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Originally posted by bart
further thoughts
the design you are proposing is very short compared to the axel ctr distance , I don't wish to sound contra sending but have you given any thought to straight line stability , Square designs tend to swap ends alarmingly easily . all the books and good handling cars tend to be approx. 1.5 ish to 1.7 . now ready ! everybody shout !
just relating some of the design thought process that I went through.

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Originally posted by tadltd
Bike-engine short prop' to diff... (circa' 2004)

(ignore the crappy silencer, this was to get through a noise test)


undies-03
undies-01

[Edited on 11/12/14 by tadltd]

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Originally posted by bart
Owt hapnin lad.

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Originally posted by JoelP
I once designed a car with the front bones in that style. I concluded it could limit steering lock - but I'm guessing that for track use only you don't really need that much lock. Looks good anyway.

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Description

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Originally posted by ceebmoj
Have you considered making the front frame bolt on? I ask because if you have a front impact it would make it easer to change the sacrificial component.

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Originally posted by Doctor Derek Doctors

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Originally posted by ceebmoj
Have you considered making the front frame bolt on? I ask because if you have a front impact it would make it easer to change the sacrificial component.

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I did have a think about it but its not an eventuality worth designing for, IF someone has a front crash and IF it doesn't do any other damage and IF you have a replacement nose box and IF you have a spare front wing it would save a day of sprinting but thats a long list of IF's to be carrying the extra complication and weight of a bolt on part.

Instead I'm making the nose simply a tubular hanger for the wing, if it gets bent the sort of 'home build' target market who I would hope has made/bought the car would simply cut off the bent bit and weld in new tubes. Its also one of the benefits of keeping the front of the chassis so short, less likely to damage more critical components in a frontal impact.

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Originally posted by JimSpencer

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Originally posted by Doctor Derek Doctors

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Originally posted by ceebmoj
Have you considered making the front frame bolt on? I ask because if you have a front impact it would make it easer to change the sacrificial component.

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I did have a think about it but its not an eventuality worth designing for, IF someone has a front crash and IF it doesn't do any other damage and IF you have a replacement nose box and IF you have a spare front wing it would save a day of sprinting but thats a long list of IF's to be carrying the extra complication and weight of a bolt on part.

Instead I'm making the nose simply a tubular hanger for the wing, if it gets bent the sort of 'home build' target market who I would hope has made/bought the car would simply cut off the bent bit and weld in new tubes. Its also one of the benefits of keeping the front of the chassis so short, less likely to damage more critical components in a frontal impact.

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Hi

I think you'd be much better off making that bit bolt on - having done a nose box at a meeting and changed it c/w the front wings.. just like lots of other folk - that's a standard design feature I'd be looking for.
Plus - design it right and it'll go some way to save the chassis.
Or
Make the nose cone with front wing the support and the structure itself?

Plus I'd forget F3 / FR wings - too small for sprints and hills, you'll need larger - if you go to the right place they're not too expensive either. (can we recommend suppliers on here?)

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Originally posted by JimSpencer
Hi

I built (though not the Tub) mine too - the one in the avatar

IMHO The most important bit is practicality:-
The car must be easy to work on.
Plus
It will need to fit in the trailer's - you normally see car's transported 'nose less, especially as with the modern design of front wing is a good way in-front on the front axle line.

So if it's a fixed structure you'll need something to bolt onto it and then extend forward so with it and the wing removed there's not too much in front of the front tyres?
Perhaps a sub frame that bolts to the wing and then the chassis frame itself?

Re Damage

I've made 3 nose box's too - it's very little more work to make that piece bolt on.
(The first alloy one got bent in a bump, the second one is still ok, but have now changed design to go to the dropped nose full width front wing.)
It means it's a quick fix, if not at then at least between events, they get damaged very easily, especially on the hills.
I, like a number of competitors, would normally carry a spare front wing - I've even seen them stood on - certainly the end plates are best thought of a 'wear and tear' part.. Lol
But it's your design and hence your call

Cost

My new - carbon - front wing, I purchased new in component form (two lengths of wing profile and a large piece of carbon sheet) and then assembled to my spec, it's max width at 1.4m, dual plane and fully adjustable - cost was £350..
Rear wing is the same.

HTH

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