ORIGINAL: Freddy
6 kg?.......no!
If we open that up the race for more power will continue.
5 kg + 1% tolerance we have now is perfect.
One really does not need more power than a YS170DZ.
Just keep challenging the manufacturers on how to get power out of smaller packages (glow, gas, electrical).
That is in line with current eco friendly green thinking and every bit helps save our planet.
Thank you FAI for keeping the sanity in F3A one of the best and longest standing rules ever written in Model Aviation.
The need for more power came when manufacturers started designing bigger aircraft. If you look back to the Oxai Pinnacle for example, the 160 DZ struggled to haul it around in all but good flying conditions.
This then necessitated the requirement for more powerful engines.
Maybe the physical size of the planes need to be limited somehow. Not the 2x2 rule, but fusealage size??