DClarkson1 27/09 This is the aircraft I was thinking about I believe there was an article about in Pilot/Flyer some years ago. Working on the figure if I am correct with full tank, 160usg = approx. 1000lbs it then becomes almost a pilot only aircraft, good for ferrying reduce fuel to 800nm range and it becomes a good for 4 seat aircraft. Many of the aircraft mention are only 2 to 3 seats at max range which may be down to 500nm and their cruise speeds are in the 120/130kt range. So if you want 4 seats some baggage 150kt and 800nm it takes at least 250hp if not, 300hp I don't think if can done on 200hp. The biggest Robin can lift over it's own weight but is wood and fabric and down in the 120/30kt range, so a comprise may be needed in one of the requirements.