Search found 553 matches

by Grinhill
Jan 29 2012 10:51pm
Forum: E-Bike Non-hub Motor Drives
Topic: Tom's BEAST
Replies: 152
Views: 21882

Re: Tom's BEAST *first run*

Great build Tom.

I've gotta ask the silly question, is it one of those chainrings with asymetrical teeth, like a ramp on one side of each tooth? If that was flipped the wrong way, the chain would tend to ride up the ramps.
by Grinhill
Dec 26 2011 12:22am
Forum: E-Vehicles General Discussion
Topic: DIY Aptera knockoff?
Replies: 292
Views: 57426

Re: DIY Aptera knockoff?

Apologies for drifting O/T again, but here's an ICE-powered quad for inspiration. 186kW Ferrari engine. :twisted:
frankenquad.jpg
frankenquad.jpg (95.47 KiB) Viewed 2626 times
Wazuma V8F, yours for $262,000.

The wide front track and narrow rear fits with the tadpole theme somewhat, I guess. :roll:
by Grinhill
Dec 25 2011 9:53pm
Forum: General Discussion
Topic: Merry Christmas and a Happy New Year to EVERYONE at E.S. !!!!!
Replies: 210
Views: 11187

Re: Merry Christmas everyone!

Hi and Merry Christmas to all, and congrats deec. Thought I'd share a pic, I got a chuckle from this gift I received from my mother-in-law, for the e-biker who has everything. It's a working model e-bike, around 1:6 scale. Plays a silly tune and has blinking lights as it motors along. Batteries in t...
by Grinhill
Dec 14 2011 10:29pm
Forum: Battery Technology
Topic: Precharge delay circuit
Replies: 17
Views: 3636

Re: Precharge delay circuit

The guy who did the circuit explains it like this: The reverse connected emitter/base junction of a 2N3904 transistor is used as an 8 volt zener diode which creates a higher turn-on voltage for the Darlington connected transistor pair although I'm not sure why he didn't just use a zener in the first...
by Grinhill
Dec 13 2011 4:10am
Forum: E-Bike Non-hub Motor Drives
Topic: 1000 Watt Mid Drive with True Double Freewheel
Replies: 27
Views: 5934

Re: 1000 Watt Mid Drive with True Double Freewheel

Very interesting, Ron. I like the double-freewheel setup. I recently used a six-turn Astro 3210 running through the gears at around 1000W also, for a distance challenge race. I was running it on 30V with power limited by a CA-LRC. There was no pedal input allowed in this particular race. One thing t...
by Grinhill
Dec 13 2011 4:05am
Forum: E-Bike Non-hub Motor Drives
Topic: 1000 Watt Mid Drive with True Double Freewheel
Replies: 27
Views: 5934

Re: 1000 Watt Mid Drive with True Double Freewheel

Very interesting, Ron. I like the double-freewheel setup. I recently used a six-turn Astro 3210 running through the gears at around 1000W also, for a distance challenge race. I was running it on 30V with power limited by a CA-LRC. There was no pedal input allowed in this particular race. One thing t...
by Grinhill
Dec 07 2011 3:00pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Hyena's e-bike builds (now with HD video)
Replies: 3900
Views: 505570

Re: Hyena's e-bike builds (now with HD video)

here's a baby one I had to shoo out of my garage last week, damn things are everywhere:
IMG_4153s.jpg
IMG_4153s.jpg (80.63 KiB) Viewed 2342 times
His mummy is about 5 feet long. The lady who delivers parcels to my place saw it one day, now she stands outside the fence and throws my parcels at me then runs. :D
by Grinhill
Dec 07 2011 2:44pm
Forum: E-Bike General Discussion
Topic: folding bike conversion?
Replies: 31
Views: 3675

Re: folding bike conversion?

Thanks stingray, real-world experience is invaluable.

Now we know it can be done! :D
by Grinhill
Dec 05 2011 9:33pm
Forum: E-Bike General Discussion
Topic: Built A Frame Today
Replies: 38
Views: 2266

Re: Built A Frame Today

OK, I do have an angle grinder which gets used plenty, especially for cutting complex shapes, but for straight cutting tubes I was surprised to find the hacksaw quicker and neater!
by Grinhill
Dec 05 2011 9:23pm
Forum: E-Bike Technical
Topic: Internal clearence between rotor and e-hub
Replies: 5
Views: 483

Re: Internal clearence between rotor and e-hub

This thread may have some information you are looking for:

http://endless-sphere.com/forums/viewto ... ce#p411751
by Grinhill
Dec 05 2011 6:07pm
Forum: E-Bike General Discussion
Topic: Built A Frame Today
Replies: 38
Views: 2266

Re: Built A Frame Today

Love your work, etard! +1 for frame chopping and welding being one of the funnest things to do on a weekend. :mrgreen: A stick welder and hacksaw are my weapons of choice, and kerbside cleanups the best source for tubing. So the kid's BMX frame is a little small for you, then s-t-r-e-t-c-h it: IMG_3...
by Grinhill
Dec 05 2011 5:49pm
Forum: E-Bike Non-hub Motor Drives
Topic: Cute 128 BB drive on a Surly 1x1
Replies: 15
Views: 2833

Re: Cute 128 BB drive on a Surly 1x1

Great work!

