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1. 06:51 AM - Re: Lycoming Thunderbolt Engines (Archie)
2. 05:24 PM - Re: Lycoming Thunderbolt Engines (n801bh@netzero.com)
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| Subject: | Re: Lycoming Thunderbolt Engines |
Two companies tried that in aviation, and failed.
There are a series of parameters that do not directly apply to aircraft
use,
but for the most part, why re invent the wheel, when the racing industry
has been using a variety of these for about 50 years.
They are available in extruded aluminum, forged aluminum, and stainless,
fully rollerized, or bushed and roller tipped, and in any ratio desired.
(After correcting the ratio on a number of aircraft rockers, it is
obvious that
the factory does not pay close attention to this)
As far as strength, no contest here: Where an aircraft may have open
pressure
of approx. 300lbs, we run open pressures of around 1000 lbs.
Another significant advantage to the roller rockers is reduced valve
guide wear.
Not sure of HP gains on a slow turning ac engine, but might be
interesting to dyno each.
Archie
----- Original Message -----
From: n801bh@netzero.com
To: engines-list@matronics.com
Sent: Saturday, June 24, 2006 2:12 AM
Subject: Re: Engines-List: Lycoming Thunderbolt Engines
Geez,,, Roller rockers are pretty easy to fabricate, test and
furnish.. Cheap HP gains from them too.. You would figure a company like
Lycoming, with 60+ years of supposable R&D would have addressed that
simple thing years ago. Now,,, if they can get their crankshafts from
breaking they might go somewhere. You can bet if one does break on this
new line of experimental engines the their response will be "_uckoff"
,,,,Their is something wrong with in installation.. They will not stand
behind their certified engines.!!!!!!!!!!!!!!!!
Message 2
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| Subject: | Re: Lycoming Thunderbolt Engines |
Friction is Friction...... but you already knew that Archie... Less fric
tion= more power. I have been into more "certified aircraft" then I ca
re to admit. In every instance I shake my head in amazement at how they
get away with such crude technology and machining tolerances. You can be
t most of the valve guide failures and premature wear are because of POO
R quality control during the machining process. That is exactly why I pr
oduce an auto engine conversion for experimental planes using the latest
and best parts available. I kinda chuckle at the ad where Thielert anno
unces the "new" technology of roller lifters. Gm's 53 and 71 series Detr
iot Diesels have had that stuff since the late 1940's. There is a fool b
orn every minute and most will end up buying a Lycoming or Cont thinking
it they are on the cutting edge of technology. Thank god for the experi
mental movement !!!!!!!!!!!!!!!!!!!!!!!
do not achive
Ben Haas
N801BH
www.haaspowerair.com
-- "Archie" <archie97@earthlink.net> wrote:
Two companies tried that in aviation, and failed.There are a series of p
arameters that do not directly apply to aircraft use,but for the most pa
rt, why re invent the wheel, when the racing industry has been using a v
ariety of these for about 50 years.They are available in extruded alumin
um, forged aluminum, and stainless,fully rollerized, or bushed and rolle
r tipped, and in any ratio desired.(After correcting the ratio on a numb
er of aircraft rockers, it is obvious thatthe factory does not pay close
attention to this) As far as strength, no contest here: Where an aircra
ft may have open pressureof approx. 300lbs, we run open pressures of aro
und 1000 lbs.Another significant advantage to the roller rockers is redu
ced valve guide wear.Not sure of HP gains on a slow turning ac engine, b
ut might be interesting to dyno each.Archie----- Original Message -----
June 24, 2006 2:12 AMSubject: Re: Engines-List: Lycoming Thunderbolt Eng
ines
Geez,,, Roller rockers are pretty easy to fabricate, test and furnish..
Cheap HP gains from them too.. You would figure a company like Lycoming,
with 60+ years of supposable R&D would have addressed that simple thing
years ago. Now,,, if they can get their crankshafts from breaking they
might go somewhere. You can bet if one does break on this new line of ex
perimental engines the their response will be "_uckoff" ,,,,Their is som
ething wrong with in installation.. They will not stand behind their cer
tified engines.!!!!!!!!!!!!!!!!
<html><P>Friction is Friction...... but you already knew that Archie...
Less friction= more power. I have been into more "certified aircraft"
then I care to admit. In every instance I shake my head in amazement at
how they get away with such crude technology and machining tolerances. Y
ou can bet most of the valve guide failures and premature wear are becau
se of POOR quality control during the machining process. That is exactly
why I produce an auto engine conversion for experimental planes us
ing the latest and best parts available. I kinda chuckle at the ad where
Thielert announces the "new" technology of roller lifters. Gm's 53
and 71 series Detriot Diesels have had that stuff since the late 1
940's. There is a fool born every minute and most will end up buying a L
ycoming or Cont thinking it they are on the cutting edge of technol
ogy. Thank god for the experimental movement !!!!!!!!!!!!!!!!!!!!!!!</P>
<P>do not achive <BR><BR><BR>Ben Haas<BR>N801BH<BR>www.haaspow
erair.com<BR><BR>-- "Archie" <archie97@earthlink.net>&nb
sp;wrote:<BR></P>
<META content="MSHTML 6.00.2900.2912" name=GENERATOR>
<DIV><FONT face=Arial size=2><STRONG>Two companies tried that in avi
ation, and failed.</STRONG></FONT></DIV>
<DIV><STRONG><FONT face=Arial size=2>There are a series of parameter
s that do not directly apply to aircraft use,</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>but for the most part, why re i
nvent the wheel, when the racing industry </FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>has been using a variety of the
se for about 50 years.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>They are available in extruded
aluminum, forged aluminum, and stainless,</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>fully rollerized, or bushed and
roller tipped, and in any ratio desired.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>(After correcting the ratio on
a number of aircraft rockers, it is obvious that</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>the factory does not pay close
attention to this)</FONT></STRONG> </DIV>
<DIV><STRONG><FONT face=Arial size=2>As far as strength, no contest
here: Where an aircraft may have open pressure</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>of approx. 300lbs, we run open
pressures of around 1000 lbs.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>Another significant advantage t
o the roller rockers is reduced valve guide wear.</FONT></STRONG></DIV>
<DIV><STRONG><FONT face=Arial size=2>Not sure of HP gains on a slow
turning ac engine, but might be interesting to dyno each.</FONT></STRONG
></DIV>
<DIV><STRONG><FONT face=Arial size=2>Archie</FONT></STRONG></DIV>
<BLOCKQUOTE style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT:
5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black">
<B>From:</B> <A title=n801bh@netzero.com href="mailto:n801bh@netzero
.com">n801bh@netzero.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=engines-list@matro
nics.com href="mailto:engines-list@matronics.com">engines-list@matroni
cs.com</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, June 24, 2006 2:1
2 AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Engines-List: Lycomi
ng Thunderbolt Engines</DIV>
<DIV><BR></DIV>Geez,,, Roller rockers are pretty easy to fabricate, test
and furnish.. Cheap HP gains from them too.. You would figure a company
like Lycoming, with 60+ years of supposable R&D would have addresse
d that simple thing years ago. Now,,, if they can get their crankshafts
from breaking they might go somewhere. You can bet if one does break on
this new line of experimental engines the their response will be "_uckof
f" ,,,,Their is something wrong with in installation.. They will not sta
nd behind their certified engines.!!!!!!!!!!!!!!!!<BR><BR><BR><BR><BR>&n
bsp;<BR> <BR> <BR><BR><BR><BR></BLOCKQUOTE></html>
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