Today's Message Index:
----------------------
1. 09:10 AM - Re: Questions for Ed Hullinger (HMS23TURBO@aol.com)
2. 09:16 AM - Re: Questions for Ed Hullinger (LRE2@aol.com)
3. 06:51 PM - Prop Effeciency (LRE2@aol.com)
4. 07:50 PM - [PLEASE READ] Virus Laden Spam Purports To Be From Matronics... (dralle@matronics.com (Matt Dralle))
Message 1
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| Subject: | Re: Questions for Ed Hullinger |
--> FEWMustang-List message posted by: HMS23TURBO@aol.com
Larry,
I mentioned the high volume oil pump when you were considering the single
stage PSRU system. With that type of system, the engines oil is lubricating the
PSRU as well as the engine via it's pump mounted inside the oil pan. In this
case the volume that the standard pump produces is close to the ragged edge of
being enough. With two stage, or stand alone, PSRU oiling system this isn't
necessary, as the PSRU is taking care of its own oiling needs and the engine's
pump is adequate to handle it's normal duty. Having said that, if you have added
extra oiling options to your engine such as piston squirters or additional
valve train lubrication points, then maybe a high volume pump would be
appropriate. If you haven't done any of this additional work you won't need it.
But if
you decide to go this route, this is a very simple swap. The pump is just a
bit taller with wider gears, the shaft is a little heavier and there is a
variety of pickups that can be used. It all bolts in the same location without
any
modifications needed. They are available at most any auto parts supply house
that does any sort of high performance parts sales. A Melling HV55 is the most
common high volume unit out there. Around $50.
The engine driven fuel pump is from Kinsler Fuel Injection. I'll have to get
you the part #. This guy can be either cam driven or belt driven as it wants
to run at about 50% of crank speed. You'll need a pressure regulator and a
3-way valve to complete the package, but it's not a bad way to go. It allows you
to start up on the electric pump and then switch it off after the engine is
running. The 3-way valve will take care of directing the fuel from which ever
pressure source is active. A very simple setup that has been used in racing since
the 60's.
The thermostat a double edged sword or sorts. If it is working properly, the
engine temp is nothing to worry about. Takeoff, close the radiator exit door,
and the water temp will stay at the thermostat setting. But if it fails, and
they do, the temp can get away from you. I would definitely try to leave it out
of the engine but put a restrictor in its place. A flat plate with a 3/4"
hole would be a good place to start. Without restriction, the water moves through
the engine too quickly and never really has a chance to pull the heat off of
the metal. The size of the restrictor may need adjusting depending upon how
well the rest of your system is working. In flight the FEW radiator / scoop /
exit door package has proven to work pretty well. You may find that on very cool
days or at higher altitudes, the engine needs a thermostat to maintain a
reasonable minimum temperature. If this turns out to be the case, rather than
fitting a thermostat another thought would be to decrease the size of the radiator
exit by adding additional material to the door. All of this is a little bit
of trial and error as each of us has different engines, power levels, and
somewhat different plumbing which can make for dramatic differences in how well
the
system cools. I would suggest starting with the standard radiator
configuration with a restrictor in place and go from there.
I would love to hear your thoughts on additional FEW pieces. The pass
throughs are certainly needed and a good idea. I used -16 bulkhead fittings for
the
water lines, but that all gets real expensive by the time you've put a -16 hose
end fitting on each side of that. I would think that about a 3.000" long
machined tube with a flange for attaching it to the firewall would be a better
solution here. Then you could hose clamp a piece of tubing of your choice to
either side. I've got a good idea for the wiring pass throughs, I think!
Ed
Message 2
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| Subject: | Re: Questions for Ed Hullinger |
--> FEWMustang-List message posted by: LRE2@aol.com
Thanks for the thoughts, Ed. I'll show you some sketches when you come up.
LRE
Message 3
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--> FEWMustang-List message posted by: LRE2@aol.com
Jan;
As per our discussion today, I have reviewed the math re: prop
efficiency. Check my figures. Whirl Wind recommends a prop redline of 2400 RPM.
for the 92" four bladed prop.
Most experts claim that a prop reaches maximum efficiency at
0.8-0.85%Mach.above that, efficiency is lost (read speed) and stress increases
exponentially.
For the 92" prop, my calculations are:
2300RPM = 0.83 MACH
2350RPM = 0.90 MACH
2400RPM = 0.92 MACH
Thus, it would seem that RPMs > 2350 would be counter productive,
resulting in less efficiency, decrease in speed, higher fuel consumption and
greater stress on the engine and prop.
I am no expert, but ther you are........LRE
Message 4
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DNA: not not archive
| Subject: | [PLEASE READ] Virus Laden Spam Purports To Be From Matronics... |
--> FEWMustang-List message posted by: dralle@matronics.com (Matt Dralle)
Dear Listers,
First let me say that I normally don't condone the sharing of warnings
about Internet viruses on the Matronics Email Lists. I don't want to
start a storm of discussion regarding computer viruses on the Lists, so
please just note the information below and refrain from commenting to
the List. The circumstances I describe below are disturbing enough
that I felt an explanation is necessary. That being said...
There is a new email-bourne virus running rampant on the Internet that
is cleverly disguising itself as legitimate email warning of such
things as:
"your email account is disabled because of unauthorized access"
"Some of our clients complained about the spam (negative e-mail
content) outgoing from your e-mail account"
"Probably, you have been infected by a proxy-relay trojan server. In
order to keep your computer safe, follow the instructions."
"Our main mailing server will be temporary unavailable for next two
days, to continue receiving mail in these days you have to
configure our free auto-forwarding service."
All of these messages include an attachment that you are instructed to
click upon to "Get more information", "clean the virus from your
system", or "check your system for infections".
These enclosures all contain a virus that will infect your system and
propagate even more copies of the original message.
The disturbing part of these messages is that they appear to be coming
from very legitimate addresses and have very legitimate, convincing
dialog. For example, I have received a number of them today that
appear to be from "support@matronics.com", "management@matronics.com",
"administration@matronics.com", and "staff@matronics.com".
The text of the messages seems believable enough, and given the forged
source address, seem even more legitimate.
Please be assured that no one at Matronics.com will be sending you
these kinds of messages. If you receive one, it is a spam/virus that
has forged headers and was sent to you from someone other than
Matronics. Delete the message and the attachment promptly. Invest in
a copy of Norton Antivirus and keep the definitions up dated on a daily
basis.
Again, I want to stress that I *DO NOT* want a big discussion of
viruses on the Matronics Email Lists. Please do not reply to this
email with any comments. You may write to me directly at
dralle@matronics.com if you wish, but do not include the List.
Since many of these appear to come from matronics.com, I wanted to
assure everyone that Matronics wasn't the real source of these messages.
Let's be careful out there and keep those virus definitions up to date!
Today alone, the Matronics spam filter and virus blocking appliance
has filtered out 11,550 spam messages and 375 viruses! That's just in
an 18 hour period!
Best regards,
Matt Dralle
Matronics Email List Administrator
--
Matt G. Dralle | Matronics | P.O. Box 347 | Livermore | CA | 94551
925-606-1001 Voice | 925-606-6281 FAX | dralle@matronics.com Email
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