What Factors affect Vmc?| Minimum Control Speed (Part 2)

This is Part 2 on Minimum Control Speed. Vmc is the speed at which the rudder looses the ability to offset the asymmetrical thrust produced by one engine being inoperative in a multi engine aircraft. This speed has a variety of factors affecting it. This video looks at those factors and discusses how they either increase or decrease the speed which rudder authority fails.

This video is not intended to be used for flight training purposes but rather to act as a informational guide. Consult a properly certified and authorized flight instructor for training and follow all FAA regulations pertaining to aircraft operation and training.

Chapters:
00:00 What Factors Affect Vmc?
2:17 How Vmc is Certified?
3:21 How does Thrust Affect Vmc?
4:45 How does Rudder Authority Affect Vmc?
7:14 Queen Air Accident Explanation
9:42 How does Drag Affect Vmc?
11:40 How does Weight Affect Vmc?

#MultiEngineTraining #FlightTraining #LearningToFly

[sarahmendoza]

This was probably one of the best vmc explanations on YouTube. Thanks so much. Huge help

[olgreywolf]

Years ago, BE65, Queenaire ... engine failure on climbout, heavily loaded, four pax, fortunately was still in pattern, coincidentally on a downwind. Feathered nr. 2, briefly continued climb, then turned into good engine, gear down, easy landing. BUT .... did my damndest to continue a descent, and, by chance having just completed a detailed flight school program on the Queenair, knew to keep the airplane well above Vmc .... landing was good, and otherwise normal.

[pilotactor]

YOU DESERVE MORE SUBSCRIBERS CAPTAIN!!! This is the most comprehensive video on VMCA ive seen. Thankyou!!! Keep up this valuable work!

[nimbapilot]

Great job explaining those factors. I'm currently studying before starting training for my multi rating. Thanks for the video.

[NickLaoutaris]

i keep on watching your videos man ! You have done very nice work. Thank you . this is good stuff. Simple, and to the point. The way you explain things / concepts is very nice and effective.

[olgreywolf]

Years ago, BE65, Queenaire ... engine failure on climbout, heavily loaded, four pax, fortunately was still in pattern, coincidentally on a downwind. Feathered nr. 2, briefly continued climb, then turned into good engine, gear down, easy landing. BUT .... did my damndest to continue a descent,

[TheGoose]

8:52 the problem with this statement about the rudder is that if he banked towards the bad engine (the left) then his rudder input should be right rudder. If he is putting right rudder, in a left bank the lift component would have been facing down, not up. So I am not sure I understand your reasoning for the vmc increase.

However I do remember being taught that every degree into the bad engine increases vmc by a certain amount, just not the reason.

[Mikinct]

That's Queen air VMC roll not because they simply turned into dead engine but they probably did so at "Low Air Speeds" way below even blue line.

If the plane is flying at 150knots that shouldn't be an issue but you're right, why tempt fate. Easy to make turns into good engine or at worst, fly straight to a off runway landing area without the need to turn at all. Simply land the plane safely.

[Mikinct]

Ive heard that if you low in altitude you could he very close to your okanes stall speed.

If your up at 10, 000ft you vmc soeeds typically would be 10 knots higher. If if your vmc speed is 57knots at 10, 000ft vmc speed will be 67knots genreral rule.

So it might be better to practice any vmc demo to get multi engine rating at a higher altitude?

[ivanyakinov]

So let's say hypothetically, That your left engine was out, you banked 5 degrees into the right engine
You needed to make a left turn to line up on final.
Could you just make a 10 degree bank to get a 15 degree turn since you're putting 5 degrees towards the right as your correction for the turning tendencies?

I'm sort of implying that if you use 5 degrees to hold relatively straight course, it would make sense that it becomes the new 0...
Sorry if its a loaded question.

[atlerthedark]

Why is there smoke coming from the doorway behind you?

[THEnelsonbruhs]

At my school I’ve been taught “raise the dead” to remember which bank to use for an inoperative engine.

Raise the dead ENGINE.