Deathblades/RazErBlades: Race to the Finish, Part 2

Time for Version 2.0…

After falling over for about 10 hours, I returned to MITERS to tackle the last Double DEC’er board and the left skate. I had a few track notes in my head left over from the assembly of Deathblade-R that facilitated faster assembly of Deathblade-L.

I originally was going to put together the experimental Double DEC’er along with two “permanent” ones. Since I didn’t find that necessary any more, only one of the boards will be built out. This time, I started with SMT parts first, then moved onto the headers and through-hole parts. Sidebullets and trace reinforcement were also added while the board was unmounted.

I also stripped the other battery pack and built the power switch harness beforehand, so everything just dropped in.

The batteries are retained by gravity, and the DEC boards simply drop on top of them and seat with double sided tape.

And Deathblade-L is (mostly) complete. The motors have no connections yet because I’ll eventually have to take them apart to glue the magnets in. I decided to save on that assembly step for now.

test video

This is probably what all 1.2 of you have been waiting for. Behold, test number zero of RazErblades!

This literally was the first ground test. I had not ridden them around unpowered beforehand, or really tried them loaded on the ground. My unsteadiness and lack of confidence and machismo are evident, but I start getting used to the feel before long.

Then I broke everything.


While executing a T-stop from a slow speed, the brazing joints failed on Deathblade-R. Fortunately, I was almost at a standstill by then. It was more embarassing than damaging, and the traction unit still worked.  Regardless, this reveals some deep flaws with the design, namely that I don’t have any patience to actually put things together the right way. The brazing on this frame was done very quickly and poorly, with relatively little penetration or filleting.

As I’m less than satisfied with these frames anyway, and still have a month before Otakon, I’ll probably rebuild them soon. Expect a return to my usual slots, tabs, T-nuts, and standoffs design paradigm. Or perhaps I’ll just run a TIG torch right along the edge of all the joints to melt everything in place.

In the mean time, THEY’RE ALIVE! Well, sort of.


  • Remanufacture the frames. I’ll also have the chance to optimize geometries and cavity sizes now that I know how all the components actually fit together
  • Revise the wrist controller for more controls flexibility. I found out that I would actually like to have the ability to turn on “brake” mode if possible. Fortunately, I have more Lilypad boards.
  • Wait for the motor magnets to finish the left two motors.
  • LEARN TO SKATE. This is quite important if I actually want to wield these in a non-idiotic fashion. I need to at least learn how to make my way around on inlines. I intend to do this using the RazErblades, since the hub motor design offers minimal drag and I can actually use them as normal unpowered skates.

One thought on “Deathblades/RazErBlades: Race to the Finish, Part 2”

  1. Hey there, ive been theorising getting something like this going for many a year now. And it is exciting to see someone has actually had the money/time/expertise to get it off paper. As far as learning to rollerblade, thats the easy part! Get ureself a pair of cheap inlines and zip tie weights to them. Get going on them and im sure after a few weeks u’ll be pro, btw i had no balance till i learned to skate and at 6’5″ it was a hard climb. Believe me you will not want to learn on these. They will get battered the crap out of! (Take this from experience as I have progressed to an intermediate/advanced skater and my first pair look like they’ve been thrown under some tank tracks and then given a thorough blend in an industrial sized V8 blender) Anyways back to the topic: are you sure a wrist pad is the best thing? stopping yourself after a fall is done by your wrist guards and the shock is a stong one if you were going at speed. I see expense ahead with that!

    Seriously i love what you’re doing here, I’ve been watching it for a long time. Its like taking my dream and sticking it in the hands of a pro. You’ve taken it much further than i could have ever done.

    Oh! finally as an aside, i would have put more points of contact between the boot and the frame, looking at the bracket that was bound to get a good bit fo bendy wendy goin on. Look at aggressive skate fixings, maybe thats what you will be most successful with???

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