Great Profile (oz12562)


Great Profile (oz12562) by Walt Musciano from Junior American Modeler 1973 - plan thumbnail

About this Plan

Great Profile. Control line profile trainer model.

Quote: "A Rugged control-line trainer for .049 to .09 engines. The Great Profile, by Walter A Musciano.

This solid-balsa control-line model plane is easy to build, economical, and a snap to fly on any engine from an .049 to an .099. The wing is not oversize as on many trainers. Very large wings make models 'float,' thereby threatening slack lines on every upwind pass of the circle. With a moderate wing and long tail-moment arm our model has more speed than the.average trainer but with considerably reduced control sensitivity. The speed increases the centrifugal force thereby reducing the chances of slack lines which spell 'crash' for any beginner.

This model is built from only two sizes of balsa sheet and one size of plywood plus scrap boxwood from a fruit crate. For ease of operation the engine is installed upright instead of on its side. Styling follows that of an 'old timer' or a contemporary open cockpit homebuilt design. Modern jet styling can be incorporated by carving a streamline canopy on the fuselage as the plans illustrate. A two-seater is also shown.

Control-line models are captive planes tied to the flier with thread, fishing line or fine wire and fly in a circle around the operator. The flier holds a short C-shaped handle vertically in his fist; to each leg of the 'C' is attached a length of line that leads to a pivoted lever-type three-armed mechanism on the model called a belicrank. A rod leads from this bellcrank mechanism to the elevators or horizontal hinged tail surfaces. When flying, the lines must be taut. By pulling on one of the lines the bellcrank pushes or pulls the rod thereby forcing the elevator up or down. This causes the model to climb or dive.

As the model circles the flier he must turn at the same speed, facing the model at all times. The flier can than change the model's altitude by merely raising or lowering the outstretched arm that is holding the control handle. Raising the arm pulls the upper line which makes the model climb, and lowering the arm pulls the lower line which makes the model head toward the ground.

Construction: Start with the fuselage or body. For economy this must be pre-assembled by cutting the 1/2 x 2 x 36 inch balsa plank in three pieces and then cementing them together as the plans illustrate. When dry, the fuselage outline is traced onto tissue or other semi-transparent paper. If none is available, tape the plans to a window during daylight and tape a clean piece of paper over them. You should be able to see clearly the outlines of the fuselage. Trace the outline, including the wing and tail cutouts, and the notch for the engine mount.

To transfer this cutting outline to the wood, place the tracing atop the balsa and redraw the lines so that the wood is scribed with the cutting line. With a soft pencil or ball-point pen redraw the scribed lines on the wood. This tracing procedure must be done with accuracy. Use a hand coping saw or an electric jig saw to cut the fuselage to shape. The wing opening is made this way. First, drill a hole through the opening. Now detach and pass the thin saw blade through the hole. Reassemble the saw, and the opening for the wing can be cut.

Trace the plywood doublers for the fuselage as described and cut to shape with coping or jig saw. Smear balsa wood cement on the inside surface of each doubler and press firmly against the fuselage side. Slide the doublers around so the cement is well distributed, then remove the doublers and let the cement dry. Apply a second coat of cement to the doublers and again press firmly against the fuselage..."

Direct submission to Outerzone.

Scans from dfritzke, cleanup by Circlip.

Update 09/11/2020: Added vectorPDF and CAD (dxf and dwg) versions of this plan, thanks to Valeria367.

Quote: "Hi! Steve and Mary. Good afternoon. How are you? I hope all are fine. Years ago, I bought one copy of the Walt Musciano's "Great Profile" plan (oz12562). And, some days ago, I saw you published one copy of it on your web page. How she is one beautiful little model, I worked in the last days to make one CAD version, and now it's ready, and I sent it to you. As usual, I add the PFD vector, and both CAD vectorial formats: DWG and DXF. All the best, from your friend. Valeria367"

Supplementary file notes

VectorPDF plan tracing.

CAD file

This plan is available for download in CAD format.


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Great Profile (oz12562) by Walt Musciano from Junior American Modeler 1973 - model pic

  • (oz12562)
    Great Profile
    by Walt Musciano
    from Junior American Modeler
    July 1973 
    20in span
    IC C/L
    all formers complete :)
    got article :)
  • Submitted: 17/09/2020
    Filesize: 239KB
    Format: • PDFbitmap • PDFvector • CADfile
    Credit*: dfritzke, Circlip, Valeria367

Great Profile (oz12562) by Walt Musciano from Junior American Modeler 1973 - pic 003.jpg
Great Profile (oz12562) by Walt Musciano from Junior American Modeler 1973 - pic 004.jpg

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User comments

This is without doubt my favourite Walt Musciano photo, ever. From his 'late Vegas' period.
SteveWMD - 11/11/2020
Not even Ziggy Stardust would wear those pants!
Miguel - 11/11/2020
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Download File(s):
  • Great Profile (oz12562)
  • Plan File Filesize: 239KB Filename: Great_Profile_oz12562.pdf
  • Supplement Filesize: 3452KB Filename: Great_Profile_oz12562_article.pdf
  • Supplement Filesize: 484KB Filename: Great_Profile_oz12562_vector.pdf
  • CAD Zip Filesize: 124KB Filename:
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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.


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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