Bowden Contest - Free flight gas model. This is a low resolution scan.
Quote: "I imagine that there are many people who have been building rubber models in the past but who will be thinking of trying their hand at petrol models now that engines and coils will soon be with us again. These people are mainly experienced or fairly experienced builders, but are in need of a little guidance over petrol matters, and want a foolproof design to commence with. Here then, I can safely say, is the answer.
I have called the model the 'Bowden Contest' because I hope it may lead a number of people to have a crack at the 'Bowden International Petrol Trophy' and the other major petrol competitions next year. If the reader will build the model accurately, trim it as instructed, and ensure that he can operate his engine without fail, I feel sure he will have a darned good run for his money. The model flies with great ease and stability and its glide is just what the doctor ordered!
The Fuselage. Although I now almost always produce monocoque fuselages for my own amusement, there is no doubt that the old slabsider is more simple to build for the new-comer, and is a very stable type for competitions. This model is built by a method that I evolved a number of years ago. It is very easy to construct; automatically forms accurate angles of incidence, and when built is almost indestructible - all big points for a competition aspirant, or even for a general purpose flyer.
This method has been used on one of my old record models and also on a Sir John Shelley Cup winner, so it has been well tried in a practical manner and I recommend it to all. Take a look at the plan. First put some 1/16 balsa sheet on a building board or the kitchen table, and if the sheet is not wide enough for the depth of the fuselage then smear cement along the edges of several sheets and join them together; whilst drying, weight them down to keep them flat to the kitchen table - in order to keep in with the wife do not forget to put some grease-proof paper on the table first.
Now we can start. Stage A on the plan. Place some copying carbon paper over the sheet 1/16 balsa, lay the side elevation of the fuselage shown on the plan over this, and trace carefully the outline of the fuselage with a pencil. Trace in the positions of the uprights and remove the plan and you will find a blue outline of your model on the 1/16 in. sheet with correct angles of incidences of wing and tailplane all automatically aligned..."
Update 06/15/12: thanks to BrianCox, have uploaded a clearer version of this plan.
Update 05/08/2016: article pages, text & pics added, thanks to RFJ.
Modern redrawn plan in PDFvector format, by hogal.
Article pages, text & pics.
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This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.
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