What kind of plane are you flying? You say that "everything" is at 100%. If you're flying a bomber with a full fuel and bomb load, you're going to have a bear of a time getting any kind of speed up. Bombers generally don't require a 100% fuel load - heck, even 50% can take you a loooong way in a big bomber. Also, the large bombers are the only planes that begin takeoff with flaps down.
You should list the plane type, the fuel load, and the armament load you selected.