Hi Liner (oz7446)
About this Plan
Hi Liner. Free flight power model. All sheet design for .049 cu in. High thrust line design, uses Jedelsky wing construction.
Quote: "THE HI-LINER is a radical departure from the conventional free flight power design. Each of the unique features has grounds in theory and the innovations pay off handsomely where it counts - in performance. Both in the U.S. and on the European Continents, its climb when powered by the Holland Hornet .049 has been clearly superior to that of other models on the field.
The Very High Thrust Line (VHTL) model is now being tried by a few free flight exponents around the world The Hi-Liner, on the other hand, is a proven veteran of three contest seasons which has always shown good flight characteristics. Its unusual force arrangement utilizes a high motor position on a forward fin for maximum longitudinal and spiral stability. A small tailplane (15 per cent, of wing area) is combined with the long fuselage, and as both tailplane and rudder are positioned low, the power pattern is not unduly affected by turn adjustments. As all incidence is in the tailplane (-3 deg) with both the ultra-thin wing and motor at 0 deg, drag is quite low; in addition, these design features provide excellent transition from the 'straight up' climb to glide without tricky mechanical means of changing incidence. The low wing is positioned for a good glide, as the tailplane is out of its downwash.
Construction of the Hi-Liner is no less unusual. It is sturdy, resisting warps and punctures. In theory, the all-balsa flying surfaces are quite superior, providing a high lift, low drag airfoil absolutely true for their entire length. The Jedelsky construction method represents a major advance in a wing which embodies the results of research by the 'Vienna School' applicable now to power design because of improved VHTL force arrangement. Built up construction of such a thin, highly curved airfoil would be far too complex for most modellers; the Hi-Liner with its Jedelsky wing can be constructed by relatively new modellers who do careful work..."
Direct submission to Outerzone.
Update 04/02/2016: Replaced this plan with a clearer copy, scanned from fullsize print, thanks to DerickScott.
Supplementary file notes
Article page, text and pic. Also, previous scan version.
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User commentsAs requested on the 'Wanted' page. Many thanks to both RFJ and DerickScott for this.
SteveWMD - 04/02/2016
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