Vingles

what is 2WD ST? whats that ST stand for?

plus2ss

iTrader: (1)

2wd stadium truck?

NitrousBIG

I saw those discs a few years ago and liked the idea right away. But I didn't want to do bolt on (too heavy) so I adopted the monocoque idea for the knuckles / discs.

NitrousBIG

That's cool, never seen that before! I toyed extensively with the idea of cantilevered / inboard shocks but to have any kind of lower CG you pretty much have to use a small cantilever and that results in slow piston speeds and/or massive angular change in the lever arm screwing up the shock geometry. I do have some new ideas that I'd like to experiment with but it would mean fabricating a pull style shock. And fabing a shock (that works well) is a little outside my machining skills at this point.

NitrousBIG

Been working on the front knuckle / steering block / wheel assembly. I really liked the last steering block I made but once I figured out how to make the model pivot like it would in real life I realised the limitations of the design. So I started a new one. This is what I have so far, its not done but I think the design solution is much more elegant and approaching the smoother / organic design I am trying to achieve.

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Just waiting for parts to rebuild my 3D printer so that I can print these parts. I got my new filament for the build but they didn't send the water soluble filament for support structure, it was out of stock at the time of shipping. But that too is now on its way. All of this is OK because the modelling isn't done!

NitrousBIG

Took one look at these views and had to post this. The front shocks are lower than the tops of the tires at ride height!

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With poorly modelled tires.

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Krio

iTrader: (159)

Drawing an imaginary line from the inner hinge pin mount to the bottom of the tire shows that some of the arm is blow this line. At full compression, is the arm hitting the ground?

NitrousBIG

Its fairly close at the back but I think it'll clear. But Once I have the rear hubs and wheels designed I will know for sure.

NitrousBIG

Its close but it clears!

This is a carpet car so I don't need a bunch of clearance. It's worth it for the low CG.

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The front arms aren't done yet and I will check them when their done.

NitrousBIG

I'm still waiting for the printer parts to rebuild it to make these parts; so, I am going through and tweaking all the parts before printing. I got bored and made a quick estimate of what the body will look like, as well as the wings. So here it its. Be kind its a very rough estimation! And the real thing will be made out of lexan that is vacuum formed over wood.

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The body will be in two pieces, the main body and the cab. The cab will bolt on the the top of the main body. The front window can be cut out along with the top of the back of the cab moving the downforce back. Or for even more rear downforce I can cut out the back of the main body to allow air to the underside of the rear spoiler. This design will also allow me to move the cab back and forth to adjust the downforce with the front window in place. This whole thing is designed to be tested in the wind tunnel and the track.

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I am also going to try a rear spoiler. The side skirts will also run low to manage the air around the rear arms.

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YES, I know it different! That's why I'm doing it. To try new stuff.

tvih

Different indeed! While I admire the effort and its goal, I hope you're not too offended when I say that it looks rather... hideous Continuing from that note, one thing I don't like about RC racing buggies is that they don't really look much like any real 1:1 buggies that I've seen - yours takes that one step further.

I mean, being unmanned miniature vehicles they obviously don't have to - but one reason why I like short course trucks so much is because they look nice, very similar to the 1:1 ones. Touring cars have this "benefit" too, but I prefer the offroad driving style. Anyway, for SCTs of course most of that look is the body shell, but that's just natural. Buggies in the meanwhile as a whole don't really look like a real vehicle, or particularly practical for a driver. If you were in the cabin and actually could be in a reasonable driving position there given the superlow profile, I reckon you wouldn't be able to see worth crap. Shock tower and shocks block it all. Makes me wish desert buggies like the AE Nomad DB8 were what the racing buggies are like. But personal preferences are personal preferences, and I'm clearly in the minority considering which way the RC race buggies have evolved!

Anyway, I suppose that's a bit besides the main point of the thread. But make no mistake, regardless of visual preference I'm certainly interested to see how this thing will work on the track eventually!

NitrousBIG

Yah the last body pics are ugly. Working on that! I have to post some concept sketches to give you a better idea of what it will look like in the end.

When I was mocking up my last one it looked ugly too. But I think it came out awesome. Little rough but awesome!

IMG_20161226_174704

faqcya

iTrader: (1)

I'm curious if your final product will be roar legal?

NitrousBIG

At this point everything is legal as far as I can tell (rules are a bit vague concerning some of the things I've designed). But people have changed the rules a few times because of things I have come up with before. I am doing this for fun, to try things and learn. I am not that concerned with how it looks just trying things and learning. The best part of all of this is the aero acting as camouflage for some of the other things I am trying. Honestly the aero won't make that much of a difference, its just one piece of the puzzle.

EDIT: The battery is illegal, its a super shorty. Come on ROAR get with the times, make shorties and super shorties the min size! or just get rid of battery size rules.

fredswain

iTrader: (1)

I think following ROAR rules in regards to wheelbase and width is a good thing but I wouldn't be too concerned with every rule detail. This is a design exercise. You need to figure out what's possible. The battery rule is idiotic anyways.