# Power and Energy, and Torque, (Force), Mass and Acceleration

Alrighty then. This is one of those things I thought I understood clearly, but it appears I didn’t quite get it.  I was working on the book, and needed to describe […]

# More on Balanced Systems: Thoughts While Riding

I’ve been riding around a lot lately, and thinking about balanced systems, and how complete systems are designed, as well as thinking a lot about the design challenges that teams […]

# Transmissions vs. Dual Motors

I’ve been messing around with motors lately, and stumbled on something that I think explains the slightly different nature of electric motors, power curves and transmissions.  This time I’m not […]

# The Lipo Project: Balance Block and the Mini Bus Bullet Block

As is often the case when I’m in the middle of a project I put all this stuff together and kind of forgot to post it here.  Sorry. Here’s what […]

# Dept of Watching Grass Grow: Testing the Turnigy, Part Two

So here’s the final strategy.  (Comment from RC” “ur doin it rong.  but not too rong” The idea is to discharge the packs down to a safe level, (see additions […]

# Dept of Watching Grass Grow: Testing the Turnigy

The primary purpose of testing the Turnigy lipo packs, at least so I’ve been told, is to determine how each cell “drops off”, or, how the voltage decreases as the […]

# Connecting the Charger (Turnigy LiPo)

You know the old saying about a picture being worth a thousand words and all…  well, I seem to have missed the words, “Connect the Main Output leads to the […]

# The LiPo Project… The Connector Strategy

I’ve decided how I’m going to wire these babies up.  Because the Turnigy charger is so cool, and reads out the cell status for each individual cell, I’m not going […]

# The lipo 4s1p Pack Wiring Plan

Here we go…  the wiring diagram for putting together 20 4s packs. One module: The basic concept?  Everything is paralleled.  All the balance tabs, and all the main + – […]

# How a (PMDC) Controller Works (so you can see)

Controllers work by feeding pulses to the motor- full voltage,  on/off, really fast.  What the geeks call it is “Pulse Width Modulation”.  Now, if you want to see that, you […]

Got any good reference or support links for builders?  Gimmee! Reference: EV Album: www.evalbum.com Battery University: http://www.batteryuniversity.com Lennon Rodgers’ “DIY Electric Motorcycle Project” (with EV calculator): www.electricmotion.org Juiced Drag Racing (How-To Guide): […]

# The Second Build- A Different Story

As soon as I built my first boat, I immediately started planning my next. It’s a natural thing, I think, with anyone who’d build something like this, and the bike […]

# “In Situ” Testing of Hall Sensors

(“In situ” is Latin for “not having to take the whole damn thing apart to get at the stuff you want to test.”) Anyway, I don’t know if this falls […]

# Battery Connections

or, “4p24s?  Huh?” How you connect your batteries together is crucial in determining your final voltage and how well your cells will stay even on charge and discharge.  The first […]

# Cool Tools- Essentials for the Builder

…and some not too essentials. Let’s be honest.  Any decent project is really a thinly veiled excuse to buy new, fun tools, right?  If you have your own shop, you […]

# MORE Cool Tools!

What was I thinking that I could fit all my favorite tools into one post?  Here’s more. Air tools- Assuming you have a good compressor (if you don’t, well, clearly […]

# The Co-op Shop / VocTech Angle

If you don’t have the tools or the room for a shop, there are some other options.  Almost every High School and College, not to mention Vocational/Technical school has an […]

# Mounting the Batteries- Part Two- Essentials

Elegant design notwithstanding, there are some fundamental realities of mounting batteries you have to be aware of. First, batteries are heavy.  And dangerous.  Whatever you do, you have to make […]