VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.


Go Back   VAF Forums > Model Specific > RV-10
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 03-02-2015, 05:47 PM
majuro15's Avatar
majuro15 majuro15 is offline
 
Join Date: Feb 2013
Location: Charlotte, NC
Posts: 676
Default

From talking to Robert at EFII (call him, he's extremely helpful), it doesn't need to go outboard in the tank. A lot of folks are just having the fitting dump into the first bay. I originally had mine going to the second bay just to help cooling the fuel down a bit, but others that are flying say they haven't had any issues.

If you plan ahead, I think you will be able to retrofit your tanks through the sender hole.
__________________
www.N1017H.com
Tim Huneycutt, Capt, NCANG
PC-12 Pilot
N1017H RV-10 Flying 2019
EAA #: 1106970
2021 VAF Dues Paid!
Reply With Quote
  #12  
Old 03-03-2015, 08:53 AM
rocketman1988 rocketman1988 is offline
 
Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,650
Default Retro fit...

You don't even need the sender hole. I have the QB wings and am going to use the EFII system. After discussing it with Robert, I ended up using an aluminum flange with 1/4" NPT threads.

Pick a location, carefully drill the center hole and rivet holes. I used grease in the flutes of the drill bit to capture the chips, along with a vacuum at the drill site.

Debur, ProSeal, and rivet using closed end rivets.

Now you have a 1/4" NPT tank bung that you can install any fitting necessary...
__________________
Bob
Aerospace Engineer '88

RV-10
N464RL

Dues+ Paid 2020,...Thanks DR+
Reply With Quote
  #13  
Old 03-03-2015, 12:49 PM
JDanno JDanno is offline
 
Join Date: Apr 2008
Location: Tennessee
Posts: 440
Default

If you are really worried (paranoid) about cool fuel, fire sleeve the fuel lines through the tunnel. It can get really hot in there especially if the heater is on.
Reply With Quote
  #14  
Old 03-03-2015, 01:22 PM
clutch22 clutch22 is offline
 
Join Date: Jul 2012
Location: Bartlesville, OK
Posts: 244
Default

Quote:
Originally Posted by rocketman1988 View Post
You don't even need the sender hole. I have the QB wings and am going to use the EFII system. After discussing it with Robert, I ended up using an aluminum flange with 1/4" NPT threads.

Pick a location, carefully drill the center hole and rivet holes. I used grease in the flutes of the drill bit to capture the chips, along with a vacuum at the drill site.

Debur, ProSeal, and rivet using closed end rivets.

Now you have a 1/4" NPT tank bung that you can install any fitting necessary...
Thanks. I like this method. And as long as there's no problem with the system pumping the return fuel into the first bay then it should work just fine. What I'm still confused about is if the return line is pressurized through another pump. It looks like maybe the EFII fuel pump is two pumps (1 for the fuel going to the engine and 1 for the fuel return line. Is this right?)
For example, would it have a problem overcoming any positive fuel pressure from a full fuel tank as it enters the tank.
__________________
Andrew Austin

RV-10
-Flying!
Reply With Quote
  #15  
Old 03-03-2015, 01:59 PM
majuro15's Avatar
majuro15 majuro15 is offline
 
Join Date: Feb 2013
Location: Charlotte, NC
Posts: 676
Default

The EFII pump is a dual pump system with one primary and one back up. Both have plenty of power to overcome any fuel in the tank if the return line is plumbed in somewhere below the fluid level. If really concerned, plumb in a one way check valve close to the tank, but don't think that's necessary.

