Mailing List flyrotary@lancaironline.net Message #33638
From: Hutchison, Jason <JHutchison2@bellhelicopter.textron.com>
Subject: RE: [FlyRotary] Re: [FlyRotary]Update on my project
Date: Sat, 16 Sep 2006 11:58:28 -0500
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>

Tracy,

 I will take some measurements tonight. I dropped the bottom of the stock(right cowl) inlet about an 1 to 1 ¼. I did verify timing marks lined up with the counter weight at the 9 o'clock position. I have not checked it with a timing light. After playing with it a little more I noticed the rpm does not change after the third click of timing advance. Static rpm changed from 4800 rpm to 53-5400 rpm.

 

Jason  

 

 

 


From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Tracy Crook
Sent: Saturday, September 16, 2006 9:13 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: [FlyRotary]Update on my project

 

Wow! That's a great improvement on water cooling Jason.  Gives me hope that my 20B will cool since my radiator & duct setup on the RV-8 is similar.  (I have the thicker version of the Griffon Rad that Jason is using) What is the total Sq in. on rad inlet now?

 

Did you ever get a ball park figure on actual running ignition timing on the 3rd gen 13B?   I'll be glad to update the software at no cost if you need more advance. 

 

Tracy

----- Original Message -----

Sent: Saturday, September 16, 2006 9:00 AM

Subject: [FlyRotary] Re: [FlyRotary]Update on my project

 

 

 

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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