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phactor9
Joined: 16 Jun 2011
Posts: 78
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 Posted: Sun Dec 11, 2011 8:38 am Post subject: Inflight fuel mixture |
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Hi Jack: (Jack Hart)
I've been looking with great interest at your in-flight mixture control apparatus for many months now. I finally have my Tillotson in-hand and have it apart studying it alongside the manual and your pages. My Tillotson, of course, goes to my CRE mz201, which I hope to fly this Spring in my new Firefly (building over the winter months).
I'm sure I'll fly for quite some time and monitor the plugs before I attempt any work on the carb, but it's fascinating to do the study now.
1. Your new vent connection opens to the chamber as indicated by the blue arrows in these photos?
Yours:
http://phactor.com/Hart/fly153bbBlueArrow.jpg
Mine:
http://phactor.com/Hart/flow.jpg
2. Were your Dynamic Pressure Probes meant only for monitoring, or did you continue work that made them actively participate in your carb's fuel mixture?
Regards!
Phil H.
[quote][b]
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jbhart(at)onlyinternet.ne
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| Posted: Sun Dec 11, 2011 9:51 am Post subject: Inflight fuel mixture |
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X-Mailer: YahooMailClassic/15.0.4 YahooMailWebService/0.8.115.331698
Date: Sun, 11 Dec 2011 08:36:15 -0800 (PST)
From: Phil <phactor9(at)yahoo.com>
| Quote: | ..................................
I've been looking with great interest at your in-flight mixture control
|
apparatus for many months now. I finally have my Tillotson in-hand and have
it apart studying it alongside the manual and your pages. My Tillotson, of
course, goes to my CRE mz201, which I hope to fly this Spring in my new
Firefly (building over the winter months).
I'm sure I'll fly for quite some time and monitor the plugs before I attempt
any work on the carb, but it's fascinating to do the study now.
1. Your new vent connection opens to the chamber as indicated by the blue
arrows in these photos?
Yours: http://phactor.com/Hart/fly153bbBlueArrow.jpg
Mine: http://phactor.com/Hart/flow.jpg
2. Were your Dynamic Pressure Probes meant only for monitoring, or did you
continue work that made them actively participate in your carb's fuel
mixture?
Phil,
#1. -> We agree on the vent location.
#2. -> The current set up is to use the +/- dynamic pressure probes to
establish a controlled pressure below the carburetor control diaphragm.
Currently this is the way the MZ 34 is set up. It is ready for tie-down
testing to see if it will work properly. When they get the control for
my hangar door mounted out of the way and a warm day comes along, I will
be testing it, and I can give you a better idea of how it works.
I am excited about your choice of the MZ 201 for a FireFly. I am a great
believer in reed valve engines with ceramic coated aluminum cylinders. They
will take much more abuse than the steel liners with aluminum pistons.
| Quote: | From past experience with a Rotax 447, I encourage you to run and monitor
dual EGT and CHT's. In my case the cylinder that gave the trouble was not
|
the one monitored.
Jack B. Hart FF004
Winchester, IN
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phactor9
Joined: 16 Jun 2011
Posts: 78
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| Posted: Sun Dec 11, 2011 11:51 am Post subject: Inflight fuel mixture |
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#1 - yay!
#2 - Looking forward to your test reports.
Over the past year, I've been looking at many engines by Simonini, Hirth, Rotax and CRE. For me the mz201 wins hands-down on paper: 4,700 max RPM enabling me to order a 60x24 wooden TN prop (talk to Steve at 931.455-4516!) with a 1.77:1 belt reduc, close to 75-77 lb fly-weight (I'll have final figures soon), dual CDI ignition, supposedly higher TBO, and a nice hefty 45HP; I should rarely need 45HP, but it will hopefully translate to favorable gas consumption.
I bought dual Falcon CHT (CR-002) and EGT (ER-002) gauges from Aircraft Spruce, also a Hobbs meter and TinyTach. I plan to use my Garmin eTrex for airspeed and altitude. I might get a Halls windmeter if I can figure out where to mount it on a Firefly.
