Introductio to AeroSpace 03b

OPENING QUESTION: What happens to a jet airliner when it tries to climb too quickly?

Why is that so dangerous?

LEARNING GOAL FOR TODAY: I will how an airplane can 'stall' during today's class.

WORDS O' THE DAY:

  • Force: ("A push or a pull")
  • Thurst ("forward pushing force")
  • Air Friction ("resists forward motion")
  • Lift ("Lower pressure, upward pull")
  • Weight ("downward pull")
  • Stall ("Stops Moving Upward")

WORK O' THE DAY:

Let's take a look at this rather terrifying example of a stall.

Apparently there was some very heavy cargo in that plane that was not secured well enough. That cargo shifted, fell to the back of the plane and basically pulled the back end of the plane down.

That pulled the nose of the plane up... resulting in a stall.

Thinking of our four fources, how is a stall generated?

Now take a gander at this plane designed by Burt Rutan. He designed some pretty amazing aircraft in his career such as the Veri-Eze which was sold in kit form back in the 80's:

(by the way, does it remind you of any of our 10 significant aircraft? His company also designed THIS:

 

... there a couple of features that are much different from other aircraft. What do you suppose their purpose might be?

 

 

ANSWER: LIFT!!!! It was pretty much impossible to stall the Veri-Eze. If the pilot climbed too steeply, airflow across the front 'wing' (called a canard) directed the plane back downwards.

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Now let's revisit yesterday's conversation about the 737 MAX aircraft accidents.

In each case, the pilots were actually fighting with their plane to avoid a stall, which we have seen can be VERY dangerous.

 

I don't expect you to remember everything we talked about, but I'm hoping you can pick out several of those from THIS article.

So, take a few moments to see if you can spot topics I mentioned yesterday, and write them down our the strips I gave you (5 words or so at most!).

 

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