Dirty Birdy 60 (oz4915)
About this Plan
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.
Supplementary file notes
Article pages, text and pics, complete and very detailed in two parts, thanks to Rocko.
Did we get something wrong with these details about this plan (especially the datafile)?
That happens sometimes. You can help us fix it.
Add a correction
Do you have a photo you'd like to submit for this page? Then email firstname.lastname@example.org
User commentsIt should be noted the RCM plan service is not in business anymore and the canopy can be purchased through park flyer plastics http://parkflyerplastics.com/cart/index.php?main_page=product_info&cPath=46_64&products_id=608 ...I hope this will help in the search for the airplane mine came out perfectly.
Robert - 24/08/2015
Add a comment
* Credit field
The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.
This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.
© Outerzone, 2011-2019.
All content is free to download for personal use.
For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.
Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.