[NSRCA-discussion] Are these E-Meter readings OK

Tue Jul 31 20:17:47 AKDT 2007

Stuart, as Andrew said contact Kyle at Hacker. I had a slipped rotor (or
broken I don't really know) last year and they fixed it at no charger with a
very quick turn around.

Keith Black

----- Original Message ----- 
From: "Stuart Chale" <schale at optonline.net>
To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
Sent: Sunday, July 29, 2007 10:41 AM
Subject: Re: [NSRCA-discussion] Are these E-Meter readings OK

> Yes it has the Kevlar (yellow wrap).  I guess that didn't totally fix the
> problem.  Less than 100 flights.  Hopefully I can get them to send me out
a
> rotor and save the turn around time.  In the meantime I will get the next
> plane ready to fly.
> Thanks,
> Stuart
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of andrew
> Sent: Sunday, July 29, 2007 11:17 AM
> To: NSRCA Mailing List
> Subject: Re: [NSRCA-discussion] Are these E-Meter readings OK
>
> Stuart,
>
> Is the rotor look like it has Kevlar wrap around it? If not then the nose
> over probably had nothing to do with it as I cracked a rotor before. The
new
>
> motors have gone to a Kevlar wrap which decreases the chances of this
> happening. With that being said it still can and will happen. You did the
> right thing to stop and ask as it saved you in the long run.
>
> Andrew
> ----- Original Message ----- 
> From: "Steven Maxwell" <patternrules at hotmail.com>
> To: <nsrca-discussion at lists.nsrca.org>
> Sent: Sunday, July 29, 2007 11:09 AM
> Subject: Re: [NSRCA-discussion] Are these E-Meter readings OK
>
>
> > You've done nothing wrong mine had good ducting too, the problem is the
> > internal heat, the case always read normal temps on mine as I watched it
> > like a hawk.
> > Like Andrew said it's a good thing you was watching your MAH as it could
> > have cost you batteries and controller.
> > Looks like the only option right now is to replace the rotor if you
don't
> > fly all that much it might be the best option now for you.
> >
> > Steve Maxwell
> >
> >
> > From: Stuart Chale <schale at optonline.net>
> > Reply-To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
> > To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
> > Subject: Re: [NSRCA-discussion] Are these E-Meter readings OK
> > Date: Sun, 29 Jul 2007 10:46:48 -0400
> >
> > I certainly would rather not spend the money for another motor right
now.
> > My motor cooling is actually pretty good.  Oxai Pinnacle E.  The
openings
> > in
> > the cheek cowls are ducted directly to a plastic tube (old container)
> > around
> > the motor with about 3/16" spacing around the motor and ducted out at
the
> > rear of the motor.  It actually stays quite cool.
> > I wonder if this happened when trying to take off from grass and the
plane
> > nosed over stopping the prop (from low throttle, but as I was advancing
it
> > to start the takeoff).
> >
> > Thanks,
> > Stuart
> >
> > -----Original Message-----
> > From: nsrca-discussion-bounces at lists.nsrca.org
> > [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Verne
> > Koester
> > Sent: Sunday, July 29, 2007 10:34 AM
> > To: NSRCA Mailing List
> > Subject: Re: [NSRCA-discussion] Are these E-Meter readings OK
> >
> > Stuart,
> > This seems to be a common problem on standard C-50's, particularly if
> > they're not cooled properly. The comp version has a built-in fan that
all
> > but eliminates the problem and the ducting isn't nearly so critical.
> >
> > Verne
> >
> >
> > ----- Original Message -----
> > From: "Stuart Chale" <schale at optonline.net>
> > To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
> > Sent: Sunday, July 29, 2007 10:21 AM
> > Subject: Re: [NSRCA-discussion] Are these E-Meter readings OK
> >
> >
> > Never mind I answered my own question and pulled it apart.  For those
> > wondering, just pull off the front housing after taking off the gear box
> > and
> > the rotor pulls out.  There is a brass bushing on the rear of the shaft.
> > That was the only extra piece on mine. (standard C50)
> >
> > The rotor was cracked.  Circumferential about 1/4" from the front end.
> > The
> > distal part of the rotor had slipped by about 1/8".
> >
> > And I thought electrics were supposed to be less maintenance :)
> > Stuart
> >
> >
> > -----Original Message-----
> > From: nsrca-discussion-bounces at lists.nsrca.org
> > [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of
> > andrewjesky at charter.net
> > Sent: Saturday, July 28, 2007 9:14 PM
> > To: NSRCA Mailing List
> > Subject: Re: [NSRCA-discussion] Are these E-Meter readings OK
> >
> > Stuart,
> >
> > >From the sounds of it I'm thinking that you have a slipped rotor or a
> > demaged rotor. Normal amps should be in the upper 60's range. I would
> > advise
> > you not to run the motor until you get it checked out as you have the
> > possibility to burn up your batteries and speed control. Get a hold of
> > Kyle
> > at hacker on monday and inform him of your problem to get thoughts.
> > 480-726-7519
> >
> > Andrew Jesky
> > Sent via BlackBerry by AT&T
> >
> > -----Original Message-----
> > From: Stuart Chale <schale at optonline.net>
> >
> > Date: Sat, 28 Jul 2007 21:05:53
> > To:"'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
> > Subject: [NSRCA-discussion] Are these E-Meter readings OK
> >
> >
> > I have been noticing increased Mah consumption on flights recently. I
used
> > to routinely use 3300 Mah or so for a Masters routine plus a couple of
> > additional maneuvers. Lately it seemed to be in the upper 3's and today
I
> > hit 4100 Mah. The weather is a bit warmer but not real hot today.
Flights
> > are about 9 min +/- 1 min. In addition the packs seem to be getting
> > hotter. Today they were 140's. Motor was cool however, under 90 where I
> > could get a reading. These are Falcon F3A packs. 5000 Mah or so running
a
> > Hacker C50 14 XL and APC 22x12, Jeti acro 90 controller.
> >
> > Today I attached the Hyperion E-Meter and obtained the following
readings
> > at
> > full throttle 75.8 amps, 2500 something watts, and 32 something volts.
(I
> > lost the held readings)
> > When new with the same size prop my numbers were 70.9 amps, 33.81 volts
> > and
> > 2399 watts.
> >
> > The plane still has plenty of power. Are those numbers still in the
range
> > of normal? Is this increase of 5 amps at full throttle normal, too high,
> > or
> > am I just flying at high throttle more than I was?
> > Thanks,
> > Stuart Chale _______________________________________________
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