Today's Message Index:
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1. 12:57 AM - Better Cabin Heater (Carl Meek)
2. 06:44 AM - Re: Better Cabin Heater (jimpuglise@comcast.net)
Message 1
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| Subject: | Better Cabin Heater |
Hi,
Yesterday was freezing inside my Europa XS with Jabiru 3300. My wife has
now refused to fly until I rectify the situation - she wants a 20 degree
cabin!
The current cabin heater layout is:
* Opening on the cowl to provide a RAM air into the SCAT hose
* Goes through a shallow metal V that's jubilleed to a horizontal running
exhaust pipe on the left
* Goes into a on/off box with pull cable
* Goes through the firewall into a fibreglass box
* Splits into 2
* Goes to 2 ball valves above pilot and passenger footwell
I didn't measure the SCAT hose, it's something in the region of 2 or 2.5"
With the ball valves open, the airflow is pretty decent, but virtually no
detectable heat
Closing one valve completely, and the other to 20%, i can JUST detect mild
warmth.
OAT yesterday probably around 2 degrees at best, air coming out of vent
might have been 10-15 at a push with virtually no flow
It's clearly the design of the heat exchange/exhaust muff that is rubbish,
it has so little contact with the exhaust pipe.
It looks like two 5 inch long stainless pipes welded at a 15 degree angle.
The angle has then been cut away to fit over the exhaust.
So.... what to do? Can anyone recommend where I can get a ready made muff
that will perform better, or do i need to have one made?
Thanks in Advance,
Regards,
-Carl.
Message 2
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| Subject: | Re: Better Cabin Heater |
Carl-
Long shot but may be worth looking at.=C2- If your cabin is well sealed,
the positive pressure in the cabin may be preventing adequate flow.=C2- I
put a vent in my "D" panel that John Lawton recommended.=C2- You may wan
t to try something similar before rebuilding your heater.
Jim Puglise
Europa XS, Jab 3300
----- Original Message -----
From: "Carl Meek" <carlmeek@gmail.com>
Sent: Sunday, January 15, 2012 3:54:56 AM
Subject: Jabiru-List: Better Cabin Heater
Hi,
Yesterday was freezing inside my Europa XS with Jabiru 3300.=C2- My wife
has now refused to fly until I rectify the situation - she wants a 20 degre
e cabin!
The current cabin heater layout is:
* Opening on the cowl to provide a RAM air into the SCAT hose
* Goes through a shallow metal V that's jubilleed to a horizontal running e
xhaust pipe on the left
* Goes into a on/off box with pull cable
* Goes through the firewall into a fibreglass box
* Splits into 2
* Goes to 2 ball valves above pilot and passenger footwell
I didn't measure the SCAT hose, it's something in the region of 2 or 2.5"
With the ball valves open, the airflow is pretty decent, but virtually no d
etectable heat
Closing one valve completely, and the other to 20%, i can JUST detect mild
warmth.
OAT yesterday probably around 2 degrees at best, air coming out of vent mig
ht have been 10-15 at a push with virtually no flow
It's clearly the design of the heat exchange/exhaust muff that is rubbish,
it has so little contact with the exhaust pipe.
It looks like two 5 inch long stainless pipes welded at a 15 degree angle.
=C2- The angle has then been cut away to fit over the exhaust.
So.... what to do?=C2- Can anyone recommend where I can get a ready made
muff that will perform better, or do i need to have one made?
Thanks in Advance,
Regards,
-Carl.
==
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