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

[Verne Koester]

I don't have the expertise to even speculate on that. Do you recall if 
that's when your battery usage went up?

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 10:46 AM
Subject: Re: [NSRCA-discussion] Are these E-Meter readings OK


>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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