Tethered Trainer (oz5719)

 

Tethered Trainer (oz5719) by Earl Cayton from Air Trails Annual 1944 - plan thumbnail

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..."

Direct submission to Outerzone.

Supplementary file notes

Article, thanks to gthunter.
Printwood scans, thanks to JJ.

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Tethered Trainer (oz5719) by Earl Cayton from Air Trails Annual 1944 - model pic

Datafile:
  • (oz5719)
    Tethered Trainer
    by Earl Cayton
    from Air Trails Annual
    1944 
    36in span
    IC C/L LowWing
    all formers complete :)
    got article :)
  • Submitted: 10/07/2014
    Filesize: 1042KB
    Format: • PDFbitmap
    Credit*: JeffMac, JJ, gthunter

Tethered Trainer (oz5719) by Earl Cayton from Air Trails Annual 1944 - pic 003.jpg
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Tethered Trainer (oz5719) by Earl Cayton from Air Trails Annual 1944 - pic 004.jpg
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Tethered Trainer (oz5719) by Earl Cayton from Air Trails Annual 1944 - pic 005.jpg
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Tethered Trainer (oz5719) by Earl Cayton from Air Trails Annual 1944 - pic 006.jpg
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Tethered Trainer (oz5719) by Earl Cayton from Air Trails Annual 1944 - pic 007.jpg
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Tethered Trainer (oz5719) by Earl Cayton from Air Trails Annual 1944 - pic 008.jpg
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Tethered Trainer (oz5719) by Earl Cayton from Air Trails Annual 1944 - pic 009.jpg
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Tethered Trainer (oz5719) by Earl Cayton from Air Trails Annual 1944 - pic 010.jpg
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User comments

Some 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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  • Plan File Filesize: 1042KB Filename: Tethered_Trainer_oz5719.pdf
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  • Supplement Filesize: 78KB Filename: Tethered_Trainer_oz5719_printwood.pdf
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Notes

* 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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