Today's Message Index:
----------------------
1. 05:10 AM - Re: Kit Fox N554KF has been sold (Catz631@aol.com)
2. 07:09 AM - Re: Airspeed indicator fail (again) (mikeperkins)
3. 07:54 AM - Re: Re: Airspeed indicator fail (again) (paul wilson)
4. 10:34 AM - Re: Airspeed indicator fail (again) (mikeperkins)
5. 03:44 PM - Fuel Pump IV-1200 w/ 582 (rawheels)
6. 04:24 PM - Re: Fuel Pump IV-1200 w/ 582 (Dave Fisher)
7. 05:34 PM - Re: Fuel Pump IV-1200 w/ 582 (fox5flyer)
8. 05:35 PM - heat shield (CLEMWEHNER)
9. 06:18 PM - Re: heat shield (vetdrem)
Message 1
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| Subject: | Re: Kit Fox N554KF has been sold |
Steve,
I am sorry to see you go but I surely understand. This economy has been a
bitch to a lot of people!
I wish you had been in this area (NW Florida) The economy is no better but
you wouldn't of had a problem with condition inspections,tailwheel
instruction,etc. This area is very friendly when it comes to experimentals/LSA
airplanes. Out of 14 residents on our airpark 4 are AI's,3 A&P's and 3 CFI's
(including me) And we have a grass strip. You would fit right in.
Tell the purchaser of your aircraft to hop right into this forum. There is
a wealth of good information. I know I look forward to my morning coffee
and the Kitfox/Rotax list (once in a while I will venture into the
Aeroelectric list but it's mostly too hairy for me....God lives in the electrical
system !)
Best of luck to you Steve and stay flying!
Dick Maddux
Fox 4
Milton,Fl
Message 2
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| Subject: | Re: Airspeed indicator fail (again) |
Pat,
I've torn my house apart looking for a page from an ancient Kitplanes magazine
that I used to make my manometer. I think Kitplanes allows archival searches,
and I'll go look there in the next couple of days.
It's just two water columns in U-shaped tubing that measures pressure that you
add by rolling up some surgical hose connected to one of the two columns. Tinting
the water with a little dye helps a lot. I chose to take the ASI out of the
airplane because I wanted to compare two ASIs at the same time. But a perfectly-sealed
pitot system won't leakdown, so it should be possible to test it on
the airplane, too.
When I find it, I'll attach a copy of the Kitplanes article in a posting. In the mean time, you can review Jim Weir's article on the same topic, but his article is not as easy to follow: http://www.rstengineering.com/rst/articles/KP89JUL.pdf
Neither of the articles express the following point very well: the given water
displacement is the DIFFERENCE between the two columns of water, not the distance
above where the column was when it was at rest. In other words, when you mark
the manometer from a fixed 0 point, you have to divide the given displacement
numbers by two (because the water goes up in one column and equally down in
the other column).
Mike
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=293834#293834
Message 3
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| Subject: | Re: Airspeed indicator fail (again) |
The water manometer method has been debunked over and over. It will
not yield accurate result unless you are a sea level on a standard
atmospheric day. Last time I challenged the EAA article . The EAA
tech person agreed . A waste of time to build a manometer. They even
sent me a link that proved what I thought was always the case. Keep
searching on Google and you will find the link. Just send your meter
to a meter company and get it calibrated. Any thermodynamics
engineering grad should be able to generate the formulas.
Paul
=======================
At 08:09 AM 4/11/2010, you wrote:
>
>Pat,
>
>I've torn my house apart looking for a page from an ancient
>Kitplanes magazine that I used to make my manometer. I think
>Kitplanes allows archival searches, and I'll go look there in the
>next couple of days.
>
>It's just two water columns in U-shaped tubing that measures
>pressure that you add by rolling up some surgical hose connected to
>one of the two columns. Tinting the water with a little dye helps a
>lot. I chose to take the ASI out of the airplane because I wanted to
>compare two ASIs at the same time. But a perfectly-sealed pitot
>system won't leakdown, so it should be possible to test it on the
>airplane, too.
>
>When I find it, I'll attach a copy of the Kitplanes article in a
>posting. In the mean time, you can review Jim Weir's article on the
>same topic, but his article is not as easy to follow:
>http://www.rstengineering.com/rst/articles/KP89JUL.pdf
>
>Neither of the articles express the following point very well: the
>given water displacement is the DIFFERENCE between the two columns
>of water, not the distance above where the column was when it was at
>rest. In other words, when you mark the manometer from a fixed 0
>point, you have to divide the given displacement numbers by two
>(because the water goes up in one column and equally down in the
>other column).
>
>Mike
Message 4
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| Subject: | Re: Airspeed indicator fail (again) |
Thanks for bringing that up, Paul. As a TC, I enjoy refining what I know and spreading
correct information.
You're quite correct about not being able to use a fixed scale on a water manometer.
But a water manometer can indeed yield accurate results if density altitude
equations are applied. The equations are the same ones used to find TAS.
