Topsy (oz1787)


Topsy (oz1787) by Norman Osbourn from Aeromodeller 1951 - plan thumbnail

About this Plan

Topsy. Wakefield model from 1951 March Aeromodeller.

Quote: "A new ruler Wakefield from Northern Ireland by Norman Osbourn... Topsy is the sixth of a series, the original was designed in 1947 with the intention of flying it in the Irish Nationals of that year. Hoewever the prototype was lost 13 mins 13 secs OOS on a test flight two weeks before the event, and the second version was hastily built in the odd fourteen days... Simple in its construction, yet incorporating features akin to the most efficient Wakefields, Topsy should appeal to many beginners in the classic event of model flying. It completely conforms tro the 1951 Wakefield rulings, and thanks to the tip-up tail dethermaliser now incorporated, promises a first-class competition performance for 1951..."

Note this plan is a 2-colour 600dpi bitmap PDF, reduced down from hogal's vector tracing. For the original hogal tracing (probably shows more detail) see supplementary file.

Update 06/11/2017: added article, thanks to RFJ.

Supplementary file notes

Previous scan version (patterned background).
PDFvector plan tracing (hogal).

CAD file

This plan is available for download in CAD format.


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Topsy (oz1787) by Norman Osbourn from Aeromodeller 1951 - model pic


Topsy (oz1787) by Norman Osbourn from Aeromodeller 1951 - pic CAD_redrawn_plan.jpg

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Download File(s):
  • Topsy (oz1787)
  • Plan File Filesize: 766KB Filename: Topsy_oz1787.pdf
  • Supplement Filesize: 451KB Filename: Topsy_oz1787_article.pdf
  • Supplement Filesize: 1814KB Filename: Topsy_oz1787_previous.pdf
  • Supplement Filesize: 175KB Filename: Topsy_oz1787_vector_hogal.pdf
  • CAD Zip Filesize: 326KB Filename:
  • help with downloads


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