BD-4 Specifications

The following two tables are copied 'as is' from Jim Bede's book. To view performance data that have been recorded from real planes refer to TVAP site and Ken Kopp's data.

Specifications

Wing Span 25.58 feet
Wing Area 102.33 square feet
Wing Cord 48 inches
Aspect Ratio 6.40 to 1
Length Overall 21.38 feet
Height Overall 7.23 feet
Width Wings Folded 7.2 feet
Horizontal Tail Span 7.3 feet
Aileron Area 3.5 feet
Flap Area 8.0 feet
Vertical Stabilizer Area 12.0 square feet
Horizontal Tail Area 21.3 feet
Cabin Width 42 inches
Cabin Length 89 inches
Cabin Height 41 inches
Flap Span 71% of span
Fuel Capacity 51 to 80 gallons
Aileron Deflection Up 25’
Aileron Deflection Down 6’
Elevator Deflection Up 15’
Elevator Deflection Down 6’
Servo Tab Up 18’
Servo Tab Down 10’
Rudder Left & Right 25’
Flap Deflection 10’, 20’, 30’

 

Performance

Performance 2 Place 108HP 4 Place 150HP 4 Place 180HP 4 Place 200HP
Gross Weight 1600 lbs. 2000 lbs. 2000 lbs. 2000 lbs.
Empty Weight 960 lbs. 1010 lbs. 1080 lbs. 1125 lbs.
Useful Load 640 lbs. 990 lbs. 920 lbs. 875 lbs.
Wing Loading 15.15 17.59 19.06 19.06
Power Loading 14.35 12.00 10.83 10.00
Max. Speed @ Sea Level 156 172 183 203
Cruise Speed –75% power 145 165 174 192
Cruise Speed –65% power 136 155 169 180
Stall Speed Flaps Down 54 58 61 61
Stall Speed Flaps Up 58 63 65 65
Rate of Climb –Max. 900 fpm 1250 fpm 1400 fpm 1700 fpm
Take Off Run 650 ft 650 ft 600 ft 600 ft
Take Off to 50’ Obstacle 1200 ft 1100 ft 1000 ft 750 ft
Landing Roll 500 ft 600 ft 600 ft 600 ft
Maximum Range with 45 minute Reserve 900 miles 900 miles 900 miles 900 miles