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Date: Wed, 01 Jun 2011 11:50:42 -0400
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From: vtailjeff@aol.com
Subject: Re: [LML] Re: L-IV Choice of Engine
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Ted,

I think this group will offer some well thought "but what if?" comments to y=
our project. Many are worth consideration. Best of luck with it.

Jeff Edwards

Sent from my iPad

On Jun 1, 2011, at 5:42 AM, Hamid Wasti <hwasti@lm50.com> wrote:

> Ted Noel wrote:
>> Your comments below are part of what drives me nuts in this conversation.=
 A fuel line failure is NOT an engine issue. It is a systems issue that appl=
ies to every aircraft that ever flew (except electrics). Thus, using it as a=
 condemnation of a one-off application is not germane to the topic.
> Actually, it is exactly the issue and your not recognizing it as such make=
s me worry about your grasp of the problem.
>=20
> The fuel system on every aircraft that ever flew was designed, tested and v=
alidated over years and decades and that validation paid for in blood and li=
ves. If you want to take advantage of that validation, fly one of those syst=
ems. Otherwise the one-of fuel system in your one-of implementation is as un=
tested as the engine it is feeding. You trivialize it and other systems at t=
he peril of your life.
>=20
> When you buy a Lycoming engine for your airplane or a Ford engine for your=
 car, someone has done all the engineering including the system level engine=
ering. Even though the engine does not come with a fuel line or electric cab=
les, the knowledge of how to make those connections comes with the engine. W=
hen you install the engine, you are implementing an existing and validated d=
esign. You are not designing something new.
>=20
> When you do a one-of design, you have to design those systems from scratch=
. You can learn from what Lycoming or Ford did, but it is still a new design=
 and subject to errors, oversights and other mistakes. The more things you a=
re designing in an implementation, the higher the probability that errors wi=
ll be present in the final system and that one of these errors could start a=
 catastrophic chain reaction.
>=20
> You have talked a lot about your engine. What is your operational history?=
 How many hundred hours do you fly each year and how many hundred hours have=
 you flown? What are your operational results for fuel consumption, temperat=
ures and performance?
>=20
> Regards,
>=20
> Hamid
>=20
>=20
> --
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