mongoose blackcomb (lashout) My easiest project ever

[duffmanaudio]

I've had this idea for a while & it took a whole 3 hrs to make & assemble. Its funny how the simple low budget builds are the most effective. This bike works so well I'm kind of waiting for the bomb to drop lol. My only complaint is the battery rack is top heavy.

Here is what I did. I converted the rear disc brakes to rim brake & mounted the motor where the caliper was then mounted a sprocket on the wheel where the disc was.

Its running a kelly kds48100e with a 36v1000watt currie style motor using #35 chain direct to the wheel with a 48v lipo. I've never clocked the speed but it moves very well I'd say 30-35 mph

 

[skeetab5780]

Nice simple project with a good top speed! hows the hill climbing ability?

 

[spinningmagnets]

Since thats an inrunner, it would benefit from some affordable heat-sink fins, with thermal paste. I agree on it being a very affordable build, Google found the $80 100A controller (programmable 24V-48V) http://kellycontroller.com/kds48100100a24v-48v-mini-brushed-controller-p-284.html

Google found a 72T sprocket for $22, and an 84T for $36 (probably better deals around than that, just saying they're available). What tooth-counts are you using right now? (I would not recommend using any less than 11T on the motor)

 

[duffmanaudio]

Its a 8 tooth drive & 66 tooth driven. I bought 10 of the 8 tooth drive sprockets for like $30 shipped & the driven sprocket was from www.affordablegokarts.com/index.php plus it bolts direct to the disc mount $36. This motor barely gets hot. Its much different than the 750w motors. These 1000w motors are a little deeper & there is a 12mm shaft down to a 10mm output shaft.

 

[duffmanaudio]

Plus the hill climbing is incredible on trails I have to lean forward while peddling to keep it down. Its surprisingly efficient as well.

 

[christerljung]

Is there a freewheel somewere? Or is the engine regenerating?

 

[duffmanaudio]

this is direct drive w/o a freewheel

 

[Haste]

any updates on this? Seems very simple to throw together for 300 dollars total...if it really is torquey and hits 35mph..