A @ C
No, all am am saying is that the 3times rule only works for a constant ROD. As i previously stated, the norm is 1500 fpm.
IF you deviate fron that, then the constant does not work. As previously proved by the mathematical examples.
You did not however answer my question. The 3times ruke IS based on 1500fpm on a fast(er) moving aircraft. You know this as well as i do.
You seem a reasonable individual. Please don't be the 'how dare you question me' brigade.