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From: <atlasyts@bellsouth.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Throttle body size/ other "Paul" issues
Date: Tue, 1 May 2007 12:54:58 -0500
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Thanks Lynn and Bill. That makes me feel better.
Buly
> 
> From: wrjjrs@aol.com
> Date: 2007/05/01 Tue AM 11:27:59 EST
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: Throttle body size/ other "Paul" issues
> 
> Interesting Lynn,
> For the comparison that is 2,035 square mm inlet area. Assuming the bigger 13B could use 1/3 More inlet area the total would be 2,646 square mm. The inlet area of the 65 mm  throttle body is 3,318 square mm. Seems like a 65 mm TB would be more than up to the task. A 60 mm TB is 2,827 square mm for reference. Plenty big Buly
> Bill Jepson 
>  
> -----Original Message-----
> From: lehanover@aol.com
> To: flyrotary@lancaironline.net
> Sent: Tue, 1 May 2007 9:08 AM
> Subject: [FlyRotary] Re: Throttle body size/ other "Paul" issues
> 
> 
> Two 36MM chokes is enough for 244.8 HP at 9,400 RPM, and About 176 HP at 7,000 RPM. I am in California and the dyno sheet is in Hebron Ohio. But I can quote it when I get back if it would help anyone.
> 
> Lynn E. Hanover
> 
>  
>  
> -----Original Message-----
> From: atlasyts@bellsouth.net
> To: flyrotary@lancaironline.net
> Sent: Mon, 30 Apr 2007 9:59 AM
> Subject: [FlyRotary] Re: Throttle body size/ other "Paul" issues
> 
> 
> 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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