Upstart (oz2222)


Upstart (oz2222) by George Woolls 1954 - plan thumbnail

About this Plan

Upstart. Lightweight rubber FF model. Aeromodeller August 1954.

Quote: "UPSTART was developed to the specification:

1. Simplicity to enable easy reproduction and repair.
2. Positive adjustment to ensure consistent performance.
3. High power and low drag for fast, high climb.
4. Low wing loading for good glide.

Most of the considerable development which has taken place since the original design was flown has been due to insistence on items 1 and 2, and has resulted in the standardisation of the laminated single-blade folding adjustable pitch airscrew with pretensioned motor. The use of the mechanical tensioner usually associated with folding airscrews inevitably results in difficulty of getting the motor to stop with an even row of knots every time in order to ensure constant CG position. A pretensioned motor of reasonable length does not suffer from such a possibility of CG shift.

Some four copies of the finalised design presented here have been built to replace those lost OOS and all show identical flying characteristics. Flight pattern is a fast steep right spiral climb with a fairly tight turn on glide.

Fuselage and Wing Mounting. Having assembled the fuselage, a slot is cut out in the top longeron to take the wing mount. It is a good idea to drill a series of 1/16in dia holes through the longeron from corner to corner, and then join them by means of a small abra-file to form a slot. Chamfer off the front spacers - 1/16 in on port side - in plan view to give sidethrust only, before adding ply or celluloid facing..."

Update 01/03/2018: added article, thanks to RFJ.

Supplementary file notes



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