Wind Tunnel

Stall flutter is the result of the elastic axis of a wings surface being aft of the aerodynamic center, resulting in instability. A vicious cycle of lift, twist, stall and lift may ensue.

Design Process: Planform Shape

Last month we took a look at the effects of span and aspect ratio. At this point on the design of the wing, we...

Wind Tunnel

Trailing edges are more than afterthoughts.

Wind Tunnel

Stiffness.

Wind Tunnel

Gyroplanes, part 4.

Wind Tunnel

Pitch is not the only axis involved in making an airplane fly well. Yaw and roll are also important, and this month Barnaby Wainfan turns his attention to lateral/directional stability and its effect on flying qualities.

Wind Tunnel

Barnaby Wainfan looks at unconventional flight-control configurations in the cockpit and why they can throw even a seasoned pilot.

Design Process: Slots and Slats

Opening a properly shaped slot between the lower and upper surface of the wing near the leading edge can greatly increase the angle of...

In Case You Missed it

Channel Challenger

Dick Starks and the Dawn Patrol get a front-row seat to the Bleriot XI replica’s very successful first flight. Next comes flying off the 40 in preparation for its English Channel flight.

Engine Theory: Oil System Design

Exploring the components that keep your engine alive.

Rotaxs 915 iS is Ready to Roll

It's got a great power-to-weight ratio, but also a complex installation procedure. Don't be surprised if it inspires a new design or two.

Letters

Fenced Goods (Best Letter) Thank you, Dave Martin, for...