Matronics Email Lists :: View topic - Rotax 912UL fuel flow sensor installation

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Rotax 912UL fuel flow sensor installation

Matronics Email Lists Forum Index -> RotaxEngines-List

View previous topic :: View next topic

Author Message

paul.r.kuntz(at)gmail.com
Guest

Posted: Thu Sep 13, 2007 4:38 pm Post subject: Rotax 912UL fuel flow sensor installation

I'm looking for advice and technical information on installation of a fuel flow sensor on the 912UL engine in my Pipistril Sinus motorglider.  Pipistrel offers two potential locations -- one is in the main fuel feed between the gascolator and the fuel pump; the other is in a fuel line leading from the fuel splitter on one of the carburetors. 

  

 The Pipistrel support staff notes that if the sensor is placed between the gascolator and the fuel pump, it will be inaccurate by the amount of fuel is being returned to the tank in the fuel return line leading out of the splitter.  In that case, the fuel flow instrument will have to be "adjusted" by some undefined amount to account for the fuel return. 

  

 The alternative, however, will measure the fuel flow to only one of the carburetors, so I assume the instrument will have to be adjusted to double the reading in that case.  This assumes that such an adjustment is possible, and it also assumes that the fuel flow to the two carburetors is identical (although if the carburetors are balanced, that is not an unreasonable assumption).   

  

 What are the rest of you doing?

  

 Also, the fuel flow sensor that came with my kit is a Brauniger device.  I plan to use a Dynon FlightDek D180.  Does anyone know the electrical output characteristerics of the Brauniger flow sensor, and can you confirm (or deny) that it is compatible with the Dynon?  Do you know whether the Dynon allows the sort of calibration adjustments necessary to address the installation questions above? 

  

 Thanks a lot,

 Paul Kuntz

 http://www.pipistrelbuilders.com

  [quote][b]

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

gfmjr_20(at)hotmail.com
Guest

Posted: Thu Sep 13, 2007 5:38 pm Post subject: Rotax 912UL fuel flow sensor installation

Paul--

    I have the Dynon 180 and am using their fuel flow meter. I have it in line with the pump and just before the return line on a 912uls.  I initially measured the fuel return to determine what correction would be necessay to apply. My return line has a restrictor in it so the return flow is pretty small. If I remember correctly, the return flow was in the vicinity of about 13-15 onces per hour. This is a pretty small value considering that you will be burning about 5 gallons per hour. I have a 24 gallon capacity, about 4 hours cruise, the returned fuel is a very minor issue.  After 150hours on the plane, I basically just disregard the return flow.

    So, a long winded way of saying go with the placement of the fuel flow in line with the gascolator and pump.

  

 Good luck

 George May

 601XL  912s   150 hours

  	  Quote: 	
		    Date: Thu, 13 Sep 2007 17:37:37 -0700

From: paul.r.kuntz(at)gmail.com

To: rotaxengines-list(at)matronics.com

Subject: Rotax 912UL fuel flow sensor installation



 I'm looking for advice and technical information on installation of a fuel flow sensor on the 912UL engine in my Pipistril Sinus motorglider.  Pipistrel offers two potential locations -- one is in the main fuel feed between the gascolator and the fuel pump; the other is in a fuel line leading from the fuel splitter on one of the carburetors. 

  

 The Pipistrel support staff notes that if the sensor is placed between the gascolator and the fuel pump, it will be inaccurate by the amount of fuel is being returned to the tank in the fuel return line leading out of the splitter.  In that case, the fuel flow instrument will have to be "adjusted" by some undefined amount to account for the fuel return. 

  

 The alternative, however, will measure the fuel flow to only one of the carburetors, so I assume the instrument will have to be adjusted to double the reading in that case.  This assumes that such an adjustment is possible, and it also assumes that the fuel flow to the two carburetors is identical (although if the carburetors are balanced, that is not an unreasonable assumption).  

  

 What are the rest of you doing?

  

 Also, the fuel flow sensor that came with my kit is a Brauniger device.  I plan to use a Dynon FlightDek D180.  Does anyone know the electrical output characteristerics of the Brauniger flow sensor, and can you confirm (or deny) that it is compatible with the Dynon?  Do you know whether the Dynon allows the sort of calibration adjustments necessary to address the installation questions above? 

  

 Thanks a lot,

 Paul Kuntz

 http://www.pipistrelbuilders.com

 	  Quote: 	
		  



ist" target=_blank>http://www.matronics.com/Navigator?RotaxEngines-List

p://forums.matronics.com



	
	
Make your little one a shining star! Shine on!  [quote][b]

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

paul.r.kuntz(at)gmail.com
Guest

Posted: Thu Sep 13, 2007 7:36 pm Post subject: Rotax 912UL fuel flow sensor installation

Thanks, George.  That sounds reasonable.  I  assume that the Dynon does have some means of calibrating the fuel flow readings  -- true?

  

 Regards,

 Paul Kuntz

 [quote]   ---

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

pm(at)tecnam.co.uk
Guest

Posted: Thu Sep 13, 2007 11:44 pm Post subject: Rotax 912UL fuel flow sensor installation

Paul,

 I have a Tecnam Sierra with a Dynon D10 engine  monitor with the Flowscan 201 sensor which is mounted in the fuel line AFTER the  "return to tank bleed" and before the lines split to each carburettor so it only  reads fuel actually being used by both . Works fine and I believe very  accurate.

 Paul Mitchell

 [quote]   ---

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

gfmjr_20(at)hotmail.com
Guest

Posted: Fri Sep 14, 2007 2:43 am Post subject: Rotax 912UL fuel flow sensor installation

Yup.  It's pretty straight forward. Takes about 5 minutes

 [quote]  From: paul.r.kuntz(at)gmail.com

To: rotaxengines-list(at)matronics.com

Subject: Re: Rotax 912UL fuel flow sensor installation

Date: Thu, 13 Sep 2007 20:34:41 -0700

   .ExternalClass .EC_hmmessage P {padding-right:0px;padding-left:0px;padding-bottom:0px;padding-top:0px;} .ExternalClass EC_BODY.hmmessage {font-size:10pt;font-family:Tahoma;}   Thanks, George.  That sounds reasonable.  I assume that the Dynon does have some means of calibrating the fuel flow readings -- true?

 Regards,

 Paul Kuntz

 [quote] ---

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

Float Flyr

Joined: 19 Jul 2006
Posts: 2704
Location: Campbellton, Newfoundland

Posted: Fri Sep 14, 2007 5:59 am Post subject: Rotax 912UL fuel flow sensor installation

Use your first location after  the gascolator.

  

 Noel

 [quote]   

   --

- The Matronics RotaxEngines-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RotaxEngines-List

_________________
Noel Loveys
Kitfox III-A
Aerocet 1100 Floats

Display posts from previous:

	Matronics Email Lists Forum Index -> RotaxEngines-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum