Possibly an 80cc engine with a 26" high pitch prop on an all-out 3D plane I would agree with.

If the DLE55 can turn a 26- prop with a 6 inch pitch at 6000, it would provide enough power to fly.

According to Pe Reiver's spreadsheet, it would need 4.6 HP at 6000 RPM to turn this prop.

If the DLE55 can produce this many HP at 6000 RPM, it'll work.

The plane is being successfully flown with a 3W 55 and a 24-8 prop by the manufacturer and designer, Dave Lewis at Balsa USA.

If his 3W can spin a 24-8, the DLE55 could probably spin a 26-6.