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FS450 calibration

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kheindl(at)msn.com
Guest

Posted: Fri Jul 31, 2009 12:46 pm Post subject: FS450 calibration

I am trying to calibrate the K (fudge) factor for the above fuel flow computer. I have only one transducer and want displays in liters. 

 My re-computed K-factor is way above the limit of the input field C which is limited to 2 digits.

 There is supposed to be a way of using just the one transducer C but how do you do it ?

 Perhaps the automatic option ? The guy at JPI tells me that I must have 2 transducers.

 Any help appreciated.

  

 Karl



 

  [quote][b]

davidjoyce(at)doctors.org
Guest

Posted: Mon Aug 03, 2009 12:13 am Post subject: FS450 calibration

Karl, What engine?  David Joyce

---

kheindl(at)msn.com
Guest

Posted: Mon Aug 03, 2009 4:23 am Post subject: FS450 calibration

  

912s. I don't think there is a solution C except that second transponder. I set the K to 99.99 C but flow rate is 27 litres. the automatic option should work C but the crappy software seems to truncate the internally computed k-factor also.



 Karl



 



  

[quote] From: davidjoyce(at)doctors.org.uk

 To: europa-list(at)matronics.com

 Subject: Re: FS450 calibration

 Date: Mon C 3 Aug 2009 09:10:23 +0100

 

 --> Europa-List message posted by: "David Joyce" <davidjoyce(at)doctors.org.uk>

 

 Karl C What engine? David Joyce

 ---

rlborger(at)mac.com
Guest

Posted: Mon Aug 03, 2009 4:47 am Post subject: FS450 calibration

Karl,



If you are using a return line to the fuel tank (as in my 914) you must use two transducers.  There is no way to calibrate a system with a return line using only one transducer.



Bob Borger

N914XL

XS Mono, 914, Airmaster C/S Prop



[quote]---

kheindl(at)msn.com
Guest

Posted: Mon Aug 03, 2009 5:25 am Post subject: FS450 calibration

  

Bob C

  

 that was my original assumption C but i was told that several europa owners managed to get away with one and accurate readings. i have done the wiring for two C but was trying to save the $300+.  it is really a software problem by not allowing the input or calculation of the k-fudge factor above 99.99.

  

 Karl

 



  

[quote] Date: Mon C 3 Aug 2009 07:37:05 -0500

 From: rlborger(at)mac.com

 To: europa-list(at)matronics.com

 Subject: Re: Europa-List: FS450 calibration

 

 --> Europa-List message posted by: Bob Borger <rlborger(at)mac.com>

 

 Karl C

 

 If you are using a return line to the fuel tank (as in my 914) you must use two transducers. There is no way to calibrate a system with a return line using only one transducer.

 

 Bob Borger

 N914XL

 XS Mono C 914 C Airmaster C/S Prop

 

 >---

davidjoyce(at)doctors.org
Guest

Posted: Mon Aug 03, 2009 12:15 pm Post subject: FS450 calibration

Karl, I have a 914 with FS450 and 2 transponders. My understanding is that 

the flow through the filters, pump/s and pressure valve and return line is 

considerably in excess of the normal fuel consumption, and depends on the 

efficiency of your pumps how clean the filters are, and the calibre of the 

fuel lines. Although the flow to the pressure valve will increase with 

greater engine power & fuel consumption, it will not be in strict proportion 

as there is considerable flow through the valve and the return pipe when the 

engine is not running. In consequence you cannot hope to get a reliable 

indication of fuel consumption without measuring fuel flow out & return & 

getting the instrument to subtract them. Regards, David Joyce, G-XSDJ

---

kheindl(at)msn.com
Guest

Posted: Mon Aug 03, 2009 12:49 pm Post subject: FS450 calibration

David C

  

 you are right of course C but i have been led to believe that the other solution works okay also and gives accurate readings by changing this k-factor. maybe if i change to gallons C but i have no interest in gallons. i just won't use it for a while.



 Karl



 



  

[quote] From: davidjoyce(at)doctors.org.uk

 To: europa-list(at)matronics.com

 Subject: Re: FS450 calibration

 Date: Mon C 3 Aug 2009 20:54:06 +0100

 

 --> Europa-List message posted by: "David Joyce" <davidjoyce(at)doctors.org.uk>

 

 Karl C I have a 914 with FS450 and 2 transponders. My understanding is that 

 the flow through the filters C pump/s and pressure valve and return line is 

 considerably in excess of the normal fuel consumption C and depends on the 

 efficiency of your pumps how clean the filters are C and the calibre of the 

 fuel lines. Although the flow to the pressure valve will increase with 

 greater engine power & fuel consumption C it will not be in strict proportion 

 as there is considerable flow through the valve and the return pipe when the 

 engine is not running. In consequence you cannot hope to get a reliable 

 indication of fuel consumption without measuring fuel flow out & return & 

 getting the instrument to subtract them. Regards C David Joyce C G-XSDJ

 ---

rholder(at)avnet.co.uk
Guest

Posted: Mon Aug 03, 2009 2:09 pm Post subject: FS450 calibration

Karl Heindl wrote:



 	  Quote: 	
		   you are right of course, but i have been led to believe

 that the other solution works okay also and gives

 accurate readings by changing this k-factor. maybe if i

 change to gallons, but i have no interest in gallons. i

 just won't use it for a while.


