Resolution

[Jeff Hughes]

But, the work load is less, because the aileron movement is 25% less.

----- Original Message ----- 
From: "Tom Simes" <nsrca at shinymetalass.com>
To: <discussion at nsrca.org>
Sent: Wednesday, October 06, 2004 7:10 PM
Subject: Re: Resolution


> On Wed, 6 Oct 2004 15:08:03 -0500
> "Wayne Galligan" <wgalligan at goodsonacura.com> wrote:
>
>> A good question at this point would be.
>>
>> How much does the percentage of throw or ATV have an effect on total
>> power output of the servo?
>>
>> Like IF I use 75% ATV to achieve the throw I need.  How much effect
>> does that have on the total power output of my servo?
>>
>> Wayne G.
>
> Correct me - gently ;-) if I'm wrong, but I believe this simplifies to a
> lever problem and using 75% ATV increases the force required of the
> servo by 33%.
>
> Work = Force x Distance
>
> Moving a control surface through a distance requires a certain amount of
> work.  The control surface could care less whether that amount of
> work is the product of a large force and a small distance or a small
> force and a large distance.  However, obviously your servo and battery
> pack care and would prefer to exert a smaller force over a larger
> distance.
>
> Back to the equation, if we presume linkage losses to be a (hopefully
> small) constant, then the work done on the surface equals the work done
> by the servo.  If work is constant and distance is multiplied by 0.75
> (75% ATV), then force must be multiplied by 1/.75 (133%) to preserve the
> equality of the equation.
>
> -- 
> Tom
>
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