Today's Message Index:
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0. 12:17 AM - PLEASE READ - Matronics Email List Fund Raiser During November! (Matt Dralle)
1. 12:45 PM - Re: Fuel Return Line (h&jeuropa)
2. 04:55 PM - 912iS paper (Jan de Jong)
3. 06:33 PM - Re: Re: Fuel Return Line (GRAHAM SINGLETON)
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| Subject: | PLEASE READ - Matronics Email List Fund Raiser During November! |
Dear Listers,
Each November I hold a PBS-like fund raiser to support the continued operation
and upgrade of the Email List and Fourm Services at Matronics. It's through solely
through the Contributions of List members that these Matronics Lists are
possible.
You have probably noticed that there are no banner ads or pop-up windows on any of the Matronics Lists or related web sites such as the Forums site http://forums.matronics.com , Wiki site http://wiki.matronics.com , or other related pages such as the List Search Engine http://www.matronics.com/search , List Browse http://www.matronics.com/listbrowse , etc. This is because I believe in a List experience that is completely about the sport we all enjoy - namely Airplanes and not about annoying advertisements.
During the month of November I will be sending out List messages every couple of
days reminding everyone that the Fund Raiser is underway. I ask for your patience
and understanding during the Fund Raiser and throughout these regular messages.
The Fund Raiser is only financial support mechanism I have to pay all
of the bills associated with running these lists. Your personal Contribution
counts!
Once again, this year I've got a terrific line up of free gifts to go along with
the various Contribution levels. Most all of these gifts have been provided
by some of the vary members and vendors that you'll find on Matronics Lists and
have been either donated or provided at substantially discounted rates.
This year, these generous people include:
Bob Nuckolls of the AeroElectric Connection http://www.aeroelectric.com
Andy Gold of the Builder's Bookstore http://www.buildersbooks.com
Jon Croke of HomebuiltHELP http://www.homebuilthelp.com
These are very generous guys and I encourage you to visit their respective web
sites. Each one offers a unique and very useful aviation-related product line.
I would like publicly to thank Bob, Andy, and Jon for their generous support
of the Lists again this year!!
Please make your List Contribution using any one of three secure methods including
using a credit card, PayPal, or by personal check. All three methods afford
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Thank you for your support!
Matt Dralle
Matronics Email List Administrator
RV-4/RV-6/RV-8 Builder/Rebuilder/Pilot
Message 1
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| Subject: | Re: Fuel Return Line |
While trying to understand our recent 914 power problems, we talked to Rob Seaton
at Rotech.
He suggested we measure how much pressure is required to return the fuel to the
tank (from regulator). Remove return hose from top of regulator, plug one side
of banjo fitting and blow into other (dont ingest fuel!). it should be very
easy (max is 1.5 PSI pressure loss with both pumps on: 914 installation manual
sec 14.3)
We found with the fuel tank full the pressure required was more than we could easily
blow. With the tank half empty not much pressure was required. Our system
is per Europa with the return at the bottom of the tank. Calculations show
the pressure of the column of fuel in a full tank (15 inches of fuel) is about
.4 psi which is certainly less than 1.5 psi.
The Europa setup has worked OK for over 400 hours, but perhaps it would be better
to return the fuel to the top of the tank. Opinions?
Jim & Heather
N241BW
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=386515#386515
Message 2
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(copied from RotaxEngines list)
Those interested in the design of the 912iS may want to buy SAE paper nr
2012-32-0049.
By 3 Rotax engineers and recently presented at an SAE conference.
It costs $23 and can only be printed, during 24 hours, not saved.
Some of the figures need to be printed separately to make some very
small print readable (primitive but working procedure: zoom to maximise
on screen, copy screen to clipboard, paste into picture viewer like
Irfanview, crop in picture viewer and print/save).
I found it interesting. A lot of questions were answered, quite a view
remain.
Jan de Jong
Message 3
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| Subject: | Re: Fuel Return Line |
=0A=0AJim=0AI have always put the fuel return into the top of the tank, (I
used a redesigned tank fitting that incorporated the breather connection (3
/8 aluminum)=0Afuel return and sight gauge return connection. Much less bac
k pressure at the top of the tank and the (maybe hot from the engine driven
pump)=0Athen mixes with the main bulk of the tank contents before going ba
CK TO THE ENGINE. sorry kaps lok again!=0AGraham=0A=0A=0A__________________
______________=0A From: "h&jeuropa" <butcher43@att.net>=0ATo: europa-list@m
atronics.com =0ASent: Thursday, 1 November 2012, 19:45=0ASubject: Europa-Li
uropa" <butcher43@att.net>=0A=0AWhile trying to understand our recent 914 p
ower problems, we talked to Rob Seaton at Rotech.=C2- =0A=0AHe suggested
we measure how much pressure is required to return the fuel to the tank (fr
om regulator). Remove return hose from top of regulator, plug one side of b
anjo fitting and blow into other (don=C3=A2=82=AC=84=A2t ingest fuel!
). it should be very easy (max is 1.5 PSI pressure loss with both pumps on:
=0A 914 installation manual sec 14.3) =0A=0AWe found with the fuel tank ful
l the pressure required was more than we could easily blow.=C2- With the
tank half empty not much pressure was required.=C2- Our system is per Eur
opa with the return at the bottom of the tank.=C2- Calculations show the
pressure of the column of fuel in a full tank (15 inches of fuel) is about
.4 psi which is certainly less than 1.5 psi. =0A=0AThe Europa setup has wor
ked OK for over 400 hours, but perhaps it would be better to return the fue
l to the top of the tank.=C2- Opinions?=0A=0AJim & Heather=0AN241BW=0A=0A
=0A=0A=0ARead this topic online here:=0A=0Ahttp://forums.matronics.com/view
=C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2- =C2
==================
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