I had both knees done at the same time, it was not a pleasant summer but it's amazing how much better I feel 6 months later. Great to be moving pain free again, Thanks
I was going to ask you about your knee also. Someone did it before I did. I'm glad you're doing better. Anyhow, great to have you back Bruce. By the way that balancing hand saying goodbye.... I thought it was awesome.
Interesting that the electric plane changes the center of mass as the centrifugal force increases in unequal proportion because the masses are at unequal distances from the center of balance. There's also an interesting problem in that the masses being at different masses are different weights from each other. (force * distance = toque). The torque changes with rotation.
Greetings from Mexico. Great videos, great lessons but most important is the LOVE and the PASSION you put in every project. If we all had the same passion, the world would be a better place. My respect, maestro!
Excellent video! Thanks for even more ideas! I am in the process of making prototype balancing toys as making projects for my school's Science and Technology departments and will pass the link to this to the relevant teachers too.
8:42 Most interesting moment - When the plane gets going with enough momentum the battery swings up and the plane get's pushed down. What is going on!?! I think...that it has something to do with the fact that the instantaneous linear momentum of the battery and the instantaneous linear momentum of the plane are at different heights placing them each above and below the center of mass there is a torque created. Once the mass of the airplane and the battery rotating in line with - at a plane the same height as - the center of mass everything balances out again. Or nearly if it weren't for gravity since the pivot point starts out above the center of mass the position of the center of mass gets displaced from plumb a bit so probably the whole thing processes a bit as well while rotating.
Or... the upper cylindrical surface of the battery (along with the flat bottom of the case) forms an "airfoil" and creates vertical lift. This causes the battery to rise. ;-) OK... OK, at these speeds the lift is probably in the micro-Newtons. But it sounds cool.
Still having some audio distortion on the intro unfortunately. I think it would be worthwhile to discuss why this does work if the wire is shaped like a ^, but not if it's shaped like a v. In other words, why does this not work if the masses are above the contact point?
I know the audio continues to be a problem, this was shot with older equipment, not sure if it's the equipment or me, good news is that I've updated my equipment so we'll see. Good idea on the mass above the contact point, I have another set of toys that I will tackle down the road, including a high wire bike rider, I will make a note to tackle this then.
@waterrocketsrule If I'm getting this right, you can only comment on people's videos if you have similar videos on your own channel? And my unrealED video doesn't count as educational because you said so?
With the battery operated plane you could see how the center of gravity changed with the increased motion of the plane and the battery lifted with the increase of speed! Same with the bees spiralling as they decreased the rotation increased due to the weight of the bees down the incline. Pretty cool stuff! Thanks for the cool video.
It's interesting to see how the motorized airplane tilts downward due to the centripetal force from the battery end. I wonder how it would perform if the battery was moved to be level with the airplane.
@@YeanyScience I'm Glad to hear you are doing well. They have Mr. Simon in your classroom now and Mr. Metzgar moved upstairs and Mrs. Mohn is in his old room. Iv'e had a rough year since I lost my dad to brain cancer back in January.
