Yokomo SD Carbon Tub Chassis!

[Chrissy C]

If you have time take a look at the Fybre Lyte web site. I have seen a SD tub carbon chassis, take a look and see what you think!

[scott taylor]

gotta get it looks so good wonder how much it is

scott

[johnbull]

Hi friends. Greetings from Malta.

Andrew East commissioned Fibre Lyte to make that tub chassis.

I saw Andrew's original and it looks very smart. And if it does help reduce tweek then it's worth every penny.

Andrew, if you're reasing this can you give us an up to date report.

Regards

Joe from sunny Malta.

[andy east]

Hello people,
The chassis that Joe has seen is the same chassis that is pictured on the Fibre-Lyte website.
Our original aim was to produce a chassis that didn’t tweak after impact, we achieved this instantly with the 1st prototype of the chassis version 1.2 (V1.2).
With a tub chassis you can remove the top deck because you do not need this for torsional rigidity (twist), this means that you are relying on a single item to keep its shape. Plastic or graphite chassis are ok, but with the extreme heat that the motors and cells are currently generating during a race the chassis can expand and soften during a race, so it is still possible for a plastic/graphite chassis to tweak mildly after impact.
A carbon fibre tub chassis by it’s very nature will not expand/contract with temperature, and will always return back to it's original shape after impact.
V1.2 had all the holes/cell slots etc in the same position as the standard chassis (SSG).
The latest generation chassis (V1.3) is quite a substantial step forward from V1.2, we have removed the allocation for the lower centre brace that is on the standard car, as we found it is not needed with the carbon tub chassis. This has allowed us to move the cells inboard toward the prop-shaft.
With V1.2 our Left-Right weight distribution was a 32g bias to the cell side. With V1.3 we have reduced this bias to just 13g heavier on the cell side.
After we had finished with V1.2 we realised we had been far too conservative in the thickness of the chassis, so for V1.3 we altered the lay-up (layer by layer arrangement of carbon fibre) under the guidance of Fibre-Lyte we made V1.3 thinner but still maintain the same torsional rigidity (twist). V1.3 is now 22g lighter than previous and is 0.45mm thinner. The thinner chassis material gives the main advantage of a substantially lower centre of gravity over V1.2.
What does this mean on the track? Well, simply you have car that will change direction faster and will do so with more stability. You will also have a car that will hold a tighter line than before and it will also hold onto that tighter line for longer, this allows you to apply the throttle that little bit earlier than before giving you a better run out of the corners. The improved weight distribution means that the car will feel much more neutral in the middle of the corner when it is at maximum load, and best of all, it doesn’t tweak.

If you have any other questions please post them here, I will keep tabs on this topic during most of the day and am more than happy to answer your questions. If you wish to know about prices please e-mail me directly to andy_east123@hotmail.com as I don’t think the moderators would appreciate me posting them up here. I will respond to you ASAP.

Thanks
Andy East

ÆAST

[BC Rog]

Andy,

I'm thinking of this chassis as the basis of a shaft drive, Yokomo transmission, off-road car I currently thinking hard about.

My question is that I would still like to run the topdeck to deal with the jumps an the like, not probs with doing that is there??????

Also do you think the nice people at Fiberlyte / yourself would make me a slightly longer one as I'm looking at something like 10 mm on the wheelbase and running the gearboxes further apart by a similar amount to make room for a slipper clutch???

I would be very interested in your answers ... this is a very serious request!!

Rog

[DA_cookie_monstA]

To make the tub chassis 10mm longer would mean a whole new mould for a one off, why not look at modifying the propshaft to accomodate a slipper?

[stevieteee]

Wow!

I gotta have one of those:) Pity it's not made of SSG!

Andy can you make one out of SSG?

Steve

[andy east]

Rog: Sorry, I have not designed this chassis for off-road, only for touring cars and the Yokomo SD.
To make the chassis 10mm longer would mean a brand new mould and effectively starting from scratch, it just isn't a viable option at the moment... sorry.

stevietee: No SSG. ;)

to everyone: I cannot stress enough that this chassis must not be used with a top deck. We have gone to great length to remove it, please don't go and stick it back on again ;D

Thanks
Andy

[BC Rog]

Andy,

fairy enough mate. Looks like I will have to go twin deck for the off roader though, shame as it would help with the dirt proofing no end!!

The off-roader would have basically been a wide SD, with a slipper and some naughty suspension!!!

I want to make the car longer for stability. Better to do it in the chassis than by offsetting whishbones and the like as odd driveshaft angles are not nice for various reasons!

Rog

P.S. Think it would flex to much on landings etc without the top deck in off-road....

[andy east]

Hi Rog

"P.S. Think it would flex to much on landings etc without the top deck in off-road...."

This chassis doesn't have any flex front to back. It has a carbon tube that runs above the propshaft that is attached to the top deck pieces via ball joints. It is stronger than a top deck becasue the top deck will bow way before the tube will.

Sorry I can't be more help to you Rog.

Andy

[Phil C]

Can sum1 pm me a link to the fibre lyte site plz
Cheers Phil Chambers

[DA_cookie_monstA]

http://www.fibre-lyte.co.uk/

[rocketrog]

If you have time take a look at the Fybre Lyte web site. I have seen a SD tub carbon chassis, take a look and see what you think!

[andy east]

Rocketrog, what was the point in that post? do you have a question? or were you just bored?

Andy

[Cy]

:)
I allways wanted to produce mysef such a chassis but I alway lack the time. I wanted to do it narrower and double butted (removing some material on the no so stressed areas but on the "cooking" not with a CNC and I wanted to use some alu in motor area and...) but never will have the time ;-))

Congratulations for your work. I mailed you to get the price, let's see if I can afford it ;-))

I am looking for some carpet setups or shock info for my yoko, do you have some?

Cheers

Cy

cybercorreio@hotmail.com

[andy east]

Cy, Just PM'd you.

Back to the chassis, we can now supply a Ti Turnbuckle to brace the front and rear of the chassis. So you don't have to make one up anymore.

Cheers
Andy

[Craigs Cuuz]

Mine's on order ;) Should have it in 2 weeks :P My SD had it's first competetive outing yesterday and i need it to change direction quicker...... Watch this space, i'll post up what i think of it after my next race meet on 9 November (assuming i have got the tub by then)

I can't wait ;D