Nervensage (oz2915)

About this Plan

Nervensäge. Control line team racer. Model Aircraft January 1955, Nevensage 23.5" span international / class A team racer. Published in Model Aircraft January 1955. Plan shows ED 2.46 engine.

Quote: "The prototype of this model was designed in 1953 according to SMAE Class A rules, and won all contests in which it was entered. After the 8dm2 - 10cc - tank rule was formulated, the Nervensäge was re-designed to meet the new FAI formula for team races, and proved to be equally successful. Its contest record in 1954 showed first places in the eliminators for the German Nationals and a number of local contests, and a good second place in the 5th Criterion of Europe. In this contest it was beaten only by H. Longdot, Belgium, who used a reed-valve ED Racer, resulting in approximately double the lappage these disc-valve engines seem to be capable of with a 10 cc tank. It should be noted that by fitting a 15 cc tank instead of a 10 cc tank, the model then conforms to the SMAE formula for Class A team racers.

The Nervensage, meaning 'Nerve Saw' in English, has been flown mainly with the ED Racer, now equipped with a reed valve as well, but proved to be faster with a Webra Mach 1, though calling for an experienced mechanic in the latter case. Lappage with a normal engine is approximately 25 per tank, although with a properly matched flutter-valve, more than 40 laps should be possible with only two pit-stops during the to kilometre, 120-lap race.

Construction is quite straight-forward. Cut wing from medium balsa and sand down to airofoil section. The U/C should be firmly bound and cemented to the plywood former F2. Assemble fuselage main structure flat on plan, pinning engine bearers down with their ends slightly over the edge of the board to allow F3 to be cemented in between (top to bottom). Former 2 and hardwood spacer should now be cemented in. Allow to set firmly and cut fuselage sides in the meantime.

Fit wing between formers and secure with pins and scrap balsa, applying ample cement. Support wing under tips for proper rigging..."

Update 13/07/2013: Replaced this plan with a cleaned up version.

Supplementary file notes

Planfile includes article.

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