Why are Vx and Vy Different?!?!?!

In this video we talk about why Vx and Vy are different speeds from a power and thrust prospective.

If you prefer reading, cehck out this article, where I took all my information anyway.

Merryface Aviation is a Youtube Channel with various aviation related videos.

The main themes on this channel are:

Flight Training

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Aviation Related Tutorials

Answers to general aviation question

Videos are uploaded at least once a week (every Thursday). It's not uncommon for me to upload more videos when there's a backlog!




#Aviation

[lassefaugstad]

Thanks man! Best video I've seen so far on why excess thrust and excess power are different!

[stenya]

I have a very simple (I think) explanation if somebody has a minimal interest in car can understand:

Vx is torque
Vy is horsepower

Vx aka torque needs if you want to tow a caravan to the hill. (Steep climb, Vx, slow but steep, like a tractor)
Vy aka horsepower needs if you want to go fast on highway. (accelerate, need to cover horizontal distance fast, Vy)

The rest is magic with those charts ;)

[Stefan-ntzk]

OMG! You might just saved my day! Best explanation ever! Thank you so much!! And please keep up this excellent explanations!

[rupunnb]

@Merryfaceaviation, brilliant explanation! Could you please do one on Vmd vs Vmp as well, in the context of Max range vs. Max endurance please?

[rudyhiller]

This is a great way to explain it. So does changing the pitch of the propeller blade change Vx? Seems it would

[dploit]

thanks ! a lot in the summary please add that VY is were Maximun excess thrust (not pwr, little mistake ) but helps a lot to understand !

[yongah]

At 4:43 you have Vx as best RATE of climb...is Vx not best angle of climb?

[MDRedwood]

At 7:22 you said Vx by mistake. I think you meant Vy.

[piquecuriosity]

Hi buddy, thats a great explanation. But i would like to learn why faster speed reduce angle of attack of the blades? Is not its angle same? So, i would expect it to pull more air as it gets faster and produce more thrust.

[AlanTheBest]

I have one question. Is it correct to say that VX would indeed be correlated to Vmd (The velocity where you have minimum drag or green doy speed)? Because the jet engine thrust avaliable remains quasi constant no matter the airspeed?

[steffenleo]

Well explained....thank Left of the minimum if i reduce thrust(throttle down Power) speed increased and right of minima if i increased thrust(throttle up) speed increased, is that right?

[dumbdumb]

You try to give the video more brightness it will be great if you do