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Home✈️Aircraft🚁Helicoptere-Electric General Discussion › How do you charge at the field....still new at this.
09-14-2009 07:05 PM  11 years ago
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rcuser

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Apopka FL

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How do you charge at the field....still new at this.
Hello again,

Im having a blast with my first CP. a trex 450. I'm thinking of joining the local flying club here in orlando. Is there a way to charge batteries out at the field? I usually see cars/trucks with their hoods propped open. Are they using the car battery to power things? and wouldn't that kill the car battery?

Wondering if I can charge out there or IF i'm stuck and have to bring a supply of charged lipos to the field for the day.

Thanks
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09-14-2009 07:11 PM  11 years ago
USNAviationjay

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Houston Tx USA

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We have power at our club we just plug in and charge.

but yes at clubs with no power people use car batts as well as generators to recharge.
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09-14-2009 07:22 PM  11 years ago
Shef

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New York, NY

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Can a car battery handle the draw from a charger without any problems?Former owner of T-Rex: 250, 450 V2, 500ESP V-Bar, 600ESP V-Bar, 700E 3G
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09-16-2009 02:15 AM  11 years ago
stanc

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Conroe, TX

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Can a car battery handle the draw from a charger without any problems?
That would depend on the charge rate your charging at and the voltage of the pack.
Are they using the car battery to power things? and wouldn't that kill the car battery?
Lets say you did run your car battery down so the car wouldn't start and lets go farther and say you and no one has jumper cables. I wonder if anyone asking this question ever thought about using one their Lipo Packs to jump the car. I've had several occasions where someones battery went dead and no one had cables and I just took one of my 5S packs and jumped the car. Believe me the starter on the car never spun that fast before, only takes a second to start the car.
Stan
2- Logo 500
Ion X2
eAvro90
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09-16-2009 02:36 AM  11 years ago
GyroFreak

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Orlando Florida ...28N 81W

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I just took one of my 5S packs and jumped the car.
I'v been wondering when car mfg and motorcycle mfg would start using LIPOS instead of lead/acid. They are always looking for wieght savings and that would be a BIG weight savings. As for fire danger, it would be confined to the engine compartment in a "lipo" type bag.
I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?
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09-16-2009 02:41 AM  11 years ago
GyroFreak

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Orlando Florida ...28N 81W

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For trex 450 with a 3s 2100mah battery, full charge will consume approx 24 watts. If I remember right a car battery in good condition is about 80 amp hours so 80 X 12V =960 watts. Thus in theory you could get 960 / 24 charges into your trex. Thats about 40 charges per full car battery.
Since most chargers are of switching power supplies the efficiency is very good, over 90%. So using 90% then that 40 becomes 36 charges to your Trex.
I think about the hereafter. I go somewhere to get something, then wonder what I'm here after ?
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09-16-2009 04:21 AM  11 years ago
Zaaaguy72

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MN

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Get a generator, well worth it.Team Sanjel!
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09-16-2009 09:28 PM  11 years ago
Shef

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New York, NY

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what about if the car is running...would it still drain the battery?Former owner of T-Rex: 250, 450 V2, 500ESP V-Bar, 600ESP V-Bar, 700E 3G
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09-16-2009 10:39 PM  11 years ago
chopper_crazy

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Delphos, Ohio

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there are some guys that charge from their car. Me personally, I don't want to do any maintenance, charging, etc. at the field. I buy enough batteries to fly while I'm at the field and then come home and charge them. Always worked well for me.It's a complex, costly, glow powered anti-gravity machine!
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09-17-2009 01:42 AM  11 years ago
rcuser

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Apopka FL

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i'm flying electric for the convenience of reducing the amount of gear I have to lug with. So getting a generator which is heavy and having to fill with fuel may defeat my purpose.

As for charging via the car battery, due i just hook the charger cables (normally going to the power supply) to the battery + and - terminals directly? can i do this while the car is running? Or do i do it with the car off and hope that i don't use all the batts?