Here's a website that will do all the math for you. Just enter the manometer reading (in inches) plus the existing conditions (temp, baro, altitude, dew pt); it instantly gives you the true airspeed. http://chrusion.com/BJ7/ASICalc.html
Or you can premark the manometer scale. Just enter the airspeeds you want to measure;
it gives you the manometer markings in inches. . . . . And if you scroll
down from the calculation section, there are some simplified plans.
I wouldn't want to mess with an ASI in an attempt to calibrate it. But I also think
that checking an ASI for accuracy can be a part of being "Experimental."
Thanks again, Paul.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=293861#293861
Message 5
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| Subject: | Fuel Pump IV-1200 w/ 582 |
How many people have had issues with the mikuni pulse/vacuum fuel pumps not having
enough power to pull fuel from the header tank at full RPM? And, do a lot
of people have an electric pump for take-off/back-up purposes?
I've been trying to diagnose a fuel flow problem; My engine would stumble after
a few moments when at full RPM, but seemed fine at other settings. I have found
out that the fuel pump will work fine if you have a gas can plugged in close
to the engine, but it just doesn't have quite enough power to pull fuel all
the way from the header tank @ above 6000 RPM. I tried temporarily installing
an electric fuel pump, and the engine worked great. The mikuni pump is fairly
new, but I understand it could be the culprit. However, it is a good distance
to the header tank, so other than the extra safety, it seems like an electric
pump may be warranted to help the vacuum style.
--------
Ryan Wheeler
Kitfox IV-1200
Indianapolis, IN
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=293884#293884
Message 6
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| Subject: | Re: Fuel Pump IV-1200 w/ 582 |
Should be not an issue.
make sure you got the correct impulse line for fuel pump and it secured
tightly and WITHOUT gear clamps.
Tie down run wide open for 3 mins after doing and fuel system testing.
----- Original Message -----
From: "rawheels" <rawheels@yahoo.com>
Sent: Sunday, April 11, 2010 6:43 PM
Subject: Kitfox-List: Fuel Pump IV-1200 w/ 582
>
> How many people have had issues with the mikuni pulse/vacuum fuel pumps
> not having enough power to pull fuel from the header tank at full RPM?
> And, do a lot of people have an electric pump for take-off/back-up
> purposes?
>
> I've been trying to diagnose a fuel flow problem; My engine would stumble
> after a few moments when at full RPM, but seemed fine at other settings.
> I have found out that the fuel pump will work fine if you have a gas can
> plugged in close to the engine, but it just doesn't have quite enough
> power to pull fuel all the way from the header tank @ above 6000 RPM. I
> tried temporarily installing an electric fuel pump, and the engine worked
> great. The mikuni pump is fairly new, but I understand it could be the
> culprit. However, it is a good distance to the header tank, so other than
> the extra safety, it seems like an electric pump may be warranted to help
> the vacuum style.
>
> --------
> Ryan Wheeler
> Kitfox IV-1200
> Indianapolis, IN
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=293884#293884
>
>
>
Message 7
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| Subject: | Re: Fuel Pump IV-1200 w/ 582 |
Mike, it sounds like you have a "too soft" pulse line, too long, or maybe a
little of both. I believe that it should be no longer than 12" and be made
of a material that won't expand and absorb the pulses. Rubber fuel
injection hose works pretty well. Are you running a 582? If so, the Mikuni
should pump adequately if the pulses are getting to the pump.
Deke
>
> How many people have had issues with the mikuni pulse/vacuum fuel pumps
> not having enough power to pull fuel from the header tank at full RPM?
> And, do a lot of people have an electric pump for take-off/back-up
> purposes?
>
> I've been trying to diagnose a fuel flow problem; My engine would stumble
> after a few moments when at full RPM, but seemed fine at other settings.
> I have found out that the fuel pump will work fine if you have a gas can
> plugged in close to the engine, but it just doesn't have quite enough
> power to pull fuel all the way from the header tank @ above 6000 RPM. I
> tried temporarily installing an electric fuel pump, and the engine worked
> great. The mikuni pump is fairly new, but I understand it could be the
> culprit. However, it is a good distance to the header tank, so other than
> the extra safety, it seems like an electric pump may be warranted to help
> the vacuum style.
>
> --------
> Ryan Wheeler
> Kitfox IV-1200
> Indianapolis, IN
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=293884#293884
>
>
>
Message 8
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Do we need to make a thin aluminum heat shield to protect the firewall
blanket from the muffler heat on a 912 installation in a model IV?
If so, how much of the lower firewall does it need to cover?
thanks for the help,
Clem
Oklahoma KFIV, 912
Message 9
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I have a model III with a 912, and have about 200 hours on it. I noticed that
the blanket was getting a little discolored behind the exhaust, and it started
getting brittle.
I decided to do exactly what you asked about. I cut and shaped some aluminum to
cover the blanket right behind the exhaust. The only places that needed it
on my installation was for the exhaust lines from the back cylinders to the muffler.
I don't know if it is really needed or not, but I don't get as many questions
from friends looking things over, and besides, it makes me feel better.
Louie
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=293898#293898
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