flyrotary@lancaironline.net Mailing List Archive

Hi Steve, maybe also worth a look for a few ideas is Vettermans exhaust website on cooling air exit shapes vs performance he obtained, might confirm the direction in which you are leaning on the louvres. (Scroll to the bottom of the webpage to find it).

The RV crowd at Vans Air Force have some great threads on cooling and theory on proper radiusing of the inlets to slow incoming air, as was mentioned in an earlier reply, good luck with it,

Alex Molteno

On Nov 16, 2016 8:58 PM, "hoursaway1" <flyrotary@lancaironline.net> wrote:

ebay boating parts & access. David

From: "steve Izett" <flyrotary@lancaironline.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, November 16, 2016 3:30:41 AM
Subject: [FlyRotary] Re: Cooling

Hi David
That may well be what will be needed in flight. At present we have the gear door open on the ground so plenty of exit.
I’ll do a search for SS louvers in prep.

Thanks.
Steve
On 16 Nov. 2016, at 4:16 pm, hoursaway1 <flyrotary@lancaironline.net> wrote:

increase outlet size, we had some minor cooling problems our fix was adding 2, 6" X 6" SS loovers into lower cowl rear area. David Cook RV6A Rotary

From: "steve Izett" <flyrotary@lancaironline.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, November 14, 2016 5:21:04 PM
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

--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html