Recent content by daraphy

thx for the info ill check the websites to :)

Ill read that too thx

i'll check it, thanks

I saw a flat air foil can do the work so I sticked with that

I dont see any tutorial at the page

I converted the RPM's of my motor to m/s using 0.1 as the radius. I did not understand the angle part

Saw this equation on Nasa's website about lift equation: I'm trying to build a miniature helicopter and decided to test that equation. For CI I used 0.5 because I saw a graph where flat air foils gets 0.5 CI when placed at around 10 degrees. For air density I went with 1.225 because I live...

Then I'll just test until it moves

straight forward

Make a rectangular shape boat move at, for example, 1 m/s constant speed

So if I want to know the amount of force a motor has to do in order to move a boat, there's no easy to calc answer?

What I know is that in ground, when trying to move an object, another force appears that you have to beat in order to move the object, so for example you'll need more than 98N to start moving a 10kg object in a frictionless environment, I think im right. So I would like to know how that scenario...

Is there any friction coefficient in the sea as there is in ground? I've tried searching but I see results between 0.4 and 25.7 (?). If there's no such thing as a coefficient of friction to water, how do I calculate the amount of force to start moving a X mass object in water?