This post is the basement for explaining the climb, cruise and descend performance of and aircraft. Part of the Private pilot (PPL) and Air Transport Pilot (ATPL) performance course.
The definition of Power (P) is the work per time unit (P=W/t). Let´s change this formula in a more useful way for us. As work is Force multiplied by distance ( W=F x d) , power is de force multiplied for distance divided by time (P=F*d/t).
Speed(v) is distance (d) divided by time (t) ( v= d/t). So we can say that the power is the force multiplied by speed (P =F x v).
Although we know there are many forces actuating in a plane (explained in the post: aircraft take off forces). we are going to focus in Drag and Thrust forces.
So far we know that the Power is a Force multiplied by a Speed (P=FxTAS).
If the force is thrust, we call it, available power ( Pa=TxTAS), and if the force is the Drag, we call it, Required Power.
1.-Stall Speed (Vs). It is where the Power required and the power available are equal.
2.-Minimum power required speed. It is where the difference between power available and required is maximum.
3.-Maximum level flight speed. It is the maximum speed that an aircraft can reach in a flight level.
Weight: if the weight increases
Density Altitude : ( check Density altitude definition) If DA increases .
Configuration : Flaps and landing gear.
Wind : It doesn´t have any effect neither the Pa nor Pr
Matt Pickett | Oct 3,2020
Overall I think good, except check your force (or thrust) vs. speed diagram – at low speed, thrust is high; reference, “Aerodynamics for Naval Aviators”. Also, in the video, Gene Benson has made the same mistake by plotting low thrust at low airspeed.
Also, what is the reference for the black & white diagrams please?
Thanks
LUIS COMENDADOR | Oct 4,2020
Good Morning Matt.
I think I understad your point. This diagram represents an overview of the speed range in all situations. Let me give you a more visual example. Imagine an acrobatic plane flying vertically (https://www.youtube.com/watch?v=SRhxW5-_SXs minute 2:50 ).
It has high power setting and low speed, or if we fly in the second regime ( https://www.icao.int/safety/LOCI/AUPRTATablet/img/05-Powered-Lift-Effect.jpg) .
Thank you very much for your comment . I am glad you like my job.
Have a nice day