OGame - ninth day

I upgraded impulse drive to 2 and now I can build heavy fighters, but they are too expensive. I have armour technology 4 and now it it upgrading to 5. I should also upgade my computer technology because your maximum fleet number is based on it. If you have 0 comp tech. then you can have 1 fleet going, if you have 1 then you can have 2... I sent my fleet to same planet where I attacked yesteday.