Also, worth noting but Gravesend in game is wrong for 1940. The original runway was quite short, being clipped at either end. You can see this with the taxiways on page 6. The runway was extended to the north and sound sometime during midwar.
I'm pretty sure the acceleration on the FM's for the Hurricane (which operated there with No.501) won't get to rotation speed before running out of room on the 1940 runway length, we in No.501 use the whole thing and it's just about enough in the two stage Hurricane
