@RobertL18C I decline any responsibility 
This is what I get…
The links work here too.
The Harmon link works for me ?? Both “rockets” are RV 4/8 with a larger engine. The F-1 also has a modified (tapered) wing, which makes it better looking, not sure about better performance. They are light airplanes with large engines, just like the -4/8, only slightly heavier and much more power. I don’t see what should be off with the Vs. The original stall speed of the -4 is 48, while the -8 is 51.
On the subject of high performance experimentals….
LeSving the Harmon link doesn’t appear to work – how many F-1s have been built? Simple, 200 KTAS+, aerobatic – looks very attractive. The Vs of 54 mph seems perhaps sourced from the marketing department.
It’s an experimental. There is no limit in MTOW or ceiling or Vne, unless the builder set it. Depending on how well you build, you may not even reach the “stated” Vne due to a multitude of reasons (flutter usually). Ceiling is whatever alt you actually have tested your airplane at.
Besides, the F-1 rocket or the Harmon rocket are much better plane in all respects IMO. RV’s on steroids.
Peter wrote:
But it may be possible to go VFR above that I think we did that recently… no enroute VFR allowed in the FL200+ Class C AFAIK, unless this has recently changed. For sure you can do VFR above FL600 which is Class G.
Well, according to both the International Rules of the Air and SERA you need special authorisation for VFR from FL200 up, regardless of airspace class. Enroute or not doesn’t matter. So you can’t just cancel IFR when flying above FL600.
SR22 has a ceiling of FL250.
Some procedures change from 17’000 ft and above, e.g. Vne lowers, and you may not reduce MP below 18.5 in (or so, this is from memory).
