No more propeller

[aviatoreb]

3 hours ago, Jim Peace said:

The weakest force in the universe is gravity and we really do not know what it is. And we spend hundreds of thousands of dollars in our hobby trying to defy it. 

Really no point in what I wrote. I was actually just laying in bed trying to figure out how everything I thought I knew about the orbits of electrons is wrong. There is no orbit and they now can sometimes theoretically visit the nucleus. 

Time to go burn some avgas. 

It's true - gravity is a very very weak force as compared to the other three and what you say is literally true, weakest (by far) of the other three forces in the universe.

But in reality it is the strongest force because the others have funny quirks associated with them that each case them to be almost entirely irrelevant on the time and spatial scales that we live.  Easiest to describe this is the em forces - very strong - imagine a whole earth that were positively charged and you were negatively charged what would happen!!!  But that never happens - you tend to get mostly even amounts of each charge and mostly they cancel out on the large scale.  So gravity however mostly adds and you get massive gravity forces from massive bodies collectively adding together minute forces to build something massive like a star, a galaxy, a super cluster, that meaningfully  tugs on us from light years away.

That and a full tank of avgas will get you to Oshkosh.

[salty]

Nearly silent because it produces nearly no power. 

To  move an equivalent mass to an equivalent speed by moving air will require moving an equivalent amount of air. 

Good luck with that. 

Edited November 30, 2018 by salty

[steingar]

I wonder if any of the brainiacs who made that thing have ever heard of inverse square laws or Reynold's Numbers.

[aviatoreb]

44 minutes ago, steingar said:

I wonder if any of the brainiacs who made that thing have ever heard of inverse square laws or Reynold's Numbers.

...I bet they have.