Piper PA12 Super Cruiser (oz14467)

 

Piper PA12 Super Cruiser (oz14467) by Bill Bowne 2011 - plan thumbnail

About this Plan

Piper PA12 Super Cruiser. Radio control scale model, for electric power. Wingspan 57.7 in, wing area 497 sq in.

Direct submission to Outerzone.

Quote: "Piper PA12 Super Cruiser. My wife and favorite flying partner, Micki, asked me to build us something Cub-ish, but not another yellow Cub. So, looked at Piper’s other designs and we agreed on the Super Cruiser. Still has Cub lines, still has those sweet flying characteristics, but also has some added benefits - like no exposed engine cylinders or shock cords.

As yet another benefit, the PA12 gave me an opportunity to try a new finishing method, Doculam and latex house paint. As we’ll see, later, that worked out pretty well.

The model builds like a big, simplified rubber job; those curvy outlines were all laminated from 1/16 balsa (please see the accompanying article on laminations that I wrote for our club newsletter). I put the nose doublers on the outside of the fuselage, so they could simulate the full-scale cowling, and I put ‘facing strips’ on the fuse side, to keep the covering from touching the bulkheads and bracing.

When I built the PA12, outrunners were still pretty much unknown, so I used one of the Jeti 30/3 inrunners I had on hand. An outrunner, converted to a bottom shaft motor, should work just as well.

With its light wing loading and big control surfaces, the PA12 served us for several years as a good sport model, especially for stall turns, wing overs, and slipping down to touch & goes - and it was doing one of those touch & goes when a bit of heavy-handedness on the rudder broke the tailwheel strut loose!

Doculam is an interesting film. It requires a lot of heat, but once it’s shrunk, it stays shrunk. The problem is finding wrinkles in a glass-clear film BEFORE you paint it! The side windows were unpainted Doculam, but I did use clear acetate for the windshield.

I got the paints from our local DIY store, buying sample pints. Thinned with clear Windex, they sprayed on easily. I did find it hard to keep the paint from peeling with the masking tape, but buffing the Doculam (and cleaning it with acetone) before painting did help reduce a lot of that, as did giving the cream a full week to dry/cure before masking for the red.

The serial numbers on the wing and rudder were cut from white Ultracote/Profilm, buffed and cleaned with acetone, then sprayed with the same latex house paints. The key I found with Ultracote is that the glue on the film activates at a lower temp than melts the paint, and a much lower temp than melts Doculam. So, with an old gym sock over the old Monokote iron, I was able to iron the numbers onto the wing and rudder. For the fin markings, I cheated and printed scanned images onto clear laser mailing labels (Similarly, I printed the 'Piper' logo on the nose onto a bit of aluminum tape)."

Supplementary file notes

Build notes.
Lamination notes.

CAD file

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Piper PA12 Super Cruiser (oz14467) by Bill Bowne 2011 - model pic

Datafile:
  • (oz14467)
    Piper PA12 Super Cruiser
    by Bill Bowne
    2011 
    57in span
    Scale Electric R/C Cabin Civil
    clean :)
    all formers complete :)
  • Submitted: 03/03/2023
    Filesize: 757KB
    Format: • PDFvector • CADfile
    Credit*: BillBowne
    Downloads: 836

ScaleType:
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    see Wikipedia | search Outerzone
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    ScaleType: This (oz14467) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

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Download File(s):
  • Piper PA12 Super Cruiser (oz14467)
  • Plan File Filesize: 757KB Filename: Piper_PA12_Super_Cruiser_oz14467.pdf
  • Supplement Filesize: 882KB Filename: Piper_PA12_Super_Cruiser_oz14467_build_article.pdf
  • Supplement Filesize: 564KB Filename: Piper_PA12_Super_Cruiser_oz14467_laminations_notes.pdf
  • CAD Zip Filesize: 347KB Filename: Piper_PA12_Super_Cruiser_oz14467_cad.zip
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Notes

* Credit field

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Scaling

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