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Old 05-20-2015, 09:27 PM
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N941WR N941WR is offline
Join Date: Jan 2005
Location: SC
Posts: 11,912

I'mSomeone asked how to plumb the fuel lines. I looked seriously at adding ER tanks to my -9 and the following are the different ways I have found people have set them up their ER tanks.

1. Pilot activated electric transfer pumps to move fuel to the main tanks.
2. Optical sensors in both main and ER tanks to automatically tun on and off transfer pumps. No pilot action required.
3. Each side's main and ER tanks are plumbed together and share a common vent. The idea being that as fuel is pulled from the main tank, fuel is siphoned from the ER tank.
4. Install a five way Andair valve and plumb a line to each ER tank. Left Outboard, Left Inboard, Right Inboard, Right Outboard, and Off.

I didn't install the Extended Range tanks I was looking at. So, I don't have a recommendation.
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC

Last edited by N941WR : 05-21-2015 at 05:22 AM.
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