	




There is a solution using one transponder.



Re-arrange things so that the fuel comes out of the

mechanical fuel pump, to a high point from where the

return feed to the tank is taken, then put in the

transponder and then split the line to each of the carbs.



The tank return must be the highest point in the whole

fuel system.



Ergo. One transponder measuring exactly the fuel flow INTO

the carbs.



I know this can be done as it is how the factory built

Sport Cruiser is set up. I have seen under the cowling of

their demonstrator !



I failed to take a photo but I assure you that was how it

was set up. (Don't ask me how I got to see under the hood

on a SC !)



The transponder requirement is 100mm straight line hose

before it and 50mm after it so a total (including the

transponder) of around 225 mm. Easily found !



Richard

G-OWWW no fuel flow !

kheindl(at)msn.com
Guest

Posted: Mon Aug 03, 2009 4:16 pm Post subject: FS450 calibration

Thank you for that richard. i'll take a look at it and do what you say C unless there is good reason not to change the fuel lines. I think i called it a transponder as well C but it should be transducer C whatever that is.

 Karl

[quote] Date: Mon C 3 Aug 2009 23:07:08 +0100

 From: rholder(at)avnet.co.uk

 To: europa-list(at)matronics.com

 Subject: Re: Europa-List: FS450 calibration

 --> Europa-List message posted by: R Holder <rholder(at)avnet.co.uk>

 Karl Heindl wrote:

 > you are right of course C but i have been led to believe

 > that the other solution works okay also and gives

 > accurate readings by changing this k-factor. maybe if i

 > change to gallons C but i have no interest in gallons. i

 > just won't use it for a while.

 There is a solution using one transponder.

 Re-arrange things so that the fuel comes out of the

 mechanical fuel pump C to a high point from where the

 return feed to the tank is taken C then put in the

 transponder and then split the line to each of the carbs.

 The tank return must be the highest point in the whole

 fuel system.

 Ergo. One transponder measuring exactly the fuel flow INTO

 the carbs.

 I know this can be done as it is how the factory built

 Sport Cruiser is set up. I have seen under the cowling of

 their demonstrator !

 I failed to take a photo but I assure you that was how it

 was set up. (Don't ask me how I got to see under the hood

 on a SC !)

 The transponder requirement is 100mm straight line hose

 before it and 50mm after it so a total (including the

 transponder) of around 225 mm. Easily found !

 Richard

 G-OWW========================> 

   	  Quote: 	
		  [b]

bberube(at)tampabay.rr.co
Guest

Posted: Mon Aug 03, 2009 5:11 pm Post subject: FS450 calibration

Karl,  

We have set up several Europas with a single transducer with good results.  I am sure it is in the archives but some years back.  In fact we are in the midst of  doing one now and would be happy to walk you through it if you give me a call.  

   

Bob Berube  

Flight Crafters  

813 695-1120  

       

From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Karl Heindl

 Sent: Monday, August 03, 2009 7:52 PM

 To: europa-list(at)matronics.com

 Subject: RE: FS450 calibration  

  

  

   

Thank you for that richard. i'll take a look at it and do what you say, unless there is good reason not to change the fuel lines. I think i called it a transponder as well, but it should be transducer, whatever that is.

  

 Karl

 

   



 

 

   

 > Date: Mon, 3 Aug 2009 23:07:08 +0100

 > From: rholder(at)avnet.co.uk

 > To: europa-list(at)matronics.com

 > Subject: Re: FS450 calibration

 > 

 > --> Europa-List message posted by: R Holder <rholder(at)avnet.co.uk>

 > 

 > Karl Heindl wrote:

 > 

 > > you are right of course, but i have been led to believe

 > > that the other solution works okay also and gives

 > > accurate readings by changing this k-factor. maybe if i

 > > change to gallons, but i have no interest in gallons. i

 > > just won't use it for a while.

 > 

 > 

 > There is a solution using one transponder.

 > 

 > Re-arrange things so that the fuel comes out of the

 > mechanical fuel pump, to a high point from where the

 > return feed to the tank is taken, then put in the

 > transponder and then split the line to each of the carbs.

 > 

 > The tank return must be the highest point in the whole

 > fuel system.

 > 

 > Ergo. One transponder measuring exactly the fuel flow INTO

 > the carbs.

 > 

 > I know this can be done as it is how the factory built

 > Sport Cruiser is set up. I have seen under the cowling of

 > their demonstrator !

 > 

 > I failed to take a photo but I assure you that was how it

 > was set up. (Don't ask me how I got to see under the hood

 > on a SC !)

 > 

 > The transponder requirement is 100mm straight line hose

 > before it and 50mm after it so a total (including the

 > transponder) of around 225 mm. Easily found !

 > 

 > Richard

 > G-OWW========================

 

 > 

 > 

 >    	  Quote: 	
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