Greg,
The "exhaust exit out the side" should look really cool, but will certainly add drag to your airframe. I didn't do this because my door is on the left and I didn't want to risk asphyxiating myself and my pax. My DNA muffler exits out the left tunnel and just about fills the tunnel. I'm considering adding some louvers on the left side cowl for the oil cooler exit air. I think it would really help with the oil temps, maybe enough to allow removal of the oil-to-water exchanger. It would also provide additional flow for the water radiator. But, as I stated above, it will add to my cooling drag. Then again, maybe I should just leave things alone.
Mark
On Mon, Mar 9, 2009 at 10:36 AM, Greg Ward <gregw@onestopdesign.biz> wrote:
Hey Mark;
Yeah, it's a Legacy, and to flip it over, we have to wheel it outside, and crank the rotisserie as high as it will go, lotta' fun. As to the turbo and exhaust, they occupy the whole lower left area of the cowl, and exit directly out the side, and as I said below, we are leaving the stock exhaust bubbles in the lower cowl intact for heat to exit. Tests will tell how effective this is.
Greg Ward
----- Original Message -----
Sent: Monday, March 09, 2009 5:18 AM
Subject: [FlyRotary] Re: Fw: [FlyRotary] progress on N178RG
Greg,
That is a cool looking scoop. I'm looking forward to seeing the side profile. This is a Lancair Legacy, correct? (BTW, how do you flip it over inside the garage?)
One comment... don't underestimate the heat generated by the 20B exhaust. I think one of the big benefits of having the radiator inside the cowl is that the airflow helps to cool the white-hot exhaust. Without that airflow, you risk melting anything within sight of the exhaust.
Mark S.
On Sun, Mar 8, 2009 at 9:10 PM, Greg Ward <gregw@onestopdesign.biz> wrote:
----- Original Message -----
Sent: Sunday, March 08, 2009 7:06 PM
Subject: Re: [FlyRotary] progress on N178RG
A few shots of our cooling system finally mounted as far as the firewall. The two 1-1/2" cooling lines will be covered with 3" 1/2 round plastic covers, 2" smaller in diameter than the exhaust outlets on the cowling, which will continue to let heat from the engine exit. You can't see the oil cooler, as it is mounted inside the scoop, in a similiar fashion as the P-51.
We are awaiting final engine dyno tests, and then we can mate the whole mess up, and start on the next phase.
Greg Ward;
Lancair 20B N178RG in progress
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