I can make that sweeping statement because it is true. A tautology is established.

 

The previous statement I made is an instant proof check, but then you are too ignorant to understand THAT, airplane 'expert.'  

 

Browning AN/M2 "light-barrel" dorsal nose-mount synchronized machine guns and two .303 Browning machine guns in each wing to be inadequate.^[22] 
   

So much for expert opinions!

so much for yours, the Ranger was never developed for motor cannon but in the XP77 it was intended to be mounted ABOVE the engine and could fire through the spinner due to the large reduction gear used, however this was pure theory as the XP77 was such a diaster 

 

Both Continental and Ford may have similar fits but neither was designed for a motor cannon 

 

no US engine I have heard of used a hollow crank setup needed for a motor cannon

 

The Ford G-series tank engines remind you of something? Those were the Ford Vee 12 cut in half. Patterned on the Hispano Suiza aero engines to saddle a motor cannon originally. The war caught Ford in mid development, so the American army took the Ford engine and had it cut down to use in its medium tanks.   

 

 

The Ford G-series tank engines remind you of something? Those were the Ford Vee 12 cut in half. Patterned on the Hispano Suiza aero engines to saddle a motor cannon originally. The war caught Ford in mid development, so the American army took the Ford engine and had it cut down to use in its medium tanks. 

 

yes they look like the aero engine with 4 cylinders missing (being a V8 not a V6) however it was a clean paper design and whilst may have been influenced by the HS was a completely different design owing far more to the Liberty

 

the HS used masterslave rods whilst the ford had individual rods, the HS was single cam and the ford twin to name a few major points

the American army didnt do anything, Ford realising that they couldn't sell any of the aircraft engines decided to produce a V8 based on it for sale as a Tank/truck engine

 

 

You are wrong OBNW. The American War Production Board told Ford to make it a tank engine. They did. Otherwise they would have competed with Allison. That was about 1939.  

 

Internals to the crank, cams,  and piston rod assembly had nothing to do  with the saddle geometry of the block.

 

you are wrong, ford proposed a new tank engine and the design was accepted, the US govenment didnt initiate it (the M3 and M4 were designed with a radial engine)

 

the engine is different in vitually every aspect, it used seperate heads the HS used one piece barrel and heads, the bore asnd stroke are different as are the cam drives the crank design and spacing, in fact the only things i can find that are the same is that it was a 60 degree v12  as was the merlin and alison

you are wrong, ford proposed a new tank engine and the design was accepted, the US govenment didnt initiate it (the M3 and M4 were designed with a radial engine)

 

the engine is different in vitually every aspect, it used seperate heads the HS used one piece barrel and heads, the bore asnd stroke are different as are the cam drives the crank design and spacing, in fact the only things i can find that are the same is that it was a 60 degree v12  as was the merlin and alison

Image.

 

It demonstrates itself, OBNW. That is from  1939.

You could both be right, as there are multiple stories about how/why the GAA was built, and multiple versions of each story. General gist is that it started as an experimental aero engine then shennanigans happen all around and its turned into a tank engine between 1940 and 1942.

 

One version is that Ford, being snubbed/and or pulling out of the Merlin production contract, decided to build its own, brand-new V12 to compete with the Merlin. So confident was the company of success that it tooled up for production, only to find itself locked out due to the AAF's contracts with Allison and Packard and the Navy's preference for round, air cooled thingies. The US Army then came to the party seeking an alternative to the air cooled radials in the Sherman, Ford lops four cylinders off and the GAA is born.