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by **Matt Gruber** » Mon Apr 30, 2007 7:53 am

NO pedaling!
i keep reading how fast this or that is. but i have no idea how to compare.
0-100' flat is easy to do.
is it faster on higher volts or does the controller kick it back?
of course details are important.

my mx500 based mbike 500w.
0-100' is 7 seconds it weighs 132# plus me 142 on 42v peak ~36a Unite MY1020 7.27:1 on 14" tire

my E300 based psev is 11 sec 250w.
62# 24v slow ramp up to peak ~20a Unite MY1016 5:1 on 10" tire

i'm real interested in the Puma as it is said to be one of the best in its class.

THANKS!

by **Tony** » Sun May 06, 2007 4:28 pm

Did 3 runs all about 7.2 seconds @14mph end speed.
Setup: BMC geared front hub motor, stock (weak) 15amp controller at 48 volts. Rider 200lbs, bike+ motor+ batteries about 75 lbs. 26 inch wheel with large maxxis hookworm tires. Pretty good for a large wheel and 15 amp controller I think. This motor would be real quick with a 20 inch wheel and 40 amp controller.

by **Matt Gruber** » Sun May 06, 2007 6:36 pm

that does sound good. might really be higher amps. my 30a does 36a.
thanks for the report!

by **Tony** » Sun May 06, 2007 8:33 pm

I wish it would give me some more amps, my watts up meter states max amps at 16.2, thats with full throttle up hill. I don't think I'll be able to hold out on upgrading my controller even though it's still good fun with the lower amps.

by **scottclarke** » Sat May 12, 2007 1:16 pm

Good idea!

I've not actually gone out and measured it on the flat yet but I did post a video of a 10% hill start where I completed a 150ft or so run in 10 seconds with a 27/28kmh terminal. Pretty sure it'll do 100ft on the flat in <6 secs but I will do the test to confirm - also do a video of the runs:)

OK done it - no vid since no-one around to do it!

Battery is maybe 1/2 depleted - expect it to me much faster fresh of the charger. Time was less than 6 secs - 5.6 to 6 - did 4 runs.

Scott

by **Lowell** » Wed May 16, 2007 3:23 am

RM503 = 100ft in 4.5 seconds at 28mph. Still not good enough though, but hopefully the Emoli cells will get me on par with the insane-a-cycle's
0-30mph under 4s, and 0-40mph under 6s.

by **geoff57** » Fri May 25, 2007 7:21 pm

Hi all
I'll do those tests tomorrow and post the results.
I'm following the thread on hub motors and keep having the term efficency banded around without saying what that could be, I'm going to start a thread to try and answer this.

thats all for now
Geoff

by **EbikeMaui** » Tue May 29, 2007 9:20 pm

A speed measurement in a 100 feet would be slower acelleration than the same speed in less distance.
http://video.google.com/videoplay?docid ... 5398356399

by **Toorbough ULL-Zeveigh** » Tue May 29, 2007 9:35 pm

EbikeMaui wrote:A speed measurement in a 100 feet would be slower acelleration than the same speed in less distance.
http://video.google.com/videoplay?docid ... 5398356399

Not if the acceleration levelled off at the shorter distance.
It may take the early lead but still lose the race at the 100 ft. mark.
By your logic an ant can out accelerate any of us if the race was short enuf, say less than a millimeter.

by **EbikeMaui** » Wed May 30, 2007 4:38 am

Toorbough ULL-Zeveigh wrote:
EbikeMaui wrote:A speed measurement in a 100 feet would be slower acelleration than the same speed in less distance.
http://video.google.com/videoplay?docid ... 5398356399[/quote
Not if the acceleration levelled off at the shorter distance.
It may take the early lead but still lose the race at the 100 ft. mark.
By your logic an ant can out accelerate any of us if the race was short enuf, say less than a millimeter.

only if

by **Toorbough ULL-Zeveigh** » Wed May 30, 2007 9:41 am

EbikeMaui wrote:
Toorbough ULL-Zeveigh wrote:
EbikeMaui wrote:A speed measurement in a 100 feet would be slower acelleration than the same speed in less distance.
http://video.google.com/videoplay?docid ... 5398356399[/quote
Not if the acceleration levelled off at the shorter distance.
It may take the early lead but still lose the race at the 100 ft. mark.
By your logic an ant can out accelerate any of us if the race was short enuf, say less than a millimeter.
only if

right.

Which is why in the scientific process you only change one variable at a time & keep all others constant.
In this case the variable being tested for is the motor's acceleration.
If you also change the distance then the comparison becomes meaningless.

