Chief (oz9)

 

Chief (oz9) by Bill Dean from Keil Kraft 1950 - plan thumbnail

About this Plan

KK Chief. A2 Nordic class towline glider. Wingspan 64 in, wing area 515 sq in.

Quote: "The CHIEF is an advanced contest design to the A-2 Nordic specification. Good looks combined with outstanding performance were the main object in mind when the model began to take shape on the drawing board. The features which were felt to be essential were as follows:

Plug-in wings, for ease of transport.
Knock-off-ability, in crashes.
Good lines.
A safe, reliable and easy to build dethermaliser.
An auto rudder, to ensure that whilst the model went up straight on the line, a turning flight would result when it was released.

These features are all to be found on the model, together with the structural strength necessary to stand up to the strains of towing up in all weathers.

In spite of the graceful contours, the construction of this plane has been kept as simple as possible. The basic framework is built up from 1/8in square - formers being added top and bottom. The only tools needed are a packet of steel pins, a pair of long nosed pliers, a fretsaw, sandpaper and plenty of razor blades. Use the single edge type or one of the more popular two edge type broken in half. A KK balsa knife is preferred to razor blades by many modellers and is certainly much safer.

Protect the plans by placing greaseproof paper over them. Cut out the sheet parts only as you need them - to avoid damage or loss. The back of an old hacksaw blade is useful as a straight edge when cutting along straight lines on the printed balsa sheets."

Added printwood formers, thanks to jfkitson.

Supplementary file notes

Formers, complete.
Instructions, 5 pages complete.

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Chief (oz9) by Bill Dean from Keil Kraft 1950 - model pic

Datafile:

Chief (oz9) by Bill Dean from Keil Kraft 1950 - pic 003.jpg
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Chief (oz9) by Bill Dean from Keil Kraft 1950 - pic 004.jpg
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Chief (oz9) by Bill Dean from Keil Kraft 1950 - pic 005.jpg
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User comments

The full instructions for the KK Chief are online here http://www.rcgroups.com/forums/showpost.php?p=11292336&postcount=19 posted by patmcc.
SteveWMD - 01/12/2012
I built this Chief from a kit by The Vintage Model Company [more pics 004]. Specifications: New weight: 31oz ( free flight original 14 1/2oz). Wing loading: 8.66oz/sqft, (free flight original 4.05oz/sqft). Still good. Motor: 960Kv 480 brushless outrunner. ESC: Eflite 30amp Pro. Propeller: 10x6 Graupner CAM Folding Prop. Receiver: Spektrum AR6115e Servos: Hitec HS65HB x 2, or similar. Battery: 2200mAh 11.1v 3S Li-Po. Covering: White Airspan (nose area covered with Solartex).
DavidWright - 03/12/2013
I lost a KK Chief from a place called 'The Coppice', which overlooked Accrington Stanley Football club. Must have been about 1958, and had taken me months to save up for. I was having trouble trimming her, so left the DT off. Got sucked away in a massive thermal, never to be seen again. Looks like I will be downloading the Chief from Outerzone over the next few months and having a go at bungee launching. RC of course.
MalcolmJ - 27/09/2016
My Keil Kraft Chief [more pics 004] has had a 'makeover'. Recovered in the scheme that I remember as a child from the Keil Kraft leaflet (which was in monochrome) [model photo & more pics 005].
DavidWright - 08/07/2019
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Notes

* Credit field

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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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