Boeing Nearman. Free flight sport model. Wingspan 40 in, 30 oz all up weight.
A sorta-Stearman. This is a sport model, loosely modelled on the Boeing Stearman.
Quote: "For pure free flight fun, a 40 inch wingspan semi-scale sportster, designed for engines of about 1 cc. Ah, we can smell the diesel fuel now! Boing Nearman, by Peter Antram.
This model came about as a result of when my wife and I were passing Goodwood airfield as a biplane in a very attractive blue and yellow colour scheme drifted in to land. She commented that I ought to build one like that, so here it is!
This sports free-flight model is intended to give an impression of a Boeing Stearman PT-13 Kaydet, whilst staying relatively simple and sturdy. So there are, for example, no wing interplane struts, for the sake of that simpliciry!
Nearman has proved to be a good flyer and tough with it. If you wish to add struts, go for it, although our local field's hazards render them a liability. Use light but strong wood and the Boing will bounce - hence 'Boing' without the 'e' - and it is nearly a Stearman: 'Nearman'.
Make a 'kit' first. May I suggest a kit of part should be cut out (wood bits), and bent to shape (wire bits) which will allow the plan to be secutred and film protected without the need to disturb it for any reason once construction begins. I find sailplanes and fins tedious, so tend to construct them first so that they don't get rushed! The warren type ribs of the tailplane help fight warps and I tend to build the fin 'in the air', sanding the rectangular ribs to a streamline section when assembled. Keep it light and no 'church roof' should be needed up front later!
Wings. The wings are almost identical, the difference being in the shape of the centre section trailing edge, the cut-away being replaced with 3/8 in sheet. I build four wings and then join them with the ply joiners while propped up at the correct dihedral, then complete the centre section. But please, use your favourite method. The fully sheeted centre sections make it more difficult for fingers or cabane rails to poke holes - not impossible, just more difficult.
Fuselage. I suggest the fuselage construction is started by drilling the 3/8 x3/8 spruce engine bearers to suit your motor (the plan shows the DC Spitfire 1 cc used in the prototype). This motor, fitted with a Kavan 9 x 4 plastic prop, gave a pleasantly slow climb. A SLEC large free flight tank gores more than enough run time. You will have to adjust the bearer spacing to suit your motor if different type..."
Scan from DBHL, cleanup by theshadow.
Direct submission to Outerzone.
Update 22/11/2018: Added article, thanks to RFJ.
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