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N13472(at)aol.com Guest
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Posted: Mon Sep 26, 2011 2:53 pm Post subject: CJ6A - Cabin Heat/Air plumbing, diverter valves - do Yak 52 |
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Very true, But stock Cj’s (Firewall?) is Alum. so the box survives and the firewall does not.
Tom Elliott
CJ-6A NX63727
777 Quartz Ave
PMB 7004
Sandy Valley NV
89019
Cell 702-595-2680
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of doug sapp
Sent: Monday, September 26, 2011 2:06 PM
To: yak-list(at)matronics.com
Subject: Re: CJ6A - Cabin Heat/Air plumbing, diverter valves - do Yak 52 18T or other parts work?
Jay,
Most US aircraft have a stainless steel control box on the fire wall not only to control the flow of hot air but to prevent smoke in the cockpit in case of a engine fire, as your SCAT hoses will go away pretty fast. A alum box will do you little good in a engine fire situation, stainless is more expensive but is the best/safest way to go IMHO.
Best.
Doug
On Mon, Sep 26, 2011 at 1:00 PM, jay wells <bultaco956(at)yahoo.com (bultaco956(at)yahoo.com)> wrote:
Has anyone adapted or installed cabin heat or fresh air vent controls or diverter valves from a Yak 18T or 52 (or something else) on a CJ6 to provide heat and fresh air through the firewall?
For that matter does anyone have a good parts diagram showing the components of the Yak 18T or 52 cabin heat/vent system?
I have a later model CJ6 that is plumbed for cabin heat and air at the engine baffles and firewall but still has the factory caps on the firewall ducts. I have installed the 18T SS exhaust with the heat muff and on/off valve on the muff (L side) and a fresh air funnel (R side). Scat tubes can now easily connect the fresh air funnel (R side) and heater muff outlet (L side) tubes to the L & R firewall ducts – however – most western general aviation installations seem to use a firewall side hot air diverter valve or “box” so as to keep a continuous stream of cooling air blowing through the heater muff to prevent internal deterioration of the exhaust inside the muff and subsequent CO issues. It seems like the only proper position for the existing valve on the 18T SS heat muff is continuously open for cooling air -- then to a firewall mounted or inline diverter valve to vent unwanted hot air when not being used for cabin heat. The CJ’s vent & heat tubes are 40 mm (about 1 ¼ inch; so 1 ¼ or 1 ½ inch scat tubing should work). The heater boxes I have found online for RV and general aviation applications seem to use 2 inch ducting and are too big. There is plenty of room for a vent shut off valve behind the firewall but it would seem preferable to have the heat/vent shut off controls on the engine side of the firewall for obvious reasons – particularly for heat.
I would appreciate hearing from anyone who has tackled this.
It would seem possible to construct inline cable controlled diverter valves (small heat/vent boxes) out of aluminum sheet (or SS) but an off the shelf solution would be preferable.
The CJ parts manual (the standard 5 blue books) I have only shows the version of the CJ with no heat/vent ducting at all at the baffle plates and firewall and is no help.
Thanks,
Jay Wells (Stripper)
1983 CJ6A (285 HP)
Potomac Falls, VA
Bultaco956(at)yahoo.com (Bultaco956(at)yahoo.com)
Cell [url=tel:571-283-3554]571-283-3554[/url]
0123456789012345
[quote][b]
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dougsappllc(at)gmail.com Guest
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Posted: Mon Sep 26, 2011 3:44 pm Post subject: CJ6A - Cabin Heat/Air plumbing, diverter valves - do Yak 52 |
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Also true, but I'd rather have the cleanest air possible to breath while it was burning through the firewall. Having a 2 inch hole to let the smoke and fire into the cockpit does not seem the best situation. Granted a 020 alu box is better than nothing, just barely.
FYI there are a few CJ out there with stainless firewalls. The way my luck has been running I have given some thought to upgrading mine.........along with my life insurance.
