Stinky with 80-100 and Nuvinci. NEXT BIKE Teaser pic inside!

[Green Machine]

E-racer, nice work! Why did you decide to "skip" the belt drive? Is it something you might add later?

[E-racer]

E-racer, nice work! Why did you decide to "skip" the belt drive? Is it something you might add later?

Cost reduction to expedite the project. I may add it later but the chain is pretty reliable. Thanks!

[E-racer]

New Video! this is a 4 mile run I like to make on the bike. There is a good amount of sustained 35-40mph.

[Ratking]

Very well done, I like your ideas.
I have been waiting for you to start the project a long time ago, and now, you are suddenly finished.
Do you have any data on top speed, acceleration and consumption at say 20mph?

[E-racer]

Yea, I did a lot of design work before I built it. The point of all that work was to make the build go quickly and smooth. Unfortunately, my motorbike budget is spent so I have no way to collect data until those funds increase a bit. Rough estimation from riding this thing almost 100 miles says that it gets about 10 miles averaging 30 mph with 15ah 12s. Top speed so far has been 45mph on my gps. I think it will be a bit better once I get the faster wind done.

[E-racer]

Just got the newly wound motor in. I did a 6turn delta 3p 18 gauge wind. The thing is downright dangerously fast now. EV Grin tonight for sure! Currently does 53 on gps. I calibrated my crappy cycle computer thing and it seems to read quite accurate now. I know its got 60mph in it. I've got 110miles on it so far.

[dozentrio]

Forgive me if I missed these details in the thread somewhere, but:

How much does it weigh? and, what's the powerloss through the CVT? and, where are the vids?

[thepronghorn]

Forgive me if I missed these details in the thread somewhere, but:

How much does it weigh? and, what's the powerloss through the CVT? and, where are the vids?

You missed the vids......

Quick video make sure to watch the end.
http://www.youtube.com/watch?v=hz_9R3DZ4vQ

New Video! this is a 4 mile run I like to make on the bike. There is a good amount of sustained 35-40mph.
http://www.youtube.com/watch?v=Q41r6KApGZo

[E-racer]

It weights 77lbs. We actually put it on the scales tonight. I believe the CVT is about 70% efficient at the bottom and top of the range and they approach 90+% as you approach 1:1. I am a huge fan of the NV I hope I don't ever break it. I have two vehicles with 80-100's and Kelly 48201 controllers. There is no doubt the CVT drastically increases the performance. One great feature; I changed my motor form 12turn to 6turn essentially doubling the motor speed and I corrected for it in CVT software in about 30 seconds. I will post a new video with the 6 turn motor soon! The bike turned 180miles old today. I've let about 30 people ride it. I'd say its holding up well.

[Idontwanttopedal]

I going try map my one tomorrow not 100% about how to get it 100%

[bandaro]

Hey E-racer, not entirely build related and others may want the answers so I wont use a pm, but I have a few queries regarding that motor of yours, wondering how it compares to the stock one in terms of weight, power and noise? It would weight more having more copper, and lower kv means less power, but does the added copper do much to fudge this? and the fact that the windings are probably better now... As for sound, is the motor itself much different or is it basically all chain noise anyway?

Thanks for that, it's great to see new and innovative builds everywhere

[E-racer]

Hey E-racer, not entirely build related and others may want the answers so I wont use a pm, but I have a few queries regarding that motor of yours, wondering how it compares to the stock one in terms of weight, power and noise? It would weight more having more copper, and lower kv means less power, but does the added copper do much to fudge this? and the fact that the windings are probably better now... As for sound, is the motor itself much different or is it basically all chain noise anyway?

Thanks for that, it's great to see new and innovative builds everywhere

I ditched the 12t wind. I ended up rewinding it 6 turn delta just like it was stock. The 12 turn was lack luster sound and power.

[dozentrio]

That motor can do more. Feed it more voltage! You won't regret.

If you want, I'll build the controller for you.

[GITech]

Cool, how's the 6turn workin' out?

[E-racer]

O the 6 turn is great! I'm loving the thing. Got 220 Miles on it now over 10hrs of seat time. Here is a new video

[Idontwanttopedal]

I have one off these hubs with my 1200 cyclone not mapped it to well but do you think this hub work well with a 3220

[E-racer]

I think a NV w/ a 3220 would be great! I would have gone that route if I could afford a 3220.

[E-racer]

bumped the bike up to 13s lipo now. I turned the current limiter on my kelly down to 80% it runs 62 mph on my gps now. More importantly the bikes power doesn't sag as the pack drains like it used to on 12s. Very happy with 13s now! I am wishing I could do 14s but I think I will blow up the NV controller.

[Burtie]

62mph

That is scary speed on a bicycle.

What is the maximum power draw now?

[E-racer]

The stinky is incredibly stable at those speeds. Really there isn't a whole lot you can change about a swing arm and head tube geometry. DH bikes are meant to be ridden down double black diamond slopes minus the snow. 62 on the street is nothing compared to 40+ down a mountain. I wish I could tell you actual current draw. I don't have a CA yet and I haven't put any effort into figuring out how to log the Kelly's internal shunt. I am about to run the bike in a fixed gear ratio (1:1) on the dyno at my school. We have the ATV sized dynojet to tune our formula SAE cars. This will give me accurate data to refine my NV shift map and actual wheel hp.

[Ratking]

Hello

How is everything going? Its been a wile since we have heard anything. Thanks for the tutorial on inventor, it came to good use today.
Are you satisfied with your bike as it is?
How much current have you been giving he 80-100 without overheating it?

[Idontwanttopedal]

I got a 80100 now and a nv but going run a thud 2speed at 66v could you not run a dc to dc step down or a small battery just for nv

[E-racer]

I have had one motor failure in 1000 miles. I had almost 2kW/hr lipo aboard and I did about 50mph to max of 58mph for about 4 miles without dropping below 40mph ever. Toasted the motor. It was worth it though to find out where it's limit was. The motor I toasted was a stock 130kv wind. With the standard 750 W/hr lipo (in swing arm) I can nearly floor it the entire battery and the motor is hot but below 100C.

I am running the bike on one of my old 80-100 cores right now. Side note the Nuvinci Hub is truly a work of engineering art. It is EXCELLENT!

I have decided this setup needs to be able to sustain 50+ mph with about 3 kW/hr. solution:

going to made into a large can/heat sink. It will have ATF in the bottom and the motor will slosh the oil around. I am hoping not to have to fill the level past 1/3 full time and testing will tell.

This is truly an addicting process once you get something running well. There are so many ways to expand. My roommate just ordered a Rep Rap so expect 3d printed stuff aboard soon!

[fizzit]

I am very interested in the results of your oil cooling experiment. I have been thinking about this for a long time and I am very curious what the power losses will be. I feel like it will be a very good cooling solution but it might decrease your efficiency a little.

[recumpence]

I have heard of oil cooling a motor. I am with Fizzit; I would assume this would reduce efficiency quite a bit due to the drag induced. I know it is done wiht other motors, but not at these RPMs we are running.

I am curious to see how it runs. This is a great experiment.

Matt