[Al (astral highway)]

Hi folks, thank you for the replies so far. Thank you Hugo, you’ve provided a lot to digest and investigate here. I’ll comment on your very full and useful post ,once I’ve followed up the links and ideas. It will probably be later this week.

Just to emphasise Kalee20 and MotorbikeLes,, I took a high-resolution photo and it is just compressed here. There is no doubt from the very clear lettering on the actual motor that it is indeed 1 phase.

There is no urgency with this project , but I’ve kept the fan as an object of beauty for some years and I am keen to give it a spin (excuse the pun) as it is exquisitely engineered and probably sounds like a small turbofan! It may be integrated into my ongoing major project , although overkill in terms of the huge forced air flow it undoubtedly provides!