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Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
im trying to explain why some configurations are better/different than others. Im not expectig others to do my homework, but i do need some others here on the forum to advise me on such matters as the math a physics.
now, having built and operated several bicopters, ive seen different behavior from there different dimensions and applied forces. Fore most the tilter is now the focus of my curiosity. It seems to me the higher in elevation the pivot point is above the CoG, the greater the torque applied to the CoG. and that if the pivot and CoG are at the same elevation, then there would be zero torque? is this right?
so in the above pic, is increasing the vertical distance, equivelent to increasing a levers' length?
Registered Member #2431
Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639
Im going to use this thread as my scratch pad, to "do my homework" so to speak. any one with interest or something to add please jump in and say so.
ok looking at my physics text book, im seeing:
After reviewing the above and adding washers and screwdriver bits to the end of a rod i immediately found my machine would hover easily, though its not perfect yet. the specifics are diagrammed below.
if i did this math right for the above pic, this explians why i have more control now, then before. When i had less than 10% of this number and it was wickedly unstable.
ive come up with I = 0.028kgm^2 for the "sort-of" stable hover, i think i need to double it, but how? adding useless steel and lead to a aircraft or spacecraft should be seen as appalling and barbaric... So, ill use the battery, whose math and diagram follows.
the length matters a whole hell of a lot more than mass.
ill try this next, but im exceeding the dimensions and wise use of mass, 110g of useless mass isnt good engineering. a horizontal tail surface could be arranged though...
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Force Diagram of a Bicopter Tilter.
