Steve,
You could try using SCAT ducting to route
any unused inlets over to the water to improve the volume of air. What do
your cowl exits look like?
In order to really know how everything is
working you are going to have to fly. It will be difficult to do a full
power takeoff and then go into high speed cruise and have the cooling work perfectly
for both conditions unless you have cowl flaps or some manner of controlling
the air. I currently accept 210-220 on takeoff in order to get 180-190 in
cruise.
That plane is going to be fast! It looks
like 200K just sitting in the hangar!
What prop is that?
Bill
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]
Sent: Tuesday, November 15, 2016
3:13 AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: Cooling
Hi there Bill.
The water exchanger is ~540 cubic inch in capacity and fed from the
right cheek via a rotating trumpet shaped diffuser which in turn feeds a wedge.
The oil exchanger is a turbo RX7 unit of 190 cubic inch capacity and fed via a
trumpet/wedge diffuser fed from below the spinner.
I’ll send some pictures separately as they are together to large.
Steve,
Can you share any photos of your cooling install? Oil and water.
Bill
-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Monday, November 14, 2016 4:21 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Cooling
Hi guys.
The Glasair SIIRG is near completion and we are taxi testing.
The OAT is rising as we enter summer. Yesterday was 37C ~ 100F.
She can idle forever with water stabilising below 220F and oil below 180F if
the OAT is below 70F but not sure yet about the warmer days.
I'm wondering about 3 options and would value your experience and thoughts:
1. Route some more air from the left cheek into the water heat exchange
diffuser currently fed by the right cheek. I am currently only using 50% of
the left cheek (Blanked off). The other 50% of the left cheek feeds air to
the engine. The air is likely not to want to do the gymnastics required to
travel the path available.
2. Install another small core fed by the available left cheek air with water
from the heater outlet. This would make for easy plumping as far as the
water system. I'm not sure how much heat we could reject from that small
diameter heater outlet?
3. Install an electric fan on the main exchanger for extended on the ground
running. Main concern with fan is, what happens when cruising at up to
200Knots?
Appreciate you feedback
Steve Izett
Glasair SIIRG Genesis 4 port RD1C EC2
Perth Western
Australia
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