Long John (oz3311)

About this Plan

Long John. Rubber sports model by Ray Malmström.

Quote: "WITH RUBBER-POWERED MODELS, long flights depend a great deal on a long rubber motor capable of taking plenty of turns. Sounds like good sense doesn't it - and it is! Make yourself a LONG-JOHN in a couple of evenings of building fun and prove it.

Construction could hardly be easier or more straight-forward. Trace two sides on to 1/32 in medium sheets, carefully tracing in the wing position. Add 1/16 sq strip and nosepieces as shown, join_the completed sides with 1/16 sq pieces. Drill a small 1/16 in dia hole for the rear peg and reinforce with discs of thin card. Cover the top and bottom with 1/32 in. sheet, after adding top and bottom 1/16 sheet nosepieces. Note fin slot and small opening underneath rear of fuselage for access to motor and rear peg. Add end piece C, and small wing dowels (1/16 in dia). Complete fuselage by adding 1/16 sheet cabin profile and tailskid.

The undercarriage assembly needs no detailing. Complete with balsa wheels it is held to the bottom of the fuselage by 34 layers of doped-on tissue. Cut fin, noting grain direction, and tailplane from 1/32 sht. Reinforce tailplane with 1/32 sht. strips as shown. Cement in position and check it is at right angles to the fuselage sides. Cement fin into fin slot. Check that it is vertical.

Make the noseblock from 1/4 in sheet and drill accurately to take a 20 swg brass bush which may need cutting to size, using a vice and a hacksaw. The 1/32 ply-wood squares cemented to the front and rear of the nose-block hold the bush firmly in position. Use a 5 in dia KK plastic propellor (from your model shop)..."

Update 22/12/2016: Added article pages, thanks to MikeNelson.

Supplementary file notes

Article pages.

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