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msalkeld(at)hotmail.com Guest
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Posted: Sat Feb 23, 2008 6:07 pm Post subject: CJ-6 panel |
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On the CJ's belly, not too far from the emergency air bottle drain access, is a small hinged panel, dzus'd on. When opened theres no access to anything, but on the back of it is another dzus that can be used to hold the panel open. I'm suspecting it's to deal with exhaust gases and the low pressure area in the cockpit.... Any thoughts on this?
Matt Salkeld
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dougsappllc(at)gmail.com Guest
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Posted: Mon Feb 25, 2008 10:49 am Post subject: CJ-6 panel |
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Matt,
You are exactly right, opening this panel will cause a venturi effect which will pull air/gases out of the cockpit. But, you should remember that when in flight the cockpit is already lower in pressure than is the air and gasses flowing over the fuse and canopies. By opening the panel you will lower the pressure in the cockpit even more, which will draw in even more gasses. The only way IMHO to beat the problem of gasses in the cockpit, and yes this horse has been whipped to death already, is to pressurize the cockpit to a pressure equal to or exceeding the outside pressure. Yes, you could open the vents and crack the canopy a bit to "air wash" the pilots with blast air, this works to a degree,(pun intended) but is not a healthy alternative up here in the frozen north. I think the installation of a good exhaust system which incorporates a cabin heater with the option of heated air or unheated blast air is the only civilized way to solve the problem. The Yak 52, Yak 18T, or perhaps some of the newer slip joint stainless steel systems have this option. The Yak 18T system is in my mind the best option, as it fits the CJ6 lower cowl cut outs perfectly. The Yak 52 system while it has basically the same heater as a Yak 18T system will not align properly with the existing "exhaust out" holes in the lower cowl, causing a huge butcher job to move the holes to the proper location. The Yak 52 or the Yak 18T section which contains the cabin heater can be modified to fit the 285 hp system by changing the exhaust nut and rewelding the exit pipe to the proper angle, not easy but it can be done.
Hope all this helps,
On Sat, Feb 23, 2008 at 6:03 PM, matt salkeld <msalkeld(at)hotmail.com (msalkeld(at)hotmail.com)> wrote:
Quote: | On the CJ's belly, not too far from the emergency air bottle drain access, is a small hinged panel, dzus'd on. When opened theres no access to anything, but on the back of it is another dzus that can be used to hold the panel open. I'm suspecting it's to deal with exhaust gases and the low pressure area in the cockpit.... Any thoughts on this?
Matt Salkeld
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Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644 [quote][b]
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dsavarese(at)elmore.rr.co Guest
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