Lurkin
100 kW
There is a point where engineering and machinery work is art. This is definitely it. 
HPC Revolution XXX
- Thread starter Leeleeducati
- Start date
Leeleeducati said:
thinking some type of geared drive for front sprocket would solve that...that is why I am going with 34/80 schlumph so i can pedal both uphill from stop and also at 50 MPH......is your rear sprocket going to be internally geared like a rholoff? that may help too
Leeleeducati
100 W
Correct, Rohloff and Shlumpf would be exactly the way to go if I planned to commute with this bike. However, all the riding I do is either gravity or single track so I don’t plan on pedaling this one. It will either be pointed down a hill or twisting through trees so the pedals are there just for ebike compliance. This is also why top end is not really necessary, I either need to climb or twist. I took it out for chain tension testing and overall mechanics, not really to “ride” it. Dropped it off some curbs, bumps, stairs etc. and all functions as it is supposed to. The frame geometry fits/feels very good and not sure if it's the swing arms extended out a bit or the bikes weight, or the double barrel (it reacts fast, adjustable of course), but this ride is hard to wheelie but the motor should help with that. I just need to power it now.
speedmd
10 MW
LeeLee, great looking bike. Look forward to hearing /seeing it run!
Leeleeducati
100 W
I was working on sourcing a fairly sophisticated 200amp controller from ASI (same guys Justin uses for the Phaserunner). They’re local here in Ontario but it didn’t look like they were too interested in dealing with endusers direct. It felt like they made up a price and even said there would be zero warranty, that part didn’t sit well with me… So I have a sinewave Kelly in my ever growing parts bin that can handle the amps (250 I think) so I’ve mounted that for now. I just have to fab. a better CA bar mount as I feel the OEM is way too bulky and then I can start the wiring. These are all the updates for now... I'm aiming to get all the wiring done in the next two weeks.
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r3volved
100 kW
ya ASI is local to me (same town, only a couple km from my home)...and they definitely are not too engaging with consumers. I was hoping they'd be able to help me setup the Phaserunner but I ended up shelving it for now since they don't care to reply.
morati
10 kW
Looks incredible and would very much like to get together for an offroad ride sometime when the weather gets nicer.
John
John
ridethelightning
1 MW
- Joined
- Jul 21, 2013
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this thing just looks like its ready to fly!
looks like it will be comfortable with just about any terrain
looks like it will be comfortable with just about any terrain
Leeleeducati
100 W
Contact Chris at HPC (Hi Power Cycles) they are fantastic to deal with. There's many good reasons to go with this frame vs. others and flexibility is one of them. I will post other pics in the next few weeks, but in fiddling with rear gearing I may try an internally geared hub soon to see that performance and setup. The nice thing now is that I can simply machine different geometry rear dropouts to accept a 135 (currently 157mm). This frame makes it really easy to try/test different set-ups. Even in wheel size I'm running 27.5's nicely. Great work HPC.
Thanks Leeleeducati! I've considered this project and have some questions:
- Can you use engine without spinning pedals? Maybe i've mistaked, but it seems to be solid connection between pedals ang motor (without freewheel).
- What do you think about this type of suspension and brake jack? Will your suspension work when rear brake is pressed?
- Can you use engine without spinning pedals? Maybe i've mistaked, but it seems to be solid connection between pedals ang motor (without freewheel).
- What do you think about this type of suspension and brake jack? Will your suspension work when rear brake is pressed?
Leeleeducati
100 W
Have a look at the pictures at the top of pg. 8. There's a freewheel at the motor shaft and one at the crank. The pedals and motor can spin independent of each other and are not "connected" in terms of one driving the other. The front and rear brake calipers move up and down with the suspension and are functional throughout the entire movement.
Will your rear suspension work when rear brake pressed? For exampe in this video https://www.youtube.com/watch?v=p7-xWSg_wBM suspension makes caliper move along the disc, so when brake is on suspension work hardly. It can be sufficient on downhill. Or this is not problem?
Wheazel
10 kW
220volf said:
I dont see the point here. Yes the suspension might compress slightly when braking the rear wheel,
but you also have a lifting force on the rear if you brake with the front brake at the same time.
I dont think small changes in caliper position will matter much when the wheel is spinning.
I take it that you won't deliberately brake the wheel to a complete stop, as there are no advantages with that.
And even then, whats the issue? Did i miss something critical about rear brake designs?
