Sunspot oz7318


Sunspot - plan thumbnail image

Sunspot - completed model photo

Submitted to Outerzone: 18/12/2015
Outerzone planID: oz7318 | Filesize: 1043KB | Format: • PDFbitmap | Credit*: Starfighter


About this Plan

Sunspot - Free flight towline glider.

Quote:- "A high performance sailplane designed by Roy Yeabsley, described by Bill Dean. Outsize in gliders and one of the most consistent performers amongst the 1946 British designs, is Roy Yeabsley's ten foot Sunspot. You can build it in just over a week and the total outlay is only a fraction of that needed for a petrol model. The ultra light wing loading (weight is only 2-3/4 Ib) rules out major crackups due to high speed contact with cars and other obstacles on the deck. Exceptional stability enables you to keep flying when other jobs are grounded by rough weather. As for performance - the model has practically been all over the country on a solo goodwill trip! Best official flight at time of writing is 20 : 10 on a cloudless day - the model disappearing out of sight overhead dead above the launching point. On a 300 foot towline, consistent non-thermal flights of three minutes are turned in every time. A dethermaliser is essential for this design. One of the parachute variety is used on the original model and is released by means of a slow burning fuse instead of the usual timer."

Direct submission to Outerzone.

Supplementary files

Article pages, text and pics, thanks to Algy2.


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oz7318 datafile

by Roy Yeabsley
from Aeromodeller
February 1948 
121in span
Tags: Glider F/F
all formers complete :)
got article :)


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* Credit field

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