[NSRCA-discussion] Servos suggestions for a 90 size pattern plane

[Bill's Email]

Vicente "Vince" Bortone wrote:
>
> Mike,
>
>  
>
> I agree.  I am flying the same plane electric and glow (Abbra).  The 
> electric uses around 50-60 mah and the glow 150-200 mah per each 
> Master round.  This is about 1/3 of the power.  For sure, electric 
> planes can use smaller servos.
>
>  
>
> VB
>

My Abbra has 3421SA on the elevator (one per half). As far as the 
difference in amp draw that is mostly due to the servo not having to 
constantly fight the vibration of the engine to keep the surface in the 
commanded position. The surface size and loads on it during flight are 
the same, but the work the servo needs to do is greater when it also has 
to dampen the engine vibration. I am not sure that a bigger servo is 
needed for this so much as a bigger battery since it burns up more juice.

Keep in mind as well that if you do go to a smaller servo it also has a 
smaller geartrain and this may be more likely to fail under load if you 
try to go too small.





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