More smaller batteries vs. Less bigger batteries

[Green_Primus]

~Hypothetical~
I want to convert my Mountain Bike to electric, I can get my hands on a D-cell sized Battery cartridge that holds 3 rechargeable AA's in series, If I take (lets say 2) 28" "water Pipes" With threaded ends (and caps) with a diameter wide enough to house the batteries/wires (for any leakage) wired in parallel with each other and strapped to the bike and fed into a motor (and any controls) Could this be done? I mean we're talking about 3x1.2v AA's, 3.6v per cartridge, about 2" tall, means ~14 per tube, 50.4v per tube, in parallel, would keep the voltage the same but increase amps meaning the batteries would work longer. So with 50v and a 48v motor it SHOULD work right, yah with a slightly higher voltage it would tax the motor a bite but it should be fine... right?

An Electric bike COULD run on nothing but AA's?

Their cheap used in everything (almost) and don't require any special setups, this can be done?

[2005_rs]

I've read about a guy trying this in a powered bicycle forum who got poor results. The problem is the cheap nimh batteries can't dump amps fast enough to power the motor. This called the C rating, which isn't published on the specs; at least not the ebay ones. C refers to the rated discharge capacity of the battery. A 1000mAh battery rated at 1C can only discharge about 1000mA continuously. Hobby batteries for airplanes etc are rated at 10, 20, 30 and 40C. (maybe more, I don't know)
Once you start looking at batteries that publish a realistic C rating, the price goes way up