Recent content by twasnow

How is your equation not about plane efficiency it is using aircraft speed what if the propeller he is talking about is in a fan, or say a pump...[edited]

Oh and one other thing Mr. perfect, your calculation there provides the efficiency of a plane getting from point A to point B, Not the propeller efficiency.

Sorry, I have mis-spoke, While thrust is a force, without any motion there is no work being performed, if there is no work there is 0 efficiency so long as you are putting in ANY power. So to correct, I assumed that by "I have thrust of the propeller" he meant, I have the thrust power, and...

Thrust is power and it is expressed as either Jules / Second, horsepower, Foot-pounds / Second, or of course Watts. all of these are easily convertible.

convert thrust to watts (or any standardized unit of energy), motor output power is motor input power times efficiency, convert to the same standardized unit, Then thrust power divided by motor output power, and you have your propeller efficiency

oops double post

well certainly fine motor skills are useful for school, being able to prototype boards. But in the work place you will rarely get your hands dirty with a solder. There is no reason to not enter into mechatronics due to jittery hands, Robotics is my absolute favourite subject and I personally...

I am so glad I have no need to remember any of this. my computer does all the calculations for me :)

Depends on the size of the rock, but due to inertia you are better off pushing it gently... if you wouldn't kick a large rock hung by a string on earth, than you don't want to kick it in space. the fact is for the purposes of this demonstration gravity has no effect on lateral movement...

Okay, I don't understand why no one knows this, it's not a bad question but the answers given were CRAP. I will start with a material having color (or black). This is the property of mater to absorb some spectrum of light, but reflect others. The reason this happens is due to the inherent...