Phil H - FF???
Hixson, TN
--- On Sun, 12/11/11, Jack B. Hart <jbhart(at)onlyinternet.net> wrote:
| Quote: |
From: Jack B. Hart <jbhart(at)onlyinternet.net>
Subject: Re: Inflight fuel mixture
To: kolb-list(at)matronics.com
Date: Sunday, December 11, 2011, 12:52 PM
--> Kolb-List message posted by: "Jack B. Hart" <jbhart(at)onlyinternet.net (jbhart(at)onlyinternet.net)>
X-Mailer: YahooMailClassic/15.0.4 YahooMailWebService/0.8.115.331698
Date: Sun, 11 Dec 2011 08:36:15 -0800 (PST)
From: Phil <phactor9(at)yahoo.com (phactor9(at)yahoo.com)>
| Quote: | ..................................
I've been looking with great interest at your in-flight mixture control
|
apparatus for many months now. I finally have my Tillotson in-hand and have
it apart studying it alongside the manual and your pages. My Tillotson, of
course, goes to my CRE mz201, which I hope to fly this Spring in my new
Firefly (building over the winter months).
I'm sure I'll fly for quite some time and monitor the plugs before I attempt
any work on the carb, but it's fascinating to do the study now.
1. Your new vent connection opens to the chamber as indicated by the blue
arrows in these photos?
Yours: http://phactor.com/Hart/fly153bbBlueArrow.jpg
Mine: http://phactor.com/Hart/flow.jpg
2. Were your Dynamic Pressure Probes meant only for monitoring, or did you
continue work that made them actively participate in your carb's fuel
mixture?
Phil,
#1. -> We agree on the vent location.
#2. -> The current set up is to use the +/- dynamic pressure probes to
establish a controlled pressure below the carburetor control diaphragm.
Currently this is the way the MZ 34 is set up. It is ready for tie-down
testing to see if it will work properly. When they get the control for
my hangar door mounted out of the way and a warm day comes along, I will
be testing it, and I can give you a better idea of how it works.
I am excited about your choice of the MZ 201 for a FireFly. I am a great
believer in reed valve engines with ceramic coated aluminum cylinders. They
will take much more abuse than the steel liners with aluminum pistons.
| Quote: | From past experience with a Rotax 447, I encourage you to run and monitor
dual EGT and CHT's. In my case the cylinder that gave the trouble was not
|
th-= November is the Annual List m/contribution" target=_blank>http://www.matronics.com/contributionhttp://forums.sp; - List Contribution Web Snbsp; -Matt Dralle, List Admin.
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[quote][b]
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Sun Dec 11, 2011 12:37 pm Post subject: Inflight fuel mixture |
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I plan to use my Garmin eTrex for airspeed and altitude. I might get a
Halls windmeter if I can figure out where to mount it on a Firefly.
Phil H - FF???
Phil H/Kolbers:
Garmin Etrex GPS is great for a pickup truck to determine speed, but it will
not give you airspeed. GPS gives you ground speed which doesn't take wind
into consideration.
Recommend flying your Kolb with an airspeed indicator, as a minimum. The
airspeed indicator is the most important of all instruments in an airplane.
Something to give you stall and VNE speeds.
john h
mkIII
Titus, Alabama
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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phactor9
Joined: 16 Jun 2011
Posts: 78
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| Posted: Sun Dec 11, 2011 1:05 pm Post subject: Inflight fuel mixture |
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All true. I will be getting an AIS of some type. If I can't find something under $75 or so, then Halls it is.
--- On Sun, 12/11/11, John Hauck <jhauck(at)elmore.rr.com> wrote:
| Quote: |
From: John Hauck <jhauck(at)elmore.rr.com>
Subject: RE: Inflight fuel mixture
To: kolb-list(at)matronics.com
Date: Sunday, December 11, 2011, 3:34 PM
--> Kolb-List message posted by: "John Hauck" <[url=/mc/compose?to=jhauck(at)elmore.rr.com]jhauck(at)elmore.rr.com[/url]>
I plan to use my Garmin eTrex for airspeed and altitude. I might get a
Halls windmeter if I can figure out where to mount it on a Firefly.
