According to Wikipedia, Flyer II and III had the same max. speed, 35 mph, but for some mysterious unknown reasons Flyer III had a much poorer weight to power ratio
Aside from the Wikipedia issue...
What does this mean? What conclusions should we make, if any?
What differences, if any, arise from the different "maximum speeds" of 30, 35, 35, and 42 MPH?
What differences were there in terms of time aloft and distance flown? Were the later planes with higher power motors capable of only maintaining level controlled flight for a relatively short period of time, or lengthy sustained flight and even climbing?
Does "speed" refer to speed through the air or speed over the ground? If the latter (which is presumably the case since they weren't using pitot-based air speed indicators), how do you account for the affect of differing wind conditions on the ground speed of the different flights?
While an an engine is capable of producing maximum HP under certain conditions, how do you know if it was producing the rated HP under the engine and/or flight conditions then present?