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Greg,
Another thing about the exhaust out the side…Don’t forget
that we are adding oil to the fuel. You will get some oil stains out of
the exhaust and they will look better on the bottom. :>)
Bill B
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Mark Steitle
Sent: Thursday, March 12, 2009
11:47 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Fw:
[FlyRotary] progress on N178RG
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.
On Mon, Mar 9, 2009 at 10:36 AM, Greg Ward <gregw@onestopdesign.biz> wrote:
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.
----- Original Message -----
Sent: Monday, March 09,
2009 5:18 AM
Subject: [FlyRotary] Re:
Fw: [FlyRotary] progress on N178RG
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.
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.
Lancair 20B
N178RG in progress
--
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