Originally posted by Schutt
Isnt the hispano mustang heavier, slower, worse airodynamics and worse engine than the P51B?
No, the Mustang Mk1a (P-51, with no letter designation for USAAF) weighed less than the P-51B, by about 300 lbs. Typically, the Allison engine installation weighed less than the Merlin. I do not believe that there was any significant difference in drag either.
I would expect the Allison Mustangs to be a bit more maneuverable than the P-51B and have an even greater advantage over the P-51D. However, its middling acceleration and climb offsets that.
What would make the Mustang Mk.Ia a premier ride is the guns. Does anyone think the Tempest would be perked if it was armed like a Hurricane Mk.I? Despite its speed, it would be a hanger queen if it wasn't for the quad Hispanos.
My regards,
Widewing