Wotan, 3 inches is more than enough to aim and fire the PB rockets. They added that vertical space for a reason, else they would be adding only more drag for free and that would be quite stupid.
To raise my head 3 inches I don't need to raise my seat. Of course, unstrapping the harness is also not necessary.
They didn't fire rockets by looking over the nose. The used the standard gun site.
Drag was insignificant.
Hauptman Erhard Jähnert Staffelkäpitan of 2./Schlachtgeschwader 3 flying the 190F-8 over the Kurland Bridgehead describes rocket attacks against soviet armor.
He states that the rockets had a trajectory similar to the Mk 108 in that the rockets arced and at a range of 600m would hit almost centered in his gun site. He never mentions rising up in his seat, or that the new 'blown canopy' allowed him to see 'over the nose'.
He destroyed 25 Soviet tanks while flying the FW 190F-8 over Kurland:
On 16 February 1945, I attacked enemy armor in my Focke Wolf 190. It had already gotten quite close to our main line of resistance in foggy weather about 10 kilometers southeast of Tukkum.
Three of my comrades closed up with me when I designated the target. We dove on the group of armor and fired our rockets. I was fortunate enough to knock out three enemy tanks in three passes. Three more were crippled by my comrades. Since I expended my rockets, I tried to destroy the remaining tanks, which had already turned back, with my on-board weapons...
Wilbus,
No game that I know of (AH2, WB3, IL2/FB) model the 190 with good 'over the nose view'. In the case of Il2/Fb and AH2 the canopy frames are thick and large and impair vision, especially forward vision dramatically.
The head positions in the AH1 190s were overly generous (and in a lot of other planes). You could move left or right and almost shift out through the glass. The same with seeing over the nose. You could rise up almost a foot then slide forward.
The only real issue with the AH2 190s are the thick canopy frames, not 'over the nose view' imho...