Need advices and suggestion on Conceptal Chassis Design

[skyliner34gtr]

Hey guys, I just decides a conceptal chassis design for our kart, can i have some advices and suggestions on it?

Thank you very much!
Jun

http://i7.photobucket.com/albums/y279/yotad/enginemount2.jpg

http://i7.photobucket.com/albums/y279/yotad/enginemount1.jpg

http://i7.photobucket.com/albums/y279/yotad/chassis.jpg

http://i7.photobucket.com/albums/y279/yotad/chassis1.jpg

[skyliner34gtr]

Hey guys, I just decides a conceptal chassis design for our kart, can i have some advices and suggestions on it?

Thank you very much!
Jun

http://i7.photobucket.com/albums/y279/yotad/enginemount2.jpg

http://i7.photobucket.com/albums/y279/yotad/enginemount1.jpg

http://i7.photobucket.com/albums/y279/yotad/chassis.jpg

http://i7.photobucket.com/albums/y279/yotad/chassis1.jpg

[Botin]

What about triangulation?
Where are your, shock/wishbone/bell crank/mountings?

What you should do is, place your shock/wishbone/bell crank and so on, and when do your chassis to the points. And remember triangulation.

[The AFX Master]

And also, what about fixing the engine directly on the side structure and not via clamps on the front (also the front tubes are way hard loaded in bending with the engine weight.)

[D Collins Jr]

Jun,
I'd recommend talking to some of the other guys who are designing and coordinating with them, because the first thing that jumps out at me is your roll hoop bracing. It seems like you'll probably want to run an intake, and the way you have your bracing looks like it will make that quite difficult to package.
I agree with AFX that you should look at altering your engine mounts. In addition to the reasons he provided, those look fairly heavy and would make servicing complicated. And remember to bring tubes together at node points.

On a positive note, I do like that it looks like your motor can easily drop through the bottom of the frame.

[billywight]

In addition to the points mentioned by others, I suggest you start over - Start a 3D sketch with all your hard points: suspension pickup locations, steering rack location, driver location, engine location, drivetrain location, etc. Then connect all these points together with tubes, following the FSAE rules for sizing and location, and remembering triangles. This will give you a much better chassis - you want to design the chassis around the suspension, not the other way around.

[HenningO]

Besides what everyone else said, manufacturing a roll hoop with a continiously changing radius like yours, is quite difficult. They way it is usually done is by have smaller radius bends and the straight sections between them.

I think starting over probably the easiest way to implement all the feedback, good luck!

[skyliner34gtr]

thx for all your advices. This design will not be processed due to different problems on the monting and stress issue. I am actuly making a new one, i will use all the advices posted by your guys on the new design, i will put the new design here as soon as i finish, hope i can get more feedback. thank you so much