Maybe it is time to make an abridged summary of findings and clues so far:
- The engine of the challenge aircraft is behind the cockpit.
- The challenge aircraft is from a manufacturing company started by an aviation pioneer and run by his son.
- The challenge aircraft does not look similar to the mainstream aircraft at the time, and would be easily recognizable from other angles than from front.
Added clues: the designer is a son of a Biche, but apparently not a son of a Bitch. Only one aircraft was built, but twice.