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5inch before and after redcube fuel-transducer

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Mike Whisky

Joined: 05 Jun 2006
Posts: 336
Location: Switzerland

Posted: Thu Jul 28, 2011 11:54 am Post subject: 5inch before and after redcube fuel-transducer

Hello 

For those who installed the redcube fuel transducer which comes with AFS did you manage to allow a straight line 5in before and after the redcube. If not do you still have accurate readings of fuel flow?



Cheers

Michael

_________________
RV-10 builder (flying)
#511

dave.saylor.aircrafters(a
Guest

Posted: Thu Jul 28, 2011 2:38 pm Post subject: 5inch before and after redcube fuel-transducer

Make the inlets and outlets as straight as you can but I've seen 90s

screwed into each end and it still worked fine.  IIRC the outlet is

the most critical.



Dave Saylor

AirCrafters

140 Aviation Way

Watsonville, CA 95076

831-722-9141 Shop

831-750-0284 Cell



On Thu, Jul 28, 2011 at 12:54 PM, Michael Wellenzohn

<rv-10(at)wellenzohn.net> wrote:

 	  Quote: 	
		   



 Hello

 For those who installed the redcube fuel transducer which comes with AFS did you manage to allow a straight line 5in before and after the redcube. If not do you still have accurate readings of fuel flow?



 Cheers

 Michael



 --------

 RV-10 builder (interior,avionics, wiring)

 #511





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=347945#347945

orchidman

Joined: 10 Jul 2006
Posts: 277
Location: Oklahoma City - KRCE

Posted: Thu Jul 28, 2011 3:02 pm Post subject: Re: 5inch before and after redcube fuel-transducer

And put it between the servo and the spider. I have 45's on each side of my cube. Great accuracy.

_________________
Gary Blankenbiller
RV10 - # 40674
(N2GB Flying)

maca2790

Joined: 26 Jan 2011
Posts: 59
Location: Australia

Posted: Thu Jul 28, 2011 3:52 pm Post subject: Re: 5inch before and after redcube fuel-transducer

I have put mine in the Position provided by Vans in the QB Fuselage I received. It's about 7 inchs from the Andair Pump I have Installed and I will most likley run the  outlet to a lower postion on the firewall where I will place a Gascolator.



cheers



John MacCallum

VH-DUU

pitts_pilot(at)bellsouth.
Guest

Posted: Thu Jul 28, 2011 5:13 pm Post subject: 5inch before and after redcube fuel-transducer

John, why a gascolator?  How are you going to get to it to sump it???

Linn



On 7/28/2011 7:52 PM, maca2790 wrote:

 	  Quote: 	
		   



 I have put mine in the Position provided by Vans in the QB Fuselage I received. It's about 7 inchs from the Andair Pump I have Installed and I will most likley run the  outlet to a lower postion on the firewall where I will place a Gascolator.



 cheers



 John MacCallum

 VH-DUU





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=347957#347957

Kelly McMullen

Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ

Posted: Thu Jul 28, 2011 8:53 pm Post subject: 5inch before and after redcube fuel-transducer

Some countries seem to believe that a gascolator is necessary for both

carbureted and injected engines and thus require one.



On Thu, Jul 28, 2011 at 6:09 PM, Linn Walters <pitts_pilot(at)bellsouth.net> wrote:

 	  Quote: 	
		   



 John, why a gascolator?  How are you going to get to it to sump it???

 Linn



 On 7/28/2011 7:52 PM, maca2790 wrote:

>

> 

>

> I have put mine in the Position provided by Vans in the QB Fuselage I

> received. It's about 7 inchs from the Andair Pump I have Installed and I

> will most likley run the  outlet to a lower postion on the firewall where I

> will place a Gascolator.

>

> cheers

>

> John MacCallum

> VH-DUU

>

>

> Read this topic online here:

>

> http://forums.matronics.com/viewtopic.php?p=347957#347957

>

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD

maca2790

Joined: 26 Jan 2011
Posts: 59
Location: Australia

Posted: Fri Jul 29, 2011 2:05 pm Post subject: Re: 5inch before and after redcube fuel-transducer

I believe it is an advantage to have a water Trap in the System as well.

I'm not sure if it is required in Australia but I will check with my  Tech Counselor next week when he visits. I bought an extension tube for the Bowl and hope to drain it through a hole in the cowl such as on the 172 SP I have been flying lately.



>John, why a gascolator? ï¿½How are you going to get to it to sump it??? 

>Linn

carl.froehlich(at)verizon
Guest

Posted: Fri Jul 29, 2011 3:27 pm Post subject: 5inch before and after redcube fuel-transducer

My understanding is there is no path for water to gravity flow to a

gascolator in most low wing aircraft.  The water in the fuel tank collects

at the low point.  For RVs that is at the fuel tanks sump as water cannot go

up hill via the fuel line, even if the gascolator is lower than the bottom

of the tank.  Water entrained in the fuel as fuel is flowing may have a

small fraction separate in the gascolator, but the majority will remain

entrained.  I do know however that the Andair gascolator filter screen meets

the requirement for the AFP fuel injection system. 



