jester
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| posted on 9/3/20 at 10:37 PM |
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Seat Fitting Safely
On my Tango Jester under the seat runners I was surprised to find strips of Alloy that where shaped to the floor pan
The alloy is about 8mm in thickness is this strong/thick enough to take a load if needed to in a crash
Or would the bolts just rip right though the alloy making the seats like ejector seats
Have tried to get some steel the same thickness shapped but there machine cant shape to that thickness
I want to use Tango on track days so don't what any problems getting it checked over at the circuit
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melly-g
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| posted on 9/3/20 at 11:06 PM |
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Are your seatbelts fixed into the chassis or through the same aly plates?
The seats won't eject you if your belts are OK!
I'd be more worried about going through the floor if it's not strong enough!
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MagicalTrevor
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| posted on 10/3/20 at 06:34 AM |
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Motorsport UK regulations state 3mm steel and 5mm alloy for seat mounts so 7mm alloy exceeds that. If your fabricator can bend 3-5mm steel then I’d
be comfortable with that, especially if the belts are bolted to the chassis.
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nick205
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| posted on 10/3/20 at 12:49 PM |
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I didn't track it, but on my MK Indy I built frames from 25x25mm right angle steel to bolt the seats to 3mm steel strips in the chasis floor.
The 4 point harnesses were bolted to designed in points in the chasis.
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jester
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| posted on 10/3/20 at 05:02 PM |
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quote:
Originally posted by melly-g
Are your seatbelts fixed into the chassis or through the same aly plates?
The seats won't eject you if your belts are OK!
I'd be more worried about going through the floor if it's not strong enough!
Seat belts are fixed to side and centre tunnel not in the same place as the alloy
I'd be more worried about going through the floor if it's not strong enough!
I am a big lad but not that Big
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jester
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| posted on 10/3/20 at 05:05 PM |
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quote:
Originally posted by MagicalTrevor
Motorsport UK regulations state 3mm steel and 5mm alloy for seat mounts so 7mm alloy exceeds that. If your fabricator can bend 3-5mm steel then I’d
be comfortable with that, especially if the belts are bolted to the chassis.
That's Excellent news. Thanks for that 
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jester
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| posted on 10/3/20 at 05:22 PM |
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quote:
Originally posted by nick205
I didn't track it, but on my MK Indy I built frames from 25x25mm right angle steel to bolt the seats to 3mm steel strips in the chasis floor.
The 4 point harnesses were bolted to designed in points in the chasis.
This is the Alloy strips
Will have get some Harness points welded in after I get Tango on the road/Moted.
Just the standard seat belts for a while
[Edited on 10/3/20 by jester]
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jester
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| posted on 10/3/20 at 05:31 PM |
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quote:
Originally posted by nick205
I didn't track it, but on my MK Indy I built frames from 25x25mm right angle steel to bolt the seats to 3mm steel strips in the chasis floor.
The 4 point harnesses were bolted to designed in points in the chasis.
I Have to go steady on what I put under the seat or my head will be to high for the Rollbar 
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nick205
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| posted on 11/3/20 at 12:26 PM |
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quote:
Originally posted by jester
quote:
Originally posted by nick205
I didn't track it, but on my MK Indy I built frames from 25x25mm right angle steel to bolt the seats to 3mm steel strips in the chasis floor.
The 4 point harnesses were bolted to designed in points in the chasis.
I Have to go steady on what I put under the seat or my head will be to high for the Rollbar
The frame I made only raised the seats by 25mm and my head was still below the roll bar. For eye protection I chose to wear a full face crash helmet
with visor as well. Didn't fancy grit or a bee in the eye!
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nick205
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| posted on 11/3/20 at 12:28 PM |
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You can't see the frames, but this gives an idea of the seats fitted...
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nickm
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| posted on 11/3/20 at 07:55 PM |
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Hi
I have a J15 and there is no chassis rail of any sorts between the pedals and the rear of the seats across the width so that alloy was probably put
there by the buider to try and make the seat harder to rip out and easier to fit but as someone has already said its the belts that will keep you
in.
If it was that dangerous it wouldnt pass IVA thats how i think of it (but id still prefer a couple of chassis rails)
Nick M
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