Today's Message Index:
----------------------
1. 08:09 AM - Lycoming 0-235 Screen Oil Filter (victor verdev)
2. 11:45 AM - Re: Re: New Lycoming Website (teamgrumman@aol.com)
3. 12:10 PM - Fuel pump tests (Gilles Thesee)
4. 02:23 PM - Re: Fuel pump tests (Hinde, Frank George (Corvallis))
5. 05:34 PM - Re: New Lycoming Website (Jon A. Delamarter)
6. 11:02 PM - Re: Re: New Lycoming Website (teamgrumman@aol.com)
Message 1
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| Subject: | Lycoming 0-235 Screen Oil Filter |
I'm installing an the old style oil screen filter
housing(69510) with internal screen on A used 0-235
LYC. The housing has the Temp Control oil cooler
bypass valve(75944) installed in end of housing. Does
(69510)housing bolt right onto the engines accessory
housing, or does it need the steel adapter
plate(LW-12999)between housing and engine?
Get your own web address.
http://smallbusiness.yahoo.com/domains/?p=BESTDEAL
Message 2
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| Subject: | Re: New Lycoming Website |
Thanks for the response. I do firewall forward restorations on Grumman
Tigers and Cheetahs about 3 or 4 times a year. About 50% of them ask
for the LASAR mags and, quite frankly, I discourage it because of my
experience with Unison. They, it appears to me and everyone else with
whom I've talked, have no desire to produce this product. I get the
impression that the LASAR mags are a nuisance to them. I would like to
see Lycoming take the initiative and produce an electronic ignition for
their engines. And do it a lot simpler than Unison. Right now there
are several electronic ignitions on the market for experimental
aircraft that are clean and simple; get one of them approved for
certified aircraft.
Gary
-----Original Message-----
From: jdelamarter@lycoming.textron.com
Sent: Tue, 13 Mar 2007 11:04 AM
Subject: Engines-List: Re: New Lycoming Website
<jdelamarter@lycoming.textron.com>
Gary:
Thanks for your question. I'm not aware of any intitiative from
Lycoming to
procure any part of Unison's business. However, I am frequently in
contact with
Unison. I would like to forward your request to my contact, Fred
Sontag.
Please email me your concerns at jdelamarter@lycoming.textron.com. I
willcommunicate with Fred and ask him for a response. I know from
talking to
him that he is working hard to close the loop on these types of
concerns. He
took care of one of my customers recently in an extremely effective
manner.
Regards,
--------
Jon A. Delamarter
Thunderbolt Manager
Lycoming Engines
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=100312#100312
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Message 3
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Hi all,
Just conducted some test on our Rotax 914 fuel system, just to learn more.
The idea was running a brand new electrical pump with clear plastic
tubing from different points of the circuit, and observing what was
going on.
We noted that slugs of bubbles appear on the suction side of the pump
when it is connected downstream of the fuel valve (large pressure drop).
On the pressure side of the pump, very few bubbles appear.
My interpretation is that when the pump draws fuel from a restricted
portion of the circuit such as the fuel valve and all the fittings and
elbows, the most volatile fraction of the fuel tends to vaporise, and
then condenses when under pressure downstream of the pump.
I believe this is a normal phenomenon, but it was the first time I
observed it through clear hoses.
Has anyone already seen such a phenomenon ? Any comments ?
Some info on our engine fuel system here :
http://contrails.free.fr/engine_regul_en.php
Thanks,
Regards,
Gilles Thesee
http://contrails.free.fr
Message 4
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Your right that is exactly what is happening. It also gets worse as the
temperature of the fuel increases, namely thru a hot engine driven
pump...I gets worse further with altitude and the harder you suck on the
fuel. When it gets really bad its called vapour lock and your engine
quits. It will also happen more with autofuel than with 100LL due to the
higher vapour pressure of the mogas. Low wing airplanes (with wing tanks
and no header tank are much more susceptable because the engine driven
pump is sucking uphill.
This coindiently may happen at the worse possible time i.e a hot Summer
day at a high altitude airport where your fuel has been heat
soaked....You run full power, the engine gets real hot and Here come the
trees!
So, what to do?....Mount a low pressure electric pump as close to the
outlet of tha tank as possible with no pressure drop on the inlet side
of the pump.
My Zenair Zodiac (and my current Fuel injected RV 7) did not have an
engine driven pump, just a Facet fuel pump in each wing root. Thus the
pump always pushed on the fuel, never sucked. The pumps were (are) wired
to independent circuits such that if a pump failed the other pump will
take over.
Lycomings typically have a low level booster pump to augment the engine
driven pump and that's with 100LL.
Frank
RV7a no engine driven pump, mainly cus one day I want to use Mogas in
it....but only below about 15,000feet.
-----Original Message-----
From: owner-engines-list-server@matronics.com
[mailto:owner-engines-list-server@matronics.com] On Behalf Of Gilles
Thesee
Sent: Wednesday, March 14, 2007 12:10 PM
Subject: Engines-List: Fuel pump tests
--> <Gilles.Thesee@ac-grenoble.fr>
Hi all,
Just conducted some test on our Rotax 914 fuel system, just to learn
more.
The idea was running a brand new electrical pump with clear plastic
tubing from different points of the circuit, and observing what was
going on.
We noted that slugs of bubbles appear on the suction side of the pump
when it is connected downstream of the fuel valve (large pressure drop).
On the pressure side of the pump, very few bubbles appear.
My interpretation is that when the pump draws fuel from a restricted
portion of the circuit such as the fuel valve and all the fittings and
elbows, the most volatile fraction of the fuel tends to vaporise, and
then condenses when under pressure downstream of the pump.
I believe this is a normal phenomenon, but it was the first time I
observed it through clear hoses.
Has anyone already seen such a phenomenon ? Any comments ?
Some info on our engine fuel system here :
http://contrails.free.fr/engine_regul_en.php
Thanks,
Regards,
Gilles Thesee
http://contrails.free.fr
Message 5
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| Subject: | Re: New Lycoming Website |
Gary:
Actually, Lycoming is extensively engaged in Electronic Engine Control development.
I can't spill the beans yet, but suffice to say that we are making excellent
progress and I am really excited about the product we will be bringing to
market! This system will control all engine parameters, not just ignition.
Keep watching!
All the best,
--------
Jon A. Delamarter
Thunderbolt Manager
Lycoming Engines
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=100596#100596
Message 6
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| Subject: | Re: New Lycoming Website |
Awesome. In what year?
-----Original Message-----
From: jdelamarter@lycoming.textron.com
Sent: Wed, 14 Mar 2007 5:33 PM
Subject: Engines-List: Re: New Lycoming Website
<jdelamarter@lycoming.textron.com>
Gary:
Actually, Lycoming is extensively engaged in Electronic Engine Control
development. I can't spill the beans yet, but suffice to say that we
are making
excellent progress and I am really excited about the product we will be
bringing
to market! This system will control all engine parameters, not just
ignition.
Keep watching!
All the best,
--------
Jon A. Delamarter
Thunderbolt Manager
Lycoming Engines
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=100596#100596
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