RE: Excelleron 90...WHAT ENGINE!?!?!
Another option is the Saito 1.25 .
I've just put a Saito 1.25 on my Excelleron which flew with a YS 1.10 last year and I'm
pretty impressed with it. It starts easily, idles very good, and has more than enough power.
It's nowhere near being broken in yet but it seems to have as much vertical pull as the YS .
tommy s