Chris Wells wrote:
Now that they're going to start enforcing the weight limit on Part 103,
and since the Rotax 277 is no longer made, isn't it about time for a
new engine/ultralight design?

We've got carbon fiber to build a lighter plane, and I'm sure
technology has advanced enough to build a lightweight 4-stroke engine,
or at least a reliable 2-stroke. I know they're talking about relaxing
the rules, or at least allowing safety items like brakes and electric
starters to be exempt from the limit (like they did with chutes) but
does anyone have anything new on the drawing board?

Yes. It's called a Subaru.