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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: 295cc vs 495 cc was [FlyRotary] responses to responses, not developing full power
Date: Mon, 22 Jun 2009 19:01:59 -0400
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Sounds good to me, Bill.  As you know I prefer the injectors to be close in
flow rate - I think the potential benefits outweigh and drawbacks.  Having
all four the same, is even better in my opinion in that you only need one
size of injectors as  spare.  

More over, should you find yourself turning off one pair, the resulting
change in engine operation would be minor (unless running boost of course)

Ed

Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.rotaryaviation.com/Rotorhead%20Truth.htm

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Bill Bradburry
Sent: Monday, June 22, 2009 5:08 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 295cc vs 495 cc was [FlyRotary] responses to
responses, not developing full power

Here is the plan I am considering.  Please feel free to comment.
In light of the fact that the fuel pressure on the Renesis should be 57 lbs
in order to get the spec flow from the injectors.
I will replace the red injectors with the yellow injectors.  Looking at the
flow range shown in the manual, this will give a total flow of between
1656CCM and 1872CCM at the spec pressure of 57 psi.  At 100% duty cycle,
that should support HP of 287-324.
If I reduce the fuel pressure from 57 psi to 43 psi, that will reduce the
range of the fuel flow to 1438ccm to 1626ccm.  At a duty cycle of 85% that
will support a HP of 212-240.
Pro's:
Plenty of fuel at a fuel pressure that allows a higher GPM and lower amp
draw.  (should easily provide full power on battery voltage only and will
increase the no alternator range) 
Will allow the EC-2 secondary injector differential in Mode 6 to be
cancelled.  (this is only required? When the injectors are more than 50%
different.  They will be between 15% and 32% different depending on the
range given)  Should be able to lower the MAP table here to compensate?
Con's:
Do you have any yellow injectors?

I considered going to only yellow injectors.  This will flow the same fuel
as the stock setup, but only at the 57 psi.  The only advantage here is
cancelling the injector differential.

What say ye?  Tracy are you gone to Co yet?

Bill B


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