challenger_II
Well-Known Member
This is a question for the flight characteristics, between the 65018 (CH-701, Savannah), and other common airfoil sections.
The reason for my request is that I am putting the pencil to a (very) light plane design, low horsepower, and decent short-field, and flying, performance.
For reference, the engine I wish to use makes 30-32hp, turning a 54x26" prop. Have flown with this engine in a Mini Max (368# empty weight), a Challenger II Long-Wing (426# empty weight, with this engine), and a Fisher FP-101 (325# empty weight). I weigh, on average, 220#.
With the above listed aircraft, performance was safe, if not spectacular. The Challenger, with that huge wing, climbed the best. Go figure!
The Mini Max had the better forward speed.
I have heard, for years, that with "ultralight" type airplanes, the airfoil isn't that critical. Some how, my Scot's blood just doesn't buy that. But, I have been wrong, before...
Now, to my original question:
Upon doing my research, I have studied what is published on the Zenair CH-701, and the rather simular Savannah. Both appear to have pretty good lifting capabilities, on relatively low horsepower, and small'ish wing areas.
I am wanting intel on the difference(s) between the 65018 (modified), and commonly used airfoils, for slow-speed lifting capabilities.
The floor is open, and thanks in advance!
The reason for my request is that I am putting the pencil to a (very) light plane design, low horsepower, and decent short-field, and flying, performance.
For reference, the engine I wish to use makes 30-32hp, turning a 54x26" prop. Have flown with this engine in a Mini Max (368# empty weight), a Challenger II Long-Wing (426# empty weight, with this engine), and a Fisher FP-101 (325# empty weight). I weigh, on average, 220#.
With the above listed aircraft, performance was safe, if not spectacular. The Challenger, with that huge wing, climbed the best. Go figure!
The Mini Max had the better forward speed.I have heard, for years, that with "ultralight" type airplanes, the airfoil isn't that critical. Some how, my Scot's blood just doesn't buy that. But, I have been wrong, before...
Now, to my original question:
Upon doing my research, I have studied what is published on the Zenair CH-701, and the rather simular Savannah. Both appear to have pretty good lifting capabilities, on relatively low horsepower, and small'ish wing areas.
I am wanting intel on the difference(s) between the 65018 (modified), and commonly used airfoils, for slow-speed lifting capabilities.
The floor is open, and thanks in advance!
