OT: Looking for a good physics site

[Baron Munchausen]

I sent an email to MM, suggesting he read this thread. Here is his comment:

They're on the right track, but the basic problem is not spelled out. Is
this person looking for the intercept point, or angle and velocity for one
of the ships? If this is a missile seeking against another, are their
restrictions on the missile's movement? He needs to provide quite a bit more
information.

I'm guessing that he means you need different formulas for different aspects of this problem.

[narf poit chez BOOM]

Well, I'm looking for the straight-line direction for the ship to accelerate in, at its current acceleration, to intercept another ship with the potential for both velocity and acceleration.

But I do have an (Uncommented) .dll for that now.

[AngleWyrm]

Here's a doc on missile maneuvers that seems relevant:
Proportional Navigation Against Time-Varying Target Maneuvers (pdf). It's rocket science. It's better than predecessors, but does contain a simplifying assumption: "The autopilot and seeker response is assumed to be instantaneous and the missile angle of attack is assumed to be negligibly small."

Also may be worth looking into Augmented Proportional Navigation.

[narf poit chez BOOM]

Thanks.

[narf poit chez BOOM]

What's a good image registration code for PHPBB2 and how would I install it? I'm getting a ton of spammers on my forum.