Great Lakes Biplane (oz12112)

 

Great Lakes Biplane (oz12112) by Aeromodeller Staff from Aeromodeller 1961 - plan thumbnail

About this Plan

Great Lakes Biplane. Profile scale model, for either FF or CL.

Dual-purpose design: for C/L with .049 engine, or for FF with a Cox TD .020 engine.

Direct submission to Outerzone.

Update 21/04/2020: Added article, thanks to Pit.

Quote: "Fly your own 18 inch Great Lakes midget biplane. Free Flight or Controline An all-sheet balsa simpleton for .5 - .8 cc or Cox Tee-Dee's.

Yeeoow! That was our immediate reaction to the first free flight we made with the Cox Tee-Dee .020 bipe, plans for which are on the following pages. It's a pip of a model, and we've no doubt at all that it'll go equally well on an .010 too. Be sure of that side thrust (same for control line) and to fit the prop on back to front if you don't want a searing race track performance on YOUR first flight too. We grossly underestimated the power of the new Tee-Dee!

The control line version has had checks with the AM .049 and the AS 55 diesel, either of which give loops, wingovers and inverted flight on lines as short as 15 ft long. Wings are set at zero incidence and the balance is forward for C/L use, otherwise there's remarkably little difference between the two, except of course for the tailplanes.

Cut out all 1/8 balsa parts. Fit engine bearers in 1/4 in fuselage on C/L model, drill holes for engine bolts and woodscrews. For Tee-Dee F/F version, mount the scrap 1/4 in fairing and 1/8 ply bulkhead. Coat all surfaces with two applications of sanding sealer and when hard, commence assembly.

For C/L model join top wing halves flat, key interplane struts (with 18 swg strengtheners) into wings, using the card templates as a jig to set the angle of wing stagger and equal incidence.

For the F/F version the dihedral angle is set by cracking the lower wing down its centre line and keying the two sets of wing halves with the interplane struts, using the same jigs. The centre of lower wing is then pinned down and the jig sets the dihedral. Use spacers between upper and lower wings at centre (referring to plan for gap) and butt join top halves with upper 1/4 in fairing to strengthen.

While the wings are setting, make up the 'N' struts from 1/8 sq. When set, add fairing below upper wing c/section, join fuselage to lower wing, and fit N struts. Mount fin.

Attach 18 swg brass control horn as bellcrank mount and 22 s.w.g. light alloy elevator horn to C/L elevators which are joined with 1/8 dowel and sew to tailplane. Bolt bellcrank in position and make up controls, noting the lead-out guide at Port strut. Fashion the undercarriage legs and bind with thread at the axle end. Then sew to fuselage. Retain wheels with fuel tubing.

We used HMG dopes on the C/L model and Yeoman transfer decoration for F/F. When dope is dry mount engine and tank. For C/L this is retained by a length of fuel tubing secured by two 5/8 in woodscrews (see plan)."

Supplementary file notes

Article.

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Great Lakes Biplane (oz12112) by Aeromodeller Staff from Aeromodeller 1961 - model pic

Datafile:
  • (oz12112)
    Great Lakes Biplane
    by Aeromodeller Staff
    from Aeromodeller
    September 1961 
    18in span
    Scale IC F/F C/L Biplane Civil
    all formers complete :)
    got article :)
  • Submitted: 26/03/2020
    Filesize: 224KB
    Format: • PDFbitmap
    Credit*: JJ

ScaleType:
  • Great_Lakes_Sport_Trainer | help
    see Wikipedia | search Outerzone


    ScaleType: This (oz12112) 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/Great_Lakes_Sport_Trainer
    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.

Great Lakes Biplane (oz12112) by Aeromodeller Staff from Aeromodeller 1961 - pic 003.jpg
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Notes

* Credit field

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Scaling

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