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RV10 electrically driven fuel pump

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hotwheels

Joined: 01 Jun 2007
Posts: 240

Posted: Wed Jan 30, 2008 10:24 am Post subject: RV10 electrically driven fuel pump

For those of you already flying with a Lycoming -540 engine...



Is the RV-10 electrically driven fuel pump???



1) A "boost pump" (i.e. run only for engine prime prior to start and then turned off for flight)?



2) Run only during flight to serve as a backup to engine driven fuel pump? 



3) Run primarily at take off and landing time to serve as a backup to the engine driven fuel pump?



4) If both fuel pumps are run at the same time, could that cause engine flooding problems? (this would seem unlikely)



I believe the Cessnas I've flown exhibited #1 while Pipers I've flown exhibited #2/3. What about the RV-10?



Regards,

Jay



 [quote][b]

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Tim Olson

Joined: 25 Jan 2007
Posts: 2879

Posted: Wed Jan 30, 2008 12:13 pm Post subject: RV10 electrically driven fuel pump

Jay Brinkmeyer wrote:

 	  Quote: 	
		   |*For those of you already flying with a Lycoming -540 engine...

 

 Is the RV-10 electrically driven fuel pump???

 

 1) A "boost pump" (i.e. run only for engine prime prior to start and 

 then turned off for flight)?

 


	


Yes.



 	  Quote: 	
		   2) Run only during flight to serve as a backup to engine driven fuel pump?

 


	


Yes.

 	  Quote: 	
		   3) *||*Run primarily at take off and landing time to serve as a backup 

 to the engine driven fuel pump?

 


	


Yes. For the first few seconds after full power application, you

may see a drop in fuel pressure without the boost pump...but it's

short-lived.

 	  Quote: 	
		   4) *||*If both fuel pumps are run at the same time, could that cause 

 engine flooding problems? (this would seem unlikely)

 


	


No, but there are other effects, like your fuel flow will

show increased from actual.  For the IO-540 RV-10, it will

not flood and cause problems, although there are absolutely

some planes that you cannot use the electric pump for anything

but emergency and priming.  The Lycoming IO-540 in our

install is not one of them.



 	  Quote: 	
		   I believe the Cessnas I've flown exhibited #1 while Pipers I've flown 

 exhibited #2/3. What about the RV-10?

 

 Regards,

 Jay

 

 


	


Tim

do not archive

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mritter509(at)msn.com
Guest

Posted: Wed Jan 30, 2008 12:42 pm Post subject: RV10 electrically driven fuel pump

Jay 

  

 I turn the electrical fuel pump on prior to starting until I see a positive fuel flow then off for flight.  The only other time I turn on the pump is when switching fuel tanks.

  

 Mark 

 RV-10/N410MR

 185 Hrs.



<html><div></div></html>

  	  Quote: 	
		    Date: Wed, 30 Jan 2008 09:10:39 -0800

From: jaybrinkmeyer(at)yahoo.com

Subject: RV10 electrically driven fuel pump

To: rv10-list(at)matronics.com



   .ExternalClass DIV {;}     For those of you already flying with a Lycoming -540 engine...



Is the RV-10 electrically driven fuel pump???



1) A "boost pump" (i.e. run only for engine prime prior to start and then turned off for flight)?



2) Run only during flight to serve as a backup to engine driven fuel pump? 



3) Run primarily at take off and landing time to serve as a backup to the engine driven fuel pump?



4) If both fuel pumps are run at the same time, could that cause engine flooding problems? (this would seem unlikely)



I believe the Cessnas I've flown exhibited #1 while Pipers I've flown exhibited #2/3. What about the RV-10?



Regards,

Jay



 	  Quote: 	
		  



get=_blank>http://www.matronics.com/Navigator?RV10-List

p://forums.matronics.com

blank>http://www.matronics.com/contribution



	
	
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wcurtis(at)nerv10.com
Guest

Posted: Wed Jan 30, 2008 2:25 pm Post subject: RV10 electrically driven fuel pump

I would think because it is low wing, fuel injected, for the IO-540 RV-10 it would be 1, 2 and 3.



1; well this one is self explanatory

2; most low wing planes without the benefit of gravity helping to push (or pull) the fuel require the electrical fuel pump on only during tank switching in cruise flight.

3; for the same reason as number 2, low wings planes without the benefit of gravity, usually recommend the electrical fuel pump be on during take-off and landing (for go around possibility) in case there is a failure of the mechanical fuel pump during these times.



In both high wing using only gravity and low wing with just the electrical pump, the engine will not produce anything near full power, however both should provide enough fuel to keep the engine running with some level of power to offer more options.



Because the fuel pumps are plumbed in series, I do not think there is much of a risk of "flooding" the engine with both pumps on in any scenario-other than starting;-).  I have seen pilots accustomed to flying low wing planes insist on turning on the boost pump during take-off and landing in high wing planes even though it is NOT part of the checklist in either of those flight modes.  Without knowing how the fuel system is plumbed, follow the airframe manufacturer checklist.



William

http://wcurtis.nerv10.com/

"Be who you are and say what you feel because those who mind don't matter and those who matter don't mind."

