Here is some more proof that Lu gets his information from rumor, not from facts, and that Lu knows little of what he posts.
We have seen Lu repeat his false assertion that the main gearbox of the S-76 was made by "mistake" and that the servos are in the wrong place as a result of this mistake. He even said that the designers "screwed up" in one post. That is an illustration of the kind of crap that Lu has floating in his brain, all the rumor and inuendo that a simple mechanic picks up in 50 years of hanging around the snack bar as real pilots and real engineers talk. All that drivel then circulates around for years, gets confused, and then appears in his posts.
I was on the design team 2 years before we flew the first flight of the S-76. I helped make the decision to incorporate 17 degress of Delta-3 into the main rotor to create a better ride for the occupants in cruise flight in turbulence. This decision was made after the main gearbox castings were designed, and after the supplier of these castings was making his casting tools. If we changed the gearbox, we would have delayed the whole program, so we decided to use the upper deck controls to correct the cyclic phasing (all this is too much for Lu, it is exactly like the legendary 18 degrees of the Robinson that causes him to foam at the mouth).
The Chief Designer of the S-76 was a great engineer named Al Albert, who knew more about helicopters than Lu Zuckerman knows about ANYTHING. Al designed the S-67 Blackhawk, which was the fastest helicopter ever for a period of about 10 years, the S-76 which is a legend, the UH-60 Black Hawk, and the S-69 ABC (the absolutely fastest helicopter ever). To say that Al Albert, who died last year, made a "mistake", and "screwed up" is easy for an ignorant blowhard like Lu, and is simple proof that Lu knows only about half of what he posts on this newsgroup. The problem is that Lu does not know which half of his utterances is fact and which half is bull, and when someone does know, Lu refuses to admit it, either.
Remember a few months ago when Lu would post drivel about how he knew that the designers were making mistakes and that he was a hero for helping save lives with his proclamations? Thank the Lord that garbage from Lu has died down, mostly because this group now knows what those design teams found out (the hard way for all of us). Lu only knows about half of what he says, and he doesn't know which half. When told which half, he argues and fumes, and then blames someone else.
Flight Safety,
Regrading CF, the best way to describe what we are discussing is to note that the fellow's arm in your discussion is actually getting tired because it is continually throwing the weight around the circle. It is tired not because there is a force the weight is exerting on him. If he let go, the weight would merely continue on its path. If he holds on, the weight is pulled into the circle he is making. In other words, the inertia of the dumbell is what he is fighting.
There is an appearant CF, but that is only needed to accelerate the weight around the circle.
[ 17 December 2001: Message edited by: Nick Lappos ]