Simplex (oz8740)

 

Simplex (oz8740) by Bruse Lester, Roy Thomason from Canadian Hobbycraft 1947 - plan thumbnail

About this Plan

Simplex (Simplex Fuselage Model). Free flight rubber sport model.

Quote: "The model for April differs from the preceding ones in this series by having the rubber motor enclosed within the fuselage itself. The wood sizes have been kept to as large a size as possible so that the model will be exceptionally strong and rugged, as well as being easier to build with less chance of breaking the tiny pieces of wood and thus becoming discouraged when things do not seem to go right.

One major problem to the novice builder is that of balancing the model to get the best possible flights out of it after spending several hours to build the model. The 'Simplex' has been specially designed to acquaint you with that little gremlin called the 'Centre of Gravity', and how the correct placement of it is very import-ant in order to get good flights. Our handbook defines it as 'the centre of weight, or the point about which a body will remain balanced no matter what its position, and if supported at its centre, will remain continuously in a state of balance.' To the model builder it means that the model should balance horizontally or a little nose heavy at a point 1/3 of the wing chord.

Fuselage: First, coner the plans with a sheet of waxed paper, then care-fully select 4 pieces of good grade balsa wood 3/32" square. Slightly dampen the front end of the two that are to be the bottom 'longerons' of your fuselage. Just to be sure that the two fuselage side frames will end up both identically alike, it is best to make them both at once or better still build one and then build the other one right over the top of it. To build it, start by pinning down your bottom lengths first, keeping the dampened ends to the front. Next dampen the ends of the top lengths and pin them down using the outline for the fuselage from the plans..."

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Planfile includes article.

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Simplex (oz8740) by Bruse Lester, Roy Thomason from Canadian Hobbycraft 1947 - model pic

Datafile:

Simplex (oz8740) by Bruse Lester, Roy Thomason from Canadian Hobbycraft 1947 - pic 003.jpg
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Simplex (oz8740) by Bruse Lester, Roy Thomason from Canadian Hobbycraft 1947 - pic 004.jpg
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Simplex (oz8740) by Bruse Lester, Roy Thomason from Canadian Hobbycraft 1947 - pic 005.jpg
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Simplex (oz8740) by Bruse Lester, Roy Thomason from Canadian Hobbycraft 1947 - pic 006.jpg
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Simplex (oz8740) by Bruse Lester, Roy Thomason from Canadian Hobbycraft 1947 - pic 007.jpg
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Simplex (oz8740) by Bruse Lester, Roy Thomason from Canadian Hobbycraft 1947 - pic 008.jpg
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User comments

Simplex model. I am sending you these photographs in case they are useful to you: I built the model and I am waiting for the opportunity to fly it José [pics 005-008].
Jose - 05/10/2020
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* 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.

Scaling

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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