|
|
I'm close to Houston. I guess I would be a long way away then. Guess I forgot you moved.
I was kind of having the feeling that it would be better to go ahead with the turbo setup. The cars I've built in the past I've always found it best to do it rightthe first time is best. It may cost a bit extra in the begining, but saves tons of time and money in the long run.
My plane is also a Cozy MK-IV, and yes it is a Cosmo. Are you saying that the cosmo is going to require more cooling than a standard 13B? I am sure that with the turbo and the high compression rotors it will be putting out lots of heat. I do have one of the 3rd gen oil coolers that I can use for trial fitting, I guess I need to look for another one. I have been thinking of suplimental cooling via electric fans for oil and coolant.
Maybe this is a question for the CA list, but do you know of any one running cowl flaps to exhaust the heat from the engine?
On your turbo setup, did you go with the ceramic bearing option?
What about the turbine wheel F1 62, 65 or 68?
What about compressor trim 50 (2.122/3.000) or the Super 50 (2.122/3.200)?
Are you still running a stock intercooler or did you end up upgrading?
David Moyer
On Jan 24, 2009, at 7:26 PM, John Slade <sladerj@sbcglobal.net> wrote:
I'm not sure where you are, David, but I'd guess that you'd have to go up, not down to pay a visit. I moved to Connecticut. The plane is based at KWST, (Westerly, RI.)
>Unless some one can give me a good reason to just go for it.
My thoughts on that were that a turbo and non turbo installation are sufficiently different that converting would involve more effort than just doing it right the first time. To get an NA install running properly you need to pay a lot of attention to ram air and intake optimization, and you need to come up with some sort of muffler. Obviously the turbo doesn't need ram air, so your intake arrangement can be dedicated to cooling, and the turbo acts as a pretty good muffler. Exhaust augmented cooling can be arranged with either, but they'd be different.
Why not set up for the turbo, but limit the boost to something really low - like 5 psi - then gradually increase the boost?
On the oil cooler, a few people have had trouble with aftermarket coolers not taking the pressure. I went with two 3rd gen oil coolers in series. They're more square than the long thin 2nd gen. It depends on the aircraft type I guess, but these fit well either side of my plenum in the Cozy. You're going to need lots of oil cooling on that engine - It's a cosmo, right?
Regards,
John
David Moyer wrote:
Thanks for the update John. Very nice setup. I woulndn't mind coming to check out your Cozy if I get down your way. I was plannimg on going to Sun-N-Fun, but i decided to take the time and money and put it into the plane.
Glad to you got the bugs worked out and that gives a good starting point. I am probably going to get the engine going with out the turbo at first to eliminate other issues and add it later. Unless some one can give me a good reason to just go for it.
I am building the test stand for it the weekend and a mocked up firewall for trial fitting components. I am thinking of going to a beefed up oil coolercover the stock unit that Buly was running with the engine. Any thoughts?
David Moyer
On Jan 23, 2009, at 3:30 PM, John Slade <sladerj@sbcglobal.net <mailto:sladerj@sbcglobal.net>> wrote:
Hi David,
I have over 50 hours on the Turbonetics "big shaft" with no problems.
Detailed specs for the turbo are listed in paragraph "turbo homework" on my web site,
See: http://canardaviation.com/cozy/chap29h.htm
Regards,
John
/Friends don't let friends fly stock turbos
/
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html
|
|