Here in Slovakia we've been flying the „Twin-Flight“ competition for about seven years. The working time is 15 minutes and you have to climb to a certain height, fly for 5 min, land exactly on the spot and then repeat it once again. We don't measure the motor running time. Models with a weaker motor climb 1-2 min, with a stronger motor 20-30 sec (it depends on the pilot's will). A timekeeper puts a small pin on the spot of the first landing and the model can take off for the second flight immediately. The accu is not changed. The competition is called F5B-Formel Tatry or F5B-TA3. According to our rules they also fly in Hungary.

Despite that it seems to me that the F5J rules have a bigger hope of being accepted in other countries. I can see their weak side only in the fact that the winners are mainly big models with strong motors. The piloting skills are not that important. You yourself have found out that in 40 seconds the model can climb up to 320-450m. In order to see it there the model must be big. If it is big then it has no problems to fly 10 minutes from this height. At these heights the thermals are frequent and strong.
If we want to prevent this category from separating from ordinary modellers and becoming the property of a small group of rich modellers only, we have to get the models to a lower height. There the good pilots can show their mastership. In lower heights we won't need big models. Smaller models won't need strong and expensive motors...

It can be done in such a way that we divide the motor running time (40 sec for 7 cells) into two intervals lasting 20 seconds each. Gliding will have to last at least 6 minutes and 40 seconds (total flying time with the 20 seconds for climbing will be 7 minutes). Because you can fly 5 min without thermals as well...All this could be done in the working time of 2 x 7 with a break of 1 min between the first and second flight (so that also the pilots who fly longer than 7 minutes can land and get ready for the second start).
The maximum score will be 400 points for 6 min and 40 seconds ( one point for each second) and 100 points for exact landing. The maximum score for two flights will be 400+100 and 400+100 – that is 1000 points. These rules could work really well.

The competition would favour good pilots and the models would be closer to the eyes of the spectators. By the position of the model the synchronous starts would enable to see how individual pilots are doing in the competition and what their chances of a good result are... So my opinion on the results of your attempts is very similar to your opinion.

Together let's try to do something for our ideas to make it into the rules.

Today morning I tested the idea of 6+6 min F5J flight with Alti2. The weather was calm, no thermals.
I fly first flight 12 min (6 + 6 min), then I landed for a moment and made another 6 + 6 min flight.

First flight was an easy max time. I did not charge between the flights, this is why the plane did not climb so well in the second 12 min flight, I did not make a max time. In the first 6 min period, I landed 12 seconds short and started again at 6 min. The second 6 min period was almost 1 min short.

My Silver X climbs 11.3 m/s with AXI 2820/10 and Aeronaut 14x9 propeller. Glide is about -0.5 m/s. Everything is standard, no modifications.

I really like the 6 + 6 min flying style. It would be nice to try it in a competition. My idea is that one does not have to land. If one cannot make the first 6 minutes, he can start to the second period if he lands in the landing circle (15 meters).

What do you think of this?

Something for Tuomo Kokkonen from Finland. If you are in the phase of writing the rules for F5J, please look thise rules. They are in english and very top to date. I can also say with very good view for the future.

http://www.maaa.asn.au/electric/rules/f5j.htm

Look at this sentence. F5J event is designed to emulate the FAI F3J glider event except using electric power to launch the model instead of a hand tow.

*You have 10minutes in preivent and 15minutes in flyoff (working time)
*for motor 60s,40s,20s depend of class (launch window)
*gliding time only is counted towards flight score

This will answer on your problem with how many second for motor. Motor is only used insted of hand tow or winch. You can use it for 60s,40s,20s depend of class. But in final score only gliding time is counted. So in practice the best flyer will use motor for little as possible.