Ok, so here we go. Unfortunate reality is this. I got my motorcycle license and have tried the bike out briefly, but a problem presented itself. With the bike theoretically geared for about 80kph it speeds fairly slow, let's say 10 sec to 50kph and then really slow acceleration after that. I have had a lot of trouble with my ammeters blowing up as soon as they are connected so I have yet to get an accurate reading on the current going to my motor or from my batteries. I just got a different meter in the mail yesterday night and have not tried installing it yet but from putting a volt meter on my shunt i get about 45ma voltage max during acceleration. This is on a 500A 75mv shunt. So figure thats around 300 Amps assuming 500A=75mv on the shunt. (Not sure if thats what the rating means). But I only get up to around 35 to 45 volts max coming out of my controller and it starts out from around 10V and slowly climbs at a steady rate. Considering my bike is 72V I dont think I should be getting 27 volts of drop by pulling 300A on a 115ah pack. I could be wrong. I want to bypass te controller and hook the bateries direct for a test to rule out that my controller is not causing the problem. By the way my controller is a Kelly rated for 72V 400Max ad I am confident t is programmed properly.
As to adrian_sm's question:
1. Would not build a Trike! (Wish i'd taken my motorcycle riding course first, my opinion on motorcycle safety is totally different post course)
2. Would build it one of two ways
2A. Build bike with smaller possibly Lithium batteries onboard for short range fun (removable for charging) and then build a removable side car with leaning parallelogram suspension and the same big heavy lead acids for longer range commute.
2B. Build bike with smaller possibly Lithium batteries onboard for short range fun (removable for charging) and thenbuild a tow behind trailer with the same big heavy lead acids for longer range commute.
By going with the trike i sacrificed bout 100lbs to an extra wheel assembly, cv joints, and differential. I also created a bike that is not much fun to ride as it does not lean and requires a heavy push on the handle bars to corner at even 50kph.
I have Spent due to my mistakes a little shy of what i could have spent on a zero s motorcycle an there is a dealer in Vancouver for those bikes so i could have even test driven it before deciding. I now have a bike that weighs twice as much and goes "half the range (Theoretically)"
Needless to say I am disappointed with the result. I have not completely given up on saving it yet as I believe there is more that can be done.
Now, Questions to my readers.
1. Anyone using me 0709 motor or similar please provide Vehicle weight, range on charge, battery voltage and ahours for comparison
2. Please analyze data and give feedback on this guys build compared to mine. http://www.diyelectriccar.com/forums/sh ... 44725.html
Compared with my bike his rolling weight is 892lbs an took him up a %10 gradient at over 65kph.
Mine is rolling weight 750lbs and barely maintains 60kph on the flat.
I am considering getting another frame and starting over mounting 4 batts in engine compartment, 2 as saddle bags and motor on rear swing arm, I am confident I could shave off 100lbs or more this way but I'm not sure what difference it would really make on the flats. Hill helper of course, that's a given.
Appreciate any insights.