Upset - Radio control sport model.
Quote: "From a basic design concept in 1953, Great Britain's Chris Olsen developed the 'Upset' rated one of the finest entries at the 1967 World Championships...
Upset is a design which I made in 1965 in order to compete in the World Championships in Sweden. It was developed from a number of previous models which date back to my first radio controlled model which was built in 1953. The basic design of this model, which had a box fuselage, parallel chord wing, and stabilizer and due to the fact that low wing models had not then been invented, it had the wing mounted on the top of the box. This model was enlarged, reduced and altered in many ways until in 1957 it re-sulted in a model called Uproar (oz2220). As far as I was personally concerned this model was a success and was flown in many versions, nearly thirty in all, until 1964. The differences were all in detail, wing sections, rigging angles, etc. The early versions had 18% thick wings but the fallacy of this idea soon became apparent.
By the beginning of 1964 it had penetrated even my stubborn mind that the basic ugliness of the airframe was detracting from the better than average flying performance. Since the performance had been arrived at largely by accident, and recognizing that I was on to a good thing, I was rather loathe to give it up as there appeared to be some difficulty in finding a replacement. During the period that I had been flying Uproar in competitions, 1958 to 1963, as a result of seeing a German model with a low wing nearly win the King of the Belgars cup in 1958, I had become interested in low wing models and had attempted to make a low wing version of Uproar assuming that if the performance was similar and it looked better it would be a much better competition model.
Unfortunately this model did not turn out to be quite as good as Uproar and although it was developed through ten models it never proved better. However in 1964 it was decided to use the low wing model called Uplift (oz6027) in spite of its performance being no better, on the assumption that it looked a lot better than Uproar and competition judges being notoriously short sighted tend to be influenced in their judgment by what they see when the model is within focus, ie. on the ground.
The main problem with Uplift was a definite reluctance to spin and since some fool had explained to the British judges the difference between a spin and a spiral dive this was losing points in competition, also there was the competition in Sweden to consider, the judging is always pretty tough in these events. So with this in mind and a great deal more confidence than I should have had considering past experience, it was decided to design a completely new model..."
Did we get something wrong with this plan? That happens sometimes. Help us make a correction
* Credit field
The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.
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.
© Outerzone, 2011-2018.
All content is free to download for personal use.
For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.
Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.