New 24' slopestyle freeride build, getting serious!

[bzhwindtalker]

I did 450wh of testing, it all works well BUT the frame is flexing under load and there is still some chain issues.
I recorded a peak power of 2200w, max speed of 65kph (on flat).







I am editing the videos right now!

[Whiplash]

Awesome! Im telling you, its all over for the RC motors once some more people build this type of bike. Its just so cool having huge climbing power AND the top speed of a nice hub combined with the simplicity of one as well. I know I will never do it any other way..

[fizzit]

Awesome! Im telling you, its all over for the RC motors once some more people build this type of bike. Its just so cool having huge climbing power AND the top speed of a nice hub combined with the simplicity of one as well. I know I will never do it any other way..

Hmmm... I think rc motors still have some life left. I propose an all-out hub mid drive vs rc race!! Super moto style, with some off road and some on road. Maybe we should limit the battery current/capacity too, so it will be a contest of efficiency

But I gotta say, both of your guys bikes sound pretty fun...and are probably a lot quieter than mine as well. I bet you could have a ton of torque with a fast-hound hub and high gearing.

[bzhwindtalker]

My bike weights 32kg with 16s 10ah headway, it would probably have weigthed 3-4kg less with a RC drive, but I think it has more potential with the hubbie. I'm all for a race dirt tracker style
Videos are coming out quite well!

[gwhy!]

My bike weights 32kg with 16s 10ah headway, it would probably have weigthed 3-4kg less with a RC drive, but I think it has more potential with the hubbie. I'm all for a race dirt tracker style
Videos are coming out quite well!

It looks very good, but its a shame that the rc didnt work out for you,

Awesome! Im telling you, its all over for the RC motors once some more people build this type of bike. Its just so cool having huge climbing power AND the top speed of a nice hub combined with the simplicity of one as well. I know I will never do it any other way..

as regards "its over for rc motors" na dont think so you have all the benefits of a mid mounted hubby going through the rear gears but at a fraction of the weight and cost , my first rc bike was only 19kg and the one Im working on now will be about the same and hopefully nearly silent , except for the dam freewheel I got, its a clicker ,

[Whiplash]

No offence Gwhy! it'll never be as quiet, but maybe close!

[Phoebus]

That bike looks amazing, windtalker. Bet the torque is awesome.

The entire frame flexes, not just the motor mount?

[Phoebus]

hopefully nearly silent

How will you accomplish this with an RC motor?

[bzhwindtalker]

Somone knows how to embeed a video from Vimeo?
https://vimeo.com/39945206

[Whiplash]

Dam can't watch it on my phone!

[adrian_sm]

Nice work. Looks like a hoot to ride.
Love the burnouts. Love the stair climbing. Love the ability to use the gears. Well done.

[gwhy!]

Somone knows how to embeed a video from Vimeo?
https://vimeo.com/39945206

Love it ,

No offence Gwhy! it'll never be as quiet, but maybe close!

Close would be good enough for me

hopefully nearly silent

How will you accomplish this with an RC motor?

I have a few new things I want to try

[Miles]

RC motors vs hub motors.......

Well..... they both have the same topology.... It's just a trade off between torque/speed (& noise!) and weight.

[bzhwindtalker]

Thanks guys! I will try to get a nicer video next weekend with side panels for the battery and painted hub and supports.

I just see hub motors as huge low kv outruners, because it's what they are I don't have any complex wearing a frock

[bzhwindtalker]

I just started a thread to share some media about hub motor mid drives, Whiplash you could probably contribute with some pictures and videos?
viewtopic.php?f=6&t=38553&p=562377#p562377

[bzhwindtalker]

I modified the axle to have a M8 on one side and a M6 on the other just to retain the motor and supports, painted everything, and made a black coroplast battery box

I also managed to snap a chain The failure was probably related to going WOT on a low gear, and a bad use of the chain tool

[Phoebus]

What is your opinion on the suitability of one of those sub 500w tiny hub motors for a mid drive setup such as yours? I'm thinking that it may be one way to get some stealth out of a mid mount hub motor design.

You're running max 2000 W right now?

[Whiplash]

The smaller hubs should work well, I am trying to get my brother to let me setup a small one on his bike pulling around 750 watts through the little MXUS that Cell man sells. I think it will do just about any hill you need, it will just do it slower than a big motor.... That and your on road speed will not be anywhere near as fast, I am guessing it will pull him along around 25MPH at best, but he is happy with that..

[bzhwindtalker]

yeah that's one thing I would love to try too, on a ligthweigth dirt jumping bike with 44v5ah, just to get a small kick in the butt before a jump

[deecanio]

LOVING YOUR WORK GUYS!!!
looking for a small mid drive next, just watching to see what sort of hub to use, small small small.

D

[gwhy!]

LOVING YOUR WORK GUYS!!!
looking for a small mid drive next, just watching to see what sort of hub to use, small small small.

D

About the smallest you are going to get is a 63mm outrunner

[bzhwindtalker]

True, à 63mm motor is hart to beat for sub 3kw systems!
But you need to build à two stage reduction to the rear wheel or 3 stage to the BB. With the rpm of a High spinning rc motor, multiple gears are needed only if you want à really High top speed with a small motor. Plus relyable controlers are hard to setup, if aviable!

[deecanio]

no reduction.no noise.no bs.
just frock to crank

D

[Whiplash]

[bzhwindtalker]

too! I may still mount the 63-74 on a DJ bike with the sensorless ss190-200
Whip, any snapped chains yet?