There is a formula going around, scarily accurate it is too, which is something like
#hrs = age/2
Or maybe I am getting it confused with the total time to get a PPL - (age/2)+30 would be about right.
I went solo in about 15hrs I think.
It's utterly meaningless because so much depends not only on aptitude but also how well you click with your instructor. This all happens at a time when the student is very green and would not spot a bad instructor from a good one, so not like to do something about it e.g. change schools. I have met at least two PPLs students who were to 100hrs and not went solo, which shows what is possible.
The preoccupation with "going solo" is counterproductive. In the USA it has been shown that one can turn out perfectly good PPL/IR pilots with about 50-70hrs of
all-dual scenario based flight training. But aviation is full of ancient elitist practices and proving that you can "go solo" is one of them. You may as well be required to wear a leather apron and bare the left part of your chest while swearing the Masonic oath to never bust controlled airspace
