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HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › pros and cons of lipos over Nicad?
01-20-2010 05:27 AM  8 years agoPost 21
dkshema

rrMaster

Cedar Rapids, IA

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I hook up the first aircraft and tx to fly to the Quick field charger to top it off and keep it trickle mode. About halfway to 3/4ths of the way there, it's in trickle mode and ready to fly.

Can this be done safely with a lipo?
Judge for yourself --

https://rc.runryder.com/t519305p1/

Best not to charge in your heli, either, it can end up the same way.

And don't leave them unattended while charging in the house.

Treat them with respect, you'll have a good time. Let down your guard, you can have some serious trouble.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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01-20-2010 05:16 PM  8 years agoPost 22
777ER

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Westchester county, NY, USA

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Seen those pics before but didn't see the thread with the details on the van fire

Is there a problem if you crash and the lipo is impacted? ie fire breaking out?

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01-20-2010 07:33 PM  8 years agoPost 23
dkshema

rrMaster

Cedar Rapids, IA

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Is there a problem if you crash and the lipo is impacted? ie fire breaking out?
Yes. If the crash punctures the LiPo, there is a distinct possibility of a very hot fire that will consume your heli and the ground around it. Even if the LiPo isn't punctured, if it is damaged, it may still catch fire. These events are not "common", but they happen.

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Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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01-20-2010 07:39 PM  8 years agoPost 24
chopper_crazy

rrElite Veteran

Delphos, Ohio

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Most all of the pros and cons have been stated in this post. I made the switch last year and have really liked it. It just seems easier. I also race rc cars and we have switched from using nicads and nimh batteries and started using lipos. The consistancy is incredible. They hardly fall off at all. I really like them.

It's a complex, costly, glow powered anti-gravity machine!

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01-21-2010 01:14 AM  8 years agoPost 25
777ER

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Westchester county, NY, USA

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Sounds promising but I'd approach lipo's with caution.

Do you put them in a special bag or a metal box while charging them?

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01-21-2010 03:27 AM  8 years agoPost 26
jschenck

rrProfessor

La Vista, NE.

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+2 LiFePO4 / A123 cells. That is the direction my RX packs are going.

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01-21-2010 08:58 AM  8 years agoPost 27
Four Stroker

rrElite Veteran

Atlanta

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A typical battery pack failure is a single cell dropping to 0 volts. Try running your airborne stuff on a single A123 and see what happens. It will probably run just fine on 3 NiCD's (or 4 NiCD's). Futaba digitals drop out at about 3.2 volts. I haven't tried other brands.

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01-21-2010 01:15 PM  8 years agoPost 28
dkshema

rrMaster

Cedar Rapids, IA

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Charging and storage safety:

People use these:

http://www.liposack.com/

As well as other solutions. I believe there is a ceramic container that's available. Others use old ammo boxes from the Army Surplus store, crock pot linings, metal boxes, charge outside on non-flammable surfaces.

For the most part, the mishaps that occur are the exception, not the rule. But beware that they CAN and DO happen.

Use common sense, learn the do's and don'ts, and follow them. Treat a damaged battery with caution until you're sure it's OK. If it puffs up, it's a goner. Dispose of according to the published methods.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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01-21-2010 01:27 PM  8 years agoPost 29
Pistol Pete

rrProfessor

Seffner, FL

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Do you put them in a special bag or a metal box while charging them?
peace of mind equals about $6 for an ammo can available just about anywhere these days.

~~Enjoying the hobby one flight at a time~~

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01-21-2010 06:29 PM  8 years agoPost 30
777ER

rrApprentice

Westchester county, NY, USA

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So what lipo would you recommend for a 90 with futaba 2.4GHz 12ch RX, spartan gyro, multigov, coreless servos all around?

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01-21-2010 11:58 PM  8 years agoPost 31
dkshema

rrMaster

Cedar Rapids, IA

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cordless servos
Wow. WiFi servos. I guess I'd suggest either servos with cords, or coreless servos. But not cordless ones....

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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01-22-2010 01:12 AM  8 years agoPost 32
777ER

rrApprentice

Westchester county, NY, USA

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cordless servos
Wow. WiFi servos. I guess I'd suggest either servos with cords, or coreless servos. But not cordless ones....
LOL I meant coreless servos, not cordless as it sounded.

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HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › pros and cons of lipos over Nicad?
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