QAVION
Many thanks. I'd just about come to that conclusion but it's nice to have confirmation. Sorry to be a pain, but do you have any info on what ACTUALLY happens to the ignitors when they are selected on/automatically on for flaps/icing etc? As I understand it, the internal pressures are too high to allow actual spark production until there is a flame-out - then they start to work properly. Do you know if this is correct?
Thanks in advance.