Sperry Curtiss Monoplane (oz13054)

 

Sperry Curtiss Monoplane (oz13054) by Dave Linstrum from Model Builder 1995 - plan thumbnail

About this Plan

Sperry Curtiss Monoplane. Peanut scale rubber model.

Quote: "If it's got two wings it's got to be good. The engineers at Sperry apparently didn't believe that credo when they came up with this monoplane conversion of the famous JN-4. The

What do you get when you forget to put the second wing on a WWI biplane you got surplus for a song? You get this trim monoplane from 1923, which has great lines for a scale subject. It really is a 'Plain Jane' in unbleached linen and with no jazzy decoration, but it more than makes up for it in flying fun. We thank Doc Mar-tin of MIAMA for the inspiration - this model is a bit sturdier (and simpler if you use the flat-bottom rib section) than his very light Hangar Pilot version.

If you're unfamiliar with stick-and-tissue construction, try a Peck-Polymers ROG, Sky Bunny or simple Peck Peanut kit like the Nesmith Cougar before you try to scratchbuild the Sperry/Curtiss Jenny. The Peck kits are available in most good hobby shops or by mail order - see their ad in this issue of MB.

If you're ready to build this historic flier, start by making two 11 x 17-inch copies of the full-size centerfold plan (press it tight to the glass) at your local copy shop. Tape one to your building board, cover it with waxed paper or plastic food wrap to prevent glue bonding to the paper. Use the other copy for patterns, tracing decorations, etc. Be sure to read all of the callouts on the plans and assemble all of the required tools, balsa (use 6-pound stock for indoor, 10-pound for outdoor), tissue, glue and paints (if you choose to airbrush rather than just use colored tissue). Do not dope this model - it will warp like a pretzel! Use rubbing alcohol to shrink the tissue, or pre-shrink the tissue on a frame before covering the model.

A basic workshop tool inventory would include an X-Acto knife with a #11 blade or broken double-edge blade (be careful!), dressmaker's pins - preferably with bead heads, self-healing cutting board (a scrap of dark artist's mat board will do), glue applicator, fine-point artist's sable brush, and needle nose pliers.

The uncovered framework photo shows the major framework assembled and the plans are fully annotated, so there's no need for step-by-step assembly instructions here.

It's best to add details like ID numbers before covering but after any airbrushing of the tissue. Cover the model using thinned white glue. Remember, no dope anywhere on the model! A #8 and #5 Micron Pigma India ink technical pen make a great pair for lettering and control surface outlines, etc. It's non-smear and permanent.

We have found that trimming high-wing monoplanes like this one is easier if you build in some down and right thrust, adjusting for a loose right-hand circle in the climb. Outdoors the glide. is a minor part of the flight; indoors the prop should turn in cruise until touchdown. The balance point should be as shown on the side view.

Add solder under the nose to adjust the balance - we prefer this to greasy clay, though the latter is traditional. Be sure you have the correct amount of wing wash-out at the tips. A bit of wash-in (trailing edge low) in the right wing or a paper trim tab bent down can keep the right wing up in a turn.

If you want to have a fantasy as a Twenties barnstormer, here's your chance. Rev up that old engine, take off from the grass field and fly into the blue on your one-wing Jenny. You can be Waldo Pepper or whoever you fancy!"

Direct submission to Outerzone.

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Sperry Curtiss Monoplane (oz13054) by Dave Linstrum from Model Builder 1995 - model pic

Datafile:
  • (oz13054)
    Sperry Curtiss Monoplane
    by Dave Linstrum
    from Model Builder
    September 1995 
    13in span
    Scale Rubber F/F Parasol
    all formers complete :)
    got article :)
  • Submitted: 06/05/2021
    Filesize: 304KB
    Format: • PDFbitmap
    Credit*: MB2020

ScaleType:
  • Curtiss_JN-4 | help
    see Wikipedia | search Outerzone


    ScaleType: This (oz13054) 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.


    Notes:
    ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/Curtiss_JN-4
    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.

Sperry Curtiss Monoplane (oz13054) by Dave Linstrum from Model Builder 1995 - pic 003.jpg
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Sperry Curtiss Monoplane (oz13054) by Dave Linstrum from Model Builder 1995 - pic 004.jpg
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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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