Digifli - plan thumbnail image

Digifli - completed model photo

by Dick Smith, Ed Thompson
from RCMplans (ref:170)
May 1966 
48in span
Tags: R/C LowWing
all formers complete :)
got article :)

This plan was found online 27/07/2017 at: https://www.rcgroups.com/forums/showpost.php?p=37986582&postcount=7263
Outerzone planID: oz9028 | Filesize: 431KB | Format: • PDFbitmap | Credit*: davidterrell80, hogal


About this Plan

Digifli - Radio control sport model. Supertigre .40 R/C shown.

Quote: "Preface by Ed Thompson.

AS I mentioned in a previous issue, Dick Smith and I cooperated on an airplane designed for the Digitrio. This craft evolved in order to take advantage of the Digitrio's small physical size, low weight, and infinite control. For beginners, I recommend that they have a veteran flyer available for preliminary flight tests and for general assistance. The tyro should also use a 'hot' .23 and balance the plane slightly nose heavy from the CG shown on the plans. With a hot .35 or .40 this plane is a screaming demon and will require the full-time efforts of the pilot for best results!

Although the Digifli is very fast, the biggest item which will require your attention is its 'quickness.' If you do not know the difference between 'fast' and 'quick' you will find out when you put this bombshell in the air!

The contest ability of the Digifli will depend upon the individual pilot. A successful pattern airplane has, for the most part, fallen into the large, smooth, docile type. While this plane is docile in the attitudes you may place it, it will not do the flying for you. In other words, here is a plane that you will have to fly, and its performance will be measured by the pilot's proficiency. Although we have not flown this plane on reeds, I shudder to think what the outcome might be with a .40 up front! If you have ever felt inadequate while flying one of the current crop of free-flight reed ships with a digital system, now is your chance to step into the picture and feel like a pilot!

There have been many books written on model aircraft design, theory, and practice, none of which were used on the Digifli! Regardless of what methods are used in the design of an R/C airplane, in the final analysis a good ship is one that pleases the owner, and this airplane really 'turns me on!' The airfoil is a S-T Special, or as a lot of designers say when they cannot think of a better answer - a highly modified Clark-Y. Dick Smith did all of the actual construction work on the aircraft and is responsible for its excellent appearance. He is quite a designer and deserves the lion's share of the credit for the Digifli..."

Update 08/08/2017: Added PDFvector plan tracing, thanks to hogal.

Supplementary files

Article pages, thanks to hlsat, JHatton.
PDFvector plan tracing.


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User comments

Proportional radio control apparatus was a dream for most of the modellers because at the period it cost about 4 x salary or half a small car. RCM started a project to made the dream come true, and after the series of articles they compiled them into a booklet.
Pit - 16/08/2017
Thanks to Pit, we've added the RCM Digitrio Construction Manual to our sister site, RCLibrary. It's a compilation of all the RCM articles about the Digitrio Proportional System, which was designed and developed by the magazine's Technical Editor, Ed Thompson.
Mary - 16/08/2017
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