De Halibut Bosty Moth (oz14220)


De Halibut Bosty Moth (oz14220) by John Blair 1987 - plan thumbnail

About this Plan

De Halibut Bosty Moth. Bostonian rubber model.

Quote: "DeHalibut Bostonian Bosty Moth, by John Blair. The author has long favored the DH80A Puss Moth, so this Bostonian version was a logical result. Construction is made easy by the use of laminated surfaces for the wing, rudder and elevator.

The DH 80A Puss Moth has long been one of my favorite airplanes. Recently, after completing an indoor rubber scale model of the craft, I started looking at my model as a Bostonian. The more I studied it, the surer I was that it would 'tubby up' really cute. A recent snowstorm gave me the time to do some drawing, so here is the plan!

This is not a difficult model to build, but there are enough 'fiddly bits' to make it interesting. To retain as much scale flavor as possible, the front end is held as near to true form as practical. This makes for a complicated job of glazing the windshield and doing the inverted Gypsy engine, but the results justify the effort.

Think light when building a Bostonian. Choose firm 1/16 square for longerons; softer stuff for crosspieces. Fill in the forward bay with soft 1/32 sheet, grain vertical. After the fuselage box has been completed, the 1/32 sheet cowling is glued over the top, grain lengthwise. The nose ring of 1/64 ply completes the structure.

Before building the wing and tail assemblies, you will have to laminate the outlines. My personally preferred method for this job is to cut out some slightly undersized forms from corrugated box-board. This form is then faced with a strip of fairly thin cardboard. A layer of masking tape over the cardboard prevents the outlines from sticking during the drying process.

For your outlines find your lightest piece of stringy 1/32 sheet. With your Uber Skiver and a good straight edge, strip a supply of 1/32 x 1/16 wood for your laminates and for ribs in the fin and stab. While you are at it, strip some 1/32 x 3/32 for wing spars. Soak the outline pieces in hot water for 20 minutes or so. Using good quality carpenters' glue, (Tite-Bond, Elmer's) glue two strips together for each outline. Then, place the pair of outlines side by side on the form, fastening one end with a narrow strip of masking tape. Gently but firmly pull the wood around the form, taping down in three or four places as you go. Easy, wasn't it? Let these assemblies dry overnight. When ready, the outlines will pop off the forms easily, and the pair can be easily separated with a knife.

Use six- to eight-pound 'C' grain for wing ribs. First, make two pattern ribs from scrap 1/16 sheet. Then cut ten pieces 3/8 x 3-1/4 from your rib stock, stack them accurately between the pattern ribs, and secure the bunch with a couple of pins. Shape the ribs, sand and cut spar notches. When installing the ribs, trim from the trailing edge. This will give the spars a slight "rake" (due to the sweepback of the leading edge), but this is no problem. Due to the tapered tips and the gulled center, the top of the wing presents a covering problem. It is best to cover the tops with four pieces: the gull, the main portion, and two tip pieces. The rest of the plane is no particular problem to cover - just take your time and enjoy it..."

Direct submission to Outerzone.

Quote: "Hi Mary & Steve, Attached is one of the missing Bostonian plans that appeared in Model
Builder. I could not find it offered anywhere, so I have attached a scan here. Sorry, but I was not able to stitch it [fixed now]. Also, I'm missing a part of the article [fixed now)]. Cheers, Adrian."

Supplementary file notes



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De Halibut Bosty Moth (oz14220) by John Blair 1987 - model pic

  • (oz14220)
    De Halibut Bosty Moth
    by John Blair
    from Model Builder
    August 1987 
    16in span
    Scale Rubber F/F Cabin Civil
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 22/11/2022
    Filesize: 216KB
    Format: • PDFbitmap
    Credit*: AdrianCulf
    Downloads: 327

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De Halibut Bosty Moth (oz14220) by John Blair 1987 - pic 003.jpg
De Halibut Bosty Moth (oz14220) by John Blair 1987 - pic 004.jpg

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  • De Halibut Bosty Moth (oz14220)
  • Plan File Filesize: 216KB Filename: De_Halibut_Bosty_Moth_oz14220.pdf
  • Supplement Filesize: 1195KB Filename: De_Halibut_Bosty_Moth_oz14220_article.pdf
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* Credit field

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