Today's Message Index:
----------------------
1. 12:05 PM - Re: Re: Modified long wing tips (Kayberg@aol.com)
2. 05:29 PM - Re: Modified long wing tips (Bill Strahan)
3. 05:54 PM - Uneven EGTs at full throttle (Bill Strahan)
4. 06:16 PM - Re: Uneven EGTs at full throttle (Catalpa Aviation)
5. 07:16 PM - Re: Uneven EGTs at full throttle (JOSEPH MATHIAS LINDA MATHIAS)
6. 08:44 PM - Re: Uneven EGTs at full throttle (Bill Strahan)
7. 10:46 PM - Re: Re: Uneven EGTs at full throttle (Catalpa Aviation)
Message 1
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Subject: | Re: Modified long wing tips |
In a message dated 11/12/2009 12:23:28 AM Eastern Standard Time,
bill@gdsx.com writes:
I sent an email to them, but have not heard back. I can see many ways of
doing it, just would like to see some pictures of the process if possible.
I'm sure Green Landings is proud of their process, but I wouldn't think
this is an element of intellectual property that really would make the
decision on which center you would choose.
When I do it I'll share some pictures. Unless I butcher it. Then I'll
just ask for sympathy. :)
Bill
I talked to Ryan today and he is looking for pictures of how he does the
wingtips. Not sure he has any. If he does he plans to post them.
It is not about intellectual property as much as trying to offer perks to
those who pay for a facility and advice. Build centers need income to stay
in business and many of the techniques come at a price. Someone has to put
in the hours at some expense to perfect the ways to do things. The
folks at Shelbyville profit from selling kits, so it is in their best interest
to make the kits as easy to build as possible. So they spend the money on
developing a manual and their techniques. Green Landings only gets a
slice of their pie when it comes to kit sales and needs to make additional money
somehow.
Individual builders are doing it for fun. Easy for them to share. But
when you feed your kids by selling airplane kits, trying to be the best
build center and offering the best of design improvements; it is a little
tougher to give away your ideas.
Doug
Message 2
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Subject: | Re: Modified long wing tips |
"...a little tougher to give away your ideas."
Doug, sounds like intellectual property to me. :)
I wasn't trying to be negative by characterizing it that way. If someone came
calling asking me how I did specific things in my software business, in particular
things that differentiate us within our industry, I would not be willing
to share that. I would be giving away IP at that point.
I was simply thinking that this particular modification didn't strike me as particularly
valuable across the market of potential builders, and a great deal of
the value is in the work itself, not the knowledge of how to do it.
Perhaps I'm wrong. If so, it won't be a hallmark moment, it's happened before.
It's certainly Ryan's choice as to what he shares.
So, back to the topic at hand. At this point, I'm thinking I'll take the tips
and cut them to the size I want for my plane. Then I'll split them along the
leading edge so they can open up to take up some of the difference between the
smaller airfoil that will exist at the point I cut them compared to end of the
wing.
Then I'll bond a 4 strip thick layer of fiberglass about 2" wide to the inside
of the cut down tip to create the flange that will allow me to attach it to the
end of the wing. I'll attach it in place with screws, and have a big gap in
the front that I will fill with a block of easily sandable foam. I'll wrap the
end of the wing with some old .016 aluminum I have laying around to protect
it, and then sand the leading edge to shape.
Remove all of that from the wing, sand the foam down about a 1/16 and then 3 layers
of glass over that. Sand. Fill. Sand. Fill...etc.
If that description makes sense, any feedback on it?
Bill
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272538#272538
Message 3
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Subject: | Uneven EGTs at full throttle |
Anyone else experiencing very different EGTs at full throttle? I will see one
set of cylinders running 1300-1390 and the other side 980-1050.
2,4,6 are the cold ones. 1,3,5 are the hot ones. As soon as I throttle back,
the EGT drops on the hot side and comes up on the cold side until they're all
within about 30 degrees.
This occurs at all altitudes, and is particularly troublesome because I can't run
full throttle at altitude. At 12,500 the hot side is hot as ever, but the
cold side is all in the 900s and the engine is pretty rough. Worst I've seen
is just over 1400 on #5 while running 950 on #4. In that situation, as soon as
I pulled the throttle back to about 5 gph #5 dropped to 1370 and #4 came up
to 1360!
