Search found 201 matches

by v_tach
Mar 31 2008 2:30pm
Forum: E-Vehicles General Discussion
Topic: Zero X dirt bike
Replies: 3
Views: 872

Re: Zero X dirt bike

The Drift, that was it.

Image
by v_tach
Mar 30 2008 10:14pm
Forum: E-Vehicles General Discussion
Topic: Zero X dirt bike
Replies: 3
Views: 872

Re: Zero X dirt bike

Wasn't Neal a member here or the old VisforV forum maybe? That frame sure does look familiar.
by v_tach
Mar 17 2008 7:50am
Forum: E-Bike Technical
Topic: Where can i find W-I-D-E Heat Shrink?
Replies: 6
Views: 716

Re: Where can i find W-I-D-E Heat Shrink?

kbarrett wrote:3M corp busbar heatshrink.

Up to 24". Not sure who retails the stuff.
Carry for up to 16"...

https://www.wholesaleelectric.com/eshop ... ING+TUBING+(HEAT+SHRINK&st1=BUS+BAR+TUBING
by v_tach
Mar 11 2008 6:04pm
Forum: Battery Technology
Topic: What the heck is with Dewalt battery prices on ebay
Replies: 36
Views: 3165

Re: What the heck is with Dewalt battery prices on ebay

Toorbough ULL-Zeveigh wrote:A123 has set up a http://www.a123racing.com to cater to the RC crowd.
Why are they even messing with deW pax?
$90 for a three cell pack is the reason why I'm guessing.
by v_tach
Mar 08 2008 9:24am
Forum: E-Vehicles General Discussion
Topic: Robocop electric scooter... :P
Replies: 2
Views: 684

Re: Robocop electric scooter... :P

...and a mounted stun gun to crackle every now and again when barking out warnings.
by v_tach
Feb 25 2008 1:43pm
Forum: E-Bike Technical
Topic: need help using a Generator to increase Milage
Replies: 23
Views: 2450

Re: need help using a Generator to increase Milage

If you can feed the back EMF from the generator back to the drive motor... ahh, never mind. :lol:
by v_tach
Feb 13 2008 2:11pm
Forum: E-Vehicles General Discussion
Topic: EVs: Welding versus Brazing
Replies: 76
Views: 11720

Re: EVs: Welding versus Brazing

With sand, steel shot, anything semi-fluid, you'd have to come up with a way to cork the ends of the tube really tightly to maintain compression. I've just used a few strips of duct tape when I've used sand to bend thin walled tubing. Unless the end of the tubing is very close to the bend, it doesn...
by v_tach
Feb 08 2008 2:43pm
Forum: E-Vehicles General Discussion
Topic: EVs: Welding versus Brazing
Replies: 76
Views: 11720

Re: EVs: Welding versus Brazing

Pipe benders are not tubing benders, that is correct. However some pipe benders can be used to bend tubing with the appropriate considerations. I mentioned filling the tubing with sand rather than freezing water because it difficult to get most lengths into a freezer and personally I'm not fond of a...
by v_tach
Feb 07 2008 12:53pm
Forum: E-Vehicles General Discussion
Topic: EVs: Welding versus Brazing
Replies: 76
Views: 11720

Re: EVs: Welding versus Brazing

HF has hydraulic benders cheep: http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=32888 http://www.harborfreight.com/cpi/photos/32800-32899/32888.gif Bends 6 different diameter pipes from 1/2" to 2". Bending bars can be adjusted to distances of 8-1/2", 11-1/4", 12", 16-3/4", 19-1/2" ...
by v_tach
Dec 03 2007 4:40pm
Forum: E-Bike Technical
Topic: The (Cheap) Programmable Controller
Replies: 101
Views: 11297

I'm all for cheap and next to nothing if the functionality and reliability are still there.
by v_tach
Dec 03 2007 4:06pm
Forum: E-Bike Technical
Topic: The (Cheap) Programmable Controller
Replies: 101
Views: 11297

Though not cheap, the controller in the Goped ESR is programmable. Two performance modes (Turbo and Econo) are available with a handlebar mounted switch. Both modes can have the top speed and acceleration parameters set individually. Unfortunately the programming interface must be purchased seperate...
by v_tach
Nov 23 2007 8:31am
Forum: Battery Technology
Topic: Two Interesting New Lithium Breeds At BatterySp.
Replies: 19
Views: 2793

I don't think you're doing yourself a service replying to every thread and promoting something you don't have. Don't have? The website may not be complete and fully functional but haven't they been selling the battery packs for months? I think their ebay store is one available source. There have be...
by v_tach
Nov 21 2007 2:11pm
Forum: Battery Technology
Topic: Adding an on/off switch to the Cycle Analyst?
Replies: 12
Views: 1427

