REFLECTOR:Considering alternate engines
Brian Michalk
reflector@tvbf.org
Sat, 19 Apr 2003 11:19:28 -0500
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Hey, Kurt.
Yep, you are right if you have one of those "Tuff Turbo" kits with ball
bearing core. Most Av turbos are oil bearings, like mine. The wastegate is
also optional, but never worked very well ... I think Mooney had one with a
fixed wastegate position. Too much throttle at low altitude on takeoff and
bad things could/would happen.
However, yes, the turbo does add complexity. Just look at the plumbing
required. A year or two ago I tallied up the total time I spent on my
turbo, and was amazed at the fact that it took six months to fabricate the
exhaust manifold. I still tinker with it, because it has a wart or two that
I just don't like, I'll cut that part off and redo it, or find a hydroformed
tube from some speed shop that would work sooo much better.
If I were to do it over again, I'd send it out to a professional, but I
didn't really know what it needed to look like until I finished it. Now
that it's finished, it would be simple for a shop to make. All of the
dimensions are known.
Then there's the intercoolers. That took another bit of brainwaves to get
the engineering/ducting all worked out. It's like an unscripted ballet
except with metal. You sit under that engine thinking all the angles,
scenarios, temperature, vibration and serviceability problems through. Most
likely it's not right on the first time, but I get lucky once in a while.
Brian Michalk <http://www.michalk.com>
Life is what you make of it ... never wish you had done something.
Aviator, experimental aircraft builder, motorcyclist, SCUBA diver
musician, home-brewer, entrepreneur and mostly single
-----Original Message-----
From: reflector-admin@tvbf.org [mailto:reflector-admin@tvbf.org]On Behalf
Of NMFlyer1@aol.com
Sent: Saturday, April 19, 2003 10:27 AM
To: reflector@tvbf.org
Subject: Re: REFLECTOR:Considering alternate engines
Actually, there are a lot more moving parts in a turbo than "1."
All the rollers in the bearings are moving parts and subject to failure.
It is much less likely that the actual boost vane will fail, than a bearing
or seal, or wastegate. The extra heat involved in the turbo installation
also increases heat near other parts and therefor increases their "possible"
failure rate.
Don't get me wrong.. I think turbos are great... just keep all the little
details in perspective.
Kurt Winker
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<DIV><SPAN class=3D495391016-19042003><FONT face=3DArial color=3D#0000ff =
size=3D2>Hey,=20
Kurt.</FONT></SPAN></DIV>
<DIV><SPAN class=3D495391016-19042003><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D495391016-19042003><FONT face=3DArial color=3D#0000ff =
size=3D2>Yep,=20
you are right if you have one of those "Tuff Turbo" kits with ball =
bearing=20
core. Most Av turbos are oil bearings, like mine. The =
wastegate is=20
also optional, but never worked very well ... I think Mooney had one =
with a=20
fixed wastegate position. Too much throttle at low altitude on =
takeoff and=20
bad things could/would happen.</FONT></SPAN></DIV>
<DIV><SPAN class=3D495391016-19042003><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D495391016-19042003><FONT face=3DArial color=3D#0000ff =
size=3D2>However, yes, the turbo does add complexity. Just look at =
the=20
plumbing required. A year or two ago I tallied up the total time I =
spent=20
on my turbo, and was amazed at the fact that it took six months to =
fabricate the=20
exhaust manifold. I still tinker with it, because it has a wart or =
two=20
that I just don't like, I'll cut that part off and redo it, or find a=20
hydroformed tube from some speed shop that would work sooo much=20
better.</FONT></SPAN></DIV>
<DIV><SPAN class=3D495391016-19042003><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D495391016-19042003><FONT face=3DArial color=3D#0000ff =
size=3D2>If I=20
were to do it over again, I'd send it out to a professional, but I =
didn't really=20
know what it needed to look like until I finished it. Now that =
it's=20
finished, it would be simple for a shop to make. All of the =
dimensions are=20
known.</FONT></SPAN></DIV>
<DIV><SPAN class=3D495391016-19042003><FONT face=3DArial color=3D#0000ff =
size=3D2></FONT></SPAN> </DIV>
<DIV><SPAN class=3D495391016-19042003><FONT face=3DArial color=3D#0000ff =
size=3D2>Then=20
there's the intercoolers. That took another bit of brainwaves to =
get the=20
engineering/ducting all worked out. It's like an =
unscripted ballet=20
except with metal. You sit under that engine thinking all the =
angles,=20
scenarios, temperature, vibration and serviceability problems =
through. =20
Most likely it's not right on the first time, but I get lucky once in a=20
while.</FONT></SPAN></DIV>
<DIV> </DIV>
<P><FONT size=3D2> Brian Michalk <<A =
href=3D"http://www.michalk.com/"=20
target=3D_blank>http://www.michalk.com</A>><BR>Life is what you make =
of it ...=20
never wish you had done something.<BR>Aviator, experimental aircraft =
builder,=20
motorcyclist, SCUBA diver<BR>musician, home-brewer, entrepreneur and =
mostly=20
single<BR> </FONT> </P>
<BLOCKQUOTE=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #0000ff 2px =
solid">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B> =
reflector-admin@tvbf.org=20
[mailto:reflector-admin@tvbf.org]<B>On Behalf Of=20
</B>NMFlyer1@aol.com<BR><B>Sent:</B> Saturday, April 19, 2003 10:27=20
AM<BR><B>To:</B> reflector@tvbf.org<BR><B>Subject:</B> Re:=20
REFLECTOR:Considering alternate engines<BR><BR></FONT></DIV><FONT=20
face=3Darial,helvetica><FONT lang=3D0 face=3DArial size=3D2=20
FAMILY=3D"SANSSERIF">Actually, there are a lot more moving parts in a =
turbo than=20
"1." <BR>All the rollers in the bearings are moving parts and =
subject to=20
failure. It is much less likely that the actual boost vane will fail, =
than a=20
bearing or seal, or wastegate. The extra heat involved in the =
turbo=20
installation also increases heat near other parts and therefor =
increases their=20
"possible" failure rate. <BR><BR>Don't get me wrong.. I think =
turbos are=20
great... just keep all the little details in perspective. =
<BR><BR>Kurt=20
Winker</FONT> </FONT></BLOCKQUOTE></BODY></HTML>
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