Ken Powell wrote:

Paul,
Just a quick note to let you know what I have been doing Ref. the
Peripheral Port project.  This is for a NA engine.
1.  I can't decide whether to go with 1.75" or 2" ID.  I am really
leaning toward 1.75" because:
   a.  My goal for HP is ~190 to 200
   b.  I want higher intake velocites to aid atomization and idle
quality.
   c.  the idle should be better with the smaller ID; I am concerned
about idle during the landing task per Allan Tolle - it has got to idle
well due to the large pitch fixed prop I will be using.
   d.  The port timing for the smaller port can be a little more
conservative, which should also help the idle qualities.  This should
also help BSFC.

2.  I am also researching port timing.  I have never seen this in print,
but I believe that wankel port timing will act much like a 2-stroke; if
this is true, the comment in item 'd' above about BSFC can be quite
dramatic.  Paul Yaw has some good info on his Web site.

3.  I picked out my best rotor housings this weekend and removed the
'exhaust splitter' from 1 of them.  This was a real bitch and took about
2 hours.  I will follow up on this note next week and explain what I
discovered.

Thanks,
Ken Powell

Ken how did you get that exhaust splitter out of there? I have not tried yet on
mine. 

OK will go with the 1.75. Do you want to send me shafts and butterflies
along with the hosuings? Will the Kinsler throttle arms fit?

I have some data from Mazda on PP timings. Here it is.

Paul Lamar
 
The Aircraft Rotary Engine Newsletter.              Powered by Linux.

http://home.earthlink.net/~rotaryeng/            http://www.linux.org