Search found 1347 matches

by brumbrum
Jan 08 2012 2:12pm
Forum: EBike General Discussion
Topic: Surly Pugsley Electric conversion?
Replies: 4
Views: 655

Re: Surly Pugsley Electric conversion?

Ultra cool bike, i always thought they'd make a good conversion, i think the tyres may be designed for sand and dusty surfaces. The pugsley is usually used as a mule to carry luggage i.e camping equipment etc hence large rims and tyres The frame also has the added bonus of horizontal rear dropouts :...
by brumbrum
Dec 05 2011 11:41am
Forum: EBike Technical
Topic: 120% setting on sensorless controller
Replies: 14
Views: 1405

Re: 120% setting on sensorless controller

Hi Mark Ginge is building me a pack but i don't think he would trust me with the responsibility of lipos. He is currentiy rebuilding two 54v li-ion packs into one big 84v pack which i hope to run with my pie and my Lyens 12 fet controller. He's built a few packs for me and this one is intended to be...
by brumbrum
Dec 05 2011 10:13am
Forum: EBike Technical
Topic: 120% setting on sensorless controller
Replies: 14
Views: 1405

Re: 120% setting on sensorless controller

Hi both, serves you both right for trying to be clever by going sensorless. It seems that you pay a bit of price on the speed front. Scorpion, Ginge is meant to be building me a battery pack at present so i'm chasing him from forum to forum with gentle reminders :D I cannot help with the 120% settin...
by brumbrum
Apr 29 2011 1:38am
Forum: EBike Technical
Topic: Can i test the rated voltage of my geared hub motors?
Replies: 3
Views: 432

Re: Can i test the rated voltage of my geared hub motors?

Sorry for my delayed reply. I am currently on a steep learning curve and appriciate the detailed feedback. I've just got the bike up and running with a 54v 20ah pack shared between the two motors. As you say running twice the wattage is iffy - which i am doing now, i will probably tamed things down ...
by brumbrum
Apr 26 2011 1:45am
Forum: EBike Technical
Topic: Can i test the rated voltage of my geared hub motors?
Replies: 3
Views: 432

Can i test the rated voltage of my geared hub motors?

Hi, I have two 250w geared motors from Golden Motor. One is rated 24v, the other 36v. How can i find out which is which? Also, will i be able to run these motors together on my bike. One front, one rear, as if they were the same voltage? I have my controllers set-up ready to take both, but I'm worri...
by brumbrum
Apr 22 2011 4:06am
Forum: E-Vehicles General Discussion
Topic: Grim News on the Oil Front!
Replies: 156
Views: 26071

Re: Grim News on the Oil Front!

It was BP's business parters and owners of the oil rig 'Transocean' who's equipment i.e their cement slurry that was meant to prevent a gas leak in the well which caused the explosion, which caused the leak. :wink:

BP were used as high profile scape goats
by brumbrum
Apr 22 2011 2:45am
Forum: Battery Technology
Topic: What is voltage sag?
Replies: 25
Views: 6056

Re: What is voltage sag?

Thankyou, thankyou and thankyou for clearing that up. You always get more than you bargain for on ES :D

and Yes, it makes sense!
by brumbrum
Apr 22 2011 1:50am
Forum: Battery Technology
Topic: What is voltage sag?
Replies: 25
Views: 6056

What is voltage sag?

What is voltage sag? :(
by brumbrum
Apr 21 2011 10:57am
Forum: EBike General Discussion
Topic: Help finding a solution to Bafang gear stripping
Replies: 328
Views: 52971

Re: Help finding a solution to Bafang gear stripping

I've just finished reading this 22 page thread and thought i'd bring it back to life. :) has there since been anymore failures with or without the metal gear? I'm in a similar situation with a Golden Motor '902 prokit' which is geared and rated at 36v 250watt. I have not received the motor yet so ha...
by brumbrum
Apr 20 2011 2:08pm
Forum: EBike General Discussion
Topic: 250w gear motor. what amp limit not to kill the gears.
Replies: 12
Views: 2256

Re: 250w gear motor. what amp limit not to kill the gears.

Thanks for that. Last question, did you lubricate the metal gear? If so, with what?
by brumbrum
Apr 19 2011 2:56am
Forum: EBike General Discussion
Topic: 250w gear motor. what amp limit not to kill the gears.
Replies: 12
Views: 2256

Re: 250w gear motor. what amp limit not to kill the gears.

cell_man is Paul. http://endless-sphere.com/forums/memberlist.php?mode=viewprofile&u=14820 FWIW, no one can give you an absolute safe wattage for geared motors, and it's all a trade off against relaibility, cost, speed etc Personally I'd say 1200-1800W depending on the motor type, usage, rider ...
by brumbrum
Apr 19 2011 2:30am
Forum: EBike General Discussion
Topic: 250w gear motor. what amp limit not to kill the gears.
Replies: 12
Views: 2256

Re: 250w gear motor. what amp limit not to kill the gears.

