PDA

View Full Version : [OLD Hack] Thru-Tube Side Damper


color01
2011.05.27, 12:32 AM
Sometime last year I spent about 15 minutes dumpster-diving and cracked up a through-tube side damper system for my MR-03. :D

http://a.imageshack.us/img709/1707/img0380zo.jpg

I found a bunch of steel shafts and some brass bushing tubes that fit nicely around them, in a ziplock bag, in the recycle bin. :cool: Realized that they were 2mm diameter (1.98mm caliper confirmed!), stuck them into some spare shock ends that I got from Philip, then realized that they were the EXACT length I needed to fit one right in between the mounting holes for the PN tri-shock. I wrapped two layers of electrical tape around two of the bushings to get the right tube length, then superglued the tube assembly to a spare MRCG servo horn. Bolted this to the motor mount with no fitment problems at all.

http://a.imageshack.us/img705/8874/img0415s.jpg

On the chassis side, I sacrificed a disk damper plate and superglued a 3mm ID piece of plastic tubing to the end, along the centerline of the car.

http://a.imageshack.us/img294/1299/img0416x.jpg

And what the heck, everything fits!

http://a.imageshack.us/img194/6845/img0417et.jpg

Although this prototype is not raceable (probably would disengage after a few bumps), it works well on the bench. Zero play, damping feels good.

http://s42.photobucket.com/albums/e345/ ... I_0418.mp4 (http://s42.photobucket.com/albums/e345/color0/?action=viewĄt=MVI_0418.mp4)

Hadn't done any homebrew experiments like that to my micro RC's in such a long time, feels great. :cool: Better yet, I know how to design the final product to retain this wonderful smoothness AND have some springs on the ends to keep the functionality of the PN tri-shock. In a production version the shock would be mounted similarly to how the Serpent S120 does it:

http://a.imageshack.us/img405/6381/imageqwa.jpg

The fun part of this concept was that I could replace the damper shaft with a 2mm carbon one, for ridiculously low weight and minimal additional friction (at least not with thick grease, and with a Delrin/plastic damper tube). I really wanted to try this option out, personally. I even have 2mm carbon shaft right now, just not the right plastic tube to reduce wear on the shaft.

Anyways, I think this project, originally an attempt to improve upon the tri-shock, is now defunct so I thought I'd post it up as a record of a neat little experiment. That said, I have a new prototype coming in for another possible damping configuration, it's got much more potential than this system and could definitely make it to production. ;)

EMU
2011.05.27, 03:03 AM
More of a proof of concept design than a race test prototype... interesting idea. I had thought about doing something similar for the F1 a while back, but never got around to it.

Felix2010
2011.05.27, 12:10 PM
Awesome work color0. I like the idea a lot, I'm interested in hearing about your new concept that you think has got some legs to it....:)