As the Hub Motor Turns and the LiPo Fire Burns. I hit a hole in the road.
Only reason I laugh is it was not with Easy Street. It was the little 20" bike.
I will NOT be sure if I did the right thing or not ordering 24 more LG cells for close to $100 but kind of think so I guess. A genuine LG cell had protection circuit built in for prevention of over-discharge I think.
The 24V - 6S LG pack has little power. Maybe 10 mph without pedal and no hills without pedal assist. However the SONA 36V packs 40 cells in parallel goes about 25 mph and can take small hills easily. I was tempted to take Crane st. hill on the way home tonight but decided to burn a calorie or two and huff it.
I do believe I can tackle the hill but would prefer the bike I built with the dual motors which has been proven to take these type of hills.
I will require a upgrade from 36 to 12S Lithium for the front 36V 800 Watt brush unite motor. The rear 500W 24V Unire will get 36V 1 HP upgrade. I believe 30 mph will be somewhere around the gearing.
I think I have the Chinese controllers available. My thumb was reckless and got speed of 20+ mph on home stretch and hit some hole in the road and battery pack unhooked. It was a good thump. Was not as bad as pothole from hell four years ago but a good whack. I need to upgrade to a good light or two LED on front and red light on rear for legal operation.
That is my plan. I thought the chain was too loose and tore s h i t up and tightened the bolts. I thought the design was a little weak as I have several designs for chain drives but need more testing. I need to look at three designs I did and pick one for the 1,800W brushless motor.
I am only talking about rear chain drive not front. I did several of those also but with limited success.
The first custom design I created here on ES and this post was the first Currie 48V motor upgrade on the very early pages. 1,000W 48V Unite motor.
The second which was successful but not as reliable as the first is the new Currie motor recently. I used wood for a 750W gear reduction motor and the chain has come loose on several occasions. Not nearly as reliable or functional as the original Currie upgrade as I remember changing a flat and riding about 3 miles with no axel nuts with the Currie. A professional bike shop hooked up the thin #25 chain to the bolt on freewheel sprocket and the motor.
This is my latest design bolting the motor as tight to the rack underneath as possible. I was very unconvinced it would work as DA was. I just wanted to try but would not have bet a nickle on it working but it passed the pothole test.
The pothole test I created back when I hit a pothole so hard five 25 oz beers sailed up out of my front basket and two were spinning around on the ground with foam spewing out like a rabid dragon. It was most embarrassing when the three startled ladies ask me if I was ok.
The geometry which makes a 20" BMX bike work is the lower center of gravity. A larger bike would have bent the rim and possibly flipped the bike. A 20" bike can take a nice hit or 3 to 4" pothole well. five or 6" may not so. Probably end up closer to road pizza than not.
So far all my road mishaps with e bikes have been due to road conditions. Hitting a hole in pavement. Poor driving conditions and improper lighting. I will be working on this 20" bike to install lights and will do a video.
When I get the new batteries and have 12S we will see if it will go faster than the SONA packs. I hope so. I know that the 6S - 24 cell 6S LG pack is now broken in and seems to be very high capacity but unusual low in power for any 6S pack or 24V I ever used.
When I get the other 24 cells and have a 12S LG pack and 48 cells and 12S then I can test against the 10S - 40 cell SONA pack. Either way my plans are on a big 128 cell 16S pack or two 64 cell 8S packs , 8 rows of 8 with BMS. then in series. Used laptop cells all > 2,000 mAh tested.
When that finally happens I will order the 1,800W brushless motor. However I have learned what will work best from experience The rag tag sprocket is NOT the answer for > 3 horsepower. it is very limited and already failed in < 2 HP builds. The wheel warps. I need a sprocket that bolts directly to a disk brake mount. Thanks
I build e bikes. There not always pretty or practical but sometimes they work, at least for awhile. Immortality is not a dream but the future of our evolution. We were given the tools to forge our own destiny. We were created in gods image and shall evolve to live forever.