I am having trouble finding specs for the 26HP engine. the specs say 26-30HP sometimes but quote the speeds for the 30HP or the 36HP. Almost none were built with 26hp and most had either 30HP or 36HP.The Aeronca C2 appears to fit the criteria. It's an amazingly efficient machine.
I found one spec sheet that might be at 26hp that quotes a top level speed of 75mph but the climb rate is very low. I think this is just a little heavy at 406lbs empty 700lbs gross for 26hp.