[NSRCA-discussion] ESC Motor Combo

[Peter Vogel]

Sounds like a Castle ESC in "Auto" endpoint mode.  The correct way to
handle one of those is to arm at FULL throttle and then drop to zero
throttle, that way the ESC knows the high + low end points.  If you arm at
low then it "guesses" at the top end point in the first few seconds after
it gets a signal above zero, hence a slow advance of the throttle confuses
it.  (Castles are designed for sport fliers who think a takeoff is full
throttle immediately).

Personally, I *hate* the idea of arming a system at full throttle, so with
a castle ESC (I think I'm down to 1 of those in my hangar at this point) I
set up fixed end points right away.

Peter+


On Wed, Jul 30, 2014 at 1:03 PM, Scott McHarg via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> Hi guys,
>
> I need a little help.  My buddy has just recently bought a Mythos 125 and
> has gotten frustrated with it.  The setup is the HACKER A60-7XS V2
> <http://www.f3aunlimited.com/catalog/product/view/id/661/s/hacker-a60-7xs-v2/category/53/> and
> a Castle HV85 ESC.  He recently went to this motor so that he could fly 8S
> packs which he is currently running.
>
> Recently, he brought the plane over to the house and wanted me to have a
> look.  Before I dive into it (which I haven't yet) by looking at the
> logging on the ESC, etc., is there anything wrong with this combination?
>  I've always flown Castle ESCs myself but I remember reading on here not
> too long ago about how the Q80 and the Castle controller don't really get
> along.  I mainly want to make sure that this doesn't apply to this
> combination as well.
>
> I know there are a ton of variables and again, I haven't begun to dig into
> it.  Essentially, if you start at idle and bring the throttle up slowly as
> if you were in the air flying transitioning from a down line to horizontal,
> the RPMs only increase slightly even to full throttle.  Two takeoffs were
> aborted due to this.  If you jam the throttle from idle to full throttle,
> the motor comes alive and performance is spectacular and it will act fine
> with smooth transitions for a period of time if not the rest of the flight.
>
> Just mainly making sure there are no specific hangups with this combo that
> y'all can think of.
>
> Thanks,
> Scott
>
>
> *Scott A. McHarg*
> VSCL / CANVASS U.A.V. Pilot Texas A&M University
> PPL - ASEL
>
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>



-- 
Director, Fixed Wing Flight Training
Santa Clara County Model Aircraft Skypark
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