Mailing List flyrotary@lancaironline.net Message #33646
From: George Lendich <lendich@optusnet.com.au>
Subject: Re: [FlyRotary] Re: [FlyRotary]Update on my project
Date: Mon, 18 Sep 2006 08:26:24 +1000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Thanks Jason,
What were the differences in performance? I've often wondered if the tuned intake provides the added performance where installation of longer intake tubes were difficult where there are severe restriction within the cowl.
George ( down under)

George,

Originally the runners where about eight inches long.

 

Jason

 

Jason,

What was the initial length of you intake manifold?

George ( down under)

 

 

Project status report

 

I recently modified my intake manifold. I added 10 inches of runner and velocity stacks. The other project was increasing the opening to my radiator. I increased the opening approx. six square inches. I also advanced the timing 3 "clicks".

 

I was able to test Thursday afternoon. Outside air temp was 94 degrees. Full power climb to 2000 msl and water temp was below 200 degrees. Reduced power to 5600rpm and water slowly come down to 185 degrees. Climbed to 8000' and did a couple of speed runs. I was able to turn the engine at 6700 rpm and that gave me 165 KTAS (Dynon). I was only able to do two runs. The numbers were consistent on both runs. My gps was showing 180kts ground speed on the second. I forgot to look on the first.  Going out this afternoon so I will keep ya'll posted.

 

Jason Hutchison     

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