C4.1 Chassis

[daz]

Originally Posted by Chrislong

It just need a brace from top of front cell mounts, to the front brace. To thin strips of CF would do it. Would still give twist flex, but reduce kickup flex..

Mine bent by 1-2mm, but I did have a few lairy moments on the straight... and it bent back with my knee easily. I would have expected it to have bent, I didn't feel any effect on the track, the car felt great!!!

Thats a good idea, but when all the radio gear is installed theres not much space left, only enough to fit a couple of pubic hairs. They need to go down the old Cougar route and form a chassis with sides, I never saw one of these bend.

[mattybucks]

Or a Mardave Cobra. I've seem people putting tent pegs in the ground with them.

[tony12795]

Chris, how do you know you bent your chassis 1-2mm ?

T

Originally Posted by Chrislong

It just need a brace from top of front cell mounts, to the front brace. To thin strips of CF would do it. Would still give twist flex, but reduce kickup flex..

Mine bent by 1-2mm, but I did have a few lairy moments on the straight... and it bent back with my knee easily. I would have expected it to have bent, I didn't feel any effect on the track, the car felt great!!!

[Battle_axe]

so who wants a cf tub? *ducks as flames are thrown*

[nickhudson]

already got a mint AC S2 - funnily enough i've not bent that one.....

[JustARcFan]

I'm sure there will be a nice AC chassis available in the near future

[mark christopher]

Originally Posted by daz

Its a piece of flat metal it will bend if hit hard enough! Solution is, buy a spare chassis! Or sell the car and buy a brick! I wish my real car would survived a high speed impact, but I guess BMW have not found a way of making metal that doesnt bend yet.

Bullshit, they could make it so other did not bend as easy but to help prevent you dying they create crumple zones which are designed to bend.

[mattybucks]

Originally Posted by JustARcFan

I'm sure there will be a nice AC chassis available in the near future

Who makes the standard chassis?

[JustARcFan]

AC was involved in the design of the centro but I'm not sure if they had something to do with the production.

I'm talking about a AC optional carbon chassis.

Originally Posted by mattybucks

Who makes the standard chassis?

[daz]

Originally Posted by mark christopher

Bullshit, they could make it so other did not bend as easy but to help prevent you dying they create crumple zones which are designed to bend.

Did they make crumple zones on the Titanic? Or could it be that CML have thought this through, and have built a chassis with crumple zones to protect the delicate electrics?

[andys]

I really fancy getting a Centro - but £160 for a few bits and a sheet of metal - that could bend in a crash seems a bit steep to me. I know I will only end up bending it if I run one...

It shouldn't bend - if it does / is found to bend, then as Chris has said, maybe it needs some bracing to the front or side rails to stop front to back flex ?

[cwp]

What we found out with our car as that if you over tighten the battery strap turnbuckle on the battery brace it will flex the chassie.
Just loosen it off and it will flex back.
Also you need to lift the battery post so that they sit inside the battery strap holes.

[Toyman]

The more I'm thinking about it the more I realize people that said "forget about RC gods, lets wait until it gets into the hands of "mortals" were absolutely right

[AntH]

Before I consider placing an order and bearing in mind I crash a lot these days...

losi 22 chassis is 2.5 mm in 7075 T6 circa 500 MPa proof strength. C4.1 is 5251 H22 circa 170 MPa, what is thickness of C4.1 chassis?

[nickhudson]

and the Losi 22 is formed slightly at the edges plus the side pods tie into the front bulkhead. 7075-T6 is stronger than the 6082-T6 i originally suggested (approx. 310 Mpa proof stress) but either material makes the 5251-H22 seem a little on the weak side.

i still maintain that irrespective of what the material is, some form of bracing is required - be it formed edges on the chassis or some upper bracing - it just doesn't look right at the moment IMO and you know how the old saying goes.....

[AntH]

I was comparing with the 22 as I've not heard of anyone bending one, although some say its too stiff from a handling point of view.

In the future in RC cars maybe compliance will be introduced in a more robust and controlled way as per 'real' cars, subframe or wishbone rubber bushes.... would offer scope for tuning too..

Think I will see how many slightly ham-thumbed people such as myself bend them...

[Toyman]

Originally Posted by nickhudson

7075-T6 is stronger than the 6082-T6 i originally suggested (approx. 310 Mpa proof stress) but either material makes the 5251-H22 seem a little on the weak side.

what's the cost difference between those three types?

[MHeadling]

Vega! lol

[carpenterdean]

The reason i started this thread is because i am one of the mer mortals that will crash quite alot and what i'd like to here is that there will be either an alternative or something else that can be added to the car to prevent this, after all £170plus doner car isn't cheap and i would've thought they should have given the car to a noddy like myself to test
Aswell as a pro then they could've made sure it's all gravy. I really like the car but it doesn't exactly inspire confidence.

[wezzer]

the car has been run by a " noddy" as you put it :-)
and ran with out issues !
The reason this car works so well is party because of the chassis and the way its designed , the other manufacturers that have stiffer chassis dont work quite as well .