View Full Version : FlightPower 3700 to 4350 Size Comparison + LiMn Test Packs
WillJames
08-01-2006, 08:54 PM
Got a chance to do a photo to compare the size of the EVO 20 3700 vs the 4350 packs today. The 3700's weigh 1.10 Lbs each and the 4350's weigh 1.25 Lbs each.
There are also some 3800 Li-Manganese Test Packs from Duralite in the photos. So far after 1 cycle the Li-Mn did very well. Flew 5 minutes with the Ion-X and only put back 2300mah!! Time will tell how the power comes on and how they hold up. The Li-Mn packs weigh 1.20 Lbs each.
rfaster
08-02-2006, 11:09 AM
Will - is the expectation that these packs will give a minute or 2 or 3 more than the 3700's?
OICU812
08-02-2006, 06:44 PM
Yea I'd like to know if these are the "ticket" for the Ion as well ?? :D
WillJames
08-03-2006, 04:10 AM
Will - is the expectation that these packs will give a minute or 2 or 3 more than the 3700's?
I can already get 1 minute more out of the 4350's than the 3700's after 6 cycles on them. I doubt we will see much more than a minute or so without over stressing these packs if you push the heli although with very mild flying, I guess it is possible. The temps seem to be a little cooler after the 5 minute flight than the 3700's but I have not pushed them that hard yet until after at least 10 cycles.
After 4 cycles, the Li-Mn packs have proven that either they cannot handle the high discharge rate of my Ion-X setup or the wire is to small to handle the current or something inbetween. They start to voltage drop pretty bad after about 3 minutes if you really push them and they also run a lot hotter than the Li-Po packs. The wire on them looks at least one gauge smaller than the beefy wire on the EVO packs. If I do consecutive stationary flips with the machine, after about 6 or 8 you can see and hear the voltage drop. For comparison I can do a BUNCH of the stationary flips with the EVO packs and not experience the voltage drop. Also my 77-O and 32-3 are getting a lot hotter with the Li-Mn packs than I am used to with the EVO packs, I suspect the smaller gauge wire has something to do with it.
poerqwa
08-03-2006, 10:59 AM
Can you post the exact measures of the 4350 pack?
Greetz,
Marc