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Fuel flow

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HBaker

Joined: 16 Nov 2008
Posts: 119

Posted: Sun May 19, 2013 3:30 pm Post subject: Fuel flow

I am redoing my fuel flow test , because I am not getting 2900 on my static  run up , or even rolling down the runway , at 37 GPH divided by 60 seconds. should I have 0.61 gallons per minute , this sound right?



Henry [/quote]

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_________________
Currently building a Murphy Moose - any help would be appreciated.

Last edited by HBaker on Sun May 19, 2013 4:18 pm; edited 1 time in total

n801bh(at)netzero.com
Guest

Posted: Sun May 19, 2013 4:03 pm Post subject: Fuel flow

You are burning 37 gallons an hour.... not a minute...... 

do not archive

Ben Haas

N801BH

www.haaspowerair.com



--------

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HBaker

Joined: 16 Nov 2008
Posts: 119

Posted: Sun May 19, 2013 4:17 pm Post subject: Re: Fuel flow

 	  HBaker wrote: 	
		  I am redoing my fuel flow test , because I am not getting 2900 on my static  run up , or even rolling down the runway , at 37 GPH divided by 60 seconds. should I have 0.61 gallons per Minute ??Does this sound right?



Henry 	
[/quote]

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_________________
Currently building a Murphy Moose - any help would be appreciated.

n801bh(at)netzero.com
Guest

Posted: Sun May 19, 2013 4:30 pm Post subject: Fuel flow

Yup....... a little more then 1/2 gallon a minute sounds about right...

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dsavarese0812(at)bellsout
Guest

Posted: Mon May 20, 2013 3:23 am Post subject: Fuel flow

Not getting 2900 RPM at WOT - First confirm your prop blades are set at 

the correct angle.  Then, check the prop governor settings for both high 

and low RPM.

Dennis



A. Dennis Savarese

334-285-6263

334-546-8182 (mobile)

www.yak-52.com

Skype - Yakguy1



On 5/19/2013 7:29 PM, Ben wrote:

[quote]



 Yup.......  a little more then 1/2 gallon a minute sounds about right....



 do not archive



 Ben Haas

 N801BH

 www.haaspowerair.com



 --------

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dsavarese0812(at)bellsout
Guest

Posted: Mon May 20, 2013 3:26 am Post subject: Fuel flow

BTW, you can not get 2900 RPM or 100% STATIC run up.  It should achieve 

2900 on T.O. at WOT.  Normal fuel flow, according to the M14 manual is 

37-41 Gallons per hour at WOT on take off.



A. Dennis Savarese

334-285-6263

334-546-8182 (mobile)

www.yak-52.com

Skype - Yakguy1



On 5/19/2013 6:30 PM, HBaker wrote:

 	  Quote: 	
		   



 I am redoing my fuel flow test , because I am not getting 2900 on my static  run up , or even rolling down the runway , at 37 GPH divided by 60 seconds. should I have 0.61 gallons per second?? Does this sound right?



 Henry 	




 --------

 Currently building a Murphy Moose - any help would be appreciated.





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=400968#400968




[/quote]

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HBaker

Joined: 16 Nov 2008
Posts: 119

Posted: Mon May 20, 2013 3:53 am Post subject: Re: Fuel flow

Thank u Dennis



Can u tell me roughly what u get on static? I'm just wondering if getting 15 GPH on my fuel flow and 2000 on static shouldn't I have been closer to 37 to 41 GPH ? that's why I was Questioning if I was getting full power .

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_________________
Currently building a Murphy Moose - any help would be appreciated.

dsavarese0812(at)bellsout
Guest

Posted: Mon May 20, 2013 5:07 am Post subject: Fuel flow

If all you are getting at static and with the throttle and prop full 

forward is 2000 RPM, I think you have either a prop pitch or prop 

governor issue or both.   2000 RPM and 15 GPH sounds about right.  Only 

at WOT and 2900 RPM will be be seeing 37-41 GPH.  What manifold pressure 

are you seeing at max static RPM?   At WOT and max RPM, the M14P 

develops about 35" or 880 mm of manifold pressure.



I have seen many new engine installations NOT have the prop governor set 

properly to achieve max RPM.  I have also seen the prop blades 

incorrectly set which if set too coarse will prevent the engine from 

achieving 2900 RPM.



What prop/hub is installed on the engine?  Have you ever adjusted the 

arm on the prop governor?  Not just the fine pitch stop.  If you do not 

have the Kimball wheel on the front of the prop governor, I would highly 

recommend you install one.  It is THE easiest way to make prop governor 

adjustments. http://www.jimkimballenterprises.com/web/m14p.php.  It is 

the 7th item down on the page - M14P-7.



A. Dennis Savarese

334-285-6263

334-546-8182 (mobile)

www.yak-52.com

Skype - Yakguy1



On 5/20/2013 6:53 AM, HBaker wrote:

 	  Quote: 	
		   



 Thank u Dennis



 Can u tell me roughly what u get on static? I'm just wondering if getting 15 GPH on my fuel flow and 2000 on static shouldn't I have been closer to 37 to 41 GPH ? that's why I was Questioning if I was getting full power .



 --------

 Currently building a Murphy Moose - any help would be appreciated.





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=400981#400981

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Rhonda(at)bpaengines.com
Guest

Posted: Mon May 20, 2013 6:12 am Post subject: Fuel flow

There is also a liner in the nose case that has a tendency to wear,

which can produce the same result.  After confirming the other issues

are not the problem, you may want to investigate this.  We have a repair

for the issue.



Best,



Rhonda Barrett-Bewley

Barrett Precision Engines

2870-B N. Sheridan Rd.

Tulsa, OK 74115

(918) 835-1089 phone

(918) 835-1754 fax

www.barrettprecisionengines.com



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