Scrub line solution?

Tell that to all the baggie Einsteins. There is no subs***ute for properly engineered suspension and airbags are certainly no subs***ute for properly engineered suspension.

Airbags - a triumph of marketing and stupidity over common sense and sound engineering. Rant over!

 

5 pages???
Do a search for a supplier of RV bumper casters

 

dont forget these too

 

This post is dumber than the dryer sheet post by a long shot.

 

BWAAHAHAHAHHAHHAHAHAAHAHAHAHA, (sputter, gasp, inhale) HAHAHAHHAHAHAHHHAHAHHHHAHAHAHHA (ow) (gasp, inhale).


Dayyyyummmm guys, that's harsh, funniest I've seen in a while though.

(ow)

 

I think with all the dumb things people are doing these days that in 40 years people are going to be going crazy undoing all the ******** in order to build real hot rods.

 

Well said Weasel. I find what some are willing to do to follow the lawnmower fad really disturbing.

Regarding the catch it with training wheels concept......you have a car with a scrub line issue and install wheels at a point that will contact below the scrub line. With this you will have a dangerous lack of suspension travel. It's not safe, dumb idea, no go.

 

Are the roads that bad in South Africa that you need to worry about blowing tires on a regular basis?

 

Yep..and I still haven't mentioned anything about shoving a 9 inch in your box....

Man I miss the Dryer Sheet post.

 

I am constantly amazed that some people are so stupid as to even think about knowingly and deliberately building a dangerous car from scratch (because it's "kool" or whatever the mantra of the day is - depending on wind speed/ambient temperature/relative humidity/moon phase/alignment of the constellation and the effect of all of these factors on their brain cell). Then they consciously go public and start asking about how to band aid their stupid, dangerous and flat out illegal build ideas. Kut the krap - grrrr, woof, growl....

 

Solid or undamped rudimentary suspension means it'll bounce on impact? Thanks, that's a good reason.

Some are pretty bad, but no. See below.

Look, I've got no intention of building a car with this. It was a purely hypothetical idea. It's not like I've got a build sitting on the garage floor and got out the tape measure and, oh ****.

I'm not convinced that it won't work but I haven't got nearly enough evidence that it will work, and frankly it's not worth the investment of doing all the research. Not to me, at least, because as I say, I don't see myself building anything soon that will need it.

Weasel, barking at me from another country isn't going to get people to build their cars safe. I know all the issues with scrub line, but say I'd been a raw teenager who doesn't have a clue? You wouldn't have influenced him because he still wouldn't have a clue. He wouldn't understand why his idea wouldn't work; all he knows is there's a guy on the other side of the planet thinks he's a dog.

I might not have the practical experience of building cars that some of the guys here have, but I do know design process. You have to be able to consider weird ideas, not to implement them unthinkingly but to see where they go and to learn from everything that happens on the way. You might go past a whole bunch of bad ideas, but chances are you might just pick up a good one or two. Sometimes the obvious isn't that obvious, and you have to go through a process like this to get to it. Sometimes you can kick yourself because you couldn't see the solution that was staring you in the face all along. Sometimes the process just forces you to go back and see if your problem really is that much of a problem, if an ac***ulation of small adjustments might not make it go away. Hence "consciously going public".

It might be apocryphal but there is the story of rocket scientists at NASA struggling with a dilemma of flow-vs-velocity in order to get the thrust they needed. Whatever they did to increase flow reduced velocity, and vice versa. They were stumped. But someone had the idea of "consciously going public" and asking people with no expertise what they thought. Someone suggested using several small engines instead of one big one. Problem solved.

So come on, guys.

Seriously, though (and equally hypothetically, as both my projects are within the rule as it stands). Why the four-wheel scrub line rule, when blowouts are as rare as they are these days? especially the case of both tyres on the same axle blowing out. I've had two blowouts on the same side of the car, having hit an unexpectedly-positioned kerb at speed on an unfamiliar road in the dark; but I can't think of a situation where you'll lose both rears. Surely diagonal scrub lines across the car (left tyre to right rim and vice-versa) would suffice? I'm asking?

I think it's a good idea to consider diagonal front-rear scrub lines in addition to four-wheel scrub lines when it comes to overhangs. You might be within the rule and still be on the extreme end of the frame if you lose one tyre. I've set up my projects to clear a line projected rearwards past the bottom of the rear rim, from the front contact patch.

 

your little wheels will not have enough traction to maintain directional stability, so it will still drop, slide, shimmy and crash.

 

Yes, that's what I'm suspecting. I could go and build test rigs and take measurements and find otherwise, but I'm not about to spend that money on something I'll probably never need. But thanks, Tinman, for a proper argument!

 

I'd rather have the frame or suspension dig into the road to slow me down.

 

I wouldnt want to be skating around on tiny wheels at high speed. Same thing I said in my first reply, post #4. Takes this many pages????

 

yep, it appears so!!

 

The answer is to design so the thing is still stable minus the odd wheel,
YouTube - Citroen GS running with three wheels. 2
hardly matters about a flat when the car can still drive on three.

 

We are multi-millionaires from a very simple idea a lot like this one (non-HAMB related). But it took about 12 years of hard work and failures before things really started taking off, not just 2 years.

There were several people like you along the way who gave us the "benefit of their advice" and "encouragement". They are still saying the same things today to anyone who'll listen, in spite of overwhelming evidence. I wonder why. I guess it makes them feel important and smart.

Anyone who works hard and preservers can do what we've done. It's not rocket science.


















Just kidding - I'm really just a poor, dumb guy with bad ideas and no clue.

 

That expains how this Zombie Thread got back to the top...