Y-pedal's two stage RC drive..........

[Ypedal]

Put the 16t eno back on and cha-ching, clean running chain !

Now.. next up is more testing and i've even gone to HK and put a pile of lipo in the shopping cart, then came to my senses and backed out, too close to winter, must wait for next season before investing in more chargers, Gary parts etc..

So.. i came up with a temp solution...

This is my 4 year old LiMn packs, 36v 20ah each, they are 2C cells but with 40ah worth 2C is 80 amps.. 30lbs in a backpack is a bit much but will be good enough for now.

[Ypedal]

This is last thursday at 7:50am !!! - 5 celcius !

[AussieJester]

VIDEOOOOOOOOOOOO YPedal man...

KiM

[Ypedal]

heh heh.. yeah video. It's all a matter of timing but video's of me going up the street, findind a problem and turning back in shame are not very entertaining, i'm getting there tho..

[AussieJester]

Be all worth it when its sorted and trouble free, chain alignment is a PITA i know.. We expect too see alot of Sky shots in your next video too YPedal :: wink wink ::

KiM

[recumpence]

I am looking forward to a video too.

Looks like it is coming along.

Matt

[dontsendbubbamail]

So is 5 C good or bad for you folks up above Yankee land this time of year? Bubba was ridding in shorts today in the great state of North Carolina.

Bubba

[Ypedal]

That's negative 5 celcius ( 23f ) .. and yes.. i consider it cold at 50km/h and the wind chill factor that comes with it !

[dontsendbubbamail]

That is cold from this Southern boys perspective. I missed the neg sign. Winters have been mild lately down this way, but there have been a few times in the past when the water in my water bottle has started freezing during a ride. That was back when I could keep up with the racer boys and rode 6 days a week. It was before the kid and all those family obligations got in the way of ridding. Now the kid is about to graduate from college and I hope to get back to more riding.

Bubba

[oatnet]

This is my 4 year old LiMn packs, 36v 20ah each, they are 2C cells but with 40ah worth 2C is 80 amps..

Are those the Falcon specials from summer of '07?

Those 5 degree C temps bring back bad memories of life before we moved here - it was typical 71 F here today with typical clear blue skies

-JD

[GGoodrum]

Those 5 degree C temps bring back bad memories of life before we moved here - it was typical 71 F here today with typical clear blue skies

-JD

Yeah, my kids whine like three-year olds when it dips down into the 60s, and they're in their 20s.

[Ypedal]

So tonight i loaded up the 36v 40ah pack in a backpack.. well.. that's just too much weight to have on one's shoulders but it did prove something interesting, at 36v and very modest throttle usage ( i know... NOT what i had in mind for this bike !!! ) it is alot more efficient of a system at 36v !

I ran up and down the street a pile of times at like 20% throttle adjusting the gear range and staring at the C.A. i can cruise on 20 amps up slight grade and 12 amps on level ground if i hold the throttle every so still.. more mileage to pile on and re-evaluate..

Chains are running nice and smooth btw !!! I love a quiet chain, i'm weird like that but any system vibration or ricketyrack drives me freakin batty...

Pure luck that the seat post on my Norco is the same as the TidalForce frame !!!!

[swbluto]

I ran up and down the street a pile of times at like 20% throttle adjusting the gear range and staring at the C.A. i can cruise on 20 amps up slight grade and 12 amps on level ground if i hold the throttle every so still.. more mileage to pile on and re-evaluate..

Voltage and amperage without mentioning speed?

[Ypedal]

No spedometer hooked up yet !! heheh.. ( but even at 36v, plenty fast for now with that much weight on the seatpost ! )

[Ypedal]

This is my 4 year old LiMn packs, 36v 20ah each, they are 2C cells but with 40ah worth 2C is 80 amps..

Are those the Falcon specials from summer of '07?



-JD

Yep, that be them.. Pack 1 has a dented cell on no.9 ( got it this way from fev ) that has caused it to show a 0.6v drop but somehow still survives, Pack 2 is relatively in good condition, they show their age that's for sure, I suspect the RC bike will kill them off..

[lifepo4ever]

I hope we will see a video one day

[AussieJester]

I hope we will see a video one day

There already has been one in case you missed it, scroll back a few pages for it...we
of course do EXPECT to see another in the near future when YPedal man has finished 'tweaking'


Good too hear you have the chain issues sorted to mate Do i sense Lipos in Ypedals future hehe

KiM

[oatnet]

This is my 4 year old LiMn packs, 36v 20ah each, they are 2C cells but with 40ah worth 2C is 80 amps..

Are those the Falcon specials from summer of '07?



