why is the front tub always dipped?

[STANG KILLA SS]

ive seen this 2938759832475 times on RCC. why is the top windshield bar always dipped down? is this something thats done on 1:1? why?

example
http://filebox.vt.edu/users/leach/RC...d/DSC01122.JPG

[Got Rocks?]

hmmm i was once wondering that myself i think its the angle of the pic i think its suposed to be arched out

[xjman]

I'm going to assume it helps with weight distribution throughout the chassis.

[joecrawler]

it makes them look meaner is what i heard, makes it have more curves to give it a better look.

[dittohead]

Its for looks, and its been done so many times now, some people seem to think its required when building a tube chassis. I personally dont like it, unless it fits into the scheme of the buggy, which it usually doesnt.

[rupps5]

The front upper cage bar should bend out and follow the windshield contour and or up to the roof to follow that contour to give more crush space for the driver.

here is a pic a friends, now totaled car




that may help or may not so, yep!

[EeePee]

rupps5 is right, occasionally.

Originally Posted by dittohead

Its for looks

In the real world, form follows function.

[TMXONR]

Originally Posted by rupps5

here is a pic a friends, now totaled car

What does it look like now

[Highmark]

It can be used to add streangth, because it creates just a little more triangulation and can be used as a point to add even more.


And it looks cool

[Bknight]

if any thing it would weaken it. you want that bar as straight as possible. when your rolling down a hill. and your passenger side hits first on the side of the roll bar, it is going to want to bend or move to the drive side. if the bar is bent it is going follow the bend and push in the direction of the bend. if the bar is straight, the energy apon impact has no where to go but down the bar and to the drive side of the roll cage.

and its not really triangulated since there is no bottum to the top of the roll bar

[Highmark]

Exactly, that's the reason why all of the 1:1 builders bend them.

[Robb]

Originally Posted by Bknight

if any thing it would weaken it. you want that bar as straight as possible. when your rolling down a hill. and your passenger side hits first on the side of the roll bar, it is going to want to bend or move to the drive side.

And how do the forces react when that bar is hit dead in the middle?

[rupps5]

Originally Posted by Robb

And how do the forces react when that bar is hit dead in the middle?

That is kind of the point. The bar would have to bend further to hit the driver if it was bent out then it would have if it was just straight across. Tubes that follow the body also add more rigidity to the chassis than a cage that is just generically placed in the car.

[JasonInAugusta]

It's a RC car...I build'm straight.

[Robb]

Originally Posted by rupps5

That is kind of the point. The bar would have to bend further to hit the driver if it was bent out then it would have if it was just straight across. Tubes that follow the body also add more rigidity to the chassis than a cage that is just generically placed in the car.

Yep, that was kinda my point. Bent-out front bar serves three concerns IMO. 1) point of impact is farther from the driver/passenger; 2) creates a "slide" point so that frontal forces can be shifted; and 3) a straight bar is weak at all points except where it is reinforced, whereas a bent bar, or triangled bar spreads impact loads to each side much batter than a straight bar.

[Got Rocks?]

Originally Posted by JasonInAugusta

It's a RC car...I build'm straight.

good finish it lazy ***

[Robb]

Originally Posted by JasonInAugusta

It's a RC car...I build'm straight.

Good point!! LOL!!!

[ColquittCustom405]

Nice beads....