Talon Zephyr (oz10579)
About this Plan
Talon Zephyr. Radio control pylon racer delta model, for .15 engine.
Quote: "Witnesses to 'Talon Zephyr' flights at the '62 Nats all agreed that it was the fastest ship entered in the Pylon event. The belief that the Delta configuration is best for speed was widely expressed. For the benefit of those who have expressed a desire to build a .15-size ship, the plans are presented herewith. Should you have no interest in pylon flying and want only a high performance aircraft, the Talon Zephyr will still meet your needs. The craft will climb out of sight vertically since thrust can exceed weight.
Bob and I had built many deltas before we began plans for our 1960 model. We had worked together in his basement for many an evening incorporating the best features our previous ships into the design.
Bob began construction immediately, but prior to completion of mine, I had heard of the new Tee Dee .15 and decided that this one would be built around that engine. Some delay ensued while I laid out plans for the little ship, but construction proved simple, and my craft was ready to fly before the Hustler (oz2873) was completed. Having used Talon zippers, at Bob's suggestion, I called it the 'Talon Special'. The Special was destined to a short life.
On the first flight excessive up trim resulted in too much altitude too fast. A prolonged dive to bring it back resulted in too much speed and the point at which vibration found the right aileron reed was soon reached. Surprisingly, the ship was not damaged beyond repair, but since construction is simple, I decided to build anew.
The phenomenal climb of Talon Special sparked a thought which was to be used in the new ship - VTO. Considerable weight can be saved by eliminating the landing gear. Talon Special tipped the scales at three pounds. I figured that without the gear, and with lighter equipment, the ship could be flown at 2 pounds even. The Special flew with three servos, one being used for elevator trim, but it was decided to use only two in the Zephyr.
The receiver posed a problem until the Toledo R/C conference in February '62. While there, I saw the New Haven Superhet 10 channel. Immediately on returning home I wrote Jack Fisher and explained my problem, emphasizing the fact that I was concerned about vibration. He assured me that there would be no troubles..."
Article is online at http://www.airplanesandrockets.com/airplanes/talon-zephyr-1963-annual-edition-am.htm
Note this is drawing is scan from the full size plan, at 400 dpi. This is not scaled up from the small magazine print.
Direct submission to Outerzone.
Did we get something wrong with these details about this plan (especially the datafile)?
That happens sometimes. You can help us fix it.
Add a correction
Do you have a photo you'd like to submit for this page? Then email email@example.com
User commentsNo comments yet for this plan. Got something to say about this one?
Add a comment
* 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.
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.
© Outerzone, 2011-2021.
All content is free to download for personal use.
For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.
Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.