Quote from blog:
"Eventually I jumped in the back cockpit and checked it out. 53.92 knots and a 50.05 500 meter average (54.4 on the processing and 50 even for the 500). It quickly dawned on me what had just happened."
Great read Andrew. Must follow their progress. 
Interesting to read the comment that they are expecting another 5-8 knots... above 54kn... That is a big ask.
