From: "David COOK hoursaway1@comcast.net" <flyrotary@lancaironline.net>
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Date: Fri, 9 May 2025 11:01:20 -0400 (EDT)
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Message-ID: <1619548171.76444.1746802880219@connect.xfinity.com>
In-Reply-To: <list-3994634@lancaironline.net>
References: <list-3994634@lancaironline.net>
Subject: Re: [FlyRotary] Dead Stick Landings?
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Not a dead stick but partial power, fuel map scramble. First time happened,=
 3500ft over airport, test flight, didn't know what problem was, just start=
ed running very rough and loss of power, 4800rpm was a sweet spot, was able=
 to maintain alt., was too hot/high, tried to slip RV6A to slow down, no jo=
y, circled and landed normal. Did not know at the time that I temp. fixed r=
ough eng. by switching to computer B that has a pre-programed fuel map. Lat=
er flight tests trying to cure MAP scramble ( with different wiring changes=
 )  I knew what was happening so would switch to computer B, and returned t=
o airport.  David

> On 05/09/2025 8:36 AM EDT Doug Lomheim rv9flyer13b@gmail.com <flyrotary@l=
ancaironline.net> wrote:
> =20
> =20
> I=E2=80=99m curious from any still on the list who have experienced a =E2=
=80=9Cdead stick=E2=80=9D landing situation, if the propellor stopped spinn=
ing or not when the engine failed? =20
> =20
> I also wonder if an engine has waning compression, if it would be more li=
kely to free wheel in an engine out situation?
> =20
> thanks. =20
> =20
> =20
> Doug=20
>=20

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<html>
 <head>=20
  <meta charset=3D"UTF-8">=20
 </head>
 <body>
  <div style=3D"font-size: 12pt; font-family: helvetica,arial,sans-serif; c=
olor: #333333;">
   <span style=3D"font-family: helvetica; font-size: 12pt;">Not a dead stic=
k but partial power, fuel map scramble. First time happened, 3500ft over ai=
rport, test flight, didn't know what problem was, just started running very=
 rough and loss of power, 4800rpm was a sweet spot, was able to maintain al=
t., was too hot/high, tried to slip RV6A to slow down, no joy, circled and =
landed normal. Did not know at the time that I temp. fixed rough eng. by sw=
itching to computer B that has a pre-programed fuel map. Later flight tests=
 trying to cure MAP scramble ( with different wiring changes )&nbsp; I knew=
 what was happening so would switch to computer B, and returned to airport.=
&nbsp; David</span>
  </div>=20
  <blockquote type=3D"cite">=20
   <div>
    On 05/09/2025 8:36 AM EDT Doug Lomheim rv9flyer13b@gmail.com &lt;flyrot=
ary@lancaironline.net&gt; wrote:
   </div>=20
   <div>
    &nbsp;
   </div>=20
   <div>
    &nbsp;
   </div> <span class=3D"" style=3D"font-size: large;">I=E2=80=99m curious =
from any still on the list who have&nbsp;experienced a&nbsp;=E2=80=9Cdead s=
tick=E2=80=9D landing situation, if the propellor stopped spinning or not&n=
bsp;when the engine failed? &nbsp;</span>=20
   <div class=3D"">
    <span class=3D"" style=3D"font-size: large;">&nbsp;</span>
   </div>=20
   <div class=3D"">
    <span class=3D"" style=3D"font-size: large;">I also wonder if an engine=
 has waning compression, if it would be more likely to free wheel in an eng=
ine out situation?</span>
   </div>=20
   <div class=3D"">
    <span class=3D"" style=3D"font-size: large;">&nbsp;</span>
   </div>=20
   <div class=3D"">
    <span class=3D"" style=3D"font-size: large;">thanks. &nbsp;</span>
   </div>=20
   <div class=3D"">
    <span class=3D"" style=3D"font-size: large;">&nbsp;</span>
   </div>=20
   <div class=3D"">
    <span class=3D"" style=3D"font-size: large;">&nbsp;</span>
   </div>=20
   <div class=3D"">
    <span class=3D"" style=3D"font-size: large;">Doug&nbsp;</span>
   </div>=20
  </blockquote>
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