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Message-ID: <1c23473f0602112236i1b1daf3ds2c5914a94f9df8c9@mail.gmail.com>
Date: Sat, 11 Feb 2006 22:36:07 -0800
From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Another rotary failure
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Wow Chuck, Very sorry to hear.  I certainly know what you are going
through.  I think it is even more worrisome that it just happened out of th=
e
blue like that.  It was more justifiable for me because of coolant issues.
But for you to have the same problem twice, without a known cause - and not
even running a turbo.  That troubles me.

I wish I was in a position to offer some help - other than recent experienc=
e
in tearing apart a rotary...

Dave Leonard


On 2/11/06, Chuck Dunlap <crayd@cableone.net> wrote:
>
> Sorry I didn't make to Bill Eslick's for the Rotorfest, I missed by about
> one hour. About 30 miles north of San Angelo TX the RPM suddenly dropped =
and
> I could not restore it with any of my emergency procedures. GPS told me
> nearest airport was Robert Lee about 15 miles away. I headed there and
> landed without incident.
> Turning the prop by hand shows almost zero compression in one rotor,
> indicating bad/broken apex seals, quite similar to my engine-out experien=
ce
> 2 1/2 years ago which caused a forced landing near the Grand Canyon. This
> time the vibration was not quite as bad, and the RPM dropped to around 43=
00
> which was still not enough to maintain altitude.  I called my friend with=
 a
> Glasair and he cam got me and took me home. I will have to find some time=
 to
> build another motor and drive 12 hours back there and swap motors. Or I
> might drive there, remove the wings and trailer it back, have not decided
> yet.
> My good friend/mentor/flight instructor is trying to talk me into going
> back to a Lycosaurus, and I have to think of some good reasons not to. Un=
til
> I get the motor back and torn apart, I wont know what caused the failure,
> but I will post anything that I find.
>
> Regards
> Chuck Dunlap
> RV-6 13B 535 hours
>



--
Dave Leonard
Turbo Rotary RV-6 N4VY
http://members.aol.com/_ht_a/rotaryroster/index.html
http://members.aol.com/_ht_a/vp4skydoc/index.html

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<div>Wow Chuck, Very sorry to hear.&nbsp; I certainly know what you are goi=
ng through.&nbsp; I think it is even more worrisome that it just happened o=
ut of the blue like that.&nbsp; It was more justifiable for me because of c=
oolant issues.&nbsp; But for you to have the same problem twice, without a =
known cause - and not even running a turbo.&nbsp; That troubles me.
</div>
<div>&nbsp;</div>
<div>I wish I was in a position to offer some help - other than recent expe=
rience in tearing apart a rotary...</div>
<div>&nbsp;</div>
<div>Dave Leonard<br><br>&nbsp;</div>
<div><span class=3D"gmail_quote">On 2/11/06, <b class=3D"gmail_sendername">=
Chuck Dunlap</b> &lt;<a href=3D"mailto:crayd@cableone.net">crayd@cableone.n=
et</a>&gt; wrote:</span>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div><font face=3D"Arial" size=3D"2"><span>Sorry I didn't make to Bill Esli=
ck's for the Rotorfest, I missed by about one hour. About 30 miles north of=
 San Angelo TX the RPM suddenly dropped and I could not restore it with any=
 of my emergency procedures. GPS told me nearest airport was Robert Lee abo=
ut 15 miles away. I headed there and landed without incident.
</span></font></div>
<div><font face=3D"Arial" size=3D"2"><span>Turning the prop by hand shows a=
lmost zero compression in one rotor, indicating bad/broken apex seals, quit=
e similar to my engine-out experience 2 1/2 years ago which caused a forced=
 landing near the Grand Canyon. This time the vibration was not quite as ba=
d, and the RPM dropped to around 4300 which was still not enough to maintai=
n altitude.&nbsp; I called my friend with a Glasair and he cam got me and t=
ook me home. I will have to find some time to build another motor and drive=
 12 hours back there and swap motors. Or I might drive there, remove the wi=
ngs and trailer it back, have not decided yet.
</span></font></div>
<div><font face=3D"Arial" size=3D"2"><span>My good friend/mentor/flight ins=
tructor is trying to talk me into going back to a Lycosaurus, and I have to=
 think of some good reasons not to. Until I get the motor back and torn apa=
rt,&nbsp;I wont know what caused the failure, but I will post anything that=
 I find.
</span></font></div>
<div><font face=3D"Arial" size=3D"2"><span></span></font>&nbsp;</div>
<div><font face=3D"Arial" size=3D"2"><span>Regards</span></font></div><span=
 class=3D"sg">
<div><font face=3D"Arial" size=3D"2"><span>Chuck Dunlap</span></font></div>
<div><font face=3D"Arial" size=3D"2"><span>RV-6 13B 535 hours</span></font>=
</div></span></blockquote></div><br><br clear=3D"all"><br>-- <br>Dave Leona=
rd<br>Turbo Rotary RV-6 N4VY<br><a href=3D"http://members.aol.com/_ht_a/rot=
aryroster/index.html">
http://members.aol.com/_ht_a/rotaryroster/index.html</a><br><a href=3D"http=
://members.aol.com/_ht_a/vp4skydoc/index.html">http://members.aol.com/_ht_a=
/vp4skydoc/index.html</a>=20

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