Here I have a run my daughter videoed of my Mk6 ETA29 Tethered car from the 1950's, just under 90mph...

Another run that my daughter took at Buckminster. This time my Mk1 ETA 15 2.5cc car I built in 1962, 72mph...

This is my Aircar fitted with an ETA Elite (2.5cc), propeller driven. Best run so far 88mph...