Tipsy Junior (oz3949)

 

Tipsy Junior (oz3949) by Aubrey Kochman from Air Trails 1949 - plan thumbnail

About this Plan

Tipsy Junior. Control line scale stunt model.

Quote: "Scale? Roger! A good stunter? You betcha! Takes McCoy, OK, Bantam 19, even .29 motors. Tipsy Junior, by Aubrey Kochman.

HOW many times at a control-line stunt contest have you heard the expression - It sure does everything in the book, but it doesn't look like an airplane to me. Or - It's a beautiful model but I'd hate to see it crack up, it sure must have taken plenty of time to build!

With these thoughts in mind, I set out to find a model that would be a perfect scale model, or as near to scale as practical, a good stunt ship and a cinch to build. Things didn't look too well until I ran across the Tipsy Junior. It looked like the answer, and after carefully scaling up the plans, I found that this definitely was an ideal stunt model.

The Tipsy was designed by OE Tips who has been associated with the design of successful light aircraft since the middle thirties. The registration letters show that the airplane was licensed in Belgium. It is an ultra-light aircraft, having for a power plant a 60-hp four-cylinder, inline, inverted, air-cooled Walter Mikron, while another version is fitted with a 36-hp JAP horizontally opposed twin-cylinder engine.

The model as presented here was scaled up from the three-views to a size that would take a Bantam or McCoy 19 fully enclosed, except for the glow plug, and have good performance with either engine. A Bantam powers the model shown and construction was planned to keep the weight to a minimum without sacrificing strength. Choose your wood with this thought uppermost and you should have little trouble in keeping the weight to about 15 ounces.

If you like to fly control-line with models that look like the real thing and yet are not too fussy about exact scale, engines like the Ohlsson 23 or 29, McCoy 29 or OK 29 may be used if the nose of the model is widened just enough to take the engine and the cylinder head is allowed to protrude either in an upright or inverted position.

To begin construction you will first have to scale up the drawings. Better still, order a set of full size plans from Air Trails. In either case start by laying out the two sides on sheets of quarter-grained balsa 3/32 x 2 x 21 in. Check both the top and side' views when doing this as you will lose almost 1/2 in in fuselage length if you work only from the side view. With the two sides cut to shape, cement the 3/32 square longerons and uprights directly on to the sides.

Next cut through the longerons and lightly score the sides at the points in the fuselage where, seen from the top view, it bends sharp-ly just forward of the cockpit at former 4 and again at former 3. Apply glue at these breaks and start cementing in the cross braces..."

Quote: "Here are the plans and mag pages for a tipsy Junior controline plane from 1949 I am planning to build one of these for my Bantam 19."

Direct submission to Outerzone.

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Tipsy Junior (oz3949) by Aubrey Kochman from Air Trails 1949 - model pic

Datafile:
  • (oz3949)
    Tipsy Junior
    by Aubrey Kochman
    from Air Trails
    October 1949 
    30in span
    Scale IC C/L LowWing Civil
    all formers complete :)
    got article :)
  • Submitted: 25/01/2013
    Filesize: 350KB
    Format: • PDFbitmap
    Credit*: MikeNelson

ScaleType:
  • Avions_Fairey_Junior | help
    see Wikipedia | search Outerzone


    ScaleType: This (oz3949) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

    If we got this right, you now have a couple of direct links (above) to 1. see the Wikipedia page, and 2. search Oz for more plans of this type. If we didn't, then see below.


    Notes:
    ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/Avions_Fairey_Junior
    Wikipedia page addresses may well change over time.
    For more obscure types, there currently will be no Wiki page found. We tag these cases as ScaleType = NotFound. These will change over time.
    Corrections? Use the correction form to tell us the new/better ScaleType link we should be using. Thanks.

Tipsy Junior (oz3949) by Aubrey Kochman from Air Trails 1949 - pic 003.jpg
003.jpg
Tipsy Junior (oz3949) by Aubrey Kochman from Air Trails 1949 - pic 004.jpg
004.jpg

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User comments

Tipsy Junior, built from Air Trails plans, Webra Mach I engine, (1954) [more pics 003, 004].
JesusAbellan - 27/02/2017
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* 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.

Scaling

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.

 

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