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Hmmm Ridgard seats eh!
Appendix K allows period seats in both Period F and G. I have never been convinced that the Ridgard type seat was available pre 1966, but my Mini Cooper sure had one fitted by 1971. So I think they are a Period G seat.
What I don't understand is how you can run the seat in Period G but not Period F. Appendix K needs to be amended such that all these sorts of stipulations are retrospective IMHO.
Further as I understand it the seat testing is done only in modern cars , all of which have the contemporary crush structures-thus the seat is required to be a non crush item within a crush structure. By their own confession FIA are unable to devise a test for a ''crushable' seat in a non crush structure like a Mustang or a Mini, thus it seems in the event of an accident with an FIA seat there is the danger that the impact goes all the way through to the sitters pelvis which is the final crushable structure.
Maybe the FIA have this wrong.
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