carlknight1982
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| posted on 14/1/09 at 01:19 PM |
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Floor
Im wondering what grade of ally to get for my floor and how big of a sheet i will need to buy, also how you guys bonded it, im thinking silkaflex and
rivets
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Mr Whippy
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| posted on 14/1/09 at 01:22 PM |
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3mm checker plate looks good. Attach as you suggest.
Fame is when your old car is plastered all over the internet
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JohnN
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| posted on 14/1/09 at 01:41 PM |
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Big enough to cover what you need to cover - you're the designer !
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nick205
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| posted on 14/1/09 at 01:43 PM |
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3mm is a little excessive!
Mine's 1.6mm bonded and rivetted.
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alistairolsen
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| posted on 14/1/09 at 02:07 PM |
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just to check I have this right, the book reccomends 18swg steel which is 1.22mm.
This means given densities of 7850kg/m3 and 2700kg/m3 one could use 3.54mm alluminium sheet for the same weight.
using the respective youngs moduli and some approximate breadths, for longitudinal bending one only needs 1.8mm.
Weight saving of nearly half!
(someone will be along shortly to correct me!)
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CaptainJosh
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| posted on 14/1/09 at 02:11 PM |
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But there not the same material  Steel is allot more likely to take the pounding and fatigue required of a floor.
I went for a compromise and paneled where my seats are in steal and then the rest in ally. When your 70kg+ bum comes down on the seat over a hill you
want to make sure the seat mounts are on something nice and solid, with a decent margin of error.
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alistairolsen
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| posted on 14/1/09 at 02:15 PM |
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I wouldnt even consider mounting seats to the floor which is why Im welding tbs to the chassis rails for these with some proper reinforcement.
As far as being the same material, as long as youre not going beyond the elastic range then youre only interested in how easily it bends and how
easily it stretches.
The only bit taking any heavy footloading is immediately ahead of the seats tbh.
Id happily use 2mm alloy for the whole lot and never think twice about it later
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CaptainJosh
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| posted on 14/1/09 at 02:26 PM |
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If your mounting it to the rails then its no problem then 
[Edited on 14/1/09 by CaptainJosh]
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antonio
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| posted on 14/1/09 at 06:22 PM |
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if seats are fix on it, i'll go for 3mm.i had 2mm thick, and ali seized when i crashed...(and was not a big crash)
you should reinforce it
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grazzledazzle
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| posted on 14/1/09 at 07:18 PM |
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I would be a bit wary of ripping my knackers to pieces with a thin ally floor. Wouldn't take a big piece of debry on the road to cause
trouble... 
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