Shoestring (oz14863)


Shoestring (oz14863) by Pat Tritle 2010 - plan thumbnail

About this Plan

Shoestring. Radio control scale model. Wingspan 30.5 in, wing area 185 sq in, for electric power with Speed 400 motor.

Quote: "A scale backyard pylon racer. Shoestring, by Pat Tritle.

THE YELLOW AND RED SHOESTRING has always been one of my favorite airplanes and over the years, I've built several free-flight and U-control versions, all of which were great flyers. A few years ago, I started thinking about building a small RC Shoestring in a Speed 400-size. With the growing popularity of brushless motors and LiPo battery technology being what it is, I decided to forge ahead.

I designed the Shoestring so it could be built and flown by modelers with intermediate building and piloting skills while still being a good representation of the full-scale Shoestring. The result is a very stable, reasonably fast, all-sheet balsa model that's a pure ioy to fly! I've tried everything I can to make the airplane 'snap' out of a turn and determined that it just won't. Its stall is more of a 'mush' and it still maintains aileron control all the way down the speed range.

The model was designed around the 6V Speed 400 motor and is controlled by only elevator and aileron. Hand-launching is easy, as there is plenty of fuselage to hold. Landings are done 3-point, so the fixed tail-wheel keeps a good straight line during the short rollout; if you're flying onto grass, just plop it in! Though the model has a good roll rate, the aileron input isn't twitchy at the center at all, Even with the CG balance point moved aft, the elevator never gets "goosey." When the CG is moved too far aft, the model just doesn't come up on step. All in all, its a good, solid, honest airplane that I recommend to anyone who's entering the wonderful world of little airplanes.

Fuselage: As always with a model of this type, it must be built light. I built my prototype using hand-selected balsa, but using the contest-grade stuff will only help if you're really serious about building a lightweight airframe. Start by cutting and shaping the vertical and horizontal stabs. The elevator will be hinged with UltraCote after the surfaces have been covered.

Build the fuselage next. Start by cutting the fuselage sides and doublers, following the triangular marks on the plans, then, cut the formers and former doublers, assembling them as you go. Glue the doublers to the fuselage sides and add the balsa tri-stock and 1/3-inch-square balsa lower longerons. Glue formers F-3 and F-4 to the right-hand fuselage side, using a triangle to align them. Now glue the left-hand side of the fuselage to the formers. Glue the tail post pieces together and add formers F1, F2, F5 and F6 and the 1/16 x 1/8 crosspieces. Now you can add the Winch-square top stringer, 1/8 inch balsa bottom sheeting and 1/4-inch balsa chin block.

Before adding the top sheeting, be sure to install a Sullivan no. 507 guide tube for the elevator pushrod. Now is a good time to shape the balsa tail-fairing blocks and add the lite-ply landing-gear plate and balsa triangle and lite-ply wing-bolt plate..."

Direct submission to Outerzone.

Supplementary file notes



Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction

Shoestring (oz14863) by Pat Tritle 2010 - model pic

  • (oz14863)
    by Pat Tritle
    from Model Airplane News
    October 2010 
    30in span
    Scale Electric R/C LowWing
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 04/10/2023
    Filesize: 834KB
    Format: • PDFbitmap
    Credit*: theshadow
    Downloads: 619

  • Condor_Shoestring | help
    see Wikipedia | search Outerzone
    Test link:
    search RCLibrary 3views (opens in new window)

    ScaleType: This (oz14863) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

    If we got this right, you now have a couple of direct links (above) to 1. see the Wikipedia page, and 2. search Oz for more plans of this type. If we didn't, then see below.

    ScaleType is formed from the last part of the Wikipedia page address, which here is
    Wikipedia page addresses may well change over time.
    For more obscure types, there currently will be no Wiki page found. We tag these cases as ScaleType = NotFound. These will change over time.
    Corrections? Use the correction form to tell us the new/better ScaleType link we should be using. Thanks.

Shoestring (oz14863) by Pat Tritle 2010 - pic 003.jpg

Do you have a photo you'd like to submit for this page? Then email

User comments

No comments yet for this plan. Got something to say about this one?
Add a comment



Download File(s):


* 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.


Terms of Use

© Outerzone, 2011-2024.

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.