you would not have
to reinstall the shroud.
Install a Scuba system with a stage I - II regulator connected to mil spec
O2 hose that terminates on a CRU-60 for fresh none pollute air with CO. Then
you could hook up and use that old MBU-12 Aviator's Mask you have lying
around from your glory days. Of course, you would have to get a pre-amp for
your Mil spec mic. Know where to acquire that too.
Then you do not need to worry about the concentration of CO in your pit. It
is absorbed by inhalation not by osmosis (skin contact). The problem is
having to refill or swap the tank at the end of a couple of sorties. You do
not need to breath the compressed air once airborne so you can get a couple
of sorties out of a 3500 psi fill. Or you can invest in two stage I's and
make a refill manifold. Then you could refill the tank without removing it
from the A/C.
One could also invest in a diluter demand regulator and install a LOX tank.
Problem there is the expense and the fact that you would need to maintain a
closed circuit so you would have to breath 100% O2 continuously during
start, taxi, TO, hi Alpha maneuvers, landing, taxi in, run-up and shutdown.
Otherwise drop the mask or loosen it to the end clip on the bayonet and
breath around it.
Now there is nothing wrong with breathing 100% O2 for an hour or so except
you have to remember to clear your ears frequently after such a flight to
altitude otherwise you could awaken the next morning with an ear ache from a
serous otitis.
Just a thought fresh air vs LOX and CO inhalation from TU heating shrouds.
Doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Robert Langford
Sent: Sunday, August 24, 2008 8:25 AM
To: yak-list@matronics.com
Subject: Re: Re: Yak-52 Exhaust Danger
A question I should have asked, another reason to have the detector
available for spot checks, or perhaps a Perm. installation. One has no way
of detecting just when the failure occures. An internal visual can be done
by use of a light and mirror I suppose. This should expose anything but a
crack. This of course would open as the exhaust expands from heat.
----- Original Message -----
From: "Mozam" <sdalton@hughes.net>
To: <yak-list@matronics.com>
Sent: Saturday, August 23, 2008 9:19 PM
Subject: Re: Yak-52 Exhaust Danger
>
>
> dougsappllc(at)gmail.com wrote:
>> Steve,
>> I do believe I have this Yak 52 cabin heat section in my stock, give me
>> a call on Monday.
>>
>> Also, Not saying that it has not been getting done, and not looking to
>> piss anyone off, but it is nearly a law written in stone that the shrouds
>> come off of all cabin heat muffs at every annual, just to prevent what
>> you are describing.
>>
>>
>>
>
>
> Doug,
>
> I will call you...thanks.
>
> How do you remove this shroud for inspection? It is all welded together
> and has to be cut off for inspection.
>
> -Steve
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 0201#200201
>
>
> --
> Checked by AVG.
> 6:32 PM
>
>
