Thanks for the advise Tracy. I also want to ship the EC/EM to you for updates. 

I'll be away to Orlando the whole next week and it is a good time for me to do 

the updates, if it's OK with you.

Thanks.

Buly

> 

> From: "Tracy Crook" <lors01@msn.com>

> Date: 2007/04/30 Mon AM 09:18:53 EST

> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>

> Subject: [FlyRotary] Re: Throttle body size/ other "Paul" issues

> 

> I doubt that a larger TB will do any better Buly.  That's about the same size 

I have on my Renesis engine and it is very well matched.  Several other builders 

have installed monster sized TBs on Paul's advice and found no improvement and 

in some cases less power.   Contrary to his usual philosophy, bigger is not 

necessarily better. 

> 

>    Here's a simple test you can do to remove the 'opinion factor' out of this 

discussion.  If your manifold pressure at WOT is the same as ambient barometric 

pressure (at low altitude), there is nothing a larger TB will do to improve it.  

If MP is less than ambient, start looking at your intake path factors like 

inlet, SCAT tubing (if used), air filter, and anything else in the air path.  If 

none of these are the limiting factor, then and only then should you think about 

going to a larger TB.

> 

> I'm using a 70mm TB on my 20B which I think is about the minimum size for the 

300 HP I expect.  It should give good linear throttle response without the "dead 

travel" of an overly large TB.  I'm betting it will pass the MP test mentioned 

above although I haven't had a chance to test it in flight yet.

> 

> On another topic, Paul has been spreading the story that the EC2 will not work 

with a CS or variable pitch prop.   After hearing this, one builder immediately 

put his EC2 up for sale without even asking me if this were true.  That's 

incredible to me but a testament to the blind faith that some people put in 

Paul's opinion.   Simply put, Paul's claim is pure nonsense.  

> 

> The same applies to his warning to never use anything but Mazda factory apex 

seals, a thinly veiled negative reference to the "RA Seals" that Bruce 

Turrentine and I collaborated on.  (Full disclosure: Bruce did the major part in 

their development, I merely offered advice from time to time).  

> 

> After years of listening to Paul's claim that my cooling system is not 

suitable, marginal at best, will not work out west where there are mountains, 

etc, etc,   I declined his offer to market his new book "How to Cool Your 

Wankel".  Much of it is valid data from a number of sources but I simply do not 

agree with his conclusions on how to apply it.  I expect an up-tic in his 

vitriol : )

> 

> Tracy Crook

>   ----- Original Message ----- 

>   From: Bulent Aliev<mailto:atlasyts@bellsouth.net> 

>   To: Rotary motors in aircraft<mailto:flyrotary@lancaironline.net> 

>   Sent: Sunday, April 29, 2007 6:05 PM

>   Subject: [FlyRotary] Throttle body size

> 

> 

>   I originally planned and tried TA set up on my Cosmo 13B. Soon after  

>   the first few flights removed the turbo and vent NA. At the time did  

>   not pay much attention on the throttle body size, counting on the  

>   turbo to make up for any losses. Today I measured the inside opening  

>   of the TB and was surprised to find it was only 60mm. This is rather  

>   small. Paul Lamar on his visit also said I should get a bigger one. I  

>   wander what size TB other people are using, or any comments and  

>   suggestions on the matter will be helpful.

> 

>   Buly

> 

> 

> 

> 

> 

>   --

>   Homepage:  http://www.flyrotary.com/<http://www.flyrotary.com/>

>   Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html<http://mail.lancaironline.net:81/lists/flyrotary/List.html>

> 

> 





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