ORIGINAL: aeajr
ORIGINAL: PipeMajor
ORIGINAL: aeajr
If you are flying on 50 and don't run into conflicts, then you dont' really need the synth module. The synth adds about 50% to your battery drain, so you will have shorter battery life with the synth module.
Hmmm. I would dispute that. I just bought a new 9CAPS system with the FSS sythesized TX module and the R319DPS RX. I charged the supplied 700mAH TX pack for 16 hours for it's forming charge. I turned on the TX and let it run until it started beeping a low battery warning.
It ran 2.75 hours. Not bad for a NiCD pack which is still probably not optimized yet. I don't yet have an RX pack but will likely go with a 1600+mAH NiMH or better since this system will be used in a 7 servo UltraSport 40.
That is pretty good. Perhaps my understanding of the drain was mistaken.
Actually I don't think you're that far off. The TX w/FSS modules seems to do pretty good. Someone on the Futaba support forum quoted the synthesized R319DPS RX has a drain of 40mAH vs. 10mAH for a crystal controlled R127DF or 13mAH for the R138DP RX. The overall drain of the entire flight pack is likely not that great a difference since the servos would obviously be the biggest contributing factor. With modern PCM synthesized gear and many more digital servos in today's models, the stock 600/700mAH NiCD packs are ridiculously undersized.