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Date: Thu, 27 Dec 2012 09:54:19 -0500
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Subject: Re: [LML] Gross Weight Question
From: Colyn Case <colyncase@earthlink.net>
In-Reply-To: <list-5969199@logan.com>
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References: <list-5969199@logan.com>

Legally you can set the gross weight where you want.
Legally you can be prosecuted for flying the airplane above that gross =
weight.

As far as technically, I don't know the answer but here are some things =
to consider:
- fuel in the wings does not stress the spar as much as weight in the =
fuselage.
- one aspect of weight limitation is climb performance.   The turbo has =
more climb performance.
- aft CG limit
- the Lancair company guidance on the IV was revised upward after an =
internal study.   I don't know how or if that relates to the ES

On Dec 26, 2012, at 12:57 PM, George Wehrung wrote:

Question:  How can the ES-P have a higher gross weight of 3550 lbs. than =
the ES of 3200 lbs? =20

Are they not built on the same fuselage and wing?  I know the =
Turbo-charged version of the IO550 weighs more and they also utilized =
the outboard wing lockers to take the fuel capacity up from 95 to 105 =
gallons which will increase the overall weight of the aircraft when =
filed to capacity.

Am I wrong in assuming that both models use the same wing and wing spar? =
Or am I being conservative in using Lancair's published brochure weights =
of 3200 lbs for our ES?

By the way, does anyone have any flight test data for stall speeds on =
their ES?

Thanks for the help and clarification as I am revising my POH.

George


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