Dirty Birdy 60. Classic pattern plane.
Quote: "The Dirty Birdy is a new pattern ship by Joe Bridi whose Sun Fly (oz3946) series and Kaos (oz6251) pattern aircraft have become almost legendary in competition circles. All-up weight, including retracts, ranges from 7-3/4 to 8-1/2 lbs and, with a wing area of 688 sq in, this new ship has been expressly designed for the current AMA and FAI Patterns.
Since the first flights of the prototype, the Dirty Birdy has proven itself to be a superb pattern ship. The design makes it a gentle and rock steady flier with absolutely no snap roll tendencies. Even though the clean design makes a ship that moves out well in the air (from 80 to 100 mph), the landings are as slow as you'll want them to be. 2 degrees of down thrust is used on the engine with no right or left thrust required. Response to the use of the control surfaces is extremely smooth. A minimum of surface deflection is all that is necessary for it to perform to absolute perfection. As a result, the plane is a very predictable and reliable ship that you will really enjoy on those Sunday morning flying sessions or at contest time.
Since most construction articles presented in model aviation magazines are necessarily short due to space limitation in each publication, we have asked RCM's Contributing Editor, Ben Strasser, to present a complete step-by-step construction article with full material list in order that you may build the Dirty Birdy in the shortest possible time and with as complete a set of instructions as is possible to present. For this reason, this article is divided into two parts. The conclusion will appear in the July 1975 issue of RC Modeler Magazine.
In this first segment, you can assemble the materials while waiting for your set of plans to arrive from the RCM plans department. The canopy is available from the RCM Products Division and, when your plans arrive, you can proceed with Ben's instructions to cut out a complete 'kit' for yourself with the full construction of the aircraft appearing in the conclusion of this two part series..."
Direct submission to Outerzone.
Article pages, text and pics, complete and very detailed in two parts, thanks to Rocko.
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