Length of Spitfire Nose?

I’d say about 11.5” longer

I’d say about that, too. I don’t have the exact figures to hand (and for once Google isn’t doing itself justice), but the Spit MkI was just under 30ft long, the MkIX (depending on rudder configuration) was nearer 31.

I’d say about 11.5” longer ; the drawing for the mkVII says the front part of the cowling is 5′ 10” ,( they appear to have just lengthened the mkV cowlings) and the total length of the mk IX is 6′ 9.5” (nominally) ;the extra length was mainly for the 2 stage blower although the 2 speed unit was a few inches longer than the single. The spinner is longer too