I am using Reg's programs to calculate the Q and R of 'large'. These coils are
in the range of 220 mm in diameter and long.

There seems to be a difference in the coil simulation between Vertload and
c_poise. In particular c_poise seems more sensitive to coil wire diameter then
vertload. Vertical load will create a coil with low R and a relativily small
wire diameter and pitch, 2 mm and .2 pitch (it does not predict Q). C_poise
requires a large wire diameter, 12 mm and a high pitch, .8 to achieve similar R
values.

Is there a reason for this? Am I missing something?

Is there a way to simulate Q and R for these coils with nec?? How would one
create an nec representation for a coil?

Thanks - Dan - kb0qil