P R O J E C T "Y" KILLABICYCLE World record 17 june 2009

[Doctorbass]

=15 may 2009=
-Begining of the project "Y"
(Y is designed on the memory of the flux capacitor " Y ")


-Goal: building a bicycle capable of reaching 60-65mph and /or under 20sec on the quater mile

-Shall be finished for 16 june 2009.

Project description:

Building a bicycle with the lowest weight as possible, the narrower as possible and the most stable as possible able to carry safely 120 A123 cells in 30s 4p seperated in two packs of 15s with a frame able to fit with a X5 motor and to be able to add some fairing on it with lowest cost.
that bicycle must have pedal and thet must stay usable.
It MUST be finished before 17 june 2009 because this date is the event of the drag racing test with the TV show team that will make an episone about my two bikes and where i'll attempt one or two World record.. Torque and Speed.

Part list:

- small low profile bicycle: found a dual suspension used X game motobike cost 80$can : http://www.walmart.com/catalog/product.do?product_id=5584942
-120 A123 cells (that i tested individually in Capacity, Ri and SOC), cost 120$ + 130 hour labor
- 18 mosfet controller ( with original IRFB4110 mosfets) tuned to 150A limit
- X5 5303 on a 20" wheel with ( Delta/Wye)
- lexan and coroplast fairing.
- cycle analyst
- low weight driver: Me

Pics or vid soon.

[Stevil_Knevil]

"Y" E-S!!

Ridefastakechances -S

[deecanio]

Hi Doc,

i kinda think this one looks better for speed?
18" Boys' Hyper Speed BMX Bike
looks like it would be easier to fab a "full fairing"? but either way best of luck !!!!

Cheers,

D

[gogo]

The swingarm design looks questionable. Does your used bike have the triple clamp forks?

[johnrobholmes]

I certainly hope you will reinforce the headtube, fork, and rebuild some worthy wheels. At those speeds one good bump would destroy a typical walmart wheel.



awesome awesome project. Can't wait to see it come together!

[Doctorbass]

I certainly hope you will reinforce the headtube, fork, and rebuild some worthy wheels. At those speeds one good bump would destroy a typical walmart wheel.



awesome awesome project. Can't wait to see it come together!

Over 30mph this ebike will ONLY be used on Drag racing lane.. so the ground is near perfectly flat

The actual lenght between two wheel axel is 37" and it is too short for great stability so this sfternoon i'll meet a guy that make custon mike and ask him to add 6" lenght on the front of the bike. The head tube will be 6" more in front of the bike and that will let me more place to put battery just sat the rear of the front wheel.

I'll also choose a new head tube to fit my old RST Mongoose fork that is stronger and safer.

After examinating the killacycle, i catched alot of important details that i want to reproduce on that ebike. The lenght and height of the ebike ratio to the wheel size will be nearly the same.

I also got many lexan fairing coming from a local thermo molding shop that was made for old solar car project for the Laval University and that are no longer used... I got them for 20$ total.

Now the issue that worrie me is the problems that steveo had with the Delta mode with his X5.. I just hope this is not a fact or caracteristic of any X5 that dont allow delta... and that it is only a wiring error.

Does anyone have great suggestion for great quality 20" flat tires that could take 65mph and that are aerodynamic?

Doc

[TylerDurden]

Those rigs are tiny. If you can find a cx450 frame (bikeraider), it will be much better IMO.

[Doctorbass]

The swingarm design looks questionable. Does your used bike have the triple clamp forks?

Have you an exemple of a tripple clamp fork?

On a plane ground like 1/4 mile lane i'll nearly dont really need suspensions... that only add some weight to the ebike i guess no?

[TylerDurden]

Joepostal & Vanilla have them too.

[steveo]

Sorry i had to

http://www.youtube.com/watch?v=DIoagnswqQI

[gogo]

It starts to seem more like a moped when you get away from multi-gears through the pedals. The pedal drive is there more to meet the definition of a bicycle than for actually using.

How about this moped chassis that has the pedal drive seperate from the motor? Just remove the engine and stuff that nice stiff double cradle frame full of batteries.

Benelli.jpg (62.34 KiB) Viewed 2972 times

At some point there would need to be a weight limit along with a pedal driven chain drive requirement. You can put pedals on any motorcycle.

[HAL9000v2.0]

... for under 20 you should lay down...

... or go Safe's style...

...just thinking...

[HAL9000v2.0]

The swingarm design looks questionable. Does your used bike have the triple clamp forks?

Have you an exemple of a tripple clamp fork?

On a plane ground like 1/4 mile lane i'll nearly dont really need suspensions... that only add some weight to the ebike i guess no?

Even for flat ground over 100kmh you need suspension, not big, 2-3 cm is enough. It is not for pleasure just to avoid small vibration that can resonate somewhere where you do not need it...

[vanilla ice]

I've seen an electric version of the xgames motobike. I'm not sure why its so rarely seen, maybe it got pulled for liability reasons.. I could see that. Illegal for the <16 target demographic on the street. I almost bought one since I'm (physically) over 16, IIRC they came with a small rear hub motor.

[gogo]

When I was drag racing a Yamaha RD350 most racers using wheelie bars had no rear suspension. I think this was because suspensions tended to get pegged when power was applied. It also simplified wheelie bar implementation, they just bolted into the shock mounts.

I kept my suspension and used a lightweight wheelie bar comprised of two stiff (compression) elements and four adjustable steel cable (tension) elements. My launches were butter smooth even though I was just dumping the clutch and letting all the slip happen at the tire/pavement interface.