Back again... and this time the title is pretty apt....
So I'm running on wing tanks (plenty of fuel in them - around 25 L) straight and level on a very hot day (90 degrees) and I get what appears to be fuel starvation, surging and power loss and nearly an engine stoppage (it felt like that).
Had already done 30 mins of a sortie and aeros on a mix of front and wings with no issue. When I lost power, i had been on wings for a good 5 to 10 mins, power set at 24/25 leaned and straight and level no yaw...
back onto front and pump and after a bit of surging and fluffing all was good, but damn it got my attention.
On landing there was plenty of fuel in the wing tanks and it fed on the ground run from them.
So a question, has anyone heard of vapour lock from the wing tank feed during extreme temps?