Hi Liner (oz7446)


Hi Liner (oz7446) by Keith Hoover 1961 - plan thumbnail

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.


Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction

Hi Liner (oz7446) by Keith Hoover 1961 - model pic

  • (oz7446)
    Hi Liner
    by Keith Hoover
    from Aeromodeller
    July 1961 
    44in span
    IC F/F
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 29/01/2016
    Filesize: 629KB
    Format: • PDFbitmap
    Credit*: RFJ, DerickScott

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

As requested on the 'Wanted' page. Many thanks to both RFJ and DerickScott for this.
SteveWMD - 04/02/2016
Add a comment



Download File(s):


* Credit field

The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.


This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.


Terms of Use

© Outerzone, 2011-2022.

All content is free to download for personal use.

For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.

Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.