The Bert BF-4 N62F single-seat biplane was the fourth design of Floyd Bert. It took a year to construct at a cost of about $3500.
The wings are wood with Ceconite cover, and ailerons, on the lower wings only, are aluminium and fabric. The fuselage and tail are steel tube and fabric.
The engine is fitted with an inverted fuel system.
Engine: Lycoming O-320-A1A
Wingspan: 14 ft / 4.3 m
Length: 15 ft / 4.6 m
Empty weight: 660 lb / 299.4 kg
Gross weight: 1000 lb / 453.6 kg
Cruise: 140 mph / 225 kph
Landing speed: 60 mph / 96.6 kph
ROC: 3200 fpm / 16.26 m/sec
Endurance: 2 hr 30 min
All Aero 