[NSRCA-discussion] Electric/Glow Pros and Cons

[White, Chris]

I have a question / observation that maybe someone can clear up for me:
I've noticed recommendations to break in some electric motors while
immersed in water....Is that for real??? (does it only apply to brushed
motors..???)  I have had an Ace Puddlemaster flip upside down to dunk
the pylon mounted can (brushed Speed 600) motor and it all runs fine
after drying....although I don't know the status of that motor 5 years
later...:)

Chris White

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Fred
Huber
Sent: Wednesday, August 09, 2006 2:19 PM
To: NSRCA-discussion at lists.nsrca.org
Subject: Re: [NSRCA-discussion] Electric/Glow Pros and Cons

The way the brushless motors are made.... corrosion is the biggest issue
for 
the motor itself.  They should work submerged in a bucket of water.

The ESC would need to be kept dry.  Water getting under the heat shrink 
could cause it to short.  First effect I would expect is confusing the 
programming's sensing of the motor rpm, blowing the synchronization
(shuts 
down the motor.)

The batteries should be reasonably resistant to a little rain.  Don't
want 
to get them wet enough to cause a short though.  Depends on if they used

good insulating materials in the pack... or like has been found in
some... 
paper based masking tape.  The masking tape plus water and you may as
well 
have a low value resistor.

Overall... if the average modeler is willing to stand in the weather
(rain, 
snow, sleet....) the model can probably handle it with little or no
added 
protection.

----- Original Message ----- 
From: "Steven Maxwell" <patternrules at earthlink.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, August 09, 2006 2:04 PM
Subject: Re: [NSRCA-discussion] Electric/Glow Pros and Cons


> Here's another question for electrics, at the Nat's Thursday it was
light
> rains on and off, I'm pretty sure at least one l fight was made in a
light
> rain, brushless motor have no brushes but I would think you still
wouldn't
> want to get wet or even damp, we've had light rain here all day and
was
> planning on going flying but with an outrunner where is the stopping 
> point?
> Also I when my other motor went belly up I put my batteries in the
frig at
> a 3.85 volt per cell storage charge as recomended by manufacture but
> noticed condesation when I
> removed , I wouldn't think that would be good for any wiring, concacts
and
> tabs. They was kept in a Brinks firesafe all the time.
> I also carry them in the van at all times in the firesafe temp have
never
> been a problem in the case ( no direct exposure to sun) smaller packs
kept
> in battery bunker with same thing no heat build up.
>
> Steven Maxwell
>
>
>
>
>> [Original Message]
>> From: Earl Haury <ehaury at houston.rr.com>
>> To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
>> Date: 8/9/2006 2:31:40 PM
>> Subject: Re: [NSRCA-discussion] Electric/Glow Pros and Cons
>>
>> I also have a 110 / 12V fridge / heater. The thing is preset @ 45F
for
>> cooling & 140F for heating. To prevent condensation the cooling level
> needs
>> to be above the dew point - probably 75F around here. The packs I'm
using
>> (Falcon F3A) don't seem affected by lower temps - so I only use the
> heater
>> for a hand warmer on those cold Houston winter days when it gets down
> around
>> 50F. I've a "to do" item on my list to look at the controls of this
thing
> to
>> see if I can change the set points.
>>
>> Earl
>>
>> ----- Original Message ----- 
>> From: "Richard Strickland" <richard.s at allied-callaway.com>
>> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
>> Sent: Wednesday, August 09, 2006 11:16 AM
>> Subject: Re: [NSRCA-discussion] Electric/Glow Pros and Cons
>>
>>
>> > Certain manufacturers/assemblers are saying internal condensation
could
> be
>> > a
>> > problem from cooling. I did buy a little electric Coleman cooler
for
> about
>> > 50 bucks at Cabelas (3 amps).  Once I get back in the groove (if
ever),
>> > I'll
>> > probably plug it in at noon at lunch, and then again on the way to
the
>> > field
>> > that eve.  Just enough to keep the temps reasonable.  But it's just
>> > another
>> > 'thing'.
>> >
>> > RS
>> >
>> > -----Original Message-----
>> > From: nsrca-discussion-bounces at lists.nsrca.org
>> > [mailto:nsrca-discussion-bounces at lists.nsrca.org]  On Behalf Of Jay
>> > Marshall
>> > Sent: Tuesday, August 08, 2006 5:40 PM
>> > To: 'NSRCA Mailing List'
>> > Subject: Re: [NSRCA-discussion] Electric/Glow Pros and Cons
>> >
>> > Sounds like a foam cooler and a bag of ice should keep them cool.
>> >
>> > -----Original Message-----
>> > From: nsrca-discussion-bounces at lists.nsrca.org
>> > [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of
Richard
>> > Strickland
>> > Sent: Tuesday, August 08, 2006 6:36 PM
>> > To: nsrca-discussion at lists.nsrca.org
>> > Subject: [NSRCA-discussion] Electric/Glow Pros and Cons
>> >
>> > Just having a debate with myself on the pros and cons for the long
>> > haul.....
>> > Seems like it's been hovering around 95-100F around here since
early
> June.
>> > I'm not liking the fairly significant batt. temp. rise from
ambient.
>> > (batt.
>> > life issues)  The batts have to sit in a fairly hot car all
day-charged
>> > for
>> > practice in the evening.  I have to make a decision the nite b4 to
fly
> or
>> > not the next day to charge.  Batteries are still damned expensive
even
> if
>> > you get a decent deal and the jury is still out on longevity  Gotta
> grease
>> > things fairly often.  Heavy.   But they are cleaner and easier to
> manage
>> > at
>> > the field.   Glow engines, when driven to the max-like I do-tend to

>> > have
>> > their own share of issues, somewhat messy, and require more field
>> > equipment
>> > at the line.  The bigger units require A LOT of fuel to make all
that
>> > power.
>> > But I feel I can fly them no matter how hot it is and not worry
about
> them
>> > (as much).  Deciding to fly is a matter of just GOING.
>> >
>> > I'm just throwing this out there in case anyone else is having
similar
>> > thoughts... ho-hum...
>> >
>> > RS
>> >
>> >
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