Light twins not using contra-rotating propellers

Steve Foley writes:

By your standards, are bicycles poorly designed because they are unstable at
slow speeds?

They aren't unstable at slow speeds.

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"Mxsmanic" wrote in message
...
Steve Foley writes:

By your standards, are bicycles poorly designed because they are unstable
at
slow speeds?

They aren't unstable at slow speeds.

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I see you know about as much about bicycles as you do about airplanes

Steve Foley writes:

I see you know about as much about bicycles as you do about airplanes

I think I know slightly more about airplanes, but I do know the basic
principles of bicycles.

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"Mxsmanic" wrote in message
...
Steve Foley writes:

I see you know about as much about bicycles as you do about airplanes

I think I know slightly more about airplanes, but I do know the basic
principles of bicycles.


When you approach stop, a bicycle will fall over to one side or the other.
(unless yours still has training wheels).

- Note - MXX is intended as a flag to anyone wishing to block my responses
to Anthony.

Steve Foley writes:

When you approach stop, a bicycle will fall over to one side or the other.
(unless yours still has training wheels).

As long as the rear wheel is powered and both wheels have traction,
the bicycle cannot fall over. The usual reasons for a bicycle falling
over are a loss of traction or a complete absence of propulsive power
to the rear wheel.

Exactly the same principle applies to motorcycles, scooters, etc.

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In article ,
says...


Steve Foley writes:

When you approach stop, a bicycle will fall over to one side or the other.
(unless yours still has training wheels).

As long as the rear wheel is powered and both wheels have traction,
the bicycle cannot fall over. The usual reasons for a bicycle falling
over are a loss of traction or a complete absence of propulsive power
to the rear wheel.

Exactly the same principle applies to motorcycles, scooters, etc.



And what, precisely, do you expect the "propulsive power" to be accomplishing
if the bicycle is stopped?

Do we reject, then, the notion that the gyroscopic stability provided by the
wheels in motion helps to keep the bicycle upright? It is only a question of
"propulsive power" available to the rear wheel (specifically) while both wheels
must have "traction". As long as this is present the bicycle "cannot" fall
over.

Have I resumed your argument correctly?

Greg Farris writes:

And what, precisely, do you expect the "propulsive power" to be accomplishing
if the bicycle is stopped?

He said "when you approach stop." If the bicycle is still moving and
there is power to the wheel, it won't fall.

Do we reject, then, the notion that the gyroscopic stability provided by the
wheels in motion helps to keep the bicycle upright?

No, but kinetic energy in the bicycle keeps it from falling over. In
order to fall over, it has to have no kinetic energy--it has to stop.
But as long as there is power to the wheel and traction, it cannot
stop, therefore it cannot fall over (which would require a loss of
energy that cannot occur).

It is only a question of
"propulsive power" available to the rear wheel (specifically) while both wheels
must have "traction". As long as this is present the bicycle "cannot" fall
over.

Right. It should apply to both wheels, actually, but I haven't
considered that possibility.

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Mxsmanic wrote:



As long as the rear wheel is powered and both wheels have traction,
the bicycle cannot fall over.


It most certainly can.


The usual reasons for a bicycle falling
over are a loss of traction or a complete absence of propulsive power
to the rear wheel.

The main reason is the rider loses his balance.

Newps writes:

It most certainly can.

No, it can't. Watch closely. The bicycle always falls because the
tires slip or because it comes to a stop.

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"Mxsmanic" wrote in message

The usual reasons for a bicycle falling
over are a loss of traction or a complete absence of propulsive power
to the rear wheel.

Well, that sounds like your definintion if design flaw. It falls down due
to a loss of traction.