The on going discussion:
http://www.axisandallies.org/forums/index.php?topic=40520.msg1693864#msg1693864
on Transport with defense roll makes me wonder about actual combat strength of Classic Transport and an escorted TP:
Transport and Destroyer A2 D2 C15, 1 hit
Offense & Defense factor:
36*(2/15^2) = 0.32
Transport and Cruiser A3 D3 C19, 1 hit
Offense & Defense factor:
36*(3/19^2) = 0.30
Classic Transport A0 D1 C8, 1 hit
Defense factor:
36*(1/8^2) = 0.5625
I revised the opening post.
As comparison points, a Fighter A3 D4 C10 off/def is 1.08 / 1.44
Destroyer A2 D2 C8, 1 hit
Offense & Defense factor:
36*(2/8^2) = 1.125
Submarine A2 D1 C6
Offense:
36*(2/6^2) = 2.00
36*(3/6^2) = surprise strike 3.00
Defense:
36*(1/6^2) = 1.00
36*(1.33/6^2) = surprise strike 1.33
You need to send 2 Destroyers to get a similar defense value with Classic Transport strength 0.5625:
Transport and 2 Destroyers A4 D4 C23, 2 hits
Offense & Defense factor:
36*(2/11.5^2) = 0.544
Or make defenseless Transport a 4 IPCs unit:
Transport and Destroyer A2 D2 C12, 1 hit
Offense & Defense factor:
36*(2/12^2) = 0.50
Now, if you want to introduce a Classic TP with the same strength of actual DD+TP combo 0.32:
You need to make TP cost 10,5 IPCs:
Classic Transport A0 D1 C10, 1 hit
Defense factor:
36*(1/10^2) = 0.36
At 11 IPCs, it would be 0.30 though.
Transport defending A0 D1 would be interesting at a clean 10 IPCs.