PPRuNe Forums - View Single Post - Entering autos: discussion split from Glasgow crash thread
Old 17th Dec 2013, 22:03
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Thomas coupling
 
Join Date: Aug 2000
Location: UK
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DB: Good call and well done for coming out Don't you feel better now?
The CIA will now go away and stop bullying you.
Peter (and his cronies nubian and fn1100). Here is a a little quiz for you:

1. During your departure whilst flying through 150' and 50kts, the donk stops. Do you (a) dump the collective first or (b) select aft cyclic first to contain Nr?

2. In the hover the donk stops. Do you (a) dump the collective first or (b) select aft cyclic to contain Nr?

3. You are doing aerial work and operating inside the H/V curve. The donk stops, do you (a) dump the collective first or (b) select aft cyclic first to minimse Nr decay?

4. You are a police helicopter orbiting @ 30kts over the city at 500'. As you pass through the downwind heading, one of the donks stops (or if in the USA: the only donk stops). Do you (a) lower the collective or (b) select aft cyclic to conserve Nr?

5. During a helipad departure (backwards) as you are passing up and backwards through 30 feet, the donk stops. Do you (a) select collective down or (b) select aft cyclic to conserve Nr.

Now if the aft cyclic brigade chooses (a) in any of the above, it blows your argument out of the water.
Do me a big big favour would you?
Qualify your statement to read thus:
IF in the cruise or at significant forward speed, should the Nr decay for any reason whatsoever, the pilot can select down collective and/or aft cyclic as part of the immediate leading actions.

That way Peter it leaves absolutely no ambiguity whatsoever to your american pilots as to what to do during a decaying Nr scenario. The ab initio's and naive ones amongst your fraternity cannot afford to be misled at their embryonic stage of flying training. It seems that UK pilots and the FAA are already up to speed with this recovery process.

And finally, to clear up one more ambiguity; provided the Nr remains in the green, it will never decay any further of its own volition. Thus if one was to select down collective ONLY during entry to an EOL and that selection arrested the decaying Nr such that it remained inside the green (or above min Nr)...IT WOULD NOT CONTINUE TO DECAY. And that is because you would be in autorotation.

For the hard of hearing: One doesnt have to 'flare' by selecting aft cyclic to "get air up under the disc" (). Lowering the collective automaticlly induces air below, to go through the disc...is that too difficult for some newbies to understand.

Did anyone understand Hilberg's post
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