Twin Gull (oz15261)

 

Twin Gull (oz15261) by Rupert Moore 1943 - plan thumbnail

About this Plan

Twin Gull. Wakefield competition model, with twin-pusher layout. Wingspan 46 in.

As requested on the Wanted page.

Quote: "Some Notes on the Twin Gull, a 46 in Wakefield twin pusher. Designed by Rupert Moore ARCA.

BEFORE starting, I refer you to the following articles in previous Aeromodellers: Flying Scale Blenheim, Dec 1942, page 557 ; Short Popjoy Scion, Feb 1943, page 697 ; Wakefield Twin Gull and Soldering Simplified, both Jul 1943, pages 945 and 974.

The fuselage sides, spars, centre section halves, wings and tail are all built on boards. The fuselage is assembled minus the top stringers. The two separate Centre section halves are built flat, omitting all giblets and ribs R2 and R3 until the shafts D2 and box spars are in place when the sections are completed.

The stirrups on shafts D2 are made from untempered steel and being soft with no spring in it, it is very easy to work. Shafts Dr and D2 can also be made of silver steel (mine are), but piano wire is better. The 'Fork' prongs must be piano wire. Three tools are essential to make this drive: small round-nosed pliers, small square pointed-nosed ones, and a small steel cutting file.

The stirrups are bent to shape on the plan and cut to length. The necks are opened slightly to enable the fiats to be filed and then closed again. Bind necks of stirrup with fuse wire and solder solid. There are four hardwood bearings made by making a bit of scrap shaft red hot and burning half away into the wood. The four bottom halves are cemented in. The brass bearing plates should be bent into square U's to fit the spar and the spar cut long enough to force the bearings against the stirrup necks and prevent end slap. The box spar ends should be well cemented and the shaft lowered into the box when the lid with the other half of the wood bearings is cemented in place. Bind over bearing plates with cotton and cement.

The distance between shafts D1 and D1 is determined by the distance between the centres of the stirrup bars as are the bushes in the gear box (regardless of the plan!).

In order that the nose block can be 'broken' for stretch winding, the two top gears are soldered to shafts D1 and D1, leaving 5/8 in projecting to locate the two top bushes of the gear box. The other two gears are fixed to the nose block and the tension of the rubber holds them in mesh.

The front bearings for the shafts D1 should be made, the shafts put in the gear box and the bearing slotted on. The shafts should be threaded up the fuselage and the gear box pinned in place. Mark exactly length of shafts to central marks, on stirrups, cut bearing spar from hard balsa and mark position for holes for shafts..."

Direct submission to Outerzone.

Quote: "Hi Steve, Here's a little more grist to the outerzone mill. The first is a plan etc for C. Rupert Moore's Twin gull Wakefield featuring the patented Moore drive. I got as far as making up the fuselage frames and then was daunted by all the wire work and soldering. I think it could be converted to electric power relatively easily or built as a tow line glider... Regards, Andy"

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Twin Gull (oz15261) by Rupert Moore 1943 - model pic

Datafile:
  • (oz15261)
    Twin Gull
    by Rupert Moore
    from Aeromodeller
    September 1943 
    46in span
    Rubber F/F Multi Pusher
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 21/04/2024
    Filesize: 1140KB
    Format: • PDFbitmap
    Credit*: AndySnelson
    Downloads: 486

Twin Gull (oz15261) by Rupert Moore 1943 - pic 003.jpg
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User comments

This is one of those models from back then that would benefit from modern technology and turn it into something simply stunning.
John Green - 30/04/2024
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* Credit field

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Scaling

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