Details from an actual aircraft. Performance in Flight Simulator may vary.

Take-off Run: 600-800 ft. (Note 1) 
Minimum Level Flying Speed: 8-9 mph 
Best Climb Airspeed: 35 mph 
Cruise Airspeed: 45-50 mph 
Maximum Level Flight Airspeed: 60 mph 
Vne: not specified (Note 2) 
Maximum Rate-of-climb: 750 fpm (Note 3) 
Service Ceiling: not specified (Note 4) 
Flight Duration: 60 min (10 min. reserve) 
Flight Range: 45-50 miles (no wind, 10 min. reserve) 

Note 1: Full load, no wind, no prerotator, grass surface. With the model engine prerotator, takeoff distance ranges from 300-400 feet (no wind). 

Note 2: The aircraft has reached speeds of 75 mph in steep descents with no adverse handling. Since it is very difficult to fly it any faster, and assuming a 30 mph gust- loading factor, it does not seem that there is a meaningful Vne for this aircraft. 

Note 3: Full-throttle (6350 rpm) with a standard (170 pound pilot under standard, sea-level conditions). Under typical conditions (hot, humid weather, at higher elevations and pilot weights in the 200-220 pound range, sustained rates of climb will average about 350-400 fpm. 

Note 4: The aircraft has been flown past 6000 ft. MSL and still demonstrated satisfactory climb performance. The maximum service ceiling would appear to be about 7000 MSL and is limited by the Part 103 5-gallon fuel maximum. 


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Airframe Specifications
Empty Weight: 250 pounds (Note 1) 
Useful Load: 250 pounds (Note 2) 
Blades: Rotordyne, 7 3/8 in. chord (Note 3) 
Rotor Diameter: 25 ft. 
Height: 8 ft. 0 in. 
Width: 7 ft. 8 in. 
Length: 12 ft. 0 in. 
Fuel Capacity: 5 gallons 
Engine: Rotax 447 (40 hp.) 
Gearbox: 2.58:1 
Prop: 60-38 2-blade wood (Note 4) 

Note 1: weight includes the Rotordyne blades and an ultralight-style instrument pod but no brakes or prerotator. With equivalent Brock or Dragon Wings blades the airframe weight will be about 225-230 pounds, permitting the addition of a prerotator.

Note 2: Assumes a 35-pound fuel load and a 215 pound pilot. Greater pilot weights can be accommodated, as noted later.

Note 3: The aircraft has been flown and performs well on both Brock and Dragon Wings blades.

Note 4: The aircraft flies well on a two-blade, 60 inch IVO Prop set to 14 degrees pitch. This is a very smooth prop and more durable than the wood version, although we think the "woodie" may be just a bit better.

