Wow - not
No doubt a fun project to be involved in, but 80mph?? What sort of test is that? Pretty much every single car on the road can do that speed easily and above all safely (if they were on a race track). A large number will also do 126mph – it is nothing special. The speed record for a human powered bicycle is 81 MPH for gods sake. Apart from the simple joy or building a vehicle and divining in it, where is the challenge? It’s got a high tech LPG powered engine, with the slight difficulty that the power is transmitted through steam. If you are going to spend all that time and money, surly you can beat the guy on a bike on your first test run?