National Free Flight Society

SEN 3140

  1. Apology from the printer
  2. Using Neurones in a Fly-Off
  3. Who wrote it
  4. Filters also known as Chokes
  5. Follow it
  6. Electronic data recording
  7. Almost 90%

Apology from the printer

Sorry that the formatting of the last SEN got a little garfed up. Hope it did not get spam blocked for you

Using Neurone in a Fly-Off
From: Frederic Aberlenc

We have had a lot of questions since the World Championships about the use of the Neurone during fly-offs. So, here’s how to use it:

1-what should we do before the flight? Just show the Neurone serial number to the timekeeper before the fly-off. This number will be laser engraved on new units to avoid any changes.

2-What should we do after the flight? Collect the model, then, in front of the organizers, click on the “altimeter” button in the application. This displays the altimeter record of the flight, the UTC time of departure and landing as well as the corresponding GPS coordinates. The 2 points can be viewed in Google Map with a simple click.

3-Is it possible to cheat? This is impossible since the serial number of the Neurone as well as the start and end of flight times and GPS coordinates are displayed simultaneously.

4-how much time does the organizer spend reading the information? Reading is immediate. Checking the consistency of the information takes less than 10 seconds.

5-How can we help organizers process faster in the future? We can imagine that when the flight is read on the smartphone, the information is sent directly to the organizer or to a dedicated server. There are such systems for running where each organizer “creates” the competition first and then all the times are sent directly to this server.




Who wrote it

From: n batocanin
Hello Roger!

I am reading a very interesting text in SEN 3139. I didn’t understand the origin of that text, who wrote it?

Regards, NB

The part from the EDIC document was written by Ian Kaynes.  The other piece about how Onboard Flight Recording and more might be used was written by retired CIO and F1B sportsman, the editor


Filters also known as Chokes


I have a question about adding a filter to a system that uses one battery to power the timer and the GPS tracker.
The timers I use are the Fore Most E-TIMER and ADR. The GPS system is the PYXIS. I am using a 250mA battery for power.
I have had a couple of unexplained early DTs with my set up.  I want to add a filter to the system because I understand a filter could help prevent the early servo actuation. And yes, the battery is fully charged.
The question I have is where to put the filter, on the battery cable, the leads to the servo or some other location?
I’m sure there are experts out there who know the answer to my problem.
Paul Crowley


Be sure to send the suggestion to SEN as Paul is not the only person who wants to know

Follow itFrom Teppo Sarpila

I agree with Per. Specially following the Orgietering. More near to us is Soaring. Please look at  . It is nice to following the contests at home or in somewhere.  Also in following of Soaring is some problems, but it will be better all the time.
Teppo Sarpila


electronic data recording

From Edmund Liem

Hi Roger,
Not sure if this is of interest to our readers, if so, could you include this in the next issue of SEN.

The last WC in France has shown that it wasn’t easy to manage the competition with such a large amount of data on flights. The opinions on this topic are diverse. This is not unique to free-flight and I just saw a Youtube clip that shows similar issues when electronic aids are being widely introduced in professional sports. It is enlightening to see what has happened.

Edmund Liem

Almost 90%

From: Gary Madelin

Hi Roger. Gary Madelin here, GBR one time team member, now helper / supporter.

Some thoughts as a reply to Per:

“Having read the reflections from Per Findahl, following what was a really fab World Championships, I can agree with his thoughts almost 90%. Altimeters and data loggers are here to stay, for sure, and even as an old guy, I can see that, even if I struggle to understand how all this new stuff works. For me, there still needs to be a balance though, as free flight [correct me if I’m wrong] will never be a big spectator sport for the general public, but no harm in trying. For me as a free flighter, the whole spectacle of observing, round by round, at an event like the one we have just seen in France is beyond comparable. Agreed, sitting at home and watching online results ping up on your la-top screen in real time is great, but it’s just not the same as being there. As to timekeeping and rule changes, yes we need to move with technology, and old guys like me will need to adapt. But it does also need to be fair. I was lucky enough to be a timekeeper on F1b day at the Champs, an unforgettable day really. Just to be immersed in the action, activity, preparation and dedication of the teams, was not something you could imagine by looking at results on a computer screen. I first had the Swiss team, so well organized and prepared, all 240 sec maxes, then the team from Kazakhstan, what lovely people. Then the Danes and Norwegians – knew all of them, then after lunch, the Mongolian and Turkish teams followed finally by the USA team [knew all those guys as well]. All the rounds went well, with no issues. Come the fly-off, I was on a pole for a competitor who displayed to the three timekeepers his on board data logger. All new to me, but all made sense. His team Manager demonstrated the zero function, memory erased and all set. The flight was superb, I watched it down with very clear visual sight lines [the model had a bright red flasher] that was clear above the trees, below the power lines and then in front of the trees before going from sight below the top of the sunflower field. All three of us had slightly different times, but the team manager signed this off for the Contest Director to average. The final result gave the competitor 12 seconds more than the timekeeper’s average time, and moved him up five places, a consequence of the direct read-out from the data logger. So here we have the dilemma. Current rules are, as we timekeepers applied, “until the model lands, collides with an object, or disappears from sight, not to re-appear for ten more seconds”. For sure the model glided for the data logger time. The following morning on my way to the field, I looked carefully at the terrain, beyond the sunflower fields and the road, the land gently fell towards a small stream and the line of trees, so for sure it glided for the extra time.

So what to do? I think, for sure we will be adopting altimeters and data loggers going forward. The rule book will need re-drafting. But for me, having had that lovely day timekeeping F1b with the atmosphere all around will never be replaced by technology. I feel I’m doing something right, and have been for 60+ years. Although maybe I’m just a dinosaur?

Keep enjoying it though! Gary M.

No matter what technology is used or not not volunteers are always needed. Being on the spot beats being on the interweb … but we all can’t make to every  champs, … see you in Mongolia or Lost Hills