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Date: Wed, 29 Jun 2011 15:49:43 -0400
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Subject: Re: [LML] Re: Fin
From: Ronald STEVENS <Ronald@sdc.com>
Thread-Topic: [LML] Re: Fin
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Hi John

This is a nice idea about the 1500ft and the rounded arc approach, however
the Tower will not always agree with you, so I imagine you will have to
call 'unable' a lot. (Tight Pattern, Squared Pattern are calls that I have
heard many times from the tower), is it not then wiser just to go a bit
faster? 

And just for fun.....1500ft pattern would not be possible where I live,
our airport (7FL6) is right under Daytona Beach (KDAB) where our ceiling
is at 1200ft.

-- Ronald

On 6/29/11 1:14 PM, "John Hafen" <j.hafen@comcast.net> wrote:

>Giff:
>
>Good moves all.
>
>Additionally, I think in the early days, guys didn't consciously realize
>how much AOA increases with bank angle.  Flying square corners in a
>pattern, especially in the base to final turn, can stall the plane way
>too close to the ground to do anything about it.
>
>That is why HPAT recommends flying a 1500 foot pattern, and a roundish
>arc from down wind to final, rather than square corners from down wind to
>base, then base to final.
>
>John Hafen
>
>
>On Jun 29, 2011, at 8:26 AM, Giffen Marr wrote:
>
>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? From 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.
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