Hurri/Spit, both have the Merlin, so why is the hurri so much slower?

[HauptmannMolders]

I have to assume this also comes down to aeordynamics, simply have a look at how thick the wings are on the Hurri, they are positively massive! Also (and this is splitting hairs) wouldn't the fact that the Spitfire is aluminium vs the fabric of the Hurri cause less friction with the air? Lots of reasons I guess...

[David603]

Originally Posted by HauptmannMolders

I have to assume this also comes down to aeordynamics, simply have a look at how thick the wings are on the Hurri, they are positively massive! Also (and this is splitting hairs) wouldn't the fact that the Spitfire is aluminium vs the fabric of the Hurri cause less friction with the air? Lots of reasons I guess...

Well, the fabric used in the construction of the Hurricane could be a factor, but only the rear fusalage, tail assembly and control surfaces of the Hurricane are fabric covered, with the wings and centre fuselage/cowling being all metal, so I would think the difference would be minimal.

[Vulcan607]

Also i believe the thick leading edge of the spitfires wing (designed because of the possibility of a water cooled engine) creates a better air flow over the wing as it tapers.