Cabbie (oz14379)

 

Cabbie (oz14379) by Bill Bowne 2022 - plan thumbnail

About this Plan

Cabbie. Radio control sport biplane model, for electric power. Foam construction.

Direct submission to Outerzone.

Quote: "Cabbie, by Bill Bowne. Cabbie started as a Ken Willard-designed Schoolgirl (oz816), shrunken and modified for foam construction. A little change here, a little change there, another change here - and it wasn’t a Schoolgirl anymore. So, the new name, Cabbie (from CAbin BIplane, plus a few extra letters).

Cabbie does have impeccable manners - she’ll fly slow enough to let you relax and enjoy the view, whilst being very stable and trustworthy. Go to full throttle, and she’ll still be stable - but she’ll loop as long as you hold the stick back.

Cabbie boasts a grand total of 7 pieces of wood, none of them balsa. The rest of her bones are foam, a little carbon fibre, and some music wire.

A word about the mix of green and white foams. Except for the windshield, all the white foam is 6 mm Model Plane Foam (similar, I’m told, to the fabled 6 mm Depron). The green bits are 1/8” foam I hot-wired from house insulation foam, and that white windshield is 1/8” (actually 3 mm) Dollar Store foam. As the 1/8” poplar (lite) ply sold in the US is actually 3 mm, there are no potential metric/inch mismatches (it’s a model airplane, not a Mars probe).

For higher stress areas, I used NON-foaming, Clear Gorilla (Polyurethane) Glue; foam-safe glues such as Foam-Tac and Foam-cure are fine for most remaining gluing, although I did use thin CYA on the main undercarriage and dihedral braces. Finally, I used clear Polycrylic water-soluble ‘polyurethane’ (it really isn’t) to adhere Cabbie’s bond paper markings.

One 'oopsie' I encountered is that Sharpie pens WILL bleed through acrylic paints, so please, either don’t use them where the ink will be exposed, or use something else (i.e., a really soft pencil). Those little bits of blue ink you see here and there? Those were where the Sharpie I used bled through. Only a smear of glue over the marks sealed it enough to cover with paint.

Wing: Aside from the spars and dihedral angles, both wings build up the same way. Gorilla glue (or CYA) the carbon fibre spar halves (lightly sand the spars to give the glue a better grip) to the ply spar brace. Let cure. As the wings have different dihedral angles, I recommend doing one wing at a time.

Cut the spar and dihedral brace slots in the bottom panels. Spread very thin layers of Gorilla glue on the bottoms of the step layers (an old credit card works fine) and laminate the upper layers to the lower ones. I like to do the laminating LE to LE, to make it harder for me to build two left wings (Harder, not impossible!). Wipe away any leakage and let the wings cure under heavy, flat weights.

Sand the root dihedral. Glue the spar assembly into the wing panels and join the panels (two boards, taped together and covered with plastic sandwich wrap, provide a simple jig). Let all cure completely before sanding in the airfoil..."

Supplementary file notes

Build notes.
Decals.
Photo pack (of 12 build pics).
Statistics.

CAD file

This plan is available for download in CAD format.

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Cabbie (oz14379) by Bill Bowne 2022 - model pic

Datafile:
  • (oz14379)
    Cabbie
    by Bill Bowne
    2022 
    25in span
    Electric R/C Biplane
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 04/02/2023
    Filesize: 304KB
    Format: • PDFvector • CADfile
    Credit*: BillBowne
    Downloads: 370

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Cabbie (oz14379) by Bill Bowne 2022 - pic 006.jpg
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Download File(s):
  • Cabbie (oz14379)
  • Plan File Filesize: 304KB Filename: Cabbie_oz14379.pdf
  • Supplement Filesize: 84KB Filename: Cabbie_oz14379_build_notes.pdf
  • Supplement Filesize: 78KB Filename: Cabbie_oz14379_decals.zip
  • Supplement Filesize: 1092KB Filename: Cabbie_oz14379_photo_pack.zip
  • Supplement Filesize: 25KB Filename: Cabbie_oz14379_statistics.pdf
  • Supplement Filesize: 14KB Filename: Cabbie_oz14379_wing_alignment_jigs.pdf
  • CAD Zip Filesize: 1109KB Filename: Cabbie_oz14379_cad.zip
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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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