Thread Tools
Old Nov 28, 2004, 08:52 PM
jim florentine is offline
Find More Posts by jim florentine
Registered User

how do I test the amp draw on my lipo batt


can anyone help me out with this I dont know how to test this, do I need a special hobby wattmeter or can I use a volt meter, please please help me I need to know,
Sign up now
to remove ads between posts
Old Nov 28, 2004, 09:08 PM
Miami Mike is offline
Find More Posts by Miami Mike
Registered Taranis User
Miami Mike's Avatar
Batteries don't draw current, they supply it, so it's not clear what you want to test. If you want to test the current draw of a model's power system then you should use a meter like the ones from AstroFlight. If you want to know how much current your battery can safely supply, you'll need to find out what the manufacturer recommends.
RCG Plus Member
Old Nov 28, 2004, 09:10 PM
PerfectStranger is offline
Find More Posts by PerfectStranger
one game away...
PerfectStranger's Avatar
i have used an astro whatt meter and now use this one by RC Electronics.

don't fly without knowing the current you're drawing from your packs. especially if it is a lipo pack.

matt
Old Nov 28, 2004, 09:13 PM
Doug Sipprell is offline
Find More Posts by Doug Sipprell
Elfi Flyer
Doug Sipprell's Avatar
I believe your best bet would be to get a Wattmeter from AstroFlight. This device will give you amps, volts, and watts, all in one easy to read display. You definitely need to know the amp draw on our LiPo pack(s) in addition to the amp draw thru your speed control (ESC). There will be a definite "specific energy" or watts value that provides the best performance to the plane, based on the battery, motor, prop. I consider the Wattmeter to be one of the most important measuring devices for my electric fleet. A mulit-meter could be used, you would have to first measure voltage, then amperage, then multiply these values to arrive at watts. It would be much more convenient to use the Wattmeter. This device is marketed thru most R/C vendors, including AstroFlight.


RD
RCG Plus Member
Latest blog entry: Big Red Cadillac
Old Nov 28, 2004, 09:51 PM
rkramer is offline
Find More Posts by rkramer
Frequent flyer
also, lipos aren't really something you want to 'test' the current draw of, as once you hit the limit the pack is done... it lets you know by heat & swelling, &/or a very reduced lifespan.
Old Nov 28, 2004, 11:22 PM
14U2NV is offline
Find More Posts by 14U2NV
Registered User
14U2NV's Avatar
Do any of these do any data logging other than peak and minimum readings?

I'd like something that logs all current and voltage data for an entire flight. Anything like that out there?

John
Old Nov 28, 2004, 11:31 PM
ebill3 is offline
Find More Posts by ebill3
Registered User
ebill3's Avatar
John - If you want in-flight logging, take a look at:
http://eagletreesystems.com/
Old Nov 29, 2004, 12:38 PM
hall woo is offline
Find More Posts by hall woo
Permanently Banned
I used a 30 amp shunt meter ( $1 surplus) to monitor current from a battery pack, just have to wire the battery adaptor connectors with short 14 gauge wire


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
How do I repair the wing surface on my E-flight Ascent? LBM Electric Plane Talk 5 Sep 09, 2009 11:46 AM
How do I measure Amp draw? buzzbee Beginner Training Area (Aircraft-Electric) 5 May 23, 2004 12:40 PM
How do I check Amp draw? FX1SUB Parkflyers 6 Sep 06, 2002 05:00 PM
HELP! How do I set the Correct CG on my ASW-22? marmal43 Electric Sailplanes 0 Aug 08, 2001 03:33 AM
how do i reverse the servo and esc on my old radio? Sonic Electric Plane Talk 7 Jul 09, 2001 12:55 AM