The flange idea is another option and may be the way I go as well.
__________________
www.N1017H.com
Tim Huneycutt, Capt, NCANG
PC-12 Pilot
N1017H RV-10 Flying 2019
EAA #: 1106970
2021 VAF Dues Paid!
Reply With Quote
  #16  
Old 03-03-2015, 02:04 PM
clutch22 clutch22 is offline
 
Join Date: Jul 2012
Location: Bartlesville, OK
Posts: 244
Default

Okay okay. I think I have things straight now. Thanks!
__________________
Andrew Austin

RV-10
-Flying!
Reply With Quote
  #17  
Old 03-03-2015, 07:15 PM
rocketman1988 rocketman1988 is offline
 
Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,650
Default return

Just make sure that your return line is 3/8" with -6 fittings to match the supply. The EFII system is a full flow system, i.e. the return line needs to be able to flow as much as the supply line.

The location of the return to the tank is non critical, though he said to keep it several inches from the supply fitting.

I don't think there will be any issues with hot fuel in the tunnel as the EFII system continuously flows fuel from the tank and back to the tank.

It is a double electric pump, one primary and one backup...no mechanical pump on the engine.

Don't forget that you will need to use a duplex fuel selector valve...you need to switch the return lines as well as the supply lines. I used an Andair valve.
__________________
Bob
Aerospace Engineer '88

RV-10
N464RL

Dues+ Paid 2020,...Thanks DR+
Reply With Quote
  #18  
Old 03-05-2015, 10:56 AM
Lynnb's Avatar
Lynnb Lynnb is offline
 
Join Date: Jan 2014
Location: Cedar Hill, TX
Posts: 342
Default Parts to use

Can anyone help me out with what parts/fittings/tubing are needed for this? Do you just order an extra set of vent line parts from vans?

Last edited by Lynnb : 03-05-2015 at 12:06 PM. Reason: spelling
Reply With Quote
  #19  
Old 03-05-2015, 02:02 PM
rocketman1988 rocketman1988 is offline
 
Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,650
Default Return lines

I think each application is going to be different depending on the system being used and personal preference. In my case, I am using the EFII fuel injection and ignition, so for the fuel system I used:

EFII double electric fuel pumps mounted in the tunnel

Two EFII pre filters mounted one under each seat

Andair duplex fuel selector valve and extension

EFII Pressure Regulator...mounted on firewall

Two 1/4" NPT aluminum flanges, one for each tank return

Closed end blind rivets for flange installation

Firewall bulkhead fitting

Tunnel bulkhead fittings

Fuselage bulkhead fittings

B Nuts and sleeves

5052 aluminum tube for lines

Adel clamps

And a substantial amount of time to fabricate the lines

If I did it again, I would probably just get Tom at TS Flightlines to make all the lines.
__________________
Bob
Aerospace Engineer '88

RV-10
N464RL

Dues+ Paid 2020,...Thanks DR+
Reply With Quote
  #20  
Old 03-05-2015, 02:21 PM
Lynnb's Avatar
Lynnb Lynnb is offline
 
Join Date: Jan 2014
Location: Cedar Hill, TX
Posts: 342
Default

Quote:
Originally Posted by rocketman1988 View Post
I think each application is going to be different depending on the system being used and personal preference. In my case, I am using the EFII fuel injection and ignition, so for the fuel system I used:

EFII double electric fuel pumps mounted in the tunnel

Two EFII pre filters mounted one under each seat

Andair duplex fuel selector valve and extension

EFII Pressure Regulator...mounted on firewall

Two 1/4" NPT aluminum flanges, one for each tank return

Closed end blind rivets for flange installation

Firewall bulkhead fitting

Tunnel bulkhead fittings

Fuselage bulkhead fittings

B Nuts and sleeves

5052 aluminum tube for lines

Adel clamps

And a substantial amount of time to fabricate the lines

If I did it again, I would probably just get Tom at TS Flightlines to make all the lines.
Thanks, right now my biggest concern is the fittings for the return lines to the tanks, I'll make other decisions a little later. I just didn't want to get the fuel tanks closed up and then find out there was something I missed. That's one of the frustrating things about this project is I almost feel like I need to have it all planned out from start to finish, just when I think I'm sailing along, bam have you thought about X. Owell, one rivet at a time.

Thanks,
Lynn
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 12:38 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.