Orville in later life was a CEO/businessman in the airplane industry (his company https://en.wikipedia.org/wiki/Curtiss-Wright is still in business technically). They manufactured all sorts of military aircraft and engines, including the P-36 fighter, so he certainly does not appear adverse to aerial warfare.

He had this specifically to say, which may answer some of your questions directly:

"We dared to hope we had invented something that would bring lasting peace to the earth. But we were wrong....No, I don't have any regrets about my part in the invention of the airplane, though no one could deplore more than I do the destruction it has caused. I feel about the airplane much the same as I do in regard to fire. That is I regret all the terrible damage caused by fire, but I think it is good for the human race that someone discovered how to start fires and that we have learned how to put fire to thousands of important uses."

After the war his company failed to transition into effective jet aircraft development, and lost most contracts and business. The company had been good at upgrades and improvements, but lagged in R&D regarding new frames and jet propulsion.

He was a statesman, and sat on various aeronautic committees and boards officially, including the NACA which later became NASA, and other organizations tied to the aeronautic industry and piloting.

We do have a lot of his letters and correspondence that could likely deduce his personal opinions on rockets and nuclear bombs - ill leave this to someone else.

Any idea about how his brother, Wilbur, felt? I understand they brought somewhat different perspectives to their collaboration.

If there are any Brazilian historians, perhaps they can shed light on Santos-Dumont who committed suicide in 1932, in part due to knowing his invention was being used in warfare.

Wow, a question I somewhat have an answer to.

Orville did an interview with Ohio's Dayton Journal Herald in late 1943, where he discussed his thoughts on aviation at the time.

It's a very short interview, so I won't go and completely summarize the piece, but he basically sounded very excited about the future of aviation and about the rapid technological acceleration that the industry had undergone.

http://www.daytonhistorybooks.com/orville_wright_looks_ahea.html

This might count as requiring a new thread, but would anyone be able to answer the same questions about Jiro Horikoshi or other designers of the A6M zero, specifically its use in kamikaze attacks? I've asked this question before but failed to get any responses, this thread is quite similar.