Light twins not using contra-rotating propellers

Recently, Mxsmanic posted:

Neil Gould writes:

I can guarantee that those other airports are designed with
knowledge of the prevailing winds in the area.

I can guarantee that prevailing winds are not in the same direction
for every airport.

It doesn't matter, in Real World 1.0 airport design results in an
asymmetrical distribution of x-wind factors, so your assertion that
x-winds would be statistically 50% R/L at any airport is just wrong.

Neil

Answer this.....

First some background. For times of bad weather they make a device you
can put your bicycle on to "train" indoors called "Rollers" They
consist of three rollers about 18 to 24 inches long, 2 are close
together and the back wheel rests between them the third is positioned
under the front wheel. See photo here....
http://www.nashbar.com/nashbar_photos/medium/TX-SPT.gif

In this situation the bicycle is obviously not moving forward. How does
it stay upright?


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"Chris W" wrote in message
...
Answer this.....

First some background. For times of bad weather they make a device you
can put your bicycle on to "train" indoors called "Rollers" They consist
of three rollers about 18 to 24 inches long, 2 are close together and the
back wheel rests between them the third is positioned under the front
wheel. See photo here....
http://www.nashbar.com/nashbar_photos/medium/TX-SPT.gif

In this situation the bicycle is obviously not moving forward. How does
it stay upright?


A bicycle is an open loop unstable "plant" that is stabilized by an organic
neural net closed loop controller.

Some aircraft are like that too. e.g. taildraggers on the ground. (how's
that for an attempt to drag this back to an aviation related thread?)

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Geoff
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Chris W writes:

In this situation the bicycle is obviously not moving forward. How does
it stay upright?

The cyclist balances it, assisted by the gyroscopic stabilizing effect
of the turning wheel (the heavier it is and the faster it turns, the
better).

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Greg Farris writes:



THIS :

Yes, through momentum. But this momentum is eroded by irreversible
effects such as friction with the ground and air. Eventually none is
left, and the bicycle stops.

PLUS THIS:

The cyclist balances it, assisted by the gyroscopic stabilizing effect
of the turning wheel (the heavier it is and the faster it turns, the
better).


EQUALS THIS :

"Yes, I was completely wrong, and everything I wrote was complete bull****,
based on a complete lack of understanding of the facts. . ."

No. If the bicycle cannot turn, it will fall over. It cannot turn on
rollers. It can turn on flat pavement.

You see, the bicycle stays up because it turns. As long as it has
momentum or power and traction, it will continue to turn or roll
straight. It can only stop when it has no propulsive power or
momentum.

This is more obvious in motorcycles than bicycles, but it applies to
both.

Similar principles apply to aircraft, which is why you generally
cannot simply push the yoke forward to descend or pull it back to
climb.

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Mxsmanic wrote:

Newps writes:


No, it will not. That's ridiculous.


Try it and see.

I've got lots of hours on bikes. I am perfectly capable of making a
bike fall over. Any kid can do that.

Mxsmanic wrote:

Newps writes:


Where did you come up with that statistic?


It's statistically inevitable.

No, it's not.




At my airport the wind blows from the left probably over 90% of the time.


But there are other airports in the world.

What a genius. All the airports align their runways into the prevailing
wind. You will find the predominant crosswind comes from the same side
nearly every time.

"Mxsmanic" wrote in message
news
No. If the bicycle cannot turn, it will fall over. It cannot turn on
rollers. It can turn on flat pavement.

You see, the bicycle stays up because it turns. As long as it has
momentum or power and traction, it will continue to turn or roll
straight. It can only stop when it has no propulsive power or
momentum.

This is more obvious in motorcycles than bicycles, but it applies to
both.

Similar principles apply to aircraft, which is why you generally
cannot simply push the yoke forward to descend or pull it back to
climb.


I'm curious, do you have brown eyes?

"Mxsmanic" wrote in message
news
Similar principles apply to aircraft, which is why you generally
cannot simply push the yoke forward to descend or pull it back to
climb.

Horsefeathers!!! You are such an idiot. I can descend by pushing the yoke
forward or pulling it back.
^^ ^^
[AKA BS]

Mxsmanic wrote:
Similar principles apply to aircraft, which is why you generally
cannot simply push the yoke forward to descend or pull it back to
climb.

MX the Great Oracle has spoken. Why, millenia ago Delphi was
overrated. Yellow Book dot commmmm......

F--