Tall Boy (oz9063)

About this Plan

Tall Boy. Indoor rubber model, to Manhattan rules.

Quote: "When it was decided to include the 'Manhattan Formula' class of model in our Indoor Calendar, it gave the rubber enthusiast an ideal opportunity to build a contest scale-like type model, capable of fitting the largish gap between the Easy B and Micro film duration stick models and the far heavier but very realistic Peanut scale miniatures.

The Formula rules make for a fairly well proportional model, complete with the goodies, such as a glazed cabin, func-tional landing gear, plus the ability to take-off comfortably and still produce a favourable flying time.

Even if the rules inevitably lead to class similarities in shape and size, I feel one can still sport an individual looking model, merely with colourful tissue trims etc, yet still remain close to the 4 gram minimum. Although, even attired in plain condenser paper, a Manhattan always looks great as it circles way overhead in its own sedate way.

As in all indoor flying, one has to be weight conscious right from the begin-ning, the wood sizes shown are suitable if good light balsa is used, such as 4-1/2 - 5 lb stock, if heavier strips have to be substituted, try reducing the sizes wherever possible, for example 1/16 sq to around 1/64 sq size. Of course lightweight scales are really essential in sorting out ones strip wood for models such as this. Supplies of indoor quality balsa, rubber and other accessories are available from Micro-X Indoor Supplies, 4 Hastings Close, Bray, Berks, send 10p for current price list.

To construct, the fuselage is best considered as two separate assemblies, as the rear section boom is best dealt with sepa-rately, being made up as light, and conse-quently, as thin as possible.

Build the two main side frames together, over the plan with their vertical and diagonal members, as far back as the motor peg location. When these are dry, separate, and form a box-like structure by cementing in place the upper and lower cross members (the upper cross member adjacent to the windshield, needs to have two small holes part-drilled in its under-side before cementing in place), check for squareness and draw together evenly the front and rear ends of this frame; cement in nose former F1, when dry, add the other two formers, F2 and F3 together with the three frontal stringers, fill in around nose area with light 1/32 sheet let in flush between stringers and longerons; fit wind-shield.

The tail boom section is built similar, but take extra care as it is quite flimsy, although when covered later, it will stiffen adequately for flight loads. Assemble the two fuselage sections together, on the building board, use small weights, packings etc to ensure correct alignment whilst the cement dries, add the small gussets for additional strength. Split bamboo sanded into a near oval section, is used for the U/C legs..."

Scan from DBHL, cleanup by theshadow.

ref DBHL-6213.

Direct submission to Outerzone.

Update 14/08/2017: added article, thanks to Pit.

Supplementary file notes

Article.

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