Tee Nee Delta (oz7876)
About this Plan
Tee Nee Delta. Tethered flight delta model. For Cox .010 Tee Dee power.
Quote: "This pint size project should appeal to pint-size model builders, maybe some big ones too. Great for cold weather, grab your coat and set up an event. Tethered Terror. Tee Nee Delta, by Bruce Plecan
Tee Nee Delta spans 6 in and is our smallest flying model. Yes, the tips could be trimmed off flush with the rudders for a 4.5 in span. Or you could scale it down even smaller. But as shown she's a fairly sensible and very stable tethered miniature.
Tee-Nee is tethered via one wire to a pylon pole 15 to 18 in high (a common nail in the top acts as a pivot). Any loose fit washer on the nail provides anchorage for the tether line which if plain wire, is wrapped around the washer edge several turns then soldered. If stranded U-control wire is used (usually it's stainless steel) drill a hole in the edge of the washer and wrap several turns of it through the hole and around outer edge of washer and then coat with epoxy glue. Since the wire will tend to unravel clamp its free end in place (a small alligator clip will do). A second and third coat of epoxy is a must. We recommend epoxy because stainless steel is extremely hard to solder right.
It is imperative that both ends of the tether wire be looped back upon themselves and soldered or epoxied for a very strong joint. If you make a weak connection at the airplane end, you can very easily have a splatter flight! Pylon should have a 12 or 15 in square base (latter size preferable) since the centrifugal force of the fast-flying model is considerable. One one of our early flights, we had three pounds of bricks as ballast on our 10 x 12 in base which tipped over after one lap, ruining the flight. Luckily, only the prop and wing tips got worn down slightly as a result. We now use an auto jack as ballast (9 pounds) and we haven't had any more tipovers.
As to tether length, 8 or 10 feet is fine. We have flown on 5 ft lines, but your model is a mere blur. On 15 ft lines outdoors, Tee-Nee is affected by wind; she kites up into wind and drops on downwind side, leading to violent up-down oscillations that ultimately make a pretzel out of the LG strut. For the speed fans, a tether line of 8 ft 5 in is excellent..."
Hi Mary/Steve - Here is Bruce Plecan's Tee Nee Dee from American Modeler magazine issue Nov-Dec 1965.
Direct submission to Outerzone.
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User commentsThis was one of the issues I missed while off to boot camp with the USAF. I had several Cox 010 engines about this time, good running as long as you used the right fuel, mine ran on Fox Missile Mist, all castor and lots of nitro. The 010's had a lot more power than you might think, almost as much as a Pee Wee 020. Sometimes you can find one on Ebay, but you'll have to pay more than a new 61 RC. When I returned to a more normal existence, American Modeler had gone to hell. The slot car craze was gaining speed and the magazine devoted more and more of its print space to that segment, until ALL of it was slot cars, no aircraft at all. Slot tracks blossomed all over the country wherever there was enough space until the go-fast boys took hold and ruined it as they always do. If you wanted to compete, you had to send your cheap Mabuchi motor off to one of the gurus who would work his magic, rewinding and epoxying the windings, fitting ball bearings, etc. Once this happened, the slot car phenomenon died overnight, most tracks closed and model manufacturers who had converted to slot cars either disappeared or struggled back to making more mainstream products. American Modeler had lost ALL of its model airplane customers and quickly found themselves in big trouble. They re-named it American Aircraft Modeler in a vain attempt to survive, including under contract the AMA news section. But it wasn't enough and they bit the big one. The AMA took over a few of the remnants, beginning its own publication, Model Aviation. That's what happens when you chase a fad and ignore your long term customers.
DougSmith - 18/07/2016
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