Your armament?

[Glider]

A slightly more practical suggestion. The first P51's had 4 x 20, why not put them back.

[DerAdlerIstGelandet]

Would 4 20mm Cannons even fit in the nose.

[Gnomey]

Would 4 20mm Cannons even fit in the nose.

I doubt it somehow. If they did, there wouldn't be much room for ammo if any.

[DerAdlerIstGelandet]

That is what I was thinking.

[MacArther]

two 50 cals and a hub firing .30 cal minigun

[the lancaster kicks ass]

that's pretty weak, even with a high ROF the .30 cal wasn't hugely effective........

[MacArther]

Ok, two cowling firing miniguns. And, a pair of 50 cals in the wings ( one per wing), and a hub firing 20mm cannon

[delcyros]

The synchronization of the 20mm MG 151 reduced it´s rof from 780 - 800 to 550-750 rpm.
I think that the 0.50 cal guns of the P-51/47 were exaclty what was needed by them. They hadn´t to deal with heavys but with small and quite agile targets.

[CharlesBronson]

German Heavies:

Mauser Mg-213C-20 caliber: 20x135, rate of fire 1200 rpm. V0=830 m/s.





Reinhmetall-Borsig MK-108, caliber 30x91 RB, rate of fire 620-660 rpm. V0= 505 m/s.





Rheinmetall Borsig MK-103, Caliber 30x184B, rate of fire 400-420 rpm, V0= 710 m/s ( APHE steel core), 900 m/s ( Mine), 960 m/s ( Panzergranate 40)





Mauser MK-214, caliber 50x420R, rate of fire 150-160 rpm, V0= 560 m/s (HE), 825 m/s ( APHE-T).




Reinhmetall-Borsig MK-112, caliber 55x175RB, rate of fire 350 rpm, V0= 560 m/s.

[Jabberwocky]

You can't fit a multi-barrel gun in between the cylinder banks of a Merlin or Allison V-1710 without changing a serious amount of ducting on the engine. It is theoretically possible to do with the Allison, but you would have to reduce the size of the valve gears and relocate the induction housing somewhere else. The end result would be a significant increase in frontal area and a completely altered engine footprint, for little benefit. A 20mm Hispano type cannon is going to be more effective than a .303 Gatling style gun anyway.

For me the best armament fit for a radial engined fighter was the Fw-190A6 onwards, with 4 MG 151/20s (20 mm) in the wings and 2 MG 131s (13.2mm) in the cowl. This was enough to take down any target in WW2 aviation. The only fighter that I feel equaled this was the Tempest V Serise II, with 4 Mk V Hispano's (short barrel, increased RoF) and 175-200 rpg. La-7 with 3 nose mounted B-20s comes close as well.

For inlines give me the MC-205 with 3 MG 151/20 cannons (one in the nose, two in the wings) and 2 12.7 mm Brenda SCOTTI HMGs in the upper cowl. Close second is the Spitfire IXe with 2 Hispanos and 2 M2 Brownings.

[The Jug Rules!]

Yea and Im sure it would climb to 35k just fine... What a fat heavy bitch that would be...

FAT!!!!BITCH!!!!How insulting...

[DerAdlerIstGelandet]

Ok, two cowling firing miniguns. And, a pair of 50 cals in the wings ( one per wing), and a hub firing 20mm cannon

Okay I might be wrong, but were there even any "mini guns" (note that the mini gun is not that small) built in WW2 and even if they were they certainly would not fit into a WW2 fighter like a Mustang. Plus a WW2 fighter would not be able to carry the amount of ammo for a mini gun. The rate of fire would have been to high to make it worth it.

[The Jug Rules!]

Mabe I would fit in something like the Mossie or the Beufighter.(Dont know if I spelled it right...What the heck does beufighter mean anyway?)

[DerAdlerIstGelandet]

There still would not have been eneogh room to put eneogh ammo to make it matter anyhow.

[Glider]

The Beaufighter was developed using as many parts of the Beaufort which was a Torpedo Bomber.
Why Beau? I don't really know, but its often used as a short name for something good, attractive.
Miniguns didn't exist in WW2 so I suggest you stick to things that did exist. As for space the Beaufighter and Mossie both had more space than most, in particular the Mossie which had an internal bomb bay that could be used for extra.
Also if you want a reasoned debate suggest that you work out the weight of the Guns carried by the real planes and then propose alternatives within or close to that weight. Then they are realistic alternatives instead of flights of fantasy.