Performance - difference of opinion

[mad_jock]

In that case they are one in the same thing.

max drag equals min drag.

But as all the texts refer to min drag Vimd as the tangent intercept of the power speed curve that is changing the whole concept of the term minimum drag for one question.

FFF you can't loose energy you can only convert it.

So by exchanging potential energy of a big lump going up or down for kinetic energy of said big lump going through the air. The energy input still needs to equal energy out.

So by decending you will add kinetic energy in which means the amount of energy through drag will increase, the only way it can do that is if the air speed increases. The drag will increase as will the airspeed but at max thrust you will still have max drag.

MJ

just read your question FFF.

In a glide you are using the potential energy of your height, by decsending you are converting that energy to kinetic which is your airspeed which is balanced by your drag for steady state flight.