[NSRCA-discussion] Weather Vane

[Nat Penton]

It is considered a sideslip any time you give the airplane rudder - also if 
you roll in knife edge and dont give rudder.

Any air motion relative to the airplane will affect the airplane.

----- Original Message ----- 
From: "James Oddino" <joddino at socal.rr.com>
To: <alberji at charter.net>; "NSRCA Mailing List" 
<nsrca-discussion at lists.nsrca.org>
Sent: Saturday, October 13, 2007 5:28 PM
Subject: Re: [NSRCA-discussion] Weather Vane


>I think we've found our expert.  Two questions:
>
> 1) Is it not considered a sideslip if the relative wind is on the
> leeward side?
>
> 2) How does a gust cause the plane to yaw when a steady wind will not?
>
> Thanks in advance, Jim
>
>
>
>
> On Oct 12, 2007, at 6:36 PM, Jim Alberico wrote:
>
>>
>>>
>>> Back to the vertical portion of the stall turn with a pattern
>>> plane, only this time with locked rudder.  We all agree it
>>> will drift off the track as it slows to a stop.  The question
>>> is, will it yaw into the wind on its own as it slows to a
>>> stop?  If it does, this is my definition of weathervaning.
>>>
>>
>> It will turn into the wind only if it "sees" a relative wind on the
>> windward
>> side (i.e., a sideslip).  If the fuse is truly pointed straight up,
>> and is
>> allowed to track downwind at the speed of the crosswind, then there
>> will be
>> no sideslip and thus no turning.  Again, this is the idealized case
>> of a
>> steady wind.  The story is different for a gust ... Injecting your
>> fixed
>> missile into the crosswind is equivalent to a gust.
>>
>>>
>>
>> Jim
>>
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