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Barnaby Wainfan

Barnaby Wainfan
Barnaby is a Technical Fellow for Northrop Grumman’s Advanced Design organization. A private pilot with single-engine and glider ratings, Barnaby has been involved in the design of unconventional airplanes including canards, joined wings, flying wings and some too strange to fall into any known category.

Thrust Line Effects

The propeller of an airplane generates thrust that drives it through the air. In addition to propelling the airplane, the thrust of the propeller...

Propeller Effects–Lateral Directional

The propeller slipstream affects the aerodynamics of the airplane. A propeller accelerates air backward and also imparts a swirl. The air in the slipstream...

Design Process: Slipstream Effects

In preliminary design and for performance calculations, we treat the engine, propeller and airframe as separate entities. The only engine effect we typically consider...

Design Process: Engine Size

The engine of an airplane must produce enough power to meet the requirements of all phases of the mission. First, the engine must accelerate the...

Design Process: Strakes and Ventral Fins

On some airplanes, the basic empennage does not provide acceptable flying qualities in all flight regimes. Supplemental surfaces to augment directional stability, improve high...

H-tails and Triple Tails

The majority of airplanes use the conventional tail configuration with a single, centrally mounted vertical tail and rudder. Sometimes, however, the vertical tail is...

Design Process: T-Tails

A T-tail is a configuration where the horizontal tail is mounted on top of the vertical tail rather than directly to the fuselage. T-tails...

Design Process: V-Tails

A V-tail is a configuration where the horizontal stabilizer and vertical fin are replaced by a pair of surfaces mounted at a high dihedral...

Design Process: Vertical Tail Spin Considerations

Not every airplane is designed to perform intentional spins, but that doesn’t mean the designer can safely ignore the effect of the vertical tail...

Design Evolution on Display

In the antique/classics parking at AirVenture this year we found a replica of Benny Howard's Mr. Mulligan parked between a pair of Howard DGA-15s....

In Case You Missed it

Wind Tunnel

VTOL flight modes.

Ask the DAR

Inactive homebuilts from the 1970s, confusion about changing from SLSA to ELSA.


Builders share their successes.

A HOG in Time Takes…Forever

As I told you a couple of months ago, “In theory, there is no...