Early test day Caldwell. Glad they are tests. Half of the exhaust was planted in a farmers field from 1500 feet. Lucky to still have a prop or sail. Redesigned the exhaust and all is well.
The Duo has a big but not inordinately so wingspan of 22 meters. At just over 600 pounds empty weight, it doesn't have to work that hard at lifting itself. With more than 1500...