does a propeller screw itself on air or is it just reaction

[raaaid]

also its the coanda effect

imagine you had a vacuum cleaner that expelled that air it absorbs laterally and you aim it up

vacuum would propel you up

[AndyJWest]

Originally Posted by raaaid

vacuum would propel you up

Nope. The air pressure below would.

[raaaid]

yeah so when you open a window does heat leave or enter cold

this is interesting:

http://www.youtube.com/watch?v=MfZt1...ure=plpp_video

[Puppet]

Cold
noun

the relative absence of heat.

When you open a window and the outdoor temperature is lower than inside, the warm inside air (less dense) will escape and rise into the atmosphere until it has cooled to equal the temperature of the surrounding air. The cold outside air (more dense) will enter the window to replace the escaping warm air and subside into the room.

Why is there confusion here? And why the hell are we discussing this in the first place?

Edit: I have just reread the OP's posts. I am not entirely sure exactly what point this thread is intended to prove. Several lines appear to be incomprehensible, however this could be due to the punctuation and grammar.

Edit 2: Did he say he is an engineer?!

[bongodriver]

Edit 2: Did he say he is an engineer?!

He says he is alot of things.....you are obviously new to the raaaid phenomenon.

We are privileged to enjoy raaaid threads because it was voted on to keep his ramblings, apparently he is some kind of genius.

[Sternjaeger II]

yeah, this forum should be renamed "contrary mary"..

But I'm sure Raaaid will now show up and said "hey at least I post original stuff, not copy paste from other websites".

It's like arguing with a plant, although there's a fair chance the plant might actually agree at some point..

[winny]

Only Raaaaaaaid would ask if an airscrew screws..

It doesn't, all aircraft are kept moving by magic, everyone knows that.

Oh, and aliens.

Seriously tho raaid, I thought you were doing a degree in something nautical?

And you're asking how a propeller works?!

[GregHouse]

Originally Posted by raaaid

yeah so when you open a window does heat leave or enter cold

this is interesting:

Hey Raaid, this video is really interesting I would like to find more videos like that,are you scientist or sth????????

[Sternjaeger II]

Originally Posted by GregHouse

Hey Raaid, this video is really interesting I would like to find more videos like that,are you scientist or sth????????

[GregHouse]

Originally Posted by Sternjaeger II

i suppose its concidered geeky to find interesting in such matters