Phil H - FF???
Phil H/Kolbers:
Garmin Etrex GPS is great for a pickup truck to determine speed, but it will
not give you airspeed. GPS gives you ground speed which doesn't take wind
into consideration.
Recommend flying your Kolb with an airspeed indicator, as a minimum. The
airspeed indicator is the most important of all instruments in an airplane.
Something to give you stall and VNE speeds.
john h
mkIII
Titus, Ala -- Please Support Your Lists This Month --http://forums.matronics.com[/url]http://www.matronics.com/contribution============
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[quote][b]
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Richard Pike
Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee
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| Posted: Sun Dec 11, 2011 7:50 pm Post subject: Re: Inflight fuel mixture |
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| phactor9 wrote: | All true. I will be getting an AIS of some type. If I can't find something under $75 or so, then Halls it is.
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Back in the Old Days, I had an 80 mph Hall meter on my Hummer, and I had it mounted in the panel. Wish I had some pictures, but I don't so I'll try and describe it.
My Hummer had a sort of Firefly-ish nose cone fairing on it, and I took a length of 1" OD PVC pipe and heated it and s-curved it so that it poked out the front of the fairing. At the cockpit end, it came just barely through the panel and I shaped the panel end with a Moto-tool so that it matched the curve of the bottom ram air side of the Hall meter.
Glued/safety wired it to the Hall meter and began to flight test it against another Hall meter mounted out in clear our alongside the fuselage. Adjusted the cockpit one by over sleeving the front intake end of the pvc pipe until it got the right amount of ram air to make it accurate.
Theoretically the Hall needs air flowing across the top to suck the disc up as the ram air blows in the bottom, but if you make the ram air tube the right size, it doesn't need it.
Looked like I had a 20MM cannon coming out the front of the nose cone, but it worked quite well, and I didn't have much money in it.
Oh yeah - as part of the pre flight, make sure the teensy-weensy spider hasn't built a web inside the Hall around the float disc, because if she has, it won't work. Guess how I know this?
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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_________________
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
Forgiving is tough, being forgiven is wonderful, and God's grace really is amazing. |
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captainron1(at)cox.net
Guest
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| Posted: Mon Dec 12, 2011 1:00 pm Post subject: Inflight fuel mixture |
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Hall is good, was accurate and easy to mount I have a new one if you want to buy it not sure where it is but will look for it if you want it.
I ended up with two after ordering one which must have been shipped on a mule, so out of urgency I ordered another one, ergo two. Of course they were both delivered on the same day by UPS, one after two weeks on the road and the next one after three days on the road.
go figure!
Ron (at) KFHU
==================================================
---- Phil <phactor9(at)yahoo.com> wrote:
=============
All true. I will be getting an AIS of some type. If I can't find something under $75 or so, then Halls it is.
--- On Sun, 12/11/11, John Hauck <jhauck(at)elmore.rr.com> wrote:
From: John Hauck <jhauck(at)elmore.rr.com>
Subject: RE: Inflight fuel mixture
To: kolb-list(at)matronics.com
Date: Sunday, December 11, 2011, 3:34 PM
I plan to use my Garmin eTrex for airspeed and altitude. I might get a
Halls windmeter if I can figure out where to mount it on a Firefly.
Phil H - FF???
Phil H/Kolbers:
Garmin Etrex GPS is great for a pickup truck to determine speed, but it will
not give you airspeed. GPS gives you ground speed which doesn't take wind
into consideration.
Recommend flying your Kolb with an airspeed indicator, as a minimum. The
airspeed indicator is the most important of all instruments in an airplane.
Something to give you stall and VNE speeds.
john h
mkIII
Titus, Alabama
le, List Admin.
le, List Admin.
--
kugelair.com
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