What became of the rotary valve?
recently enjoyed a visit to Cross Manufacturing in Bath, where I toured the private museum and learned the company’s history from chairman Rodney Cross and former production manager Cyril James. Now, readers with an interest in automotive engineering history may well know that in pre-Second World war days, the Cross rotary valve was rated the ‘next big thing.’ But they might not realise that – unlike other apparent breakthroughs that subsequently disappeared without trace – its fate was sealed by circumstance,
