in case someone is interested in learning more about how their motors perform, and calculate their parameters, am enclosing link from the master. this helped me a lot to understand and learn more about my motors, props-you name it. here is the link: https://www.rcgroups.com/forums/showthread.php?t=185271
he also provided a simplified way:
http://flbeagle.rchomepage.com/resea...per_ver_02.pdf.
lots to do and learn during these cold and windy days (months?).
just get some test equipment and learn and have fun!

back to 'paper' airplanes. now on my final chapter (there are some in between that i have to add later), i find myself dealing with paper airplanes (thin foam, that is), just as i started, many years ago. as you know, i like small, slow, easy to fly planes that fly by themselves, free flight style, so when i watched a sukhoi flying at the gym and began to nose in the threads, i realized that it had the components that i needed for the ultimate backyard plane of my dreams. i had some thin foam that i got from kenway years ago, so i took it and developed another Elf, using the innards of the suk. it was a 'paper' plane (1mm foam) that i could fly at my backyard, and i also could control it so it didn't fly away. beyond my wildest dream! then, as there is a narrow walkway at the edge of the backyard, i began practicing take-offs and landings. so, compared to my early paper planes, that i could fly only once, and just watch them gliding down from my balcony, this was more than i could ask for. as i said before, we are living beyond science-fiction. safe 2.4, lithium, geared micro-motors, foam, (and all so cheap), are things that we could not even dream-of a few years ago. and so many things to experiment. welcome to fantasyland.
then i decided to get another system for another plane. by then, they had released the 4site, so i got 1, but before i removed all, i tried the plane at our grass field, but it was a handful. am not an advanced pilot, and i was not having fun, so...Continue Reading