[sublynx]

I found this mention:

A torpedo after leaving the tube and before starting its turn, covered a distance called reach (Germ. gerade Vorlauf), which depended on the torpedo type (types C/06 and G/6 - 10 m, type G/7 - 15 m, type G7a and G7e – 9.5 m). Then it started its turn with a radius that also depended on the torpedo type (type C/06 - 145 m, type G/6 - 100 m, type G/7 - 105 m, type G7a and G7e - 95 m).

from here:

http://www.tvre.org/en/gyro-angled-torpedoes

(I haven't had an opportunity to start using the program yet, so I don't know if the real life values are any good.)