50CC Power System
02-18-2006, 07:44 PM
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50CC Power System
I am in the process of building a QQ 50CC size YAK and am looking at various possibilities for batteries.
It seems that some advocate a Li Ion system with switching regulators and some the use of NiMh batteries. I have lots more experience in electronics than I do in large scale airplanes.
My electronics experience tells me that the battery/regulator systems put lots more failure possibilities in the chain. I see where one seller of systems sems to advocate using the Miracle Switch and using two in parallel which really bothers me. It would seem possible that the two regualtors might fight each other and use the power wiring as balancing resistors. That would not be good.
So - What do the experts recommend?
It seems that some advocate a Li Ion system with switching regulators and some the use of NiMh batteries. I have lots more experience in electronics than I do in large scale airplanes.
My electronics experience tells me that the battery/regulator systems put lots more failure possibilities in the chain. I see where one seller of systems sems to advocate using the Miracle Switch and using two in parallel which really bothers me. It would seem possible that the two regualtors might fight each other and use the power wiring as balancing resistors. That would not be good.
So - What do the experts recommend?
02-18-2006, 07:59 PM
#2
RE: 50CC Power System
I'd go with a single 4800 fromeco. If you must have redundancy, go with dual 2400 Fromecos. If you think nimh's are your thing, a single 1950 or so 5 cell would be ideal, or, again, dual 1100-1400's if you want redundancy, but stay away from anything heavier. Of all these, the single 1950 would be the lightest...
Also, the Fromecos are very reliable. while there is the added regulator failure possibility, it also has a failsafe swithct that fails to the on position - something that a standard heavy-duty switch for Nimh's doesn't have.
Also, the Fromecos are very reliable. while there is the added regulator failure possibility, it also has a failsafe swithct that fails to the on position - something that a standard heavy-duty switch for Nimh's doesn't have.