Doug
On Mon, Sep 26, 2011 at 3:49 PM, Tom Elliott <N13472(at)aol.com (N13472(at)aol.com)> wrote:
[quote]
Very true, But stock Cj’s (Firewall?) is Alum. so the box survives and the firewall does not.
Tom Elliott
CJ-6A NX63727
777 Quartz Ave
PMB 7004
Sandy Valley NV
89019
Cell [url=tel:702-595-2680]702-595-2680[/url]
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of doug sapp
Sent: Monday, September 26, 2011 2:06 PM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: CJ6A - Cabin Heat/Air plumbing, diverter valves - do Yak 52 18T or other parts work?
Jay,
Most US aircraft have a stainless steel control box on the fire wall not only to control the flow of hot air but to prevent smoke in the cockpit in case of a engine fire, as your SCAT hoses will go away pretty fast. A alum box will do you little good in a engine fire situation, stainless is more expensive but is the best/safest way to go IMHO.
Best.
Doug
On Mon, Sep 26, 2011 at 1:00 PM, jay wells <bultaco956(at)yahoo.com (bultaco956(at)yahoo.com)> wrote:
Has anyone adapted or installed cabin heat or fresh air vent controls or diverter valves from a Yak 18T or 52 (or something else) on a CJ6 to provide heat and fresh air through the firewall?
For that matter does anyone have a good parts diagram showing the components of the Yak 18T or 52 cabin heat/vent system?
I have a later model CJ6 that is plumbed for cabin heat and air at the engine baffles and firewall but still has the factory caps on the firewall ducts. I have installed the 18T SS exhaust with the heat muff and on/off valve on the muff (L side) and a fresh air funnel (R side). Scat tubes can now easily connect the fresh air funnel (R side) and heater muff outlet (L side) tubes to the L & R firewall ducts – however – most western general aviation installations seem to use a firewall side hot air diverter valve or “box” so as to keep a continuous stream of cooling air blowing through the heater muff to prevent internal deterioration of the exhaust inside the muff and subsequent CO issues. It seems like the only proper position for the existing valve on the 18T SS heat muff is continuously open for cooling air -- then to a firewall mounted or inline diverter valve to vent unwanted hot air when not being used for cabin heat. The CJ’s vent & heat tubes are 40 mm (about 1 ¼ inch; so 1 ¼ or 1 ½ inch scat tubing should work). The heater boxes I have found online for RV and general aviation applications seem to use 2 inch ducting and are too big. There is plenty of room for a vent shut off valve behind the firewall but it would seem preferable to have the heat/vent shut off controls on the engine side of the firewall for obvious reasons – particularly for heat.
I would appreciate hearing from anyone who has tackled this.
It would seem possible to construct inline cable controlled diverter valves (small heat/vent boxes) out of aluminum sheet (or SS) but an off the shelf solution would be preferable.
The CJ parts manual (the standard 5 blue books) I have only shows the version of the CJ with no heat/vent ducting at all at the baffle plates and firewall and is no help.
Thanks,
Jay Wells (Stripper)
1983 CJ6A (285 HP)
Potomac Falls, VA
Bultaco956(at)yahoo.com (Bultaco956(at)yahoo.com)
Cell [url=tel:571-283-3554]571-283-3554[/url]
0123 45 67
8 90123 45
6
[b]
| - The Matronics Yak-List Email Forum - | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
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N13472(at)aol.com Guest
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Posted: Mon Sep 26, 2011 4:29 pm Post subject: CJ6A - Cabin Heat/Air plumbing, diverter valves - do Yak 52 |
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I upgrades mine with a “Borasilca cloth” ? In any case it is the fiberglass type with an alum foil (heavy) on one side to keep the oil out. Shelby Cobras and many of the Indy /
formula 1 race cars use it to keep the fiberglass body from melting / catching fire. So far (6 + years) it has held up well.
But in my opinion if you want heat go with electric under garments powered from a 24 to 12 Vdc convertor. And do not put any holes through your firewall.
