good engines, a Double Wasp I think.
Twin Cyclone.
The two engines are similar in that both are two row radial engines.
Wright built the Twin Cyclone. It was a 14 cylinder two tow radial of 42.7L displacement that produced about 1,750 HP although some late-war variants approached 2,000 HP.
In addition to the Avenger, it was also used in the Helldiver and B25 among other uses.
Pratt and Whitney built the Double Wasp. It was an 18 cylinder two row radial of 46L displacement that produced 2,100 HP.
The Double Wasp was used in the P47 Thunderbolt, the F6F Hellcat, the F4U Corsair, the B26, and many other machines.
Being much older, the B17 used a Wright Cyclone which was a single row nine cylinder radial of a "mere" 30L displacement that produced a "mere" 1,000 HP.
The B29 used a Wright 18 cylinder two row radial known as the Wright Duplex Cyclone. This one had a displacement of 55L and produced 2,200 HP initially, increasing to 3,700 HP in later models.
One of the advantages of the radial engines was that they were usually air cooled which tended to improve survivability because they couldn’t be taken down by a hit to the radiator. The USN and USAAF, as you can see from the above lists, obviously valued this. OTOH, the liquid cooled V engines preferred by the British and also used on a decent number of American aircraft tended to be more efficient (in part because they had a vastly smaller leading edge and therefore less drag) and longer lasting because liquid cooled engines tend to have vastly better heat distribution.
