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Two seater CG question



 
 
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Old June 4th 14, 09:36 AM posted to rec.aviation.soaring
Bengt Aronsson[_2_]
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Posts: 2
Default Two seater CG question

Instructions for reducing min front seat load when flying with
both seats occupied are in the manuals for the newer Duo X,
Arcus and through optional TN 295-29 for Janus.
Maybe it's also in the revision 9 for Duo FM, but the download
link on S-H website doesn't work. Ask S-H, and they will
probably solve it.
Regarding blaming EASA, I think it's actually the opposite,
german LBA had very restrictive view on complicated load
instructions, but EASA seems to accept this.
Also the ASK 21 has a corresponding TN nr 35, where the
reduction is allowed in the german and UK-flagged manual
pages, but not in the US-flagged. So maybe the FAA is to blame?

Bengt



At 07:55 04 June 2014, Jim White wrote:
At 00:52 04 June 2014, Karl Striedieck wrote:
Anyone know why the Duo (and supposedly other

Doppelsetzers) have the
same
minimum front seat weight with or without a person in the

back seat?

The rear seat moment arm has about 1/4th the effect

compared to the
front,
so I would think a 200 pounder in the rear would reduce the

front min
weight by 50 pounds - nicht wahr?

Maybe the numbers are based on a super cautious approach

for situations
like an instructor jumping out when the student solos and

forgetting to
recompute the cg?




My guess....The European High Command, EASA, has a strict

definition for
the format of the placard that MUST go in the cockpit. This has

a space for
only one configuration. If Shempp were to alter this it would

make the
aircraft unsafe to fly in Europe.

Jim




 




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