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Don,
I have a couple of data points that my help with radiador sizing. My
supercharged renesis is cooling about 250 hp on take-off. Net HP after
drive and heat loss is about 230 hp. I have 780 cubic inches of dual
pass radiador. Up until this week all of the oil heat was being
transferd to the water after the radiadors with an oil to water
exchanger. The oil heat raises my water temp by 16F. My oil to water
exchanger is limited to 43F oil transfer so I just added a half size oil
to air cooler. Oil pan temps are maxing out at 260F. My radiator duct
opening is about 26% of core face. Water climb temps with OAT between 70
and 80F are around 185F. So if you add another 20F to OAT my climb temps
should be about 205F without the new mini oil cooler. I hope to get
another 25F drop in my oil temps with the latest 5 pound weight gain. My
cruise water temps are down around 160F.
Bobby Hughes
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Don Walker
Sent: Wednesday, March 24, 2010 3:23 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Turbo Plans Reply1
Jeff and Al G.
I know that one way to make things work better is to send the prop back
to Craig and have him modify it. Yet, I want more power and the target
max RPM is 7500. Plus I need more cooling. I'm maxed out on a 60
degree day, so it's time to do it all. Plus, some of my stuff is a
little bit less than professional (intake manifold) and I can take care
of that too.
David.
Thanks for the clarification on the radiator size and the hose sizes. Yes, I need the space. So a radiator of about 3x18x22 would fit better
and be about the right size? Is the 16 and 20 AN16 and An20? I'll get
a slightly bigger intercooler than the stock 91 RX-7. Must keep
detonation away, must keep detonation away, must ....... I really like
my Hushpower 2 Mine is the quietest airplane around by far. Just
trying for less weight. Thanks for the heat sheild info, based on your extensive experience. And SS is a bitch to work with! George, I'll talk with Burns about what they have seen with the turborotary guys
Chris, No porting. Just a stock 2004 grey market engine build up by
Bruce T. I'll look into the preformance 46mm. I'll probably stay with the dry
turbo.
Mark,
I remember Lynn's posting about 160 degrees being optimal and that's one
of the issues.
Tracy
Thanks for the overlap info. I'll copy one of the "log" headers used by
the after market turbo kits. This will make it MUCH easier!
Ed,
Looked at all that and tried in all. Had fun doing it too! Still needs more cooling and I want more power. Besides, building is often
fun!
Don Walker
N113BR
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