Greyscale Racing MRCG

color0 · Post by **color0** » Fri Oct 12, 2007 7:14 pm

Yeah, I've gotten a couple gentle reminders that WD40 isn't lube. Slipped my mind, I have some grease in there now.

I suppose I'll have to allocate some time this weekend to take the mill apart and clean everything up. Knock on wood that everything works fine afterwards.

Murdoch · Post by **Murdoch** » Fri Oct 12, 2007 10:16 pm

one thing i've wondered.. can I shove a 180 size motor in there.. like a mamba?

sidewinder · Post by **sidewinder** » Sat Oct 13, 2007 12:24 am

Murdoch wrote:one thing i've wondered.. can I shove a 180 size motor in there.. like a mamba?

I got an idea where you can shove that motor...Awe, never mind

Murdoch · Post by **Murdoch** » Sat Oct 13, 2007 11:12 am

hehe, jealous?

color0 · Post by **color0** » Sat Oct 13, 2007 8:36 pm

No, not with this design. The GSR guys, however, have influenced me to design a mount that allows for 12mm AON/Feigao/Losi/etc. BL motors.

Murdoch · Post by **Murdoch** » Sun Oct 14, 2007 12:41 am

awesome.

color0 · Post by **color0** » Fri Nov 02, 2007 11:34 pm

First functional prototype!

Pics first.

Comments:

1) The mill countersunk two of the holes a little deeper than the rest. This might have something to do with my fixturing platform (it's not perfectly trued yet), so I'll look into it.
2) I accidentally used climb milling for everything, and had to file the parts a bit to get the finish you see here. Still, not bad.
3) The chassis went together very smoothly. After the finishing filing, I had only minimal filing to do to make the kingpins fit into the holders. And once in, they are very snug.
4) The rear suspension is a good stiffness up and down, but the roll stiffness is rather high, even for my tastes. I do not know how this will factor into real-world driving yet.
5) The front end will not flex unless you hit something really hard. I've been testing it with Kyosho hard springs and so far there is no visible flex.
6) The tierod movement is a little bit stiffer than the MR02, although this is partially because I preloaded the hard springs.

All in all a decent job, I hope to have the elecs soldered together quite soon and some bearings, wheels and tires (doh, I sold 'em...) and this car will be ready to go!

ynad · Post by **ynad** » Mon Nov 05, 2007 9:34 pm

Looking really good

Curios to see the real-world driving too. Is front suspension possible to adjust (camber, caster)?

color0 · Post by **color0** » Wed Nov 07, 2007 2:02 pm

Got some more work done. The car is currently riding on plastic and metal bushings (!) so don't expect it to run quite yet.

Note the new uber-low oil damper config. Now the only things that even reach wheel level are an antenna, two motor wires and a crystal holder. That's pretty darn low if you ask me.

Front end detail: Kingpins are held up by exactly 1/8" of fiberglass milled to spec, it's stiff. I also got a clean conversion on the HS-50; you'd have to know beforehand that it was a 3-wire servo...

Rear end detail: Got those side springs in, they work well and don't click on the spring perches as I had worried about earlier. Also illustrates the height of the oil damper and the amount of leeway you have to shift the batteries back and forth.

r/cdrifter7 · Post by **r/cdrifter7** » Wed Nov 07, 2007 2:56 pm

VIDEO!VIDEO!

SHAUN · Post by **SHAUN** » Wed Nov 07, 2007 2:59 pm

How can he have a video, it doesn't look like its runs yet.

sidewinder · Post by **sidewinder** » Wed Nov 07, 2007 8:10 pm

SHAUN wrote:How can he have a video, it doesn't look like its runs yet.

...well, he could make a really boring video.

Murdoch · Post by **Murdoch** » Thu Nov 08, 2007 12:57 am

aw man that thing is absolutely dope.

color0 · Post by **color0** » Thu Nov 08, 2007 9:11 pm

With the exception of a battery pack and a bearing set, MRCG #001 is ready to go.

Edit: Considering the ball diff, motor mount and oil damper, it appears I've managed to shave a few grams off the MR02's chassis weight:

jordanQ · Post by **jordanQ** » Thu Nov 08, 2007 9:21 pm

i love you

That is awesome!

I am personally not much into mini's but if i were i would totally buy parts for this!