See http://endless-sphere.com/forums/viewtopic.php?f=3&t=20736&p=385320&hilit=butter#p385320 Several reports of 36v20A and 48v20A being fine. Thanks ever so much for the link :) The golden motor 'magic controllers' are programable via a USB cable to PC so i can actually turn down the co...
by brumbrum
Apr 19 2011 1:48am
Forum: EBike General Discussion
Topic: 250w gear motor. what amp limit not to kill the gears.
Replies: 12
Views: 2256

Re: 250w gear motor. what amp limit not to kill the gears.

kriskros wrote:try cell-man.. he has some quality replacement gears... :
I cannot find the above mentioned user, is this the correct members name?
by brumbrum
Apr 19 2011 1:31am
Forum: EBike General Discussion
Topic: 250w gear motor. what amp limit not to kill the gears.
Replies: 12
Views: 2256

Re: 250w gear motor. what amp limit not to kill the gears.

Thanks for all the replies, there are obviously lots of opinions. The motors are not Bafangs, they are Golden Motor 902 Prokit motors. i already run a very successful front and rear 'magic pie' bike which is great and runs without any problems so please do not start warnig me about the company's rep...
by brumbrum
Apr 17 2011 1:47pm
Forum: EBike General Discussion
Topic: 250w gear motor. what amp limit not to kill the gears.
Replies: 12
Views: 2256

250w gear motor. what amp limit not to kill the gears.

Hi everyone. I'm a new member and first time question asker so please don't slam me! I'm in the UK and am suffering from hardcore e-bike regulations. I am currently trying to bend the UK rules by being as incognito as i can with my set-up. I have two 250watt geared 'mini' motors. I also have a 54v 2...
by brumbrum
Feb 06 2011 2:18pm
Forum: EBike Build Threads
Topic: Your Creation's Before & After Pics
Replies: 1916
Views: 702915

Re: Your Creation's Before & After Pics

nice to see another Great British build! If like me you've probably got one eye on the road and one other looking over your shoulder :wink:

When at speed i wish i had a full suspension bike and not a hard tail on the rough UK roads.
:)
by brumbrum
Feb 05 2011 7:35am
Forum: EBike Build Threads
Topic: Your Creation's Before & After Pics
Replies: 1916
Views: 702915

Re: Your Creation's Before & After Pics

that is amazing. I'd get arrested if i drove that down a main road in the UK
by brumbrum
Jan 31 2011 12:53pm
Forum: EBike General Discussion
Topic: 8-piston gator brakes -
Replies: 37
Views: 7459

Re: 8-piston gator brakes -

HAL9000v2.0 wrote:
brumbrum wrote:... it seems in this case that much stronger rotors are needed, probably solid steel :shock:
Or smaller diameter.

Understood. they do sound like amazing calipers :)
by brumbrum
Jan 31 2011 2:38am
Forum: EBike General Discussion
Topic: 8-piston gator brakes -
Replies: 37
Views: 7459

Re: 8-piston gator brakes -

i think the idea that the more pistons you have the more powerful the brakes is a bit of an urban myth. With high performance car modification it is often used as a selling gimic, if the caliper is huge and has 8 pistons it must have awesome stopping power. I think it's more to do with the brake in ...
by brumbrum
Jan 30 2011 5:23am
Forum: EBike General Discussion
Topic: Tire Suspension! Who's got it!? w00t!! Big Apples Rock!
Replies: 37
Views: 3895

Re: Tire Suspension! Who's got it!? w00t!! Big Apples Rock!

Yeah Crazy Bobs my favorite too Tyler, love the BMX tread. That bike looks a bit of a beast mate??!! Talk to "BrumBrum", it's his sled. I merely crossposted it, since it has the fatties. WOW! It's nice to get noticed just after my first ever post on here, Thanks! Oddly enough i've just ta...
by brumbrum
Jan 30 2011 4:38am
Forum: EBike Build Threads
Topic: Your Creation's Before & After Pics
Replies: 1916
Views: 702915

Re: Your Creation's Before & After Pics

Pretty cool. How is the performance? Are you using a single throttle for both motor/controllers? Sorry for delayed reply. Yes using one throttle. I just soldered two battery power cables to one battery Andersons connector and then joined the throttle wires together from both motors and connected to...
by brumbrum
Jan 28 2011 2:33pm
Forum: EBike Build Threads
Topic: Your Creation's Before & After Pics
Replies: 1916
Views: 702915

Re: Your Creation's Before & After Pics

before.............

Image




After. Two Magic Pies and one 48v/12ah battery

Image



Andrew. UK :D