Text 8555, 68 rader
Skriven 2008-12-14 17:48:12 av Earl Croasmun (1:124/311)
     Kommentar till en text av Bob Klahn
Ärende: RE: Excellent summation
===============================
~> ~>>  EC> I assumed that you would attempt to use vector analysis
~> ~>>  EC> when I asked the earlier question about making a level turn
~> ~>>  EC> without losing airspeed.
 
~> ~>>  If you had assumed that you would have said so.
 
~>  EC> Your assumption is as weak as your grasp of physics.
 
~>  That was a conclusion, not an assumption.

It was an assumption, and an incorrect one.  You are still ducking the
question.

~> ~>>  EC> But instead of taking an approach
~> ~>>  EC> that would lead you to expose your error, you ducked the
~> ~>>  EC> question completely.
 
~> ~>>  Since the error was yours, I had no reason to duck the question.
 
~>  EC> Once again you give a false paraphrase.  I didn't say you
~>  EC> had a REASON to duck the question, although it is becoming
~>  EC> more and more likely that you do have a reason.  I said you
~>  EC> DID duck the question.  Do you really not understand the
~>  EC> difference?
 
~>  Yes.

The difference is rather obvious.  But it is interesting that, when you
have to admit a false paraphrase or admit ignorance you choose ignorance.

~>  I had no reason to duck the question, and I didn't.

You still are.

~>  EC> So, going back once again to your disagreement with Ceppa,
~>  EC> McCain was attempting to make a level turn without
~>  EC> increasing his power.
 
~>  You didn't post that in your original msg.

Wrong again.  It was in the thread from the start.

~>  EC> Ceppa said McCain lost airspeed
~>  EC> while turning.  You said that a pilot in that situation can
~>  EC> make a turn without losing any airspeed at all.  I tried
~>  EC> some time back to get you to explain what he would have to
~>  EC> do to make the turn without losing any airspeed in that
 
~>  Just make the turn and adjust his elevators to maintain his
~>  airspeed.

The question (and you have had a month to work on it) was about "exactly
how a plane can be flying level at a given airspeed and a given power
setting, and then make a level turn, at the same power setting, and NOT
lose any airspeed?"  Unfortunately, your answer is to reduce drag by
reducing the angle of attack.  That might keep the airspeed up and thus
avoid a stall, but loses vertical lift in the turn and thus a descending
turn.  Two problems.  First, the inquiry said he stalled, not that he
descended in an unstalled turn until hitting the water.  Second, if he had
lost lift and gone into a descending turn rather than a level turn, as he
is descending the stall speed would be lower that it would for the level
turn.  Now, if you go back to the news stories that dealt with the Navy
report, you will be able to figure out what he did and what he didn't do
during the turn.

 
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