Extra 300 90 (oz10982)


Extra 300 90 (oz10982) from Carl Goldberg 1991 - plan thumbnail

About this Plan

Extra 300 90. Radio control sport-scale model for 90 power.

Discontinued kit from Carl Goldberg Models.

Quote: "If there's an aerobatic subject that can challenge the thrill of the Goldberg Ultimate, it’s this Extra 300! The Extra's generous moments, light wing loading and strong airframe make it an excellent airplane for the aerobatic pilot, whether he is learning his first maneuvers or is an unlimited class competition flyer. Yet with all its aerobatic potential, this is still a very well-behaved aircraft, making takeoffs and landings a breeze. And when it comes to engines, please note: bigger is not better. A good .60 will do an excellent job. A larger than recommended engine may overly stress your model, causing structural failure..."

The manual is available for download from the Great Planes site at http://greatplanes.com/manuals/discontinued.php

Direct submission to Outerzone.

Supplementary file notes

Kit manual, 44 pages complete.

CAD file

This plan is available for download in CAD format.


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Extra 300 90 (oz10982) from Carl Goldberg 1991 - model pic

  • (oz10982)
    Extra 300 90
    from Carl Goldberg (ref:K-55)
    68in span
    Scale IC R/C Civil
    all formers complete :)
  • Submitted: 13/03/2019
    Filesize: 626KB
    Format: • PDFvector • CADfile
    Credit*: AlanSinclair

Extra 300 90 (oz10982) from Carl Goldberg 1991 - pic 003.jpg
Extra 300 90 (oz10982) from Carl Goldberg 1991 - pic 004.jpg

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User comments

OMG I built this when i was a younger guy and been looking forever for a print. this is awesome i really cant believe i found these....I just built a cnc router. Thanks to all of you... i will send pics. Happy day in my life.
Paul - 05/05/2019
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Download File(s):
  • Extra 300 90 (oz10982)
  • Plan File Filesize: 626KB Filename: Extra_300_68in_oz10982.pdf
  • Supplement Filesize: 1506KB Filename: Extra_300_68in_oz10982_manual.pdf
  • CAD Zip Filesize: 448KB Filename: Extra_300_68in_oz10982_CAD.zip
  • help with downloads


* 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.


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