Looks more like a meth addict. Hooker, meth addict... humm, I guess could be the same in many places.
by v_tach
Nov 21 2007 10:54am
Forum: Battery Technology
Topic: Adding an on/off switch to the Cycle Analyst?
Replies: 12
Views: 1427

Marty I guess I didnt word my posts very well, my apologies. I finished up last evening and everything works fine. My only concern about the installation was if putting a switch inline with V+ of the CA would cause any problems I didnt consider. This topic area seemed apropriate since the CA can be ...
by v_tach
Nov 20 2007 9:10pm
Forum: Battery Technology
Topic: Adding an on/off switch to the Cycle Analyst?
Replies: 12
Views: 1427

Cut it? Why would I want to do that? It just carries a low voltage signal to power the motor controller on and off.

BTW that GoPed marketing pic doesn't exactly scream safe and responsible riding does it? lol
by v_tach
Nov 20 2007 8:06pm
Forum: Battery Technology
Topic: Adding an on/off switch to the Cycle Analyst?
Replies: 12
Views: 1427

No, the power switch is wired directly to the controller. I'll probably be installing the power switch to the CA this evening, no big deal. I installed Deans connectors to the CA last night but still need to install them in-line with the battery pack leads. I'm curious to get some baseline figures f...
by v_tach
Nov 20 2007 4:31pm
Forum: Battery Technology
Topic: Adding an on/off switch to the Cycle Analyst?
Replies: 12
Views: 1427

Re: Adding an on/off switch to the Cycle Analyst?

I have the stand-alone CA and the application doesn't have a practical way to install a battery switch between the battery pack and the CA. Are there any special considerations to adding a small switch to the CA's case for the V+ lead so I can power the CA on and off? I assume V+ is the correct lea...
by v_tach
Nov 20 2007 3:47pm
Forum: Battery Technology
Topic: Adding an on/off switch to the Cycle Analyst?
Replies: 12
Views: 1427

Anyone have any input or done something similar?
by v_tach
Nov 17 2007 4:21pm
Forum: Battery Technology
Topic: Adding an on/off switch to the Cycle Analyst?
Replies: 12
Views: 1427

Adding an on/off switch to the Cycle Analyst?

I have the stand-alone CA and the application doesn't have a practical way to install a battery switch between the battery pack and the CA. Are there any special considerations to adding a small switch to the CA's case for the V+ lead so I can power the CA on and off? I assume V+ is the correct lead.
by v_tach
Nov 06 2007 9:22am
Forum: Battery Technology
Topic: Nomex, anyone!
Replies: 6
Views: 1145

What gasses are vented when lipo does go? Nothing too horrible I hope. My comment about fire gasses weren't because of the potential impact of the gasses themselves (as far as exposure such from breathing them) but rather any vented gasses from combustion are extremely hot which can further spread ...
by v_tach
Nov 05 2007 12:00pm
Forum: Battery Technology
Topic: Nomex, anyone!
Replies: 6
Views: 1145

Nomex is a woven textile. Though it may help, it wont completely contain a fire. Nomex is good for resisting direct flame contact but heat and fire gasses will easily vent through the weave. Fire resistant clothing such a racing suits and structural firefighting gear is made of multiple layers of a ...
by v_tach
Oct 29 2007 7:56pm
Forum: E-Vehicles General Discussion
Topic: News: Zippy new electric car looks like a shoehorn
Replies: 10
Views: 1848

My neighbor's garage burned up and the house suffered significant smoke damage a couple of years ago when something went wrong while his Corbin Sparrow was being recharged. Fortunately he was home and able to knock down much of the fire giving time for the fire department to arrive and save the rest...
by v_tach
Oct 18 2007 9:32am
Forum: E-Bike Build Threads / Photos & Video
Topic: Safe's Electric Bike Project #002
Replies: 493
Views: 69265

With 20 D sized cells arranged end to end, wouldn't the mass of the cells alone and any potential internal forces created from bumps and jarring in the road surface create significant compressive stress? Especially to those cells near the ends.
by v_tach
Sep 27 2007 5:53pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Safe's Electric Bike Project #002
Replies: 493
Views: 69265

2. Never sand with your bare hands because that just repeats the errors that already exist. Use a sanding block and that way you are only sanding off the high spots and not digging the low spots any deeper. That line right there indicates your complete inexperience with such work. :arrow: Okay, I'm...
by v_tach
Aug 26 2007 8:15pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Safe's Electric Bike Project #002
Replies: 493
Views: 69265

Don't give people unrealistic expections of how much effort is involved... if you do they will become frustrated and give up. I'm hoping that people will realize that it requires real work and do it themselves anyway. Its possible and easy enough. I've been making plug molds for large scale R/C air...