Finally will the used battery recharge fully via the alternator when i drive home? OR am i looking at having to buy a new car battery soon.
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09-17-2009 02:27 AM  11 years ago
FlaG8r

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Florida

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Not sure if this guy was charging with his car or not...

http://runryder.com/t519305p1/?highlight=lipo+fire
Life is tough, it's tougher if you're stupid
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09-21-2009 04:56 PM  11 years ago
kc7328

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Kansas City

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battery
RCuser..

might want to think aboout going to Wal-mart and grabbing a deep cycle marine battery for about $65.
These are really made to be used and recharged.. and this would eliminate any worries about your car battery..

pending the charger you have for your lipos, it might be able to charge up the marine battery to.. if not.. you can get a charger for very cheap to replenish it.. lot of folks at my field do this as we do not have power there.. and some of the guys just dont want to put the wear and tear on their car battery.

and yes.. you would hook up the charger leads directly to the battery.. if you go the marine deep cycle battery route.. you might want to get some battery posts to be able to clip your charge leads to .. or multiple leads if you have more than one charger ..
Alimony is like buying hay for a dead horse !!!
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09-21-2009 05:08 PM  11 years ago
Hellsiege

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Colorado Springs, CO

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+1 for the wally world batteries. I have the 29.99 import car size battery and it works great. 10-15 charges at the field typically when using 3s/4s lipos. If I could find a small marine one like this I'd use it but the $65/one is full size. It's my 6s@5000 packs that seem to wear it down the 29.99 version pretty quick.

Starting the vehicle though and letting it run for even 5 minutes or so does wonders for recharging the battery in your car. Most alternators put out a serious charge rate that is noticeable even after such short durations with a volt meter.
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09-22-2009 04:21 AM  11 years ago
rcuser

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Apopka FL

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battery

RCuser..

might want to think aboout going to Wal-mart and grabbing a deep cycle marine battery for about $65.
These are really made to be used and recharged.. and this would eliminate any worries about your car battery..

pending the charger you have for your lipos, it might be able to charge up the marine battery to.. if not.. you can get a charger for very cheap to replenish it.. lot of folks at my field do this as we do not have power there.. and some of the guys just dont want to put the wear and tear on their car battery.

and yes.. you would hook up the charger leads directly to the battery.. if you go the marine deep cycle battery route.. you might want to get some battery posts to be able to clip your charge leads to .. or multiple leads if you have more than one charger ..

Eat a live toad every morning and nothing worse will happen to you the rest of the day!!
this sounds feasible, thanks
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09-22-2009 12:10 PM  11 years ago
FlaG8r

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Florida

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IF your field has AC outlets, just buy a power supply. No point in buying a marine battery that your going to have to charge eventually.Life is tough, it's tougher if you're stupid
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09-24-2009 05:54 PM  11 years ago
rcuser

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Apopka FL

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FlaG8r: IF your field has AC outlets, just buy a power station. No point in buying a marine battery that your going to have to charge eventually.

Compass Model/CSRC Field Rep
Not familiar with a power station for rc...do u have a link with a pic? and GO GATORS!
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09-24-2009 06:48 PM  11 years ago
Hellsiege

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Colorado Springs, CO

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I think he meant to say "power supply" takes AC and converts to DC. They vary in output voltages and output amperage, so keep these two things in mind when purchasing. I have a 20a PC power supply that I use and it works great on the hyperion duo. I don't use it at the field much as hauling my camping generator out there is a PITA sometimes....
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09-24-2009 07:28 PM  11 years ago
Chuck Bole

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Tulsa Ok. U.S.A.

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I guess i'm spoiled, we have AC power at our feild. I just use a RadioShack 25amp power supply to run the chargers. Used to use a Marine battery before the club broke down and ran power to the tables..
chuck
Team Synergy Field Representative / Rail Blades / Scorpion Power Systems / HeliLids
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09-25-2009 12:28 AM  11 years ago
FlaG8r

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Florida

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Yeah, power supply.Life is tough, it's tougher if you're stupid
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