Ryan Dragonfly (oz14723)
About this Plan
Ryan Dragonfly. Free flight scale model. Wasp .049 engine shown.
Direct submission to Outerzone.
Update 5/8/2023: Added article, thanks to RFJ.
Quote: "This sure-fire scale free-flight model has 224 inches of wing area, 39 inch span and weighs 11 oz. Dragonfly, by Dick Ealy.
A scale free-flight model is a challenge to a builder's ingenuity, experience and workmanship. The difficult part comes in choosing a scale configuration that will lend itself readily to model flying. The Ryan Dragonfly YO-51 observation plane was chosen from hundreds of drawings as the one which is most nearly perfect for a scale free-flight model.
The full-scale YO-51 features unusual flight characteristics and sensational ability to make short, steep take-offs and nearly vertical landings. Developed for liaison work for the US Army, it has a minimum flying speed of only 32 mph. Slots run along the entire leading edge, and flaps along the entire trailing edge.
Proportions of the model are close to that of a contest pylon job. Note the short nose and long tail-moment arms and extra large stab, all of which produce a smooth, flat glide. The wide gear is well forward, avoiding ground-loops on take-offs.
Construction is simple, so let's get started on your 3/4 in to 1 ft scale Dragonfly. Plans are half-size (except where indicated), so draw everything twice up before you begin.
FUSELAGE: Start with the fuselage. Pin 1/8 square hard balsa stock to the drawing and cement one complete side panel together. When dry, build the second side panel on top of the first. After the cement dries, remove the sides and separate them from each other. Place extra cement on the cross-pieces for added strength.
Notch the longerons on the inner side of section F and bend them toward the center line. Set up both panels inverted on a table, adding the 1/8 square crosspieces from sections F to J. Now fill in sections A, B and C with 1/8 sheet balsa..."
Supplementary file notes
Article.
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(oz14723)
Ryan Dragonfly
by Dick Ealy
from Flying Models
June 1953
39in span
Scale IC F/F Parasol Military
clean :)
all formers complete :)
got article :) -
Submitted: 25/06/2023
Filesize: 433KB
Format: • PDFbitmap
Credit*: dfritzke
Downloads: 308
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ScaleType: This (oz14723) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.
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- Ryan Dragonfly (oz14723)
- Plan File Filesize: 433KB Filename: Ryan_Dragonfly_oz14723.pdf
- Supplement Filesize: 2708KB Filename: Ryan_Dragonfly_oz14723_article.pdf
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Notes
* 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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