SEN 2147

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Table of Contents – SEN 2147

  1. In the press –
  2. Retro FF video
  3. Tangent part 1
  4. More on winding
  5. Nevada Scuttlebutt

In the Press
In the latest Model Aviation an article on the Fab Feb Contests by Don Deloach.  Great article, cover photo of Kathy Burford, quotes from international sportmen and photos.

Retro FF video
https://www.youtube.com/watch?v=In921Qx5FlQ&app=desktop. Recently appear on the (you)  tube but filmed in the 70s or 80s ?

2016 TANGENT CLASSIC
FAI MEET
AUGUST 19th 2016 F1 ABC& P
AUGUST 20th 2016 F1 GHJ&Q
THE SAME WEEKEND AS THE NWFF CHAMPS
FOLLOW THE SIGNS TO THIS YEAR’S FIELD SOUTH OF ALBANY, OR.


AMERICA’S CUP POINTS
Wayne Drake Perpetual Trophy for high time F1 A

F1 ABC&P FRIDAY AUG 19th,  7 ONE HOUR ROUNDS ON THE HOUR BEGINNING AT 8AM.  FLY OFFS TO FOLLOW

F1  GHJ&Q SATURDAY AUG 20th ,  5 One Hour & 30 MINUTE ROUNDS  BEGINNING AT 7:30AM.  FLY OFFS TO FOLLOW

(Additional round time to fly both mini contests
ENTRY:  $20 F1 ABC…$10 F1 GHJPQ, Jr’s Free
Prizes:  Glass, Points only for P, Q, & J based on Historic Entry Levels
 
CD’s:          RON MCBURNETT 503-551-3173
mail  acmeaero@msn.com

No Moto Flapping Allowed
Contestants must adhere to field/retrieval rules or face disqualification from the meet.

Last Comments on Powered winding from FB

Chris Edge Well I would agree but others have written that they like the thrill of the chase with the rubber. It’s so nice the FF is not always about the same thing. Some prefer the building and finishing, others the flight, some the chance to win. And now some like the twisting of the gummi. Good points elsewhere in Rogers fine organ. But where is Aram ? CHE
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David Ackery
 In the simplest analysis winding a rubber motor is dependent on two basic things, 1) torque and 2) turns, but also very important is the stretch.
How far, and how hard the rubber is stretched, and the tension this creates.
Then as we wind, both the tension, and the torque will change, and we will reduce the stretch (walk in) as we note these changes.
This relationship and change is not linear, or even some curve that is easily defined.
(And of course the rubber is also a variable; and a natural material.)

Indoor fliers do the same as they wind, but the tension, and torque are much lower that a Wakefield motor. So indoor fliers may physically touch or even massage the motor to understand by touch just where the motor it is up to.

Learning to wind a motor is an important and essential skill for rubber fliers, and the complex variables involved help to make it both challenging, and interesting.
We need to retain these things that make our sport unique, challenging and interesting.
That mix of art and engineering is the part of the essence of Free Flight, (an essence not found in other forms of model flying).

Kevin Lamers What bothers me is the general idea of people that, although rubber winding is an extremely complex physical process, humans are considered better in sensing and controlling all variables involved compared to machines. Like we always wind our motors to 99.9% of the maximum without breaking. Talking for myself I know I am far from that good.
So yes, winding by machine is extremely difficult to get consistent, but I doubt it will be worse than doing it by hand.

An editorial Observation …
.. For powered winding to work you need to know something about themotor you are using.  Judging by some comments I’ve heard on the field for some people a much better time and technology investment would be doing more rubber testing before putting that unknowwn motor in the airplane

Nevada Scuttlebutt

Looks like Mike Richardson and Ton Ioerger will be taking over the late October FAI event at El Dorado Dry Lake Boulder City, Nevada. Not far from Las Vegas for those so inclined.

Dates are October 29 and 30.
………………..
Roger Morrell