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<DIV><FONT face=Arial size=2>Or involuntary
reflexes
Nat</FONT></DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=bob@toprudder.com href="mailto:bob@toprudder.com">Bob Richards</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=nsrca-discussion@lists.nsrca.org
href="mailto:nsrca-discussion@lists.nsrca.org">NSRCA Mailing List</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, October 15, 2007 4:01
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [NSRCA-discussion] Weather
Vane or Crab</DIV>
<DIV><BR></DIV>
<DIV>Funny, I don't think anyone has mentioned coriolis effect yet. :-)</DIV>
<DIV> </DIV>
<DIV>Bob R.</DIV>
<DIV><BR><BR><B><I>Ron Lockhart <<A
href="mailto:ronlock@comcast.net">ronlock@comcast.net</A>></I></B>
wrote:</DIV>
<BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Assuming
earth is flat - well of course! Same as aircraft carrier. <VBG><BR>And in
this case agreeing with Georgie, expect for a few mountains.<BR><BR>Later,
Ron<BR><BR>----- Original Message ----- <BR>From: "george w. kennie"
<GEOBET@GIS.NET><BR>To: "NSRCA Mailing List"
<NSRCA-DISCUSSION@LISTS.NSRCA.ORG><BR>Sent: Monday, October 15, 2007 9:46
AM<BR>Subject: Re: [NSRCA-discussion] Weather Vane or Crab<BR><BR><BR>>
<BR>> Welllll,.......except for a few
mountains...................<BR>> <BR>> <BR>> ----- Original
Message ----- <BR>> From: "James Oddino" <JODDINO@SOCAL.RR.COM><BR>>
To: "NSRCA Mailing List" <NSRCA-DISCUSSION@LISTS.NSRCA.ORG><BR>> Sent:
Sunday, October 14, 2007 8:50 PM<BR>> Subject: Re: [NSRCA-discussion]
Weather Vane or Crab<BR>> <BR>> <BR>> > Ron, you are assuming
the earth is flat. (vbg)<BR>> > <BR>> > Jim<BR>> >
<BR>> > <BR>> > On Oct 13, 2007, at 9:42 AM, Ron Lockhart
wrote:<BR>> > <BR>> >> Hi Ken,<BR>> >><BR>>
>> I think my original phrasing is correct, but let me try restating
in<BR>> >> different words and using<BR>> >> some specific
examples- This concept would be sooo much easier to <BR>> >>
describe<BR>> >> and understand<BR>> >> with the white
board and beer, which I agree is looking better all <BR>> >> the
time<BR>> >> <VBG>)<BR>> >><BR>> >> Case 1. No
Wind.<BR>> >> Pilot desires airplane to go to a point that is
directly north, or 360<BR>> >> degrees from present
position.<BR>> >> There is no wind.<BR>> >> Durring flight
airplane the pilot should fly the airplane on <BR>> >> heading
360<BR>> >> degrees. Track will be 360 degrees.<BR>> >>
Airplane will get to desired point.<BR>> >><BR>> >> Case
2. There is wind from west across desired direction of <BR>> >>
flight- Pilot<BR>> >> MISSES destination.<BR>> >> Pilot
desires airplane to go a point that is directly north, or 360 <BR>>
>> degrees<BR>> >> from present position.<BR>> >>
There is wind from 270 degrees (from left of airplanes intended
track)<BR>> >> If pilot flys airplane on heading 360 degrees, it
will not get to <BR>> >> desired<BR>> >> point, it will
get to a point to right (or east)<BR>> >> of the intended point.
During flight airplane heading (direction <BR>> >> it is<BR>>
>> pointed) will be 360 degrees. Track will not<BR>> >> be
360, it will be something to the right, such as 010 degrees. No <BR>>
>> weather<BR>> >> vane is present. The 010 track<BR>>
>> is caused not by a weathervane effect, but by the body of air
<BR>> >> moving from<BR>> >> west to east while airplane
progresses<BR>> >> through it on north heading.<BR>>
>><BR>> >> Case 3 Wind direction still across desired
direction of flight- <BR>> >> Pilot FLYS<BR>> >> A CRAB
ANGLE, and hits destination.<BR>> >> Stubborn pilot still wants to
go to a point directly north of present<BR>> >> position, despite
wind from 270 degrees (west).<BR>> >> Durring flight airplane the
pilot should choose to fly the airplane on<BR>> >> heading 360
degrees, MINUS some number<BR>> >> of degrees. Lets say pilot
guesses 10 degree correction, so pilot <BR>> >> flys<BR>>
>> airplane on heading 350 degrees.<BR>> >> This is a pilot
choice to fly heading 350. The body of air moving <BR>> >> from
west<BR>> >> to east will not do it for the pilot.<BR>> >>
