Coam again

[Merlin]

Thanks for your good wishes, I’m recovering slowly.

What is the mechanism for making all of the parts of the fly leg decelerate at the same time?

Hi Walter

Keeping in mind the assumptions: straight horizontal fly leg, flexible but not stretchable line.
The mechanism lies in the fact that tension varies at the same time all over the fly leg. Can you imagine a mechanism by which all parts of the fly leg would have a different flying speed under the simplified assumptions? It is the same medium for all “particles”.

I dislike the subtleties of “collisions” viewed in physics by opposition to common sense perception. For laymen a collision means that there is an antagonism somewhere. Here we do not have a locomotive pulling on coaches. As the locomotive slows down, one could imagine that coaches would collide with the locomotive, pushing it forwards. But here our coaches have brakes/engines (tension) which follows the action of the locomotive. I then hardly imagine an actual “collision” within the line, or we are on semantic grounds for specialists.

Merlin

[Graeme H]

The fly leg collides with the rod leg which in turn forms the loop. That collision causes rotation of the loop nose.

That's not a hard concept, IMHO.

Cheers,
Graeme