While it's fun to put along at 4 gph at 12,500 doing close to 140 mph, I'd much
rather be able to run it a bit harder...and when I grab the O2 bottle and head
the higher altitudes this will become more important.
Anyone else experienced this and fixed it?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272541#272541
Message 4
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Subject: | Uneven EGTs at full throttle |
Check the inlet manifolds for air leak around the area where the inlets exit
the mix box and that the black joining hose is centre and clamped.
Anthony
-----Original Message-----
From: owner-lightning-list-server@matronics.com
[mailto:owner-lightning-list-server@matronics.com] On Behalf Of Bill Strahan
Sent: Friday, 13 November 2009 12:54 PM
Subject: Lightning-List: Uneven EGTs at full throttle
Anyone else experiencing very different EGTs at full throttle? I will see
one set of cylinders running 1300-1390 and the other side 980-1050.
2,4,6 are the cold ones. 1,3,5 are the hot ones. As soon as I throttle
back, the EGT drops on the hot side and comes up on the cold side until
they're all within about 30 degrees.
This occurs at all altitudes, and is particularly troublesome because I
can't run full throttle at altitude. At 12,500 the hot side is hot as ever,
but the cold side is all in the 900s and the engine is pretty rough. Worst
I've seen is just over 1400 on #5 while running 950 on #4. In that
situation, as soon as I pulled the throttle back to about 5 gph #5 dropped
to 1370 and #4 came up to 1360!
While it's fun to put along at 4 gph at 12,500 doing close to 140 mph, I'd
much rather be able to run it a bit harder...and when I grab the O2 bottle
and head the higher altitudes this will become more important.
Anyone else experienced this and fixed it?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272541#272541
Message 5
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Subject: | Re: Uneven EGTs at full throttle |
Bill,
I am having a similar experience; the left side (particularly 4 and 6)
run in the 1100's during full throttle climb while the right side runs in
the high 1300's and sometimes over 1400 during climb. When I reduce power
in cruise, they get closer but generally run 100-150 degrees difference
between the two sides.
I tried an insert in the scat hose connected to the carb but it didn't
change anything. I now have a couple fiberglas tubes to insert between scat
and carb intake. Haven't been able to get them on yet but hope to soon to
see if that makes a difference.
I'll let you know how it turns out.
Linda
----- Original Message -----
From: "Bill Strahan" <bill@gdsx.com>
Sent: Thursday, November 12, 2009 8:54 PM
Subject: Lightning-List: Uneven EGTs at full throttle
>
> Anyone else experiencing very different EGTs at full throttle? I will see
> one set of cylinders running 1300-1390 and the other side 980-1050.
>
> 2,4,6 are the cold ones. 1,3,5 are the hot ones. As soon as I throttle
> back, the EGT drops on the hot side and comes up on the cold side until
> they're all within about 30 degrees.
>
> This occurs at all altitudes, and is particularly troublesome because I
> can't run full throttle at altitude. At 12,500 the hot side is hot as
> ever, but the cold side is all in the 900s and the engine is pretty rough.
> Worst I've seen is just over 1400 on #5 while running 950 on #4. In that
> situation, as soon as I pulled the throttle back to about 5 gph #5 dropped
> to 1370 and #4 came up to 1360!
>
> While it's fun to put along at 4 gph at 12,500 doing close to 140 mph, I'd
> much rather be able to run it a bit harder...and when I grab the O2 bottle
> and head the higher altitudes this will become more important.
>
> Anyone else experienced this and fixed it?
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=272541#272541
>
>
>
Message 6
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Subject: | Re: Uneven EGTs at full throttle |
catalpaaviation(at)wideba wrote:
> Check the inlet manifolds for air leak around the area where the inlets exit
> the mix box and that the black joining hose is centre and clamped.
>
> Anthony
>
> --
Not sure how I'd check for this. Also, does it make sense that this only happens
at full throttle?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272558#272558
Message 7
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Subject: | Re: Uneven EGTs at full throttle |
Hullo Bill,
To check inlets (by the way this happened to me) take off rubber joiners on
inlets and then try and shift the tube by hand to the intake distributor, if
it moves most likely it is leaking. The tubes have a rubber "O" ring but
sometimes it leaks, they don't always seal, I took the tubes out and cleaned
etc and replaced them using heat resistant silicon, that worked, the one
cylinder that was lean then was the