About this Plan
Sunbeam. Free flight sportster, Cox .020 Pee-Wee shown.
Quote: "34 inch span free flight sportster for .3 - .5 cc motors. Sunbeam, by John Kay.
SUMMER FLYING DAYS are here again, and what better way to enjoy them than with this attractive quick-to-build all-sheet free flight sportster. Sunbeam is ideal as a first step in power modelling, and follows on from my earlier design Moonco (oz2352) the CO2 powered model that was offered as a free plan in the May 1978 Aeromodeller. The all-sheet construction follows the same lines and the model has a similar Jedelsky type wing. The tailplane is fitted on the underside of the fuselage so that the fin can be directly glued to the fuselage and not knocked out of alignment.
Whilst designed for free flight, Sunbeam can be converted to fit light-weight radio weighing 4 - 5 oz. Suggested modifications of the fuselage formers are included on the plan. The original was powered by a Cox Peewee .020. The model is suitable for other small engines such as Cox TD.020, DC Dart and Humming Bird. The more powerful of these engines should be used for the radio control version.
If possible choose two sheets of 3/32in quarter grain sheet and the other two medium straight grain. Select a straight grain and a quarter grain for the wing panels. The remaining quarter grain 3/32in sheet is cut in half and re-joined to form an 18 in x 6 in panel. Choose the size of the sheets with a minimum gap between them and then using Sellotape to join the panels in three or four places and then a further long strip is used to cover the whole length of the joint. By folding back the balsa, using the Sellotape as a hinge, squeeze a bead of PVC glue along its length and close, remembering to wipe off the surplus glue with a damp cloth.
I use PVC adhesive that will sand; however, if you prefer balsa cement, pre-cement the joints before finally gluing together. The panels should now be left to dry, weighted down on a flat surface, for 6-8 hours...."
Hi Mary / Steve, the plan of the Sunbeam. See its not on the outerzone yet . Sunbeam by John Kay from August 1979, Aero Modeller. Free flight power sports model, 36 inch wingspan for Cox 020 Pee Wee. Regards,
Direct submission to Outerzone.
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User commentsHi Mary /Steve - yet again another photo, my old Sunbeam, built winter 1979/80 [more pics 003]. It used to have a Cox Pee Wee on it at the time, made a few flights. Just now I converted it to 3ch radio with a small brushless motor. Its 1st flight showed a major disfunction to do something as simple as just that. Tried a few times more, its pattern was uncontrollable and making me feel "Oh wow, a challenge to sort this out to fly", which was not what I intended at all - hoped for a ready-to-go fun thing. But on the photo looks good though :)
Anon - 25/07/2017
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