Dirty Birdy 60 (oz4915)


Dirty Birdy 60 (oz4915) by Joe Bridi from RCMplans 1975 - plan thumbnail

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.


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Dirty Birdy 60 (oz4915) by Joe Bridi from RCMplans 1975 - model pic

  • (oz4915)
    Dirty Birdy 60
    by Joe Bridi
    from RCMplans (ref:602)
    June 1975 
    65in span
    IC R/C LowWing
    all formers complete :)
    got article :)
  • Submitted: 11/10/2013
    Filesize: 513KB
    Format: • PDFbitmap
    Credit*: MarkS

Dirty Birdy 60 (oz4915) by Joe Bridi from RCMplans 1975 - pic 003.jpg

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User comments

It 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
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Download File(s):
  • Dirty Birdy 60 (oz4915)
  • Plan File Filesize: 513KB Filename: Dirty_Birdy_oz4915.pdf
  • Supplement Filesize: 2612KB Filename: Dirty_Birdy_oz4915_article_1.pdf
  • Supplement Filesize: 2716KB Filename: Dirty_Birdy_oz4915_article_2.pdf
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* Credit field

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