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Subject: Re: [LML] Re: loss of power on takeoff
From: Don Karich <donkarich@gmail.com>
X-Original-To: Lancair Mailing List <lml@lancaironline.net>
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I share the experience of an older wiser former instructor regarding power
loss and return to field attempts. My friend (in addition to his bonanza
and aerobatic biplane) flys ultralights. He was trying at altitude to
determine the safe amount of excess altitude necessary to attempt a
full 180 degree turn to return to airport. After numerous high altitude
practices, he determined that 300 feet was minimum altitude for safe turn
around. eventually he tried it in the pattern and ended up stalling and
spinning it into the ground. Luckily escaped without life threatening
injurys. In his evaluation of why he was unable to replicated the 300 feet
was that when doing it at such a low altitude ones perspective of the
nearness of the ground does alter your thinking and makes you fly the plane
incorrectly. that urge to bcreak the law of physics must be irresistable.



On Fri, Jun 7, 2013 at 1:43 PM, Ted Noel <tednoel@cfl.rr.com> wrote:

>  Thank you very much. That spreadsheet is now in my POH.
>
> Ted Noel
> N540TF
>
> Attached is the spread sheet that was one I originally used for
> determining the best way to accomplish a cross country race turn over a
> pylon,  The formulae are from "Aeronautics for Naval Aviators", a very
> useful reference.  It does calcs for bank angles over 60 degrees.  I
> included time and distance numbers for various speeds and bank angles to
> determine the best configuration for an efficient turn.  I added some
> calculations for considering a power out descending turn back to the
> airport.  I have still been unable to find performance formulae for
> descending turns but then I haven't tried very hard.
>
>

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<div dir=3D"ltr">I share the experience of an older wiser former instructor=
 regarding power loss and return to field attempts. My friend (in addition =
to his bonanza and aerobatic biplane) flys ultralights. He was trying at al=
titude to determine the safe amount of excess altitude necessary to attempt=
 a =A0 =A0 full 180 degree turn to return to airport. After numerous high a=
ltitude practices, he determined that 300 feet was minimum altitude for saf=
e turn around. eventually he tried it in the pattern and ended up stalling =
and spinning it into the ground. Luckily escaped without life threatening i=
njurys. In his evaluation of why he was unable to replicated the 300 feet w=
as that when doing it at such a low altitude ones perspective of the nearne=
ss of the ground does alter your thinking and makes you fly the plane incor=
rectly. that urge to bcreak the law of physics must be irresistable.<div>
<br></div></div><div class=3D"gmail_extra"><br><br><div class=3D"gmail_quot=
e">On Fri, Jun 7, 2013 at 1:43 PM, Ted Noel <span dir=3D"ltr">&lt;<a href=
=3D"mailto:tednoel@cfl.rr.com" target=3D"_blank">tednoel@cfl.rr.com</a>&gt;=
</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex">
 =20
   =20
 =20
  <div text=3D"#000000" bgcolor=3D"#FFFFFF">
    Thank you very much. That spreadsheet is now in my POH.<br>
    <br>
    Ted Noel<br>
    N540TF<br>
    <font color=3D"#000000" face=3D"Arial">
      <div>=A0</div>
      <div>Attached is the spread sheet that=A0was one=A0I originally used
        for determining the best way to accomplish a cross country race
        turn over a pylon,=A0 The formulae are from &quot;Aeronautics for N=
aval
        Aviators&quot;, a very useful reference.=A0=A0It does calcs for ban=
k
        angles over 60 degrees. =A0I included time and distance numbers
        for various speeds and bank angles to determine the best
        configuration for an efficient turn.=A0 I added some calculations
        for considering a power out descending turn back to the
        airport.=A0 I have still been unable to find=A0performance formulae
        for descending turns but then I haven&#39;t tried very hard.<br>
      </div>
    </font><br>
  </div>

</blockquote></div><br></div>

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