 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
esteuber(at)rochester.rr.
Guest
|
 Posted: Tue Jun 27, 2006 3:11 am Post subject: Dirt in the exhaust |
 |
|
I was finally able to get the rest of the dope on the Ultrastar and test-run the overhauled engine. A slight problem arose....Apparently when the engine was detached from the airframe in the cornfield some dirt made its way into the exhaust. Before installing the exhaust after the overhaul I blew compressed air into both openings and did not notice any thing unusual...no rattling noises ...But upon starting after 5 or 6 pulls on the rope, a bunch of small pieces of dirt and corn stalk blew out....My question is this...when you pull a 2 stroke through with the rope and it does not fire, what are the chances of the dirt back sucking into the cylinders. I know soon as is starts the flow ejects anything in the exhaust but is there a chance it may have got into the cylinders....2 strokes are funny ducks !
Waddling around Ed in Western NY ........... had to drop the "Know it All title"
| | - 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:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
| Back to top |
|
 |
John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
|
| Posted: Tue Jun 27, 2006 5:14 am Post subject: Dirt in the exhaust |
|
|
what are the chances of the dirt back sucking into the cylinders. I
know soon as is starts the flow ejects anything in the exhaust but is
there a chance it may have got into the cylinders....2 strokes are
funny ducks !
Waddling around
Ed in Western NY ........... had to drop the "Know it All
title"
Funny Duck:
Can't say for "certain" whether it will suck dirt out of the exhaust
or not, but there is a darn good chance it will.
Some years ago, 1989, on a return flight from River Ranch, FL, 447
powered Firestar, wrist pin needle bearing came apart in one cylinder.
When I pulled the cylinders off, there were needles stuck in the top
of both pistons, although the 447 has two seperate crankcases.
Undoubtedly, the needles from one cylinder were blown out the bad
cylinder and into the good cylinder.
NOTE: This engine started coming apart while at the flyin, yet made
it all the way from Central Florida back to Titus, Alabama. Very
fortunate, i.e., lucky as Hell.
john h (chicken hawk)
mkIII
PS: Did someone come up with SN: M3-001, the first customer built
MKIII? I think it was Rudy Doctor. I remember seeing his kit, ready
for shipment, when I arrived at the Kolb Company 1 Feb 1991.
| | - 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:
http://www.matronics.com/Navigator?Kolb-List |
|
_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
|
| Back to top |
|
|
herbgh
Joined: 10 Jan 2006
Posts: 145
|
|
| Back to top |
|
|
Kirk Smith
Joined: 10 Jan 2006
Posts: 78
Location: SE Michigan
|
| Posted: Tue Jun 27, 2006 7:47 am Post subject: Dirt in the exhaust |
|
|
<....My question is this...when you pull a 2 stroke through with the rope and it does not fire, what are the chances of the dirt back sucking into the cylinders. >
Don't know where the suction/back pressure at the exhaust port would come from during cranking. The tuned exhaust isn't even working at that point. I would suspect the dirt got sucked in the intake and was in the crankcase or transfer port channels from the crash.
| | - 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:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
| Back to top |
|
|
jbhart(at)onlyinternet.ne
Guest
|
| Posted: Tue Jun 27, 2006 9:04 am Post subject: Dirt in the exhaust |
|
|
At 09:38 AM 6/27/06 -0500, you wrote:
| Quote: |
All
Some years ago I suggested a bit of water injection in to the exhaust
port.. Maybe a one way nipple just beyond the Y.. I have always thought
it would keep the piston clean --not sure about its effect on the rings..
Perhaps an anti freeze solution?
Sounds like an experiment for Jack?? 
Herb
do not archive
|
Herb,
I have tried water injection to see if I could smooth out a Rotax 447.
The study indicated that water injection did influence fuel flow and
help the engine to run more efficiently. How it was done and the results
can be seen at:
http://www.thirdshift.com/jack/firefly/firefly58c.html
I did not fly with this system, and I have not tried it on the Victor 1+.
