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Fuel flow pulsation dampener

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l_klingmuller6(at)earthli
Guest

Posted: Tue Sep 05, 2006 7:49 pm Post subject: Fuel flow pulsation dampener

I have a J P fuel flow/fuel totalizer but are somewhat disappointed in the fuel flow readings.  These fluctuate constantly within a +/- up to 1 gl/hr rate.  Now my installation is not accordingly to the manufactures recommendation which calls for 6 inches of straight line on the inlet and outlet sides.  I attached the sensor right to the gascolator out side since this seems to be a much sounder installation scheme.

  

 Questions for those who have been there:  Is it worthwhile (time, $) to install the Dralle dampener??

 I do not recall seeing too many post on this subject on the list.  Could not find anything in the achieves.

  

 Lothar, 6A, 650 hrs

  

  

 

  [quote][b]

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jeffpoint

Joined: 10 Jan 2006
Posts: 72
Location: MKE

Posted: Tue Sep 05, 2006 11:10 pm Post subject: Fuel flow pulsation dampener

I had a similar, but not quite so high, oscilation on my flow readings.  

I installed the dampener and it smoothed things out considerably.  It's 

not much $ or much work to install, and I recommend it.



Jeff Point

RV-6 flying

RV-8 preview plans

Milwaukee

 	  Quote: 	
		  *

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_________________
Jeff Point
RV-6
Milwaukee WI

FLYaDIVE(at)aol.com
Guest

Posted: Wed Sep 06, 2006 3:13 am Post subject: Fuel flow pulsation dampener

In a message dated 9/6/06 2:44:29 AM Eastern Daylight Time, 

l_klingmuller6(at)earthlink.net writes:



 	  Quote: 	
		   I have a J P fuel flow/fuel totalizer but are somewhat disappointed in the 

 fuel flow readings.  These fluctuate constantly within a +/- up to 1 gl/hr 

 rate.  Now my installation is not accordingly to the manufactures 

 recommendation which calls for 6 inches of straight line on the inlet and 

 outlet sides.  I attached the sensor right to the gascolator out side since 

 this seems to be a much sounder installation scheme.

  

  Questions for those who have been there:  Is it worthwhile (time, $) to 

 install the Dralle dampener??

  I do not recall seeing too many post on this subject on the list.  Could 

not 
	


 	  Quote: 	
		   find anything in the achieves.

  

  Lothar, 6A, 650 hrs

==========================================
	


Lothar:



I have installed 5 fuel flow totalizes, that extra length of straight run 

depends on how you hooked up the fittings.  Especially if you did a 90 Deg turn 

in fuel flow before entering or leaving the transducer.

I have never used the Dralle Dampener, ONLY a smooth flow of fuel is 

required.  In one case where a 90 Deg turn was needed I had to fabricate a fitting 

with oversized bores and a cut away internal turn.  This either reduced or 

eliminated internal restriction or caviation.  

Questions:  

The variance you are seeing, I guess you are seeing it during S&L flight?

How is the accuracy of the instrument on Gallons Remaining? 

By playing with the 'k' factor you might take the gage from a borderline 

reading into a more stabilized reading without affecting the Gallons Remaining 

reading.

Barry

"Chop'd Liver"

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