Procrastintor
Senior Airman
Daaaaang Flyboy, that's probably the most beautiful thing I have seen all day.
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Greg, I didn't know this is what you do. Do me a favor. Go to the Hellcat and Spitfire thread and give me an opinion on my last question. It ought to be on the last page. Thanks.Hi Zjtins,
I might point out that the Fiat R A 1050 Tifone was a license-built copy of the DB 605A-1 and never quite made the power of the original DB engines. The Japanese Aichi Kokuki AE12A Atsuta was a license-built copy of the DB 601A engine that also never quite made the power the DB did and was so difficult to copy, tune, and maintain that they abandoned it and switched back to radial engines.
Copies are rarely exact and performance differences can be on both sides. That is, the copy can perform better, worse, or about the same as the original. It depends on who is copying and how skilled they are at design. My current project is a rare Bell YP-59A Airacomet with GE I-16 engines. These were the first American improvement to the Whittle jet engine (the GE I-A was a copy of the Whittle engine, the I-16 was our first improvement). The original Whittle engine made 1,200 – 1,250 pounds of thrust and the I-16 makes 1,600 – 1,650 with only minor changes. Later the same engine with minor tweaking made 2,000 pounds of thrust as the J-31 when the jet engine naming scheme was put into place.
Our museum (Planes of Fame) happens to have a real, live Mitsubishi J8M Shusui rocket interceptor (1 of only 7 ever built) as well as a real, live German Me 163 rocket engine (and a real WWII German RATO unit to boot). The Japanese rocket engine is close, but not quite an exact copy.
We also have a unique individual from Japan who comes over to the USA about 3 times per year just to help work on the planes. He is trying his best to help with our Aichi D3A Val dive bomber that is slowly coming along, We need to finish some other things and then get to it. He was, in fact, here when we took the gas tanks out of our Yokoshuk D4Y Judy dive bomber that we restored. His father worked at the Yokosuka arsenal and had signed one of the fuel tanks from our Judy! He said his father told him the Atsuta was as an exact copy of the DB 601A as they could make … and it didn't exactly work well. In service the Japanese mechanics could not keep it in tune. They were all trained on radials.
Too many solid sources confirm the Japanese jet engine to be based on German documents for it to be much in doubt.
Just as an aside, we also have a Juno 004 and a real Me 163, too, and used to have an Me 262 before we sold it to Paul Allen. We never have had a Japanese jet engine as used on the Kikka, but have the drawings. They are almost exactly the same as German drawings ... except for the Japanese writing on them, of course. Minor changes.
Also, we fly the only Mitsubishi A6M5 Model 52 Zero in the world that still uses the original Japanese engine (a Nakajima Sakae 21) and propeller. The prop is a license-built copy of a Hamilton-Standard and the parts look interchangeable ... but we haven't tried it since the prop is balanced, is not leaking, and is flying just fine. The splines are standard. So we KNOW they could copy things quite exactly since we are flying WWII Japanese copies of several mechanical items today on WWII Japanese aircraft. We'd LOVE to find real Japanese engines for our D3A Val but might have to use an American radial when we get there if we can't find two. The museum doesn't fly any plane unless we have a minimum of two engines. If you break it, you have to get it home somehow ...
FYI if you read your pilots manual or CMM some of what I do is in those.
including the the required metallurgy, surface hardness and finish, and tolerances, blade profile etc.
You have shown nothing... you claimed it was a copy with no proof. Even a reverse engineered version today is not a copy.
I believe you can find transparency care in both flight manuals and maintenance manuals.I am laughing so hard right now!
I don't have Max Hastings' book "Retribution" before me (it was a library book) but Max makes the claim that President Truman never made the decision to drop the bomb on Japan.
And I was pondering this last night......It does seem that the dropping of the second bomb surprised Truman, but it wouldn't be the first time that one green light was interpreted as a whole series down the strip by military men. I think it highly probable that the THIRD bomb would have been dropped had Truman not stopped it...
Col. Tibbits and a crew were back in the US to pick up some of the components of another bomb when Japan surrendered.And I was pondering this last night...
What was the plan if the Japanese did not surrender after the two atomic bombs had been dropped? The U.S. did not have a ready reserve of atom bombs, though more could be assembled over time.
With the Japanese digging in across the homeland and a considerable force still on the Asian mainland, what would be the next step since the "Genie had been let out of the bottle"?
I've not read that Hastings book but am very familiar with much of his writing.
I would be astounded if that was Hasting's conclusion. Foreign Affairs, Vol. XXV, No. 2 (January, 1957) is probably one of the most complete accounts of the decision making process. Along with the various memoirs of those involved (like Groves, Leahy, King, Stimson and of course Truman himself) and the various hearings held by Congress the evidence that ultimately the decision to use the weapon(s) was Truman's and his alone is hard to refute.
There was a consultation process of course, no such momentous decision is made in a democracy without seeking opinion as widely as possible given the security limitations. The so called "Interim Committee" made a compelling report in favour of using the weapon but it was Truman who had to make the decision. He was President and as the sign on his desk famously said "The Buck Stops Here."
It does seem that the dropping of the second bomb surprised Truman, but it wouldn't be the first time that one green light was interpreted as a whole series down the strip by military men. I think it highly probable that the THIRD bomb would have been dropped had Truman not stopped it.
Cheers
Steve
Col. Tibbits and a crew were back in the US to pick up some of the components of another bomb when Japan surrendered.
Thank you. Copy and similar to at totally different. A copy means you have all the information needed to manufacture the parts then assemble the unit. Of course they used the photos WITH THEIR OWN knowledge to do what they could. Like I said they did what they could but that is not a copy and it ended up less capable because it was not a copy.The Japanese rocket engine is close, but not quite an exact copy.
Pilots do not design engines, engineers do.
And so far you have proven to be neither....
I do not have to, just call Boeing or Airbus and ask to work for them as a designer and your credentials are solely as a pilot and see how far you get.
And yes they do have engineers who are also pilots and but most are not.
Quote Originally Posted by zjtins View Post
FYI if you read your pilots manual or CMM some of what I do is in those.
Clean windshields?
What airline do you fly or work for? If the most important information you glean out of pilots manual or CMM are clean windshields I want to fly any other airline.