does a twin engine lose its gyroscopic properties of inertia?

[jf1981]

Originally Posted by raaaid

you have two flagged propellers aiming forward with opposite sense

you move them to the sides so now they have THE SAME SENSE

this works in space as well so momentum can be created

whats wrong with this?

Because there are forces and moments which are not really the same thing in that sense. You have strong forces between the propellers when the plane (read direction) of rotation changes, but the forces are in opposite direction through the physical structure and cancel each other.

You have not eliminated the forces, it goes through somewhere, even on diffeent wings for contrarotating, the airframe absorbs the forces through wings and structure, in some cases the forces are equal and in opposite directions.

Nothing disappears, nothing wrong. You get to look into what's happening in a gyro more in details. Don't see any question really.