Iota. A 60inch span RC slope soarer or tow-line glider, for 2 function radio. Free plan with Aeromodeller, September 1986.
Quote: "Fancy some gentle slope-soaring or tow-line flying? Only a small field at your disposal? Don't worry - this 60 inch soarer is just the job, so turn to our full-size plan now! Iota, by Bryan Miller.
IOTA CAN BE FLOWN safely and successfully from quite small areas. It possesses good inherent stability and recovers quickly from large control inputs, and a superb floating glide enables precise landings to be made; indeed, Iota can be landed literally on a sixpence - or perhaps I should say tone pound coin' in modern parlance, and to allow for inflation. Many flights have been terminated with Iota being flown back to the operator and caught in the hand. It is equally happy flying from a towline or from a slope, will accommodate any of the 'cheap and cheerful' two-function 11/c sets currently available, and is inexpensive and quick to build. What more could you want?
Wing construction. Invariably I begin a model by cutting out the wing ribs with the aid of a thin plywood template shaped to the outline only. Iota's wing section is based on the Benedek 8535 B2 with increased undercamber at the rear, by the way. A stack of ribs for one wing half are held together with pins pushed in from both sides and the slots for the tapered mainspar and the rear spar are made with care. The spars themselves are from hard 3/32 in sheet balsa, cut (again, with care) using a sharp, stiff blade and a long metal straight-edge.
The three wingtip pieces are glued together directly over the plan (which is best protected by a thin polythene sheet overall). When removed, they are glued to the leading and trailing edges with a scrap piece of 1/8 in sheet used to support the middle ofthe tip. The front of the trailing edge is packed with pieces of 1/16 in sheet to allow for the undercamber. The rest of the wing is straightforward, although it is easier to fit the lower mainspars after the initial assembly has been removed from the building board and the wing joining tubes have been aligned.
To ensure that the wings do not move apart during flight, hooks are built into the underside of the sheeted centre section to enable a small rubber band to keep things tight. The hooks are recessed to prevent them from damaging other parts of the model during transit to and from the flying field.
Riblets strengthen the wings, improve the airflow and add to the appearance with very little weight penalty. They are quickly and easily cut from 1/16 in sheet with the aid of an appropriate template. Don't be tempted to omit them..."
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