Concerning internal corrosion on space frame chassis tubes, I was involved in a fatal accident investigation some years ago involving a very important car. The chassis had failed under multiple impacts due to severe internal corrosion - most notably at a multiple tube junction in the lowest plane of the frame, in which moisture might be expected to accumulate over time in inadequately controlled storage conditions, or (maybe) just over time, full stop.
That initial chassis failure had the left other parts of the frame exposed to excessive stress in further impacts which were sustained during the ongoing accident sequence. Several of those areas - also internally corroded though not to the same degree as the initial failure - separated in sequence, in a series of 'bird-beak' over-stress breakages, ending up in total separation of the frame's rear end from its front end.
The further we studied the failure, and began to understand the incident sequence, the more I became convinced that while it might be 'nice' - or even preferable - to see old cars still being raced, there is an awful lot of wisdom in hanging an old, truly historic chassis frame on the garage wall, and racing a lookalike car, assembled around a nice new full-strength replica made faithfully - one would expect - to the original design.
Of course, racers being the competitive beings that they are, a replacement frame will almost always have performance-enhancing tweakettes built in...but against the overwhelming finality of a fatality once it has happened, that undesirable reality should perhaps be accepted, and nodded through...
The regulation Taliban amongst us - to whom literal interpretation of possibly poorly-framed rules is utterly sacrosanct - will probably be enraged by any such suggestion that this may be the reality of sensible Historic racing - but when nobody of any worth will be building a young career in such a class of racing (and who the hell should really care a fig about who won some pipsqueak Historic race last weekend?) it really should be regarded as a bit of competitive fun which is, above all, absolutely not worth dying for.
Maybe this post should really be part of a different thread...though it is related to some of the alarmingly-engineered old junk previously pictured in this one. Sorry.
DCN
Edited by Doug Nye, 11 March 2018 - 20:24.