EAA Airventure Museum

Waco YKS-7 Specifications

As delivered in 1937:

Length Overall:

25 ft. 3 in.

Height Overall:

8 ft. 6 in.

Wingspan (upper):

33 ft. 3 in.

Wingspan (lower):

28 ft. 3 in.

Wing Chord (both):

4 ft. 9 in.

Wing Area (upper):

130 sq. ft.

Wing Area (lower):

110 sq. ft.

Gross Weight:

3,250 lbs.

Empty Weight:

1,882 lbs.

Useful Load:

1,368 lbs.

Payload w/70 gal. Fuel:

740 lbs.

Engine:

Jacobs L-4, 7-cylinder radial, rated at 225 hp at 2,000 rpm at sea level

Fuel Capacity:

70 gal.

Oil Capacity:

5 gal.

Cruising Range (2,000 rpm at 6,000 ft. at 15 gph):

590 miles

Service Ceiling:

15,000 ft.

Landing Speed (with optional flaps):

50 mph

With Hartzell Wood Propeller:

Maximum Speed:

146 mph

Cruise Speed (sl.):

130 mph

With Curtiss-Reed Metal Propeller:

Maximum Speed:

150 mph

Cruise Speed (6,000 ft.):

140 mph