-- Dr. Suess 



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pilotdds(at)aol.com
Guest

Posted: Wed Jan 30, 2008 4:57 pm Post subject: RV10 electrically driven fuel pump

I use mine to prime and start the engine,also to purge when hot starting.For takeoff and landing it is on in case engine driven pump quits in these critical stages of flight.I do notice approximatly one gph drop when I shut off the electric pump.

 

 

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jesse(at)saintaviation.co
Guest

Posted: Wed Jan 30, 2008 5:23 pm Post subject: RV10 electrically driven fuel pump

It is a boost pump for priming prior to start and to run during takeoff and landing in case the engine driven pump fails.  You can run both at the same time without flooding.  The flow meter may think more fuel is going through, but it isn't.  I have heard a number of people say that with the flowscan so close to the pump as on Van's plans, the pulses from the pump make the flowscan think more fuel is passing (non-technical terms, of course).  We have tested in, however, and it doesn't seem to actually change the flow measurably.

 Jesse Saint

Saint Aviation, Inc.

jesse(at)saintaviation.com (jesse(at)saintaviation.com)

Cell: 352-427-0285

Fax: 815-377-3694



 



On Jan 30, 2008, at 12:10 PM, Jay Brinkmeyer wrote:

 	  Quote: 	
		  For those of you already flying with a Lycoming -540 engine...



Is the RV-10 electrically driven fuel pump???



1) A "boost pump" (i.e. run only for engine prime prior to start and then turned off for flight)?



2) Run only during flight to serve as a backup to engine driven fuel pump? 



3) Run primarily at take off and landing time to serve as a backup to the engine driven fuel pump?



4) If both fuel pumps are run at the same time, could that cause engine flooding problems? (this would seem unlikely)



I believe the Cessnas I've flown exhibited #1 while Pipers I've flown exhibited #2/3. What about the RV-10?



Regards,

Jay



 	  Quote: 	
		  http://www.matronics.com/Navigator?RV10-List

href="http://forums.matronics.com">http://forums.matronics.com

href="http://www.matronics.com/contribution">http://www.matronics.com/contribution



	


	


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Ray.R.Doerr(at)sprint.com
Guest

Posted: Wed Jan 30, 2008 5:49 pm Post subject: RV10 electrically driven fuel pump

      I run the electric pump in the tunnel for initial starting and then during take off and landing at that critical part of flight where you would not want your engine driven pump to fail.   

     

Thank You

 Ray Doerr

 40250 N519RV – 350 hours.  

        

  

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Jay Brinkmeyer

 Sent: Wednesday, January 30, 2008 11:11 AM

 To: RV10

 Subject: RV10 electrically driven fuel pump  

  

       

For those of you already flying with a Lycoming -540 engine...

 

 Is the RV-10 electrically driven fuel pump???

 

 1) A "boost pump" (i.e. run only for engine prime prior to start and then turned off for flight)?

 

 2) Run only during flight to serve as a backup to engine driven fuel pump? 

 

 3) Run primarily at take off and landing time to serve as a backup to the engine driven fuel pump?

 

 4) If both fuel pumps are run at the same time, could that cause engine flooding problems? (this would seem unlikely)

 

 I believe the Cessnas I've flown exhibited #1 while Pipers I've flown exhibited #2/3. What about the RV-10?

 

 Regards,

 Jay

 

   

  

  

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dav1111(at)erfwireless.ne
Guest

Posted: Thu Jan 31, 2008 3:48 am Post subject: RV10 electrically driven fuel pump

From:      Jay Brinkmeyer <jaybrinkmeyer(at)yahoo.com (jaybrinkmeyer(at)yahoo.com)>

             Subject:      RV10 electrically driven fuel        pump

       

      For those  of you already flying with a Lycoming -540  engine...

      

       Is the RV-10 electrically driven fuel pump???

       

      1) A "boost pump" (i.e. run only for engine  prime prior to start and then turned

      off for  flight)?

      

 On prior to start, then off.  On for  takeoff and landing.

 

      2) Run only during flight to serve as a  backup to engine driven fuel pump? 



 See above - On immediately if you encounter engine problems.

       

      3)  Run primarily at take off and landing time to serve as a backup to the  engine

      driven fuel pump?



 See above.

      

      4) If both  fuel pumps are run at the same time, could that cause engine  flooding

      problems? (this would seem  unlikely)



 Hasn't happened to me and don't see how it could.  I often leave mine  on from prior to start, through taxi, take off and have on a few  occasions forget to turn it off for more than a few minutes into the  flight.

       

      I  believe the Cessnas I've flown exhibited #1 while Pipers I've flown  exhibited

      #2/3. What about the  RV-10?



 See Above

  

 Russ Daves - N710RV - 190+ hours

       

       Regards,

      Jay



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darnpilot(at)aol.com
Guest

Posted: Thu Jan 31, 2008 4:24 am Post subject: RV10 electrically driven fuel pump

All the replies are right on.  One other consideration: depending upon your installation (engine/fuel/FWF/ambient temps), after you get fully warmed up, you might need to run the pump to prevent vapor lock/engine stumbling, i.e., you just landed and its 90 degrees out, you might get the fuel overheated and some vapor...a burst of the fuel pump will alleviate the problem.

 

 FWIW

 

 Jeff

 

 

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