# Proverse Yaw

#### popaviator

##### Well-Known Member
Anyone want to explain what proverse yaw is? :buck:

when something produces a yaw force that you dont want, its adverse. If it produces a yaw force complimenting what you are attempting to do, it is provese.

google it up, there are a couple pages with diagrams.

So, when you input a control to combat adverse yaw, are you creating proverse yaw? until the yaw in question is no longer a factor?

I guess so, yeah. One situation where proverse yaw comes into play is on an aircraft (such as the MU-2 that our wonderful Boris flies) that uses spoilers for roll control. For example, if you want to roll left in the MU-2, the left spoiler pops up, reducing lift on the left wing. It also increases drag on the left wing, creating yaw in the direction of the turn, or proverse yaw.

Anyone want to explain what proverse yaw is? :buck:
What you're referring to is proverse roll. From T-34 trainee guide: "Proverse roll is the tendency of an airplane to roll in the same direction as it is yawing. When an airplane yaws, the yawing motion causes one wing to advance and the other wing to retreat. This increases the airflow on the advancing wing and decreases airflow over the retreating wing. A difference in lift is created between the two wings, and the airplane rolls in the same direction as it yawed. Proverse roll is even more pronounced on swept wing airplanes since the advancing wing will have more chordwise flow and will produce more lift."
Adverse Yaw occurs when you roll into a turn and the nose of the jet yaws opposite (or adversely) the direction of the turn. Again, more pronounced with swept wings. "When an airplane rolls, it has more lift on the up-going wing than on the down-going wing. This causes an increase in induced drag on the up-going wing that will retard that wing’s forward motion and cause the nose to yaw in the opposite direction of the roll. The aircraft produces adverse yaw each time the ailerons are deflected (rolling into and out of a turn)."

Sweet, my time machine worked!

I'm in my 20's!

This is how we recruit at JC - nerd sniping.

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