Any advice for our Chassis Frame?

[beeno]

http://www.mediafire.com/view/?t35rn23j18dbdrc
http://www.mediafire.com/view/?g7nasccxeo6p9xb
http://www.mediafire.com/view/?po365bsh63b8hla
Any kind of advice/criticism is welcomed!
We are participating for the first time.

[Dash]

On your front and rear roll hoops you have a bend in them near the upper side impact bar. I suggest you move the bend so that the middle of the bend meets up with the upper side impact bar. I'm pretty sure that is a rules mandate about bend bars needing support at the bend.

I would check the radius at the top of your main roll hoop. If you are bending it yourself, it might not be a problem if you can get a die. If you are having another company bend it for you, find out if they have that radius tool. We have had to change the radius on ours in the past to be able to manufacture it.

The seat back bar ( shoulder seatbelt bar ) may or may not need to move up or down. I would rough in a model of your seat and of your tallest and shortest drivers to make sure you will pass the seatbelt rules.

Edit:
Markus caught something I didn't see, i though you only uploaded one photo. You definitely need that triangulation.

[Markus]

From a quick look it doesn't seem too bad.

-Check rule T3.13.6, currently your frame doesn't comply.
-I'd triangulate the backbox and maybe also cockpit upper walls (find tube size with good stiffness gain compared to added weight).
-Engine seems to be quite high but it's "understandable" for the first car.

[Dunk Mckay]

Originally posted by Markus:
-Check rule T3.13.6, currently your frame doesn't comply.

Is that because the bend in the hoop below the upper rearwards member means it is not technically triangulated? Or is there something else?

[Dash]

Originally posted by Dunk Mckay:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Markus:
-Check rule T3.13.6, currently your frame doesn't comply.

Is that because the bend in the hoop below the upper rearwards member means it is not technically triangulated? Or is there something else? </div></BLOCKQUOTE>

It states the triangulating member has to reach back to the upper side impact bar.
"From the lower end of the braces there must be a properly triangulated structure back to the lowest part of the Main Hoop and the node at which the upper side impact tube meets the Main Hoop"

[Dunk Mckay]

Ah yes. I did see that, but it didn't click. Think I'm just overworked at the moment and drew a blank. That's what this job'll do to ya.

[beeno]

@Markus, markus thanks a lot for pointing out the rule infringement! we have corrected our mistake, we have also increased the height of the front roll hoop bracing as per the rule T3.4.1. Also we got rid of a few extra frame members in our triangulation(and put them to better use http://fsae.com/groupee_common/emoticons/icon_wink.gif)Btw our engine is high because we are using stock oil sump.

http://www.mediafire.com/?m188...auwf,5t7rqvddxyc3hyf (http://www.mediafire.com/?m188b3l3o32ipnk,ffyiw2f2lm8auwf,5t7rqvddxyc3hyf)

[Dunk Mckay]

It also looks a bit short, are you sure you comply with he 915mm leg rule? Don't forget that has to be behind the pedal box.

[AxelRipper]

Close, but not quite. Look at T3.13.6 again, namely "From the lower end of the braces there must be a properly triangulated structure back to the lowest part of the Main Hoop and the node at which the upper side impact tube meets the Main Hoop."

Then check the rules definition of "upper side impact tube."

[beeno]

we have made some 'drastic' changes. have a look:

http://www.mediafire.com/view/?u1dc0j0uvcs441z

[Roundabout136]

Beeno,

Is there a bend in your main roll hoop above the side impact bar?

[beeno]

Originally posted by Roundabout136:
Beeno,

Is there a bend in your main roll hoop above the side impact bar?

Yes. Why do you ask? did i break a rule?

[Roundabout136]

Yes, check rule T3.11.5

[Dunk Mckay]

Have you been reading "Learn & Compete"?

[sarim]

Originally posted by beeno:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Roundabout136:
Beeno,

Is there a bend in your main roll hoop above the side impact bar?

Yes. Why do you ask? did i break a rule? </div></BLOCKQUOTE>
The rule says any bends in the SIDE VIEW should be braced, i dont think there is a bend in the side view, beeno...know your chassis!

[AxelRipper]

I don't see anything in your newest frame that wouldn't pass rules, at least in my view.

Good Luck!

[Francis Gagné]

I don't see anything that is not rule compliant (in side view anyways) either Don't take it as cash though. But I had a question for you.

Is the last square at the end the place where you will fasten the suspension?

If so what do you think will happen when you will get upward or downward force from the A-arms on the upmost rear points?