I love the tubing clamps, and that is some very fine welding on them too!
by Grinhill
Dec 05 2011 5:35pm
Forum: E-Bike General Discussion
Topic: Gold Bullet Connectors - Which size for 18S? 4, 5.5, 6, 8mm?
Replies: 34
Views: 4466

Re: Gold Bullet Connectors - Which size for 18S? 4, 5.5, 6,

auraslip wrote:
Keeping them from shorting might be an issue though.
You got that right! Whatever you do, make sure you don't have unshrouded positive and negative battery connectors at the same time, no matter how careful you think you are being. :)
by Grinhill
Dec 05 2011 4:50pm
Forum: E-Bike Non-hub Motor Drives
Topic: Beta CA build for R/C controllers
Replies: 263
Views: 54912

Re: Beta CA build for R/C controllers

Justin,
Sorry if this has already been covered elsewhere in this thread, but is it possible to get this to work on earlier model CAs? (I have another CA which is about two years old, small screen / single button).

Thanks
by Grinhill
Dec 04 2011 1:41am
Forum: E-Bike General Discussion
Topic: Long Distance High Efficiency
Replies: 61
Views: 3441

Re: Long Distance High Efficiency

Welcome to the forum, and good luck with your build. :D I must say I'm very impressed with summary in the preceding couple of posts. It's often difficult to come up with the best answers from a question posed in a thread, particularly when there are many pages of stuff, often drifting off topic. Tha...
by Grinhill
Dec 02 2011 12:16am
Forum: E-Bike Build Threads / Photos & Video
Topic: eBike Crash: Wet wooden bridge...
Replies: 31
Views: 5158

Re: eBike Crash: Wet wooden bridge...

Great quality vid, and great moment captured. How many of us wish the camera was rolling when we had our last crash???

Thanks for sharing. :D
by Grinhill
Nov 27 2011 7:02am
Forum: E-Bike General Discussion
Topic: folding bike conversion?
Replies: 31
Views: 3675

Re: folding bike conversion?

My wife's bike is a Dahon Speed 7, fitted with a Kepler eboost (RC motor friction drive) and 5S 10Ah of Lipo. It's a great bike, really well designed and lightweight. The rear dropouts are a little narrower than usual (around 130mm), just check that's not an issue with your selected kit. Front dropo...
by Grinhill
Nov 25 2011 4:51am
Forum: Battery Technology
Topic: leaderhobby LiPo packs? Has anyone experience with?
Replies: 127
Views: 10745

Re: leaderhobby LiPo packs? Has anyone experience with?

For the record, here's my experience with Leaders Hobby: I ordered four of the Transmetic 4S 10Ah 10C packs a couple of months back for my competition bike, at that time they were only $32 each (which was even better than the $41). However, I then received an email from a lady there saying that the ...
by Grinhill
Nov 24 2011 10:25pm
Forum: E-vents
Topic: Australia: Hunter Valley EV festival and competition Nov 20t
Replies: 56
Views: 5376

Re: Australia: Hunter Valley EV festival and competition Nov

Woops, sorry Abraham. So do you sometimes post as voicecoils as well?

Yes Maurice has an idea about a hillclimb event, he must like making smoke come out of motors. :twisted:
by Grinhill
Nov 24 2011 7:12pm
Forum: E-Bike Technical
Topic: One way bearing keeps siezing
Replies: 14
Views: 1239

Re: One way bearing keeps siezing

If you can fit a larger diameter shaft (or add sleeve) and bearing while keeping the same size sprocket, you can move to one with a higher torque rating. Hardened shafts are always better if possible. :lol: The other thing I have noticed with my one-way rollers is that grime tends to accumulate in t...
by Grinhill
Nov 24 2011 6:58pm
Forum: E-Bike General Discussion
Topic: Minature Controllers
Replies: 19
Views: 1342

Re: Minature Controllers

Six pages on the Gruber assist in this ES thread for those that are interested:

http://www.endless-sphere.com/forums/vi ... lit=gruber
by Grinhill
Nov 24 2011 6:52pm
Forum: General Discussion
Topic: Damn Castle Creations!!
Replies: 11
Views: 1404

Re: Damn Castle Creations!!

Just got my ICE HV160 back from the Australian service agent today. That was about a day over two months to get the mod done. Probably about what I was expecting given the magnitude of the task. It's now sporting a shiny ICE2 HV160 sticker. :D I haven't hear any stories of the sort of failures which...
by Grinhill
Nov 24 2011 4:40am
Forum: E-Bike Non-hub Motor Drives
Topic: Custom Build... 2 Speed H.O.B.O Powered e-Cruiser
Replies: 945
Views: 120485

Re: Custom Build... 2 Speed H.O.B.O Powered e-Cruiser

I'm looking forward to seeing the CroMo version of your cruiser, Kim, get welding soon!!! How much lighter do you think the frame will end up? I suppose you have considered a trailer or trolley arrangement for your wheelchair to keep the main wheels off the ground? What about some pneumatic pram whe...
by Grinhill
Nov 24 2011 4:23am
Forum: E-vents
Topic: Australia: Hunter Valley EV festival and competition Nov 20t
Replies: 56
Views: 5376

Re: Australia: Hunter Valley EV festival and competition Nov

It's funny, I asked The Lawnmower Man whether he had ever rolled it while I was chatting to him on the Saturday display day before the track day. (He had just been doing some circle work on the council's public park area). :twisted: Good of him to oblige us with a demo of rolling it, however he forg...
by Grinhill
Nov 24 2011 4:12am
Forum: E-Bike Build Threads / Photos & Video
Topic: 2009 Giant Talon - MAC motor
Replies: 7
Views: 2725

Re: 2009 Giant Talon - MAC motor

I must be missing something here. I can only see four 3S batteries, making 12S. Do you have a 2S battery as well. :?