|06-24-2004, 12:42 PM||#1|
RCC Senior Contributor
I am: Mike P
Join Date: Jun 2004
Location: Milton, Ontario
Feedback: 0 / 0%
Total Props: 0
Ni-Cd vs Li-Poly
Remove this ad - become a site supporter!
I've been flying R/C glow aircraft for about three years and I'm just starting to get into electrics. I'm building an electric 8% scale Piper Cub but I'm not sure what to power it with.
The model will be running a GWS IPS A motor with a GWS R4P reciever and two servos. The plans call for 6 120mAh Ni-Cds or 2 230mAh Li-Polys.
I've heard that the Li-Polys pack a lot of power into a small space but I've also heard that they can easily damage or even explode. Just wondering what the best power option is. I've attatched a picture of the model's interior.
|06-24-2004, 01:30 PM||#2|
RCC Supreme Contributor
I am: Jim McIntyre
Join Date: Aug 2002
Location: Claremont Ontario
Radio of choice:
# of RCs: 999
Feedback: 1 / 100%
Total Props: 1
I'm a big fan of LiPo but, like you said, they must be handled correctly.....
If you go LiPo, get a decent charger and be sure not to exceed the maximum output current or discharge too far..
I run a 2S pack in my GWS Tigermoth and I'm getting about 50 Minutes runtime!
I run a 2S pack in my Century Hummingbird (heli) and I'm getting over 20 minutes (used to get 4-6 minutes on the NiMH pack).
I'm finishing up a similar setup in a PT19 running 4 LiPo cells in parallel for longer runtime. I used to run NiCads (8X1600) with a lot more weight and a lot shorter runtime.
IMHO, Li-Poly is worth taking the added precautions.
Si fractum non sit, noli id reficere - (If it ain't broke, don't fix it).
|06-24-2004, 01:40 PM||#3|
RCC Junior Contributor
I am: Jean-Guy
Join Date: Mar 2004
Location: Dubreuilville Ont
Feedback: 4 / 100%
Total Props: 0
well,go with lipo's U'l never look back.just make sure u read as much info as you can On lipo pack(the do's and dont)
I've been flying with lipo for the past 4 month and Im pretty Happy with them.For charging Im using charger called"BELL"Its good for 2,3 cell and cost $40,My setup is brushless Im using Apogee 830 3S pack,weight under 2 oz and get 15 min of solid flying,I also have 2 Ethec 1200 3s pack and get 23 min of flying time,this is agressive flying(3Dflying). You have to keep in mind that if you are not using a speed controller with auto cut off voltage,you will have to fly for like 5 min,land and check voltage untill you figure out how long U can fly on a charge.I beleave the 2S pack as to be ketp no lower then 6 volts.Mine is a 3S pack so the LCV is set to 9 volts.
I get all my stuff electric stuff at Zebrahobby,Exellent service
hope this helps
there is one stunt most of us aren't proud of
|Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)|