RE: Suggestion on Engine for MK Skystar 90
Yup, have finally solved the pipe length on the Webra andusing an OS F plug it pulls the SkyStar like a rocket. A Hanno 61 would be just as good, mine weighs just 3250 grams ready to fly and I could save 100 grams on the header if I could fit an aluminum one like the OS Hanno has.
A 91 surpass with pump would be perfect too if you don't want to go with YS.