About this Plan
Zeus. Towline glider model. An 82 in span sailplane. Wing area 310 sq in.
Quote: "Chapter X: Zeus, a 27.7:1 Aspect Ratio Sailplane.
This machine should only be attempted by the experienced model builder, for considerable patience and care is required to ensure a really good job. The wing construction must be dead true as any slight inaccuracies over so large a span will invariably lead to poor flights.
A very deep section is employed at the roots and this allows adequate spar sizes for wing fixing. The section tapers towards the tips for stability purposes and also to allow the main wing weight to be concentrated near the centre.
A polyhedral wing is employed and a dihedralled tailplane with twin fins, so that the tailplane is always clear of the ground and never has to support the weight of the model. Since the wing is the most important part of the model we will deal with it first.
Wings. Templates are made from 1/16 in ply of the root and tip ribs and each set of ribs for one half wing cut at the same time. The first four wing ribs, 1, 2, 3 and 4, are of 1/16 sheet whilst the remainder are 1/4 in sheet. The first four ribs are slotted to take the wing boxes. The remainder may be cut out to lighten and, in addition towards the tips, a lighter grade of balsa should be used.
The wing is built up in the normal way on the plans. Each wing half may be built as one unit if desired and the dihedral angle put in later or in two separate halves and then cemented together at the correct angle. Whichever method is used the wing must be built on a perfectly flat board to ensure trueness.
The tips, of 3/16 balsa outlined with 1/16 birch sanded down, should be fitted at this stage, also the wing boxes securely cemented in and the plywood webs added to the mainspar at the dihedral joints. The sheet covering may then be added using two pieces of 1/32 sheet for each wing half..."
Scan from DBHL, cleanup by theshadow.
Direct submission to Outerzone.
Update 26/08/2018: added chapter from the book "Model Gliders" by Ron Warring, 1942, thanks to RFJ.
Supplementary file notes
Article - chapter X from the book.
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User commentsFrom the book "Model Gliders" 1943 R.H. Warring
Pit - 19/08/2018
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