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Thanks to all of you for the great input. The more
time I spend on this, the better and better this belly scoop is looking. I
think the trick will be getting the vanes and chambers designed correctly, so
that they follow the recommendations in that old WWII report and a couple of
other articles, as close as possible. Then, maybe redesigning the extra
cowls I have to see what drag reduction I can get there. Trouble is, my
math skills past a certain level suck......(:-) Time to go buy some blue
foam, and put my money where my mouth is. I will report progress as it
occurs.
Thanks;
Greg
----- Original Message -----
Sent: Sunday, March 02, 2008 6:45
AM
Subject: [FlyRotary] Hey Ed WAs :
[FlyRotary] Re: Cooling the 20B
Sorry! my mistake.
In that case, I use two GM evaporator cores 9x11x
3 1/2" providing approx 200 sq inch frontal area and 690 cubic inches of
cooling core volume (does on include side tanks). I consistently produce
175-180 HP for take off and suffer a cooling deficit if OAT>60F until
reaching 120 mph IAS or I pull back on the throttle. WOT at 8500 MSL
will drive coolant/oil temps to 190F whereas cruise (approx 5500 -5600 rpm)
gives a coolant and oil temp between 160-170 depending on altitude and
OAT. I swing a 74x88 prop using a RWS 2.85:1 gear
box.
Ed
----- Original Message -----
Sent: Saturday, March 01, 2008 9:20
PM
Subject: [FlyRotary] Re: Hey Al was Hey
Ed WAs : [FlyRotary] Re: Cooling the 20B
No, actually, I was trying to get a sense of the size
of radiator I would need. Still discussing size, and
thickness.
Greg
----- Original Message -----
Sent: Saturday, March 01, 2008 12:29
PM
Subject: [FlyRotary] Hey Al was Hey
Ed WAs : [FlyRotary] Re: Cooling the 20B
Hey Al!
I believe Greg meant this question to you as my 13B
installation with rads under the cowl is not conceptually close to
what Greg is considering
Ed
----- Original Message -----
Sent: Saturday, March 01, 2008 2:41
PM
Subject: [FlyRotary] Re: Cooling
the 20B
Hey Ed;
How thick (Dimensions) is your radiator, and what
size hoses are you running? Thinking of surface mounting the feed and
return lines, and the best way to do that.
Greg Ward
Lancair 20b in progress
----- Original Message -----
Sent: Saturday, March 01, 2008
9:55 AM
Subject: [FlyRotary] Re: Cooling
the 20B
I meant to attach
this photo of the fan installation to the previous
post.
Al
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