I hope this helps (knowing full well it's futile).

by **Mathurin** » Wed May 30, 2007 10:59 am

EbikeMaui wrote:A speed measurement in a 100 feet would be slower acelleration than the same speed in less distance.
http://video.google.com/videoplay?docid ... 5398356399

Downhill!?

by **TylerDurden** » Wed May 30, 2007 6:29 pm

^^^

mongoose 250w moto-x.
0-100' = 7 seconds

Bike 65#
Rider = 160#
4) 3ah 24v emoli drill packs @2.2# ea = 9lbs

24VUnite MY1018
20"dia. tire

time through the trap @ top speed = 5sec.

by **Eric G** » Fri Jun 01, 2007 3:12 pm

600watt C-lyte Brushed (20in.rear wheel) 36v SLA. 25a/contr.
Bike/motor/batts/me/ = 99.1 KG + 2 liters ice cream/1 lb pepperoni/2 tomatoes/1 Lg. bag of BBQ Fritos.

0 to 100 ft. = 8 seconds.
End speed = 17.5 km/h

Eric

by **xyster** » Fri Jun 01, 2007 4:13 pm

Bike/motor/batts/me/ = 99.1 KG + 2 liters ice cream/1 lb pepperoni/2 tomatoes/1 Lg. bag of BBQ Fritos.

Let me guess from that shopping list: the great bulk of that 99 KG weight is "me". :lol:

by **Eric G** » Fri Jun 01, 2007 6:17 pm

xyster wrote:
Bike/motor/batts/me/ = 99.1 KG + 2 liters ice cream/1 lb pepperoni/2 tomatoes/1 Lg. bag of BBQ Fritos.

Let me guess from that shopping list: the great bulk of that 99 KG weight is "me".

Yep...
Did the run behind the grocery store

by **Tony** » Sat Jun 02, 2007 7:22 pm

Finally upgraded to the crystalyte 35a controller. Seems to have a "soft start" compared to the stock 15a controller. But I did shave about a second off my time to 6.1 seconds. With this set up the midrange torque is great! Its just starting to pull hard at the 100 ft mark.

by **Mathurin** » Sat Jun 02, 2007 7:50 pm

I guess you could try holding the brake, full throttle till it ramps up a bit, then let it rip, unless it don't work that way...

by **scottclarke** » Sat Jun 02, 2007 8:34 pm

Mathurin wrote:I guess you could try holding the brake, full throttle till it ramps up a bit, then let it rip, unless it don't work that way...

Haha - thats funny! Commence a run with a burnout - I'll have to get a vid of that - methinks the time will be faster too - lotta energy in the flywheel - sorry - rear hub!

by **fechter** » Sat Jun 02, 2007 9:43 pm

Tony wrote:Finally upgraded to the crystalyte 35a controller. Seems to have a "soft start" compared to the stock 15a controller. But I did shave about a second off my time to 6.1 seconds. With this set up the midrange torque is great! Its just starting to pull hard at the 100 ft mark.

There's a way to fix that.

by **Lowell** » Sun Jun 03, 2007 12:16 am

scottclarke wrote:
Mathurin wrote:I guess you could try holding the brake, full throttle till it ramps up a bit, then let it rip, unless it don't work that way...

Haha - thats funny! Commence a run with a burnout - I'll have to get a vid of that - methinks the time will be faster too - lotta energy in the flywheel - sorry - rear hub!

Worked great for Ferris Bueller! :lol:

by **fechter** » Sun Jun 03, 2007 1:01 pm

Vego SX-600 with modified BMC 600w motor.
Total weight 270 lb.
48v.

100' in about 4.5 seconds, +/- .5 sec.
Speed around 25mph at the end.

It was hard to work a stopwatch and ride at the same time.
I'll try to get an assistant next time to make the measurement a bit more accurate.

by **Lowell** » Sun Jun 03, 2007 1:06 pm

fechter wrote:Vego SX-600 with modified BMC 600w motor.
Total weight 270 lb.
48v.

100' in about 4.5 seconds, +/- .5 sec.
Speed around 25mph at the end.

It was hard to work a stopwatch and ride at the same time.
I'll try to get an assistant next time to make the measurement a bit more accurate.

Now that's more like it! You must surprise the heck out of the unsuspecting when riding the Vego.

by **fechter** » Sun Jun 03, 2007 1:13 pm

I like waiting at stop signs for a car to pull up and stop. When they start to go, I hit it. The look on their face is priceless. :twisted:

by **EbikeMaui** » Tue Jun 05, 2007 6:02 pm

"How To Win Enemies & Alienate Everybody"
By Randy Draper

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