Sure Flyer (oz4115)

 

Sure Flyer (oz4115) by Keith Laumer 1961 - plan thumbnail

About this Plan

Sure Flyer. Rubber sport model, simple construction for beginner's.

Quote: "A 30 inch rubber driven model with specially simple construction. Sure Flyer, by Keith Laumer.

Assembled framework of the Sure Flyer shows how designer Keith Laumer has kept the structure to the simplest minimum for a thirty-inch wingspan model capable of full one-minute flights. This is an ideal model for the novice.

MOST HIGH-PERFORMANCE models employ built-up construction for higher strength-to-weight ratio. You can learn some of the important basic techniques by building Sure-Flyer and you'll have plenty of flying fun when you're finished.

Start by covering the plan with waxed paper and laying out a fuselage side over the side view. Pin the longerons down first by holding them in place with pins either side as shown. Use medium hard 3/32 in sq balsa, cutting two of each vertical spaces as you go along and sticking one in place, saving the other for the second side which is made over the top of the first.

While the side frames are drying, cut out parts F1 to F5, using the materials noted on the plan. Bend the landing gear from 18 swg piano wire and lace it to F2 as shown. The holes for lacing must be bored first, using a pin drill or a sharpened length of piano wire.

Now remove the sides from the plan, sand them using a sanding block, and separate with a razor blade. Join the two sides on former F3; then add F2. Block up the frame (upside down) making sure that it is perfectly aligned, and let the cement set. You can make use of the waiting time by cutting out the rudder from medium 1/16 in balsa, and the elevator from soft 3/32 in balsa. Sand the edges to a smooth contour and smooth the surfaces, rounding the corners.

You can return to the fuselage now and add bulkheads F1 and F4. Use rubber bands to draw the sides together, to hold the parts in place. Add the cabin roof, part F5 - after first bending the wing hold-down wire and attaching to the underside with a piece of silk. Now measure the spacers on the top view and add to the top and bottom of the fuselage..."

Quote: "We go to September 1961 AEROMODELLER this time in search of Free Flight Plans... SURE FLYER the perfect subject for your next rubber powered model. This is the work of KEITH LAUMER and is a very attractive 30 inch cabin model with sheet tail and fin. It will take you through the traditional fuselage and wing construction techniques and when finished and trimmed out reward with some nice relaxing flying... I would be inclined to fit a D/T. It would be easily arranged to add a pop-up tail."

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Sure Flyer (oz4115) by Keith Laumer 1961 - model pic

Datafile:

Sure Flyer (oz4115) by Keith Laumer 1961 - pic 003.jpg
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Sure Flyer (oz4115) by Keith Laumer 1961 - pic 004.jpg
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* Credit field

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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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