RE: HERE INFOS ABOUT OS 75 AX
Dave, I don't own a 75AX. What would I put it in? I'm about to be buried by .40 sized profiles here...all of which have their own engines.
I suppose if "Max RPM" with a smallish prop were the only consideration....the doors would be wide open for a whole lot of engines to jump in, and eat the AXs lunch. I don't believe the 75 was ever intended to be a speed champ through the radar traps.
(I do own a 55AX, and it may be no speed demon either, but it is the CAT'S ***** where 3D work is concerned!)
The AX series as a whole however, has been rather successful. What these engines bring to the table is a very broad range of USABLE power settings. Not just ON & OFF. They require no modifications...no special considerations. Just fuel, set the needles semi-close, and you're going to have a good day. That's a big deal in a market full of one trick pony engines.
Why should the .75AX be anything but a continuation of that success?
Take from it what you will.