For a long time I could not decide between A60S/L or AXI 5325/24 and 5330/F3A. That motor in my case would not be primarily used in a F3A plane but on H9 Extra 260 27%. At the same time I wanted a motor that I can use as a spare if needed for my 2x2 F3A one day.
The 2 motors from Hacker I was considering were A60 22S or 16M, both kV 215. Well even thou 16M in calc programs was much better than 22S on 10S and 20x13 prop (10A less and 300rpm more) the weight (160g more)of 16M has put me away from it, not so much because of Extra but as a possible replacement on F3A plane. At the same time what worried me a bit about 22S is that suggested prop by Hacker is 18x12 on 10S while at the same time AXI 5325/24 even slightly lower weight and kV235 is suggested for 19x12. Knowing that Hacker and AXI are almost identically conservative about their motors this raised a question mark. Also some tests of 5325/24 with good packs and 19x12 showed that it is absolutely OK even on a heavy (5,5kg) planes.
In the end I took AXI 5330/F3A because it was in between A60S and A60L with weight (575g), can carry 20x13 on 10S without any problem even on a hot summer day, and has enough power for windy days. 80g more compared to 5325/24 are a minus but the extra grunt on my heavy Extra will help. Also 22S would be really pushed too hard on Extra.
It took me 3 months to make this decision
and I still have not answered your question, hopefully it will take less time
.
If you plan purchasing some of the latest F3A designs that have been designed exclusively for E power (hence very light) and you
know that your total weight will be not more than 4,7kg and you really want to go with Hacker outrunner than 22S on 10S with 20x13 would be the right choice. If your total weight is going to be closer to 5kg mark than the power of 22S will not be enough and 16M would be to heavy.
That is why there are not many A60 motors used in F3A, I was also wondering why, but now I know why, they are either to weak or too heavy. I think that Hacker will have to revise their 16S design because it only makes sense on super light F3A birds and if someone insists to have a Hacker outrunner.
Last but not least; we should not forget that marketing guys have very often their fingers in a product range. How many people would really want to buy (expensive) C50 series motor if there would be a competitive A60? My guess is much less than today
!