Eastwind 100 (oz9024)
About this Plan
Eastwind 100 - Radio control powered sailplane, with retracting power pod.
Quote: "Eastwind is a multi-role soaring machine, presenting a variety of flight modes for lasting interest in the ship. The basic aircraft can be adapted for tow-line launch or self launch engine power, ridge soaring or flat land thermal hunting, as well as radio directed free-flight endurance. With inexpensive two channel radio gear, a number of control options are available, the standard rudder and elevator for minimal installation effort, or inboard ailerons instead of rudder for ultra responsive turn control. An auxiliary control for engine cut-off is also shown, to enable the pilot to discontinue powered flight upon connecting with a strong thermal, by briefly applying down elevator.
The design is based on the premise that flying days are windy! As a sailplane, the only power available for speed is gravity, and therefore a higher wing loading was selected at the expense of greater sinking speed. The same aircraft will glide at the same angle, even if the weight is doubled. Under these conditions the gliding speed will be increased approximately 1.4 times and the sinking speed 1.4 times. The only way to increase the speed of a glider is to dive, and if the wind is strong, a light glider can still lose ground as the angle will be so steep, little relative gain toward the field is accomplished. Weight and low drag are the requisites for a wind penetrating glide. Thermals in wind are frequently strong and low sinking speed is not of first concern, but the ability to soar downwind and return is vital.
The construction of the Eastwind is conventional all balsa with spruce wing spars. This produces a flexible and repairable ship of simple construction. After much consideration, the two piece wire shaft mounted wing design was adopted. High loads during hi-start or winch launching are relieved by the flexibility of the wing attachments. A convenient area for retracting the engine pylon is also made available, with the not inconsiderable added benefit of less bulk for transportation to the flying site.
Before beginning construction, study the plans carefully to become familiar with the structure and parts..."
Note this plan includes includes hand-traced kit parts.
Steve, copy of Jetco Eastwind 100 plans: 100 inch glider with retractable power pod. Thanks for all your efforts with Outerzone. It is a great resource. Jim
Direct submission to Outerzone.
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User commentsI downloaded the plans for the Eastwind 100 but the parts that were traced on (that would be the ribs etc) were not accurate and the ribs and spars were shifting about when I tried to fit everything together. Would anyone have a copy of the original plans so I can get the accurate measurements. I really like this model.
jetjan - 16/06/2019
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