Airplane jacking

Submitted by Anonymous on

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From: by way of Marvin Kaye <marvkaye [at] olsusa.com> <dechaze [at] cardell.com>
Subject: Re:Airplane jacking
Date: Wed, 18 Nov 1998 08:35:02 -0500
To: <lancair.list [at] olsusa.com>

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Ken Harwood advises against lifting the front of the airplane using the

engine lift hook.



Ken, while I see your point, it's a question of numbers.  Can you offer your

own experience or analysis or that of others to back up your assertion that

the engine isn't stressed to handle "much more" than its own weight?  In

fact, it appears to me that lifting here imparts relatively little stress on

the engine given its configuration and load paths.  I'd welcome more

education on this.



Regards,

Ed de Chazal

Airplane jacking

Submitted by Anonymous on

From: by way of Marvin Kaye <marvkaye [at] olsusa.com> <dechaze [at] cardell.com>
Subject: Re:Airplane jacking
Date: Thu, 19 Nov 1998 09:34:01 -0500
To: <lancair.list [at] olsusa.com>
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My idea of jacking the plane by lifting at the engine, is only a temporary

measure since, as someone rightly pointed out, you need something that works

when you're finished.  I don't plan on keeping my borrowed engine hoist

around.

Now I will have to clean out the jack pad holes I inadvertantly filled with

micro....  



However, I go down swinging, so for those of you squeamish about lifting

the airplane at

the engine, consider lifting at the mount crossover bar.   The load profile

looks nothing like a high negative g maneuver because the wing forces are

absent.



Regards,

Ed de Chazal

Airplane jacking

Submitted by Anonymous on

From: Jeffrey B. Chipetine <abcrental [at] erols.com>
Subject: Airplane jacking
Date: Fri, 20 Nov 1998 16:22:26 -0500
To: <lancair.list [at] olsusa.com>
Cc: <abcrental [at] erols.com>
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Ken Harwood speaks wisely when he cautions builders utilizing an engine

crane to be aware of the dangers of the hydraulic jacks bleeding down

over time.  If anyone is interested,  the FINEST QUALITY (I.M.H.O.)

engine hoist available is from a company called "Bluebird" of Colorado.

These hoists are expensive and well worth it.The cheap  imports found in

the mail order catalogs are cutrate and inferior.  The jacks used in the

imports STINK. Bluebird jacks are great and the factory support is

outstanding if ever needed. Yes they are expensive, but they last

virtually forever and last I heard, bent crankshafts in any Ly/Con were

considered less than optimal... Build Safe/ Jeffrey B. Chipetine