N661H

This HP-11, serial number 67 is one of the "Chicago Five" fist owned by Dr John H Wawirka.

I do not know the complete history of ownership; however, in 1991 Chris Marchant purchased it in run down condition and decided to do a complete overhaul. It was completely deasembled, parts were cleaned and, if required, painted.

After 100+ hours restoration effort the project was purchased by Mark Nelson. Mark has also put more then 100 hours of sestoration effort into this sailplane. The final result is an HP-11 in excelent condition with modern instrumentation.


New Tinted Canopy


The instruments consists of an Airspeed Indicator, Altimeter, VAI-700 Vertical Card Compass, Winter Mechanical Variometer, and Cambridge 302 Electric Variometer / Flight Recorder. The Cambridge provides GPS and 302 derived flight data to an iPAQ hx 4700 PDA (not shown in photos.) The radio is a Becker AR4201 with a boom mike and speaker. (Notice the nice map pocket on the right side of the cockpit below the boom-mike.) The push-to-talk switch is mounted on the control stick.

This is the first time I've see a bicycle sprocket used as a flap crank lock. It is simple, light weight and effective. The use of foot pegs as ruddervator peddles is another unique item found on this HP-11. The hydraulic brake actuator can be seen on the control stick.


The trailer is designed to store/transport a Schreder sailplane with the V-tail extended.
The assembly process starts with removing fuselage from the trailer placing the "V" tail in the fuselage support stand. The wings are rolled out to the appropriate side of the fuselage on the wing dolly. Once the wings are mounted on fuselage the only controls that need connected are the ailerons. (The aileron connection and the flap drive linkage can be seen in the last picture.)


The above series of pictures show fuselage and tail dollies; tail stand use to raise the tail when the glider is tied down; fuselage stabilization stand; wing stands with rollers used during assembly; and, mooring anchors.