Herron's Gyro Recalls Yesteryear's Rotorcraft Configuration

It is currently one of sport aviation's most intriguing sport rotorcraft designs... but it is based on historic airframes that more than proved their mettle during aviation's earlier generations. Ron Herron's plansbuilt Little Wing Autogyro is a tractor design which brings back a vintage look with its tubeandfabric fuselage and Rotec radial engine (though other engine selections may be adapted). More than just esthetically pleasing, the machine has distinguished itself worldwide as the holder of 29 World Records under the pilotage of rotornaut Andy Keech.

Fifteen years in the making, the latest version of the Little Wing autogyro is the fifth in a series of tractor configurations that mimic the designs of old like Pitcairn, Kellett, and Juan de la Cierva. The first machine, the LW1, was powered by an 0200 engine while four other designs (single and twoplace) have since been developed to get to today's LW5. One of the main reasons for Herron's efforts was to bring enhanced pitch stability to today's sport rotorcraft... something of an issue in a number of other designs. Herron notes that this configuration offers increased pitch stability to the point where pilot induced oscillation (PIO) is virtually eliminated and powerpushover (PPO) is impossible. Herron credits the fact that these aircraft incorporate large horizontal tail surfaces located well aft of the rotor thrustline while the propeller thrustline passes through the loaded center of gravity of the entire machine as well as the center of fuselage parasitic drag. Thus, there is no undue pitching moment created by engine thrust or fuselage drag at any speed or power setting.

Other design attributes offered by Herron's Little Wing designs (as compared to the generic pusher designs that started with the original Bensen gyrocopter) include better crash survivability, better engine cooling, increased propeller efficiency and decreased noise levels, eliminates potential propeller/rotor damage, greater utility, and classic looks. Available in plans form, the aircraft's more difficult to assemble components (like a prewelded fuselage) are available directly from Herron.

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