The jump to Factory Direct no longer works, but the same info can be seen at:
http://www.msdpowersports.com/
Look in their catalog and look at page 19. In their case they are
automatically changing water flow rate to meet changing engine rpm. This is
not necessary for flying because most of the time the engine is at a
constant throttle position, so it is possible to manually control the water
flow rate to match the engine rpm. This makes for a much simpler system, made
up of a water storage vessel, a pressure source and the calibrated needle valve
to control the water flow.
Jack B. Hart FF004
Winchester, IN
| | - 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:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
| Back to top |
|
|
herbgh
Joined: 10 Jan 2006
Posts: 145
|
| Posted: Tue Jun 27, 2006 11:36 am Post subject: Dirt in the exhaust |
|
|
Jack
I was thinking about injection strictly for maintainence .Decarb and
possibly a method to prevent ring sticking? Anything that might help to
flush carbon.. Never thought about it otherwise. I will check out
your links.. Herb
do not archive
On Tue, 27 Jun 2006 13:10:43 -0500 "Jack B. Hart"
<jbhart(at)onlyinternet.net> writes:
| Quote: |
<jbhart(at)onlyinternet.net>
>
Herb,
I have tried water injection to see if I could smooth out a Rotax
447.
The study indicated that water injection did influence fuel flow and
help the engine to run more efficiently. How it was done and the
results
can be seen at:
http://www.thirdshift.com/jack/firefly/firefly58c.html
I did not fly with this system, and I have not tried it on the
Victor 1+.
The jump to Factory Direct no longer works, but the same info can be
seen at:
http://www.msdpowersports.com/
|
| | - 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:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
| Back to top |
|
|
Jim Baker
Joined: 30 Mar 2006
Posts: 181
Location: Sayre, PA
|
| Posted: Tue Jun 27, 2006 12:51 pm Post subject: Dirt in the exhaust |
|
|
| Quote: | Anything that might help to
flush carbon..
|
Higher oil ratios, less/no carbon. Maintain operations in the 1150
EGT range, no/little carbon (fly an EGT, not an
airspeed....interesting way to look at it). 300+ hrs at 100:1 and
just a light amber glaze on the piston crown.
Jim Baker
580.788.2779
Elmore City, OK
| | - 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:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
| Back to top |
|
|
JetPilot
Joined: 10 Jan 2006
Posts: 1246
|
| Posted: Wed Jun 28, 2006 10:14 am Post subject: Re: Dirt in the exhaust |
|
|
| esteuber(at)rochester.rr. wrote: |
My question is this...when you pull?a 2 stroke?through with the rope and it does not fire, what are the chances of the dirt back sucking into the cylinders. I know soon as is starts the flow ejects anything in the exhaust but is there a chance it may have got into the cylinders....2 strokes are funny ducks !
|
If the dirt and stuff did not come out when you blew air through the exhaust and handled it, pulling on the rope would not have been enough to break the dirt loose and suck it in.
Once the engine starts it is a different story. A two stroke engine has very strong pressure pulses in the exhaust that could very well suck stuff back in when running. There is a good chance stuff got sucked in once the engine was started. I would clean that exhaust out with gasoline or something to dissolve any oil built up, then with soap and high pressure water that would dissolve any last bit of dirt that might be in there.
| | - 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:
http://www.matronics.com/Navigator?Kolb-List |
|
_________________
"NO FEAR" - If you have no fear you did not go as fast as you could have !!!
Kolb MK-III Xtra, 912-S |
|
| Back to top |
|
|
esteuber(at)rochester.rr.
Guest
|
| Posted: Thu Jun 29, 2006 4:02 am Post subject: Dirt in the exhaust |
|
|
Thanks to everyone that replied about the dirt in the exhaust....With all the comments weighed carefully , I am going to pull the exhaust and see what may have happened...I'll let you all know what I find !
Ed in Western NY
| | - 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:
http://www.matronics.com/Navigator?Kolb-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