In my head its just a relationship between "torquearms with different forces".
speedmd
10 MW
All single pivot designs suffer from brake torque to some degree. Even double counter rotating pivots do. Double pivots rotating the same direction handle this torque pretty well. It is all not bad as the suspension compresses a bit under braking allowing a somewhat softer ride and less traction loss over washboard surfaces under hard rear braking. Frame builders have played with floating brake assemblies for decades and while good, they fail to catch on IMO due to the complexities and added failure points.
I have similar frame now and gathering info to produce my own frame. If I understood correctly, single pivot system, like this, have rather good efficiency and simplicity. Am I right?
And I have another stupid question. Will this bike be single speed? If so what that the suitable spped range for that gears? I this this is for low speed, when you have malfunctions or some like that. What for pedals in this machine? Would not simpler design without pedals? I'm asking this because I have not solved question in my project - to do pedals or not.
Will these freewheels work normal when 12kw will be applied? I think bicycle parts designed for human-like power 300W, but not 40 times powerful. They have small teeth which can cut off. This is my hypothesis, I've never tried powerful mid drive But I had accident when traveling on a highway. Rear freewheel suddenly jammed at high speed (about 40 kph) and became to a fixed gear. I took heavy kicks by pedals. Pedals started spinning high. If the speed was greater I would have serious injury.
And I have another stupid question. Will this bike be single speed? If so what that the suitable spped range for that gears? I this this is for low speed, when you have malfunctions or some like that. What for pedals in this machine? Would not simpler design without pedals? I'm asking this because I have not solved question in my project - to do pedals or not.
Will these freewheels work normal when 12kw will be applied? I think bicycle parts designed for human-like power 300W, but not 40 times powerful. They have small teeth which can cut off. This is my hypothesis, I've never tried powerful mid drive
But I had accident when traveling on a highway. Rear freewheel suddenly jammed at high speed (about 40 kph) and became to a fixed gear. I took heavy kicks by pedals. Pedals started spinning high. If the speed was greater I would have serious injury.Leeleeducati
100 W
We're not designing for F1 or MotoGP. Let's keep it in perspective what we're actually doing and note these marginal performance debates are inconsequential at this level. Build a bike, power it, break something, rebuild it stronger, keep riding and enjoy. Let's keep it simple
speedmd
10 MW
Yes LeeLee
Perspective! I am dying to see / hear this thing run. I was thinking that anything over 100-120 amps@ 72v into the 160 pro would be risky on a crank drive setup. Look forward to your ride impressions of how the controller - motor work together.
Perspective! I am dying to see / hear this thing run. I was thinking that anything over 100-120 amps@ 72v into the 160 pro would be risky on a crank drive setup. Look forward to your ride impressions of how the controller - motor work together.
Leeleeducati
100 W
Hey speedmd,
Those were exactly the numbers I had in mind. 72V 100-ish amps, I don't need to go anything over that. Life has been soo busy lately, I haven't the time I needed to complete this. There's even the incomplete CA mount raw material clamped in the mill ready to be worked on but just no time. If I can get that complete this weekend and the CA mounted I will wire everything up and work on powering it all up. I'm close but still have a few steps to complete.
Those were exactly the numbers I had in mind. 72V 100-ish amps, I don't need to go anything over that. Life has been soo busy lately, I haven't the time I needed to complete this. There's even the incomplete CA mount raw material clamped in the mill ready to be worked on but just no time. If I can get that complete this weekend and the CA mounted I will wire everything up and work on powering it all up. I'm close but still have a few steps to complete.
speedmd
10 MW
Time! I hear you there. We need one of those 2400 hour /day clocks.
Often wondered if the new phase runner controller could run this motor reasonably well. May add some chain life if so.
Often wondered if the new phase runner controller could run this motor reasonably well. May add some chain life if so.
Leeleeducati
100 W
izeman
1 GW
was it made on a cnc lathe? looks great.
Leeleeducati
100 W
No, I just rigged it on a rotary table and mill.
Leeleeducati
100 W
I know it's a small detail, but I didn't want to start wiring till I was happy with the CA mount. I just wasn't settled with V1.0. I want the CA to be tight and close to the bars vs. floating cm's away. V2.0 solved this problem. I even added a step for alignment. I think I mentioned our move before and our house is finally ready so before I take the machines apart for transport I thought I'd machine this one last part. Not to procrastinate but things have been a bit busy lately, the wiring will now start soon. Here's a pic of V2.0 on the rotary table and some finished pic. V2.0 holds the CA nice and tight to the bars, no floating CA.
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