Helicopter Min. Lift

openstudy.com/users/isaiah.feynman#/updates/521b0408e4b0750826dfa0d2

Thought Experiment
http://www.pitt.edu/~jdnorton/Goodies/TE-antiTE/


(Just a cool picture.)

Flight Mechanics of a Rotorcraft
http://rtime.felk.cvut.cz/helicopter/flight_mechanics_of_a_rotorcraft

Theory of Flight
https://rdl.train.army.mil/catalog-ws/view/100.ATSC/124A2C90-72CD-4B05-AB8B-ABC8718F9760-1274574464617/3-04.203/chap1.htm

Other links and pictures

http://en.wikipedia.org/wiki/Lift-to-drag_ratio
http://www.dynamicflight.com/aerodynamics/dissymmetry/

phone battery

openstudy.com/users/isaiah.feynman#/updates/5363e045e4b02f72432ca298

 

 1

"Charge is accumulating on one electrode of the battery. The battery's electric field is also increasing as its potential difference (voltage). The primary driver though is the accumulation of a charge on one electrode of the batter--or more specifically a charge difference between the electrodes of the battery.

Every battery has a maximum storage capacity. The percentage you see is the percent of the current amount of charge/voltage compared to the total charge/voltage possible."
--PsiSquared