DH Gypsy Moth (oz5715)

 

DH Gypsy Moth (oz5715) by Elmer Nowak from Flying Models 1962 - plan thumbnail

About this Plan

Gypsy Moth. Gipsy Moth. Radio control scale model biplane for .45 to .60 power.

Quote: "Of all the biplanes ever built, perhaps one of the most famous of them all was the Gypsy Moth, for it was in such a plane as this that Amy Johnson, with only 80 hours of flying to her credit, on the 5th of May 1930, took off from a small airfield in England, and became the first woman to fly solo, from England to Australia.

The first Moth took to the air in 1925. Over a period of years over 3,000 of these planes were built, and many are still flying today. Performance figures varied according to power plants used, and modifications. Two different wheeled undercarriages were used. Moths were also flown as single seaters. There were racing versions, training and sport planes. Some had head rests, some with wing slots, and also with sliding canopies over the cock-pits. Several models had radial engines as on the Ganet Moth; some had the motors exposed, and others cowled in.

A plane such as this offers to the R/C scale builder the ideal model, as he has a wide variety of finishes to choose from. In addition to being simple to construct, the model is an excellent flier.

The DH 60 had a span of 28 feet 2-1/2 inches, and an overall length of 22 feet 4 inches. Our model spans 67-1/2 inches, with an overall length of 53-1/2 inches, thus being scaled down to of the real plane. Total effective wing area is 1280 sq inches, and total weight of the plane is just under 7-1/2 lbs. A K&B .45 flies it very well, however if the plane is any heavier then a .56 or .60 is recommended.

Careful study of the plans will show that the 'Moth' is a simple plane to build, it is very rugged, and light for its size. We feel that most modelers building a scale plane have some building experience, so rather than go into building details, the more interesting highlights will be outlined.

It is very important that all wing surfaces be true. A wing panel is no truer than the surface it is built on. Make sure that all your work bench is free from warps, and that the surface you build on is level. The only deviation from scale on our model was the wing airfoil section. In order to have a fully acrobatic ship, a modified 2415 section was decided on. Also the wings were built in one section rather than folding, as some were built with non-folding wings.

To those who may want to build and fly this plane by rudder only, a Clark Y section is recommended, and the ship will fly very well on rudder only, providing that not too much rudder movement is used, as the surfaces are larger than on most other planes.

The lower wing is set up at 0 degrees and the upper wing has 3 degrees positive incidence. The stab is set at 1-1/2, but should not be more than 2 degrees. This was found to have very good flight characteristics in both upright, and inverted positions. While the motor mounts are shown to be at 0 degrees, 1 degree down and 2 degrees right thrust was used on our plane. The interplane wing struts are made of very soft balsa, and are plugged into the wing. The flying wires are of a round elastic, and this is held in by the struts. This makes it very easy to assemble, and in the event of a rough landing, the struts can pop out or break without any damage to the wing fabric.

Make, sure that the CG and balance point are exactly as shown on the plans, if not change the position of the R/C equipment until it does. Be careful that the CG is not ahead of the location as on the plans, as a very unstable condition will result, causing the model to go into a series of stalls, thus making it very hard to control.

Begin your construction by building the fuselage first. Lay out sheet 1 and sheet 2 on your workbench, and start by cutting out plywood section Y-Y, from a hard piece of five-ply. Next make the jury struts from 1/8 in piano wire, and fasten to section Y-Y with metal clamps (Top Flite landing gear fasteners are ideal for this). Be sure to keep all jury struts true, arranging the upper section to fit the airfoil, and set up at 3 degrees positive incidence. The struts may either be spot welded, or bound with wire and soldered, and the top section wrapped with electrical tape where it comes into contact with the wing surface..."

Direct submission to Outerzone.

Update 22/05/2018: added article, thanks to theshadow.

Supplementary file notes

Article.

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DH Gypsy Moth (oz5715) by Elmer Nowak from Flying Models 1962 - model pic

Datafile:
  • (oz5715)
    DH Gypsy Moth
    by Elmer Nowak
    from Flying Models
    April 1962 
    68in span
    Scale IC R/C Biplane Civil
    all formers complete :)
    got article :)
  • Submitted: 09/07/2014
    Filesize: 1089KB
    Format: • PDFbitmap
    Credit*: JJ

ScaleType:
  • De_Havilland_DH.60_Moth | help
    see Wikipedia | search Outerzone


    ScaleType: This (oz5715) 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/De_Havilland_DH.60_Moth
    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.

DH Gypsy Moth (oz5715) by Elmer Nowak from Flying Models 1962 - pic 003.jpg
003.jpg
DH Gypsy Moth (oz5715) by Elmer Nowak from Flying Models 1962 - pic 004.jpg
004.jpg

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User comments

Added image of Flying Models cover April 1962, featuring the DH 60 M Gypsy Moth, thanks to theshadow [more pics 004].
Mary - 22/05/2018
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Download File(s):
  • DH Gypsy Moth (oz5715)
  • Plan File Filesize: 1089KB Filename: Gypsy_Moth_68in_FM_04_1962_Elmer_Nowac_oz5715.pdf
  • Supplement Filesize: 1105KB Filename: Gypsy_Moth_68in_FM_04_1962_Elmer_Nowac_oz5715_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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