Bryton Roc (oz3524)


Bryton Roc (oz3524) by FH Boxall 1950 - plan thumbnail

About this Plan

Bryton Roc. Wakefield contest model. From Model Aircraft, January 1950.

Quote: "Holder of British Outdoor Rubber and Wakefield Class Records. Bryton Roc, by FH Boxall.

THIS model will not appeal to the flyer who builds his models by the score. There is a fair amount of weak in its construction, and careful building will pay dividends on the flying field. After the results of the Fairlop Trials, and of the Wakefield proper, it might well be argued - why go to all the bother of a fully streamlined job when simple slabskiers are winning? Quite so, and it is not for me to say whether the simple slabsider, or the pure 'streamliner' is the best for everyday flying. Many of the experts have written plenty on this subject, and I will leave this touchy subject to them.

The design of this modelwas based largely on extensive flying with my 1941 design over a period of years. I have used single-blade folders on this old machine, but have decided in favour of large free-wheelers from now on; my aims were like all Wakefield designers to get a good power weight ratio, a design that would be stable in all weathers, and freedom from structural failures.

The deep fuselage is descendent from my '41 machine, and is used for the same purpose to counteract the torque of a 19 in propeller, and to dampen the roll in the glide which results from a large free-wheeler. The high aspect ratio is used to improve the glide on the necessarily high wing loading, and to obtain span, the main correcting force against torque.

Building: For anyone who has built any form of streamlined model this should present no trouble. The fuselage is, of course, the longest task. I used a 1/2 in square obechi jig ihrough the centre of my card templates, but any similar size rigid spar will do.

Pin temporary balsa sheets, cut to the width of the former spacings, to the jig to act as bracings, until the four longerons are set; these bracing sheets can then be removed and the wing fairings added; finally all the stringers..."

Update 18/04/2019: Replaced this plan with a clearer copy, thanks to DBHL, theshadow.

Scan from DBHL, cleanup by theshadow.

ref DBHL-5501.

Direct submission to Outerzone.

Supplementary file notes

Previous scan version.


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