Mailing List flyrotary@lancaironline.net Message #58900
From: Tracy <rwstracy@gmail.com>
Subject: Re: [FlyRotary] Re: Prop revs
Date: Mon, 27 Aug 2012 08:17:09 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
You are probably correct Neil.  I was thinking the scale factor was used differently on that function.  Yes, try increasing to 3.78.   To get the first initial increase, bump it up by something over 50% which will cause the EM3 to add 1 + the percentage indicated.

Tracy

Sent from my iPad

On Aug 27, 2012, at 1:44 AM, "Neil Unger" <neil.unger@bigpond.com> wrote:

Tracy,
            Not sure how your monitor counts, but changed the scale factor from 1 (standard) to .265 as suggested  (divided 1 by 3.78) and now at 2000rpm I am getting a reading of 0.5 gal PH which should be litres!!  Sure makes it economical!    Seems like I should multiply by 3.78 as that would seem more like it.  What do you think ?  Neil.
 
From: Tracy
Sent: Friday, August 24, 2012 11:37 AM
Subject: [FlyRotary] Re: Prop revs
 
I'd start by dividing the current scale factor of FF channel by 3.75 , plug that value in there and see if it looks right. I'll try it on the bench when I get a chance.
 
Tracy

Sent from my iPad

On Aug 23, 2012, at 5:30 PM, "Neil Unger" <neil.unger@bigpond.com> wrote:

Tracy,
             Prop is a prince P tip,  70” dia by 90” pitch.   Any suggestions as to what numbers I can alter to convert US gal. to litres?  Somehow I have to get the readings up 3.75 to get litres.    Neil.
 
From: Tracy
Sent: Tuesday, August 21, 2012 10:17 PM
Subject: [FlyRotary] Re: Prop revs
 
ONLY?   6300 is at the HIGH end of normal static.  I would be more concerned about over Reving at top speed if this were a 200+ MPH plane.   It will probably be about right for the glastar though.  
 
Be happy, celebrate!   BTW, what are the numbers on that prop?  L x P?
 
Tracy

Sent from my iPad

On Aug 20, 2012, at 9:48 PM, "Neil Unger" <neil.unger@bigpond.com> wrote:

All,
       Looks like I am finally connected after many attempts..  I have a P ported renesis in a glastar that is ready to fly.  Tuning the motor yesterday to find that I cannot get the motor revs over 6300.  I suspected the prop (prince fixed) is too big, but am assured that that is normal as a static load.  Lonnie suggests that once moving the extra revs will appear.  How do I tune the motor for the top end revs?  Any advice?  Neil.
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