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Date: Wed, 29 Jun 2011 11:26:07 -0400
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From: Giffen Marr <gamarr@charter.net>
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Subject: Fin
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Before I started to build my IV-P, I reviewed the accident history of =
the IV.What I found was a significant number of stall spin accidents in =
the IV. Why a higher rate then other aircraft? =46rom my analysis, I =
felt there were two reasons, one,the aircraft tended to have an aft CG, =
and two, the tail became blanketed in the spin, causing difficulty in =
recovery. My un-flown solution was to move as much weight forward as I =
could, add stall strips, add the ventral fin and add about 48 square =
inches of area to the rudder trailing edge. You must also remember that =
when you retract the gear, the cg moves aft about 2 inches. With an aft =
CG, the aircraft will tend to go flat in the spin, which makes recovery =
difficult.

Giff Marr
N229GM
1st engine run before AirVenture.=