Tom Elliott
CJ-6A NX63727
777 Quartz Ave
PMB 7004
Sandy Valley NV
89019
Cell 702-595-2680
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of doug sapp
Sent: Monday, September 26, 2011 4:42 PM
To: yak-list(at)matronics.com
Subject: Re: CJ6A - Cabin Heat/Air plumbing, diverter valves - do Yak 52 18T or other parts work?
Also true, but I'd rather have the cleanest air possible to breath while it was burning through the firewall. Having a 2 inch hole to let the smoke and fire into the cockpit does not seem the best situation. Granted a 020 alu box is better than nothing, just barely.
FYI there are a few CJ out there with stainless firewalls. The way my luck has been running I have given some thought to upgrading mine.........along with my life insurance.
Doug
On Mon, Sep 26, 2011 at 3:49 PM, Tom Elliott <N13472(at)aol.com (N13472(at)aol.com)> wrote:
Very true, But stock Cj’s (Firewall?) is Alum. so the box survives and the firewall does not.
Tom Elliott
CJ-6A NX63727
777 Quartz Ave
PMB 7004
Sandy Valley NV
89019
Cell [url=tel:702-595-2680]702-595-2680[/url]
From: owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com) [mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)] On Behalf Of doug sapp
Sent: Monday, September 26, 2011 2:06 PM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: CJ6A - Cabin Heat/Air plumbing, diverter valves - do Yak 52 18T or other parts work?
Jay,
Most US aircraft have a stainless steel control box on the fire wall not only to control the flow of hot air but to prevent smoke in the cockpit in case of a engine fire, as your SCAT hoses will go away pretty fast. A alum box will do you little good in a engine fire situation, stainless is more expensive but is the best/safest way to go IMHO.
Best.
Doug
On Mon, Sep 26, 2011 at 1:00 PM, jay wells <bultaco956(at)yahoo.com (bultaco956(at)yahoo.com)> wrote:
Has anyone adapted or installed cabin heat or fresh air vent controls or diverter valves from a Yak 18T or 52 (or something else) on a CJ6 to provide heat and fresh air through the firewall?
For that matter does anyone have a good parts diagram showing the components of the Yak 18T or 52 cabin heat/vent system?
I have a later model CJ6 that is plumbed for cabin heat and air at the engine baffles and firewall but still has the factory caps on the firewall ducts. I have installed the 18T SS exhaust with the heat muff and on/off valve on the muff (L side) and a fresh air funnel (R side). Scat tubes can now easily connect the fresh air funnel (R side) and heater muff outlet (L side) tubes to the L & R firewall ducts – however – most western general aviation installations seem to use a firewall side hot air diverter valve or “box” so as to keep a continuous stream of cooling air blowing through the heater muff to prevent internal deterioration of the exhaust inside the muff and subsequent CO issues. It seems like the only proper position for the existing valve on the 18T SS heat muff is continuously open for cooling air -- then to a firewall mounted or inline diverter valve to vent unwanted hot air when not being used for cabin heat. The CJ’s vent & heat tubes are 40 mm (about 1 ¼ inch; so 1 ¼ or 1 ½ inch scat tubing should work). The heater boxes I have found online for RV and general aviation applications seem to use 2 inch ducting and are too big. There is plenty of room for a vent shut off valve behind the firewall but it would seem preferable to have the heat/vent shut off controls on the engine side of the firewall for obvious reasons – particularly for heat.
I would appreciate hearing from anyone who has tackled this.
It would seem possible to construct inline cable controlled diverter valves (small heat/vent boxes) out of aluminum sheet (or SS) but an off the shelf solution would be preferable.
The CJ parts manual (the standard 5 blue books) I have only shows the version of the CJ with no heat/vent ducting at all at the baffle plates and firewall and is no help.
Thanks,
Jay Wells (Stripper)
1983 CJ6A (285 HP)
Potomac Falls, VA
Bultaco956(at)yahoo.com (Bultaco956(at)yahoo.com)
Cell [url=tel:571-283-3554]571-283-3554[/url]
01
234567
89012345678901234567
[quote][b]
| - The Matronics Yak-List Email Forum - | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Yak-List |
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