REFLECTOR:V8 Vacuum system

KeithHallsten reflector@tvbf.org
Mon, 20 Oct 2003 19:49:54 -0700


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I'm going all-electric with my XL.  I'm just starting the engine =
installation phase of my project, using a mock-up of an IO-540D.  =
Redundancy is so cheap and easy to do with electrical, I wouldn't bother =
dealing with the hassle of installing and maintaining a vacuum system. =20

If you go all-electric, it's vital to include a system providing active =
notification of low voltage, so you have the capacity of your =
battery(ies) to keep the important electrical stuff going while you =
decide where to land if your (main) alternator should pack it in.  With =
modern sealed lead-acid batteries, this could well be as long as your =
total fuel endurance!  As other have already noted, you will find the =
information you need in the AeroElectric Connection, available from =
http://www.aeroelectric.com/ .

I'm planning a dual-bus, dual battery ("small" SLA batteries), dual =
alternator (60 amp belt-driven main, 8 amp backup on the vacuum pump =
pad) electrical system.  The goal of having electrical system =
reliability better than the reliability of just about any other system =
in the plane is easily within reach, at no great cost.=20

I probably won't use spinning-mass gyros.  There are many options now =
available for solid state attitude and heading at about the same cost as =
conventional gyros, but with far less potential for reliability =
problems.  I doubt that the manufacture of spinning mass gyros will =
persist for more than a few more years.

Keith Hallsten
=20
  ----- Original Message -----=20
  From: velocityxlfg=20
  To: reflector@tvbf.org=20
  Sent: Monday, October 20, 2003 6:47 AM
  Subject: REFLECTOR:V8 Vacuum system


  Is there any one out there who put a vacuum system
  on an auto conversion? I have a Chevy V8=20
  installed and would like some ideas on how other people
  attacked the Vacuum system. I thought of a electrical=20
  driven vacuum pump but do not know how much=20
  vacuum I need to pull. I bought a engine driven aircraft pump. But =
with it I need to find out what Rpm  it needs to be run at? Where it =
mount it ?And how I might install it.
  Or should I just give up on the vacuum system all to gerther
  and go all electrical.

  Thank you Wise ones
  Ron
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>I'm going all-electric with my =
XL.&nbsp; I'm just=20
starting the engine installation phase of my project, using a mock-up of =
an=20
IO-540D.&nbsp; Redundancy is so cheap and easy to do with =
electrical,&nbsp;I=20
wouldn't bother dealing with the hassle of installing and maintaining a =
vacuum=20
system.&nbsp; </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>If you go all-electric, it's vital to =
include a=20
system providing active notification of low voltage, so you have the =
capacity of=20
your battery(ies) to keep the important electrical stuff going while you =
decide=20
where to land if your (main) alternator should pack it in.&nbsp; With =
modern=20
sealed lead-acid batteries, this could well be as long as your total =
fuel=20
endurance!&nbsp; As other have already noted, you will find the =
information you=20
need in the AeroElectric Connection, available from <A=20
href=3D"http://www.aeroelectric.com/">http://www.aeroelectric.com/</A>&nb=
sp;.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I'm planning a dual-bus, dual battery =
("small" SLA=20
batteries), dual alternator (60 amp belt-driven main, 8 amp backup on =
the vacuum=20
pump pad)&nbsp;electrical system.&nbsp; The goal of having electrical =
system=20
reliability better than the reliability of just about any other system =
in the=20
plane is easily within reach, at no great cost.&nbsp;</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>I probably won't use spinning-mass =
gyros.&nbsp;=20
There are many options now available for solid state attitude and =
heading at=20
about the same cost as conventional gyros, but with far less potential =
for=20
reliability problems.&nbsp; I doubt that the manufacture of spinning =
mass gyros=20
will persist for more than a few more years.</FONT></DIV>
<DIV>&nbsp;</DIV>
<DIV><FONT face=3DArial size=3D2>Keith Hallsten</FONT></DIV>
<DIV>&nbsp;</DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title=3Dvelocityxl@fastmail.fm=20
  href=3D"mailto:velocityxl@fastmail.fm">velocityxlfg</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
  href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Monday, October 20, 2003 =
6:47=20
  AM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> REFLECTOR:V8 Vacuum =
system</DIV>
  <DIV><BR></DIV>
  <DIV><FONT face=3DArial size=3D2>Is there any one out there who put a =
vacuum=20
  system</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2>on an auto conversion? I have a Chevy =
V8=20
  </FONT></DIV>
  <DIV><FONT face=3DArial size=3D2>installed and would like some ideas =
on how other=20
  people</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2>attacked the Vacuum system. I thought =
of a=20
  electrical </FONT></DIV>
  <DIV><FONT face=3DArial size=3D2>driven vacuum pump but do not know =
how much=20
  </FONT></DIV>
  <DIV><FONT face=3DArial size=3D2>vacuum I need to pull. I bought a =
engine driven=20
  aircraft pump. But with it I need to find out&nbsp;what Rpm&nbsp; it =
needs to=20
  be run at? Where it mount it ?And how I might install it.</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2>Or should I just give up on the =
vacuum system all=20
  to gerther</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2>and go all electrical.</FONT></DIV>
  <DIV><FONT face=3DArial size=3D2></FONT>&nbsp;</DIV>
  <DIV><FONT face=3DArial size=3D2>Thank you Wise ones</FONT></DIV>
  <DIV><FONT face=3DArial =
size=3D2>Ron</FONT></DIV></BLOCKQUOTE></BODY></HTML>

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