During flight heading will be 350 degrees. Track will be 360 degrees<BR>>
>> (ASSUMING that the pilots<BR>> >> "Guess" of a 10 degree
correction was right.) Airplane will get to <BR>> >>
desired<BR>> >> point. During this flight, (and in<BR>> >>
Case 1 and 2) a yaw string would be straight, no wind hits side of <BR>>
>> airplane.<BR>> >><BR>> >> I'll have a Coors
lite.<BR>> >><BR>> >> Later, Ron<BR>> >><BR>>
>> ----- Original Message -----<BR>> >> From: "Ken Thompson"
<MRANDMRST@COMCAST.NET><BR>> >> To: "NSRCA Mailing List"
<NSRCA-DISCUSSION@LISTS.NSRCA.ORG><BR>> >> Sent: Saturday, October
13, 2007 9:37 AM<BR>> >> Subject: Re: [NSRCA-discussion] Weather
Vane or Crab<BR>> >><BR>> >><BR>> >>> Hey
Ron,<BR>> >>><BR>> >>> Would I be correct in
assuming your quote in parenthesis should read,<BR>> >>> "During
that flight, airplane "intended" heading and track will <BR>>
>>> not be the<BR>> >>> same", or are you pointing out
that a plane will "somewhat" crab, <BR>> >>> on it's<BR>>
>>> own, in a crosswind?<BR>> >>><BR>> >>>
BTW: I like the white board and beer idea;-)<BR>> >>><BR>>
>>> Ken<BR>> >>><BR>> >>> ----- Original
Message -----<BR>> >>> From: "Ron Lockhart"
<RONLOCK@COMCAST.NET><BR>> >>> To: "NSRCA Mailing List"
<NSRCA-DISCUSSION@LISTS.NSRCA.ORG><BR>> >>> Sent: Saturday,
October 13, 2007 8:16 AM<BR>> >>> Subject: Re:
[NSRCA-discussion] Weather Vane or Crab<BR>> >>><BR>>
>>><BR>> >>>><BR>> >>>> If a pilot is
flying to a specific point and points a trimmed <BR>> >>>>
airplane<BR>> >>>> directly at that point, and there is
wind<BR>> >>>> somwhat perpendicular to the intended flight
track over the <BR>> >>>> ground the<BR>> >>>>
airplane will not get to that point.<BR>> >>>> The airplane
will get to a point down wind of the intended point.<BR>> >>
(During<BR>> >>>> that flight, airplane heading and<BR>>
>>>> track will not be the same. There will be no wind hitting
side of<BR>> >> plane.<BR>> >>>> A<BR>>
>>>> yaw string on nose will be<BR>> >>>>
straight down fuse) I suppose we just lost a few folks here....<BR>>
>>>> (sigh)<BR>> >>><BR>> >>> All this
would be a bunch easier with a white board and beer. <VBG><BR>>
>>>><BR>> >>>> Later, Ron Lockhart<BR>>
>>>><BR>> >>>><BR>> >>>> -----
Original Message -----<BR>> >>>> From: "Ken Thompson"
<MRANDMRST@COMCAST.NET><BR>> >>>> To: "NSRCA Mailing List"
<NSRCA-DISCUSSION@LISTS.NSRCA.ORG><BR>> >>>> Sent: Saturday,
October 13, 2007 12:48 AM<BR>> >>>> Subject: Re:
[NSRCA-discussion] Weather Vane<BR>> >>>><BR>>
>>>><BR>> >>>>> Jim and all,<BR>>
>>>>><BR>> >>>>> Most of us realize the
plane will do as you and others have <BR>> >>>>>
described,<BR>> >> my<BR>> >>>>> only point in
questioning this is...is it called "weathervaning" <BR>>
>>>>> while<BR>> >>>> it's<BR>>
>>>>> in the air, or is it called "wind induced yaw or
crab"?<BR>> >>>>><BR>> >>>>> Best to you
in your recovery.<BR>> >>>>><BR>> >>>>>
Ken<BR>> >>>>><BR>> >>>>> ----- Original
Message -----<BR>> >>>>> From: "James Oddino"
<JODDINO@SOCAL.RR.COM><BR>> >>>>> To:
<ALBERJI@CHARTER.NET>; "NSRCA Mailing List"<BR>> >>>>>
<NSRCA-DISCUSSION@LISTS.NSRCA.ORG><BR>> >>>>> Sent:
Friday, October 12, 2007 7:14 PM<BR>> >>>>> Subject: Re:
[NSRCA-discussion] Weather Vane<BR>> >>>>><BR>>
>>>>><BR>> >>>>> If it does, this is
my<BR>> >>>>>> definition of weathervaning.<BR>>
>>>>>><BR>> >>>>>> I'm recovering
from an emergency appendectomy so I'm depending <BR>>
>>>>>> on all<BR>> >>>>>> you other
guys to go try a cross wind stall turn with no rudder<BR>>
>>>>>> command tomorrow and report on your
results.<BR>> >>>>>><BR>> >>>>>>
Best Regards, Jim O<BR>> >>>>><BR>>
>>>>><BR>> >>>>><BR>>
>>>>> _______________________________________________<BR>>
>>>>> NSRCA-discussion mailing list<BR>>
>>>>> NSRCA-discussion@lists.nsrca.org<BR>>
>>>>>
http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR>>
>>>>><BR>> >>>><BR>> >>>>
_______________________________________________<BR>> >>>>
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>>><BR>> >>>
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>><BR>> >>
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