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Firewall Fwd stuff - Alternate air / flo-scan fuel flow

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AirMike

Joined: 27 Feb 2007
Posts: 514
Location: Nevada

Posted: Tue Sep 16, 2008 10:26 am Post subject: Firewall Fwd stuff - Alternate air / flo-scan fuel flow

Is everyone putting in the Alternate Air kit that Vans sends. If so where are most of you putting the pull knob in the cockpit. I was thinking about putting it to the lower frame next to your (pilot's) ankles. Seems to be out of the way yet available in an emergency. 



I have gotten many conflicting opinions as to where to place the red cube flo-scan device that comes with the Advanced AFS3500 kit. 

1. In the tunnel near the fuel pump (seems cool and logical).

2. Just in front of the outlet on the firewall engine side

3. Just before the fuel injection distribution manifold. Advised by Lycoming



Boy , as a first time builder it would be great if a veteran builder would put together a complete - "completion guide" for the RV10. It would be really worth it to a lot of us novice 1st time builders.

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_________________
See you OSH '18
Q/B - sold.

pascal(at)rv10builder.net
Guest

Posted: Tue Sep 16, 2008 11:42 am Post subject: Firewall Fwd stuff - Alternate air / flo-scan fuel flow

where to place the red cube flo-scan device that comes with the Advanced 

AFS3500 kit



I plan to follow the plans (section 37-4 fig 3) and put it in the tunnel.

Pascal



--------------------------------------------------

From: "AirMike" <Mikeabel(at)Pacbell.net>

Sent: Tuesday, September 16, 2008 11:26 AM

To: <rv10-list(at)matronics.com>

Subject: Firewall Fwd stuff - Alternate air / flo-scan fuel flow



 	  Quote: 	
		   



 Is everyone putting in the Alternate Air kit that Vans sends. If so where 

 are most of you putting the pull knob in the cockpit. I was thinking about 

 putting it to the lower frame next to your (pilot's) ankles. Seems to be 

 out of the way yet available in an emergency.



 I have gotten many conflicting opinions as to where to place the red cube 

 flo-scan device that comes with the Advanced AFS3500 kit.

 1. In the tunnel near the fuel pump (seems cool and logical).

 2. Just in front of the outlet on the firewall engine side

 3. Just before the fuel injection distribution manifold. Advised by 

 Lycoming



 Boy , as a first time builder it would be great if a veteran builder would 

 put together a complete - "completion guide" for the RV10. It would be 

 really worth it to a lot of us novice 1st time builders.



 --------

 OSH '08 or Bust (busted) be there in &quot;09

 Q/B Kit - exited cabin top/door purgatory





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 4631#204631

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rv10(at)sinkrate.com
Guest

Posted: Tue Sep 16, 2008 5:05 pm Post subject: Firewall Fwd stuff - Alternate air / flo-scan fuel flow

For those not attaching the floscan under the cowl like AFS recommends (and

I didn't either)...  Don't rivet in the attach bracket to the bottom skin

until you actually have the floscan (assuming afs's).  The Van's bracket

holes do not line up w/afs's floscan.  You'll need nutplates that fit a AN4

bolt and you'll end up with them pretty close to the bracket edges.  The

stock bracket uses AN3's.  You'll have to get pretty creative with the

nutplates to get them under the bracket w/o having to a) modify the

nutplates or b) make a larger bracket.



You'll also want to plan it so that you can easily make the tubing that goes

from the pump to the floscan so be mindful of where you "center" the floscan

on the attach bracket.  I think you want to avoid a straight tube here since

technically the pump and floscan qualify as rigidly mounted but when things

are snugged up I'd think a short straight piece of tubing would not ever

become an issue.  It's such a PIA to make that short of a tube with such a

small curve and I highly doubt that the curve will absorb any vibrations

and/or allow for flex.  



I used the 5052 tubing (not the soft stuff from Van's as it is much harder

to make minimum radius bends w/o sacrificing tube diameter) wherever

possible which included this piece.  What you see in the attached picture is

probably attempt number 3.  



I found it much easier on the back to attach the floscan and pump via the

short tube and torque the fittings then install the whole unit as one.  I

also would think one could fabricate a lot of these fuel lines well before

installing the side skins.  I think I bent over the damn fuselage for about

a month off and on before I got things wrapped up.  If I were to do it again

I'd plan to work on as much fuel line fabrication prior to the completion of

sec 29.



http://sinkrate.com/rv10/pics/P1000023.JPG

-Ben Westfall

#40579 (never going to fly... or at least I feel like it)



--

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AirMike

Joined: 27 Feb 2007
Posts: 514
Location: Nevada

Posted: Tue Sep 16, 2008 11:54 pm Post subject: Better the 2nd time around / flo-scan fuel flow

I am putting the AFS3500 flo-scan cube on the sidewall of the tunnel.

 

1. I fabricated a bracket out of "L" aluminum and a couple of flush rivets

2. Then I decided to route the tube in a U-turn backward going up the side wall.

3. Then another U-turn back to the firewall. (might use an elbow coupling)



This way I can remove anything easily

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_________________
See you OSH '18
Q/B - sold.

Kelly McMullen

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

Posted: Wed Sep 17, 2008 3:03 am Post subject: Firewall Fwd stuff - Alternate air / flo-scan fuel flow

I don't know about the design of that particular unit, but most fuel

flow units want some straight fuel line without significant bends for

a distance on either side of the sensor.



On Wed, Sep 17, 2008 at 12:54 AM, AirMike <Mikeabel(at)pacbell.net> wrote:

 	  Quote: 	
		   



 I am putting the AFS3500 flo-scan cube on the sidewall of the tunnel.



 1. I fabricated a bracket out of "L" aluminum and a couple of flush rivets

 2. Then I decided to route the tube in a U-turn backward going up the side wall.

 3. Then another U-turn back to the firewall. (might use an elbow coupling)



 This way I can remove anything easily



 --------

 OSH '08 or Bust (busted) be there in &quot;09

 Q/B Kit - exited cabin top/door purgatory





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 4732#204732

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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:

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

wcurtis(at)nerv10.com
Guest

Posted: Wed Sep 17, 2008 5:34 am Post subject: Firewall Fwd stuff - Alternate air / flo-scan fuel flow

Replacement of the K1000-3 with K2000-3 one lug anchor nut will allow you to use the existing bracket.



http://nerv10.com/wcurtis/08fuselage/fuselage37e.html



William

http://nerv10.com/wcurtis/ 



------

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