-JD

Yep, that be them.. Pack 1 has a dented cell on no.9 ( got it this way from fev ) that has caused it to show a 0.6v drop but somehow still survives, Pack 2 is relatively in good condition, they show their age that's for sure, I suspect the RC bike will kill them off..

My 15ah one has @100 cycles on it, my 10ah has a dead BMS I never replaced, I haven't used them forever so I have no idea how they stand. Not much I can do with 36v30a these days but I remember when that was the first 'safe' lithium chemistry we could buy... I don't think they are 4 years old though, they just seem that way.

The bike is really shaping up into something wild - I too am looking forward to your next video installment. Any idea of wh/m you are getting at 36v?

-JD

[Ypedal]

The black boxes are prismatic 20ah cells Li Manganese, looked back on my projects page and looks like it was 2007, but the pack with the dented cell is older.. either way they will do for now until i switch to LiPo in 2010 !!!

Re-post of the video on page 21 or so.. not a new one but for those who missed it back then. ( gets more interesting at the 5 minute mark )

[recumpence]

That is great news!

So, if you got the reduction down even further, you would get much better efficiency. Or you could run a larger motor with lower KV. You had just been running that motor way beyond its efficiency range before.

Anyway, it is looking very nice, ineed!

Matt

[Ypedal]

That is great news!

So, if you got the reduction down even further, you would get much better efficiency. Or you could run a larger motor with lower KV. You had just been running that motor way beyond its efficiency range before.

Anyway, it is looking very nice, ineed!

Matt

Thx !

Yes, the gearing is still way too high, i went for a 36v ride tonight ( led light attached to my helmet, pitch dark out there at 6pm !! ) used up 5ah from my 40ah pack and even at 36v i can't use the whole range available by the Nuvinci.. battery attached to the bike and not on my back makes for a much more comfortable ride !!!!

I have the 200amp shunt installed, CA calibrated for it ( Thanks Oatnet !! ) .

Need to spring load the tensioner on 2nd stage #25 chain.. that's this weekend's project.

At 48v on a stiff voltage lipo pack i will need to get the gearing way way way down, this thing is going to be a rocket once i get it all sorted proper......

Next step, 60t to replace the 45t on the 2nd stage.

[oatnet]

I have the 200amp shunt installed, CA calibrated for it ( Thanks Oatnet !! ) .

Glad that helped!

-JD

[Ypedal]

Today went good !

I sold my e-BMX last night so i'm now using the RC bike as my daily driver. the 36v 40ah pack is just the ticket as it gets me to work and back home on 12ah worth, that's good for these old packs. running on 34~36 v under load, not as zippy as the PSI at 44v but gets the job done for now.

The drive is settling in, chain has worn it's way clear of the frame !! nice slice of aluminum now gone near the bottom bracket but i'm not worried about it, plenty of meat left.

I find that running at aprox 75% throttle and adjusting the Nuvinci to keep myself in the 30 to 50 amp range works best, full throttle just burns up more amps needlessly.

One hell of an attention getter tho, like wow.. everywhere i go i'm stopped and interrogated about the bike, i've repeated myself so many times i now have a dialogue memorized lol..

On my way home, went thru the local nature park to test the drive on a paved ramp, as i get to the bottom of the hill ( aprox 50ft of very steep stuff ) i have to try and quantify this but lets just say most kids on bicyles stand on the pedals and make it up with a running start but 50% of those i've watched go up the hill get half way up and get off the bike to walk the rest of the way ( the type that have not grasped the concept of shifting gears before hitting the hill. )

Anyways.. i get to the bottom and on my left i spot a dozen kids on a school outing who by now have quit listening to the teacher and are staring at me with funny grins on their faces.. so of course i really don't want to snap a chain or stall up the hill.. so i roll up slowly to the hill and turn on the power.. zzzzzZZZZZZZzzZZZZZZ up i go in lowest possible gear range and 70 amps all the way to the top! phew !

On the BMX i could have gone up and down that hill on a wheelie and barely get a 2nd look.. on this bike it's complete oposite.

good times..

Needs Lipo.. i'm so itching to jump onboard.. must resist..*puts visa back in wallet

[recumpence]

No, no, no, pull the Visa back out, put in on the table, log onto Hobby City and order some Lipo, LOTS of lipo. Then you can put the Visa card back.

Matt

[Ypedal]

Oh wow.... i just got back from my first RC ride of 2010 !!!

Before heading out however, i took the time to fab a spring loaded chain tensioner for the 2nd stage, totally worth the effort, removed that anoying vibration i was getting before.. smoooooth now !

And it's that time , LiPO baby !!!! I should be getting a pocket full of cash from the sale of a bike i built last week and it's going towards some 6S 5000mah packs and chargers/celllogs/etc....