It's not a flying tank, doesn't have exceptional armor (hello radiator?) except in the F8's case (lose parts in that one and any noob will outfly you), only the D9 has good speed but that's offset by the worse maneuvering in the game. Huge gun package? Only on the heavy A8 loadouts and 152, the D9 and A5 are anemic for all their other good qualities.. The F8 is a dumptruck.
Boiling this clue down to its essentials says "you don't know what you're talking about".
M00t speaks with wisdom. If any plane has a glass jaw, it's the radiator on the D9. Deacking, or even getting too near the ack is a real gamble in that thing.
When one of our bases is under heavy attack and at risk of being capped, I like to take a D9 to the enemy airfield and harrass the guys upping before they can get back into the fight over
my home field. I may or may not make any kills (it's pretty easy to dodge a Dora pass), but I can tie up several guys who would otherwise be on their way back to cap
my field. This may buy enough time for my countrymen to shift the fight away from our field towards the enemy. I don't consider this vulching or camping, and if I squander my energy, it pretty much becomes a suicide mission (especially if you're dumb enough to take that
"flying tank" thru the ack

).