("Kyle Boatright" wrote)
If you look at something with a similar planform, more weight and more
wing area (an RV-6), you'll find that the CAFE foundation measured a flaps
down stall speed of 52 mph for an RV-6a, which is an indicator that a
Sonex could meet the 51 mph regulation.

http://cafefoundation.org/v2/pdf/RV-...inal%20APR.pdf


Interesting site!

http://cafefoundation.org/v2/research_aprs.php
"Aircraft Performance Reports"

(From CAFE Home page)
For over 25 years the aviation enthusiasts at the (C)omparative (A)ircraft
(F)light (E)fficiency Foundation have been carefully measuring personal
aircraft performance with innovations in flight testing. Their passion for
this stems from the thrill of working with state-of-the-art aircraft and the
geniuses who create them.


Montblack