If you can't find the enemy, they're behind you.
I think I'm finished flying the HS123.
That was keenly frustrating, but that plane is now spaded and I can forget it.
You know a biplane is slow, and this is one with fixed landing gear. (oddly named, as if you can't raise your landing gear, I find that broken) If you don't have it spaded, a U.S. F2A can out turn you, whether you use your flaps or not, and you can run out of airspeed just by trying.
With only 2 7.62mm mg's, it isn't going to outgun much of anything. This really is a pain for a slow airplane, as so many enemy know they can outrun you by flying away.