ORIGINAL: dragonfly60
Kahloq,
What battery packs were you using that sagged, and how old/cycles wee they?
i've converted all my larger planes to glow/gas now, lost several on battery power, problem is when your glow/gas plane goes in you usually don't damage your motor, with ALL my 'sparkie' crashes either or both motor and batteries were destroyed[&o] makes for a very expensive crash!!! I wouldn't be concerned with the power/speed of the gas motors, it's easy to use a larger pitch prop to get the scale speed you want.
Cheers, Paul.
The batts were the 5s 4800 Zippy-R white shrinkwrap variety with no label from Hobbycity. I bought them 2 years ago and they dont sell them anymore. I probably had at least 50 cycles on them in various planes, but they never gave any hint of sagging until today....so i was taken by surprise. However, I should note that I havent flown the 109 in awile and had been flying my Kysoho 190 a lot using the batts one at a time. That plane is much less power hungry so the batts may have been starting to fade without me noticing until today.
Funny how a batt can read full voltage and then sag pretty bad.
Anyhow...not sure what Im going to do. I can still use the power 160 again in the new plane as I have other 5s 5000 mah turnigy and flightmax batts already on hand and those are pretty new.
I have a satio 180 in my ESM/KMP Me-109 and it flies quite well with a 16x8 prop. I just didnt want a cylinder head poking out the bottom since this CMP plane looks so good. I think on it for a bit.