tbienz,
That reminds me of flying my Aeronca 7AC "Champ" from Minden, NV to Napa, CA. Had a hand propped 65 hp, with wooden paddle out front. On a good day it'd do a barely honest 85 mph, but not more without help from Ma Nature (and that's rare it seems). The only things I ever caught in the air were the Goodyear Blimp, and once I almost caught up with an AN2 (but he might have been going slow on purpose in the pattern).
Once over S. Lake Tahoe heading west, GPS showed a ground speed of 13 mph, almost as fast as a bicycle and faster than most baby strollers! I had full fuel (13 gallons) but could never have made Napa , CA without re-fueling at that rate. However, I knew once I cleared the western flank of the Sierra I could start down, and beyond the foothills I'd be able to drop down to fence post level if need be - - and that worked!