I have already presented the impossible case of Charlie Taylor.
see:
http://www.pprune.org/aviation-histo...ml#post8494418
This mechanic simply did not have the knowledge and experience to build an internal combustion engine, a motor that could not be found on the market in 1903.
Add to this the fact the 1903 engine has not survived. Its existence is just a claim. What is presented now as the 1903 motor is a latter alleged reconstruction of the original, same as the 1903 Flyer itself.