The early Lancair ES ran the IO-360 engine. Later on, the IO-540 became the engine of choice. Somewhere down the line, Lancair chose to upsize the fuel lines on the ES, maybe because of the preference for the larger engines. So, I upsized the fuel lines because Lancair upsized the fuel lines on the later ES kits. I figured that since I was planning on running auto fuel, and that I live in Texas where it gets very hot in the summertime, that it would be cheap insurance. So far, I have had no fuel issues, so I guess it didn't hurt anything except to add a 1/4 lb to the gross weight.
Funny thing was that in the conversion to larger lines, I was able to use the old 3/8" supply lines as the new return lines and only had to replace the original 3/8" supply lines with new 1/2" line. To complete the upgrade, I changed out the old AN-6 and AN-4 fittings with AN-8 and AN-6 fittings.
Mark S.
On Sat, Jul 11, 2009 at 5:53 PM, Bryan Winberry <bryanwinberry@bellsouth.net> wrote:
Thanks Mark,
Why did you enlarge your lines to ˝ with the 3/8 valve?
BW
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mark Steitle
Sent: Saturday, July 11, 2009 6:07 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: andaiar valve
The 20-20 sounds like what I'm running on my 3-rotor, but with lines upgraded to 1/2 supply and 3/8 return. I run mogas 90% of the time and have had no problems. Of course, every system is different, so YMMV.
On Sat, Jul 11, 2009 at 3:01 PM, Bryan Winberry <bryanwinberry@bellsouth.net> wrote:
Hello group,
I’m contemplating buying an Andair 25-20 duplex valve from a guy. I was going to use the 20-20 which has 3/8ths supply and return.
The 25-20 has ˝ supply and 3/8 return. Any problem using this valve with the ˝ in fittings (reduced of course) with my 3/8 in. supply line?
Thanks,
Bryan
Renesis
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