[NSRCA-discussion] Electric/Glow Pros and Cons

[george w. kennie]

When I went to the Nats I threw my bicycle in the back of my wagon along 
with the appropriate bike togs and cleated shoes. I think it was Monday nite 
I decided to do a few laps around the complex to keep the fitness level in 
my legs. Well, in case you're wondering how hot it gets inside your car at 
Muncie during the day with the windows all the way down, when I picked up my 
shoes to put them on the heat had melted the shoe-glue that held the soles 
to the bottom of the shoes and they fell off in my hands.This glue has got 
to be normally quite strong, as when you pedal, you do considerable lifting 
with the upward traveling foot and significant  force is exerted on the 
soles and they usually stand up to this kind of stress under all weather 
conditions.
The point is that I also had some lipos in the car and they still seem to be 
functioning normally, in fact I flew a pack this A.M.and it's about 3 years 
old and has never been balanced (now watch, it'll blow up tomorrow).
Oh yeah, I had pumped up the bike tires before leaving home and one of the 
tires exploded from expansion just sitting in the heat of the car internals 
(,but the batteries are still working). I think that it will be quite a 
while before the widely varying battery experiences settle into some form of 
normancy a la nicads.
G.



----- Original Message ----- 
From: "Fred Huber" <fhhuber at clearwire.com>
To: <nsrca-discussion at lists.nsrca.org>
Sent: Tuesday, August 08, 2006 11:30 PM
Subject: Re: [NSRCA-discussion] Electric/Glow Pros and Cons


> Do not leave the LiPos in the car fully charged. (at least not where the 
> sun
> can get at them)
>
> There have been a couple of instances of unknown cause Lipo ignition in 
> hot
> cars... I think I found it (I got lucky)  Had a charged lipo in my car
> overnight and went out to unload the car about noon... found one swelled 
> up
> LiPo. (luckilly one of my cheaper ones)
>
> Not sure how hot it got inside the car but it was enough to cook the 
> battery
> (which was where the sun could get at it through the car window...)
>
> But then... the sun can heat your glow fuel can and pop the can.  And for 
> a
> "neat trick" put an empty ("sealed" can in the car on a hot day, leave it
> overnight.. check the can out in the morning.  The new Powermaster cans 
> will
> come out looking like they went through a trash masher.
>
> If your TX is left on the seat in the car, you can badly deform the case.
> (gimbals may or may not still work)
>
> Hot cars and RC stuff just don't get along well.  Its not just the 
> LiPos...
>
>
> ----- Original Message ----- 
> From: "Richard Strickland" <richard.s at allied-callaway.com>
> To: <nsrca-discussion at lists.nsrca.org>
> Sent: Tuesday, August 08, 2006 5:36 PM
> 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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>>
>>
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