Carl



--

maca2790

Joined: 26 Jan 2011
Posts: 59
Location: Australia

Posted: Sat Jul 30, 2011 2:53 pm Post subject: Re: 5inch before and after redcube fuel-transducer

Re water suspended in the fuel I don't know either if the Andair Gascolator

will remove it. I will follow up with Andair and see what they say.



cheers



John MacCallum

Mike Whisky

Joined: 05 Jun 2006
Posts: 336
Location: Switzerland

Posted: Sun Jul 31, 2011 9:29 am Post subject: Re: 5inch before and after redcube fuel-transducer

Thanks for your replies.



From what I understand now based on your feedback it shouldn't be a risk to install the redcube in the tunnel but should try to leave some straight line at the output of it. 

Well I'll do my measurements then and order Bonaco Teflon lines. 



Thanks

Michael

_________________
RV-10 builder (flying)
#511

robin(at)PaintTheWeb.com
Guest

Posted: Sun Jul 31, 2011 11:45 am Post subject: 5inch before and after redcube fuel-transducer

Michael,I have been following the thread but am not completely up to date on the last conversations since I have been flying X-County back from OSH. 

That being said I strongly recommend you do not install the cube in the tunnel. I think the general consensus is that it is more important to install it between the fuel server and the spider than having 5" in/out of the cube.

 I had mine in the tunnel and could not get a steady reading on my FP. This made it impossible to refine my LOP flying and it also consistently set off my Low FP alarm because the reading bounced so much during straight & level flight. When I finally relocated the cube to the above detailed location the readings became rock solid and I have not had a single Low PF warning since.

 



Good luck,

Robin





 

On Sun, Jul 31, 2011 at 10:29 AM, Michael Wellenzohn <rv-10(at)wellenzohn.net (rv-10(at)wellenzohn.net)> wrote:

 [quote]--> RV10-List message posted by: "Michael Wellenzohn" <rv-10(at)wellenzohn.net (rv-10(at)wellenzohn.net)>

  

 Thanks for your replies.

 

 >From what I understand now based on your feedback it shouldn't be a risk to install the redcube in the tunnel but should try to leave some straight line at the output of it.

 Well I'll do my measurements then and order Bonaco Teflon lines.

 

 Thanks

 Michael

 

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 http://forums.matronics.com/viewtopic.php?p=348168#348168

 

 

 

 

 

 

 

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Mike Whisky

Joined: 05 Jun 2006
Posts: 336
Location: Switzerland

Posted: Sun Jul 31, 2011 12:52 pm Post subject: Re: 5inch before and after redcube fuel-transducer

Robin,

Thanks for your feedback, how and where exactly did you mount the red cube? Pictures would be appreciated. 



Looks like I was the only one not being in Osh this year 

Thanks

Mike

_________________
RV-10 builder (flying)
#511

robin(at)PaintTheWeb.com
Guest

Posted: Sun Jul 31, 2011 2:42 pm Post subject: 5inch before and after redcube fuel-transducer

Mike,

Sorry no photos but the location is specific to your firewall forward.

In my case I have forward facing cold induction. Basically we found a

place where we were able to fabricate a small bracket to support the

cube and ran our line out of the servo with a straight shot into the

cube then as much of a straight out till the tube turns up towards the

spider.

I suggest you sit underneath your engine and hold the cube till you

find the best place understanding where you are coming from and where

you need the line to go. Some people leave the cube unsupported but I

preferred it to be supported and tied to something substantial.

Good luck,

Robin



Sent from my iPad2.



On Jul 31, 2011, at 2:00 PM, "Mike Whisky" <rv-10(at)wellenzohn.net> wrote:



 	  Quote: 	
		   



 Robin,

 Thanks for your feedback, how and where exactly did you mount the red cube? Pictures would be appreciated.



 Looks like I was the only one not being in Osh this year

 Thanks

 Mike [Wink]



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 RV-10 builder (interior &amp; finishing)

 #511





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=348182#348182

bill.peyton

Joined: 19 Sep 2010
Posts: 198
Location: St. Louis, MO

Posted: Mon Aug 01, 2011 5:47 pm Post subject: Re: 5inch before and after redcube fuel-transducer

While I have read that some have decent results from mounting the FP sensor in the tunnel between the electric and mechanical fuel pumps, I would not recommend it.  As Robin stated, the readings will fluctuate wildly due to the interaction between the pumps.  I have personally seen this on several installations, both carburetor and injected.  As long as you mount it after the mechanical pump and leave a couple of inches of straight they seem to work fine.  Putting it between the servo and the spider is a good example of this.  Making a bracket and supporting the hose leading to and away from the cube is also important.

_________________
Bill
WA0SYV
Aviation Partners, LLC

Mike Whisky

Joined: 05 Jun 2006
Posts: 336
Location: Switzerland

Posted: Tue Oct 04, 2011 12:14 pm Post subject: Re: 5inch before and after redcube fuel-transducer

Hello all,



I thought IÂ´d post my solution of the position of the fuel flow sensor (red cube). For those who are looking for an alternative position. 

I need to order now new fuel lines and will then finally attach the bracket to the engine case and safety wire the bolts.



Mike

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