23 Sportster oz691


23 Sportster - plan thumbnail image

23 Sportster - completed model photo

This plan was found online 23/04/2011 at: http://www.rcgroups.com/forums/showthread.php?t=1265873&page=125
Outerzone planID: oz691 | Filesize: 1806KB | Format: • PDFbitmap • PDFvector | Credit*: scaleviews.com


About this Plan

23 Sportster, a 57.5in span Ohlsson .23 powered free flight sport model circa 1949.

Quote: "If sport flying is what you're interested in, this new different free-flight plane is right down your alley. Get out your '23' and start building... the 23 Sportster was designed around the popular mass-produced Ohlsson of that displacement. It is as large, and as small, as practical. Spanning a shade under 5 feet, it is about as small as you can go and still have sport performance from a good '23'. Anything larger - and the Ohlsson will fly a ship that is plenty bigger and heavier! - would be impractical for most builders. Few people like to transport clumsy airplanes and besides materials cost a small fortune..."

Update 31/12/2016: Added article, thanks to JeffMac.

Update 24/09/2017: Added PDFvector plan tracing, thanks to hogal.

Supplementary files

Article pages.
PDFvector plan tracing.


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oz691 datafile

23 Sportster  
by Bill Winter
from Flying Models
September 1949 
58in span
Tags: IC F/F
all formers complete :)
got article :)



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User comments

Hi guys, finally flew my sportster, and thought you should have some pics [more pics 007, 008] as the plan was downloaded from your fantastic site. Thank you for making so many obscure plans available, and for all your hard work. It really is appreciated :)
Al - 01/05/2017
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* 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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