Head restraint rule calrification

[nicks94tbirdsc]

In the rules it lists using ensolite or ethafoam for the padding. It also says that the material should be NON-resilient, however, the product manufacturer for either product lists the product as resilient. Im wondering if there is a typo in the rules or web pages, or if there is a specific model of the foam they are referring to. TIA

[nicks94tbirdsc]

In the rules it lists using ensolite or ethafoam for the padding. It also says that the material should be NON-resilient, however, the product manufacturer for either product lists the product as resilient. Im wondering if there is a typo in the rules or web pages, or if there is a specific model of the foam they are referring to. TIA

[karsten]

we got fia-certified roll-cage-foam last week. this foam is surprisingly hard,
it is much harder than we expected. iam not a native english-speaker, but i
think resilient means soft,elastic in this context. in case of a crash the
padding has to be hard (much harder than tubing insulation material) and
energy absorbing. otherwise the head would compress the padding to fast without
any energy-absorbation and decelateration. the padding is made to avoid
deadly acceleration of the head and not to avoid blue and black marks.

[nicks94tbirdsc]

Thanks thats what I figured as well. What foams do people use for the head restraint material that are non-resiliant?

[Rob Davies]

WE use EAR Specialty composites Confor foam. Apprently it is velocity sensitive and used in F1 but other than that have no clue if it passes the rules.

[Greg H]

We just stuck with actual "roll-bar padding". The judges wanted to see that it was SFI certified. It seems really hard, but that's what they want I guess.

[nicks94tbirdsc]

Thanks for the help, I know the actual roll bar padding needs to be SFI certified, But I am still unclear about the actual head restraint foam. You would think they would actually clarify this more in the rules since it is a safety device. Its also odd that no one really seems to have a clue what is really acceptable. I called DOW today to ask about their ethafoam and they said none of their products meet the rule requirements. I guess Ill just select a less resilient foam and hope we dont get nailed.

If anyone can help calrify this it would be greatly appreciated.