Tethered Trainer (oz5719)
About this Plan
Tethered Trainer. Control line trainer from 1944.
Quote: "THERE has long been a definite need for a beginner's control-line model. Too often have enthusiastic beginners entered this new phase of model building with complicated 100-mph-plus clipped-wing super jobs, only to be discouraged when models were reduced to scrap after the first few flights.
With this in mind, the Tethered Trainer was designed expressly to fit the needs of those builders who are just entering the 'controlled' field. Not even the greenest beginner will find difficulty in handling this tethered trainer, as efficient proportions and size make stability inherent. A happy combination of good looks and simplicity enable any beginner to be considered on the same par as more advanced guideliners.
Powered by motors of .19 - .23 cubic inch displacement, the Tethered Trainer zips around the course fast enough to perform any stunt but a snap roll. When the motor cuts, this model assumes a normal glide, thus saving on both props and nerves. This construction would be strong even with balsa, but with hardwood the trainer is practically crashproof!
Are you the type that wants to advance until you are capable of handling 'hot' jobs for tethered speed meets, or do you just want to fly a highly maneuverable job that is stable enough to fly safely and yet which will perform at speeds that are 'sporty'? We've anticipated either category. The mounts are flexible enough to fit most large-bore motors. (Mounts may be made to fit individual crankcases merely by widening the top view.) By Just substituting a Bunch Tiger or motor of similar displacement, speeds of from sixty to seventy miles per hour may be obtained with the other characteristics of the lower-powered version still retained. If you want 'superspeed' for speed contests, you may graduate until you own one of the hottest little spin-dizzies that ever entered a contest merely by clipping half of the area off the wings, substituting a retractable landing gear and adding a Hornet or Super Cyclone to do the work up front. No matter what you expect in a U-control job, you will want to build the Tethered Trainer.
Construction. The construction is so simple that the photos and plans practically speak for themselves. However, you may want a few pointers in the use of hardwoods. Practically any hardwood will do, but for the sake of nicked and blistered fingers, to say nothing of sore tempers, we would suggest selecting a variety of wood that is easily carved. We have found that white pine, sugar pine, bass wood, cedar and spruce are excellent for this purpose. If you are one of these balsa hoarders, you may use balsa, but you should enlarge wood sizes proportionately.
For most cutting purposes razor blades are out of the question. A good sharp fish knife or pocket knife will do. A little coping saw will be handy for cutting out tail and tip outlines, et cetera, and a small plane will prove invaluable for cutting..."
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Supplementary file notes
Article, thanks to gthunter.
Printwood scans, thanks to JJ.
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User commentsSome pictures of my finished Tethered Trainer, engine is a 60 years old Forster .31 glow [more pics 006-008]. Regards.
Jef - 15/08/2016
This was built by my Dad, Ivan Hickman, when I was still in diapers back in 1944. I believe it is a Tethered Trainer [more pics 009, 010].
MikeHickman - 04/09/2017
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