REFLECTOR: Fuel system design

Alex Balic velocity_pilot at verizon.net
Fri Feb 17 17:34:53 CST 2012


You need another sensor somewhere on the return line, most equipment can
calculate the difference (Dynon, GRT, JPI)

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Jones Nick
Sent: Friday, February 17, 2012 3:42 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Fuel system design

 

I am installing an IO-550 N27B engine from a Cirrus SR22. The fuel flow
sensor is attached to the inter cylinder baffle support between #1 and #3
cylinders inline just before the throttle body. In this location, only the
fuel that is consumed by the engine is measured. The fuel that is returned
to the sump tank is not part of the measurement. 

Graphic1.jpg

 

I figure that there are thousands flying and this is a good location for
them so it's good enough for me.

 

I would not use hose for your interior fuel lines as they are permeable and
will require replacing after 5 years.

 

Best regards,

 

Nick and Connie Jones

Velocity XL-RG

N10CN

99% done 90% to go

 

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Reiff Lorenz
Sent: Friday, February 17, 2012 3:10 PM
To: reflector at tvbf.org
Subject: REFLECTOR: Fuel system design

 

 

Reflector,

 

I will want to start plumbing my fuel and vent system soon, but have many
questions. I'd appreciate any advice you have.

 

1.       Should I use aluminum tubing and flaired connections, as described
in the plans? Or would flexible hoses & compression fittings work better?
Are there other solutions? I'm looking for the easiest installation and
maintenance.

2.       For monitoring fuel flow: What brand of fuel flow sensor should I
use? Should there be 2 separate sensors, one between each strake tank and
the sump? (I will be installing a Continental 550, so there will be a fuel
line to the engine and a fuel return from the engine.)

3.       What's the best resource for learning how to
bend/flair/connect/secure the fuel lines. I flipped through 2 of the
Bingellis books and did not find much good information. I have not yet
checked his engine books . . . maybe there's more info in those.

 

Thanks for any help you can provide!

 

Reiff Lorenz

XL-RG, 30% done

wings/canard/strakes/fuselage structure complete

Still to do: install fuel system, controls, hydraulics, electrical system,
engine, interior, avionics, sand, prime, paint, fly

 

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