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Date: Mon, 18 Jul 2011 13:55:33 -0400
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From: "F. Barry Knotts" <bknotts@buckeye-express.com>
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Subject: Re: [LML] Re: Electric flaps
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Thanks, Colyn.

The panel on my to-be-completed IV-P project will utilize the Vertical 
Power Dual VP-200 power panel.  It has included in it the components for 
the control and indication of the position of the flaps.  It was 
originally designed for the Legacy, I think.  The major advantage that 
the electric flaps have with the VP-200 is that the flaps can be 
positioned by a single momentary toggle tap to a predetermined 
position.  Multiple positions can be set up in the VP-200 (10 degrees, 
20 degrees, full, etc.)

Ten degrees always seems so vague to me.  (Is it nine degrees, or does 
that look more like thirteen degrees?)  (Does it matter?)

The other plus...remains to be seen...is the reliability of replacing a 
hydraulic system for an electrical system.  This is something to be 
determined.  Of all the systems in my flying IV-P, the hydraulic system 
has been one of the most reliable.  (Certainly behaving better than the 
electrical/avionics systems.)

I suppose weight is also a factor.  Relatively small difference, I 
think.  But I did remove a few lengths of hydraulic hard lines and a few 
bits from the control head.  More important, I reduced the number of 
sites of potential hydraulic leaks, especially in the cabin.

That leaves the hydraulic system one task.  Raising and lowering the 
gear.  I hope to have reduced the number of failure points in the 
hydraulic system by eliminating the hydraulic system from the flaps.  I 
can still land gracefully without flaps.

Barry Knotts

On 7/18/2011 12:26 PM, Colyn Case wrote:
> Nice post Barry.    Although I can imagine the reasons I wonder what 
> YOUR reasons were for switching to electric.
>
> On Jul 17, 2011, at 10:11 AM, F. Barry Knotts wrote:
>
>> For Brian Campbell:
>>
>> I was unable to penetrate your spam filter directly, so here's some 
>> info on the installation of electric flaps in a IV-P.  The photograph 
>> files