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Archive for November, 2017
Posted by phil alvirez | Nov 16, 2017 @ 04:59 AM | 6,169 Views
learned about these cells for umx planes similar to the radian:
https://micro-motor-warehouse.com/co...eid=4db1759bcc
eventually finished performing tests on these batteries. just in time for fall to arrive with winds and rain
i used the hobby king nano cells for comparison https://hobbyking.com/en_us/turnigy-...kzone-etc.html
1st did bench tests using a umxradian and running the motor at half throttle (stick vertical) while holding the plane on my hand, and stopping every 30 seconds and taking readings of the voltage remaining.
umx radian: https://www.rcgroups.com/forums/show...0mm-Version%29
i used the hobby king cell 160 mah as a point of comparison:
https://hobbyking.com/en_us/turnigy-...kzone-etc.html
and the 1st 1 from micro motor is this: https://micro-motor-warehouse.com/co.../mylipo-150mah
the way i did the bench tests was installing the cell in the umx radian and run the motor at half throttle (stick vertical) for 30 seconds, stop and measure volts. then again. until reached the minimum recommended.
time and volts
seconds--------30------60------90-----120------150-------180-------210-----240------270------300-------330------360-----390------420---450---480
1: hk 160-----405----395----389-----384------380-------377-------374-----371------368------365-------359------345
2-150/25c----408----396----391-----385------381-------378-------375------373------369-----365-------353------312
3-150/45c----409----399----393-----388------383-------379-------377------373----...Continue Reading
Posted by phil alvirez | Nov 05, 2017 @ 10:38 AM | 5,724 Views
there is a point in life-and in modeling-that, as Kenny Rogers in the song, you need to know when to run.
once you have reached certain goal, or when you are satisfied with what you have or do, why try something else?
or when you no longer can do something, or dont enjoy doing it anymore

Kenny Rogers - The Gambler (2 min 54 sec)


https://www.azlyrics.com/lyrics/kenn...hegambler.html

i have reached a point where i cant find anything else to learn about modeling, or have anything to do but fly my planes.
and that is a great thing because, after all, the main goal of this hobby is flying-or whatever specialty you do-and enjoy your model.
so, life is good anyway.
Posted by phil alvirez | Nov 03, 2017 @ 08:01 PM | 5,786 Views
with early winter hitting, i am getting back to my den and paint (my other passion), instead of model airplanes, so will not hear much from me. and when spring is back (who knows when) will fly again, but still not much to talk or explore new things, as i already have everything i need for a long time, and too many planes ready to fly, so dont have an excuse to build another
so long folks
and thanks to all that have been so helpful
Posted by phil alvirez | Nov 01, 2017 @ 01:25 PM | 6,462 Views
we all are so accustomed to transistors, and could not live without them, but, what on earth are they?
there is an article at wiki: https://en.wikipedia.org/wiki/Transistor
but on it they say that: 'The term transistor was coined by John R. Pierce as a contraction of the term transresistance. '
on the other hand, national geographic provides another explanation that, to me, is more believable.
it was explained in the "100 scientific discoveries" issue/page 27: "This technology transfers current across a material that normally has high resistance (in other words, a resistor); hence, it is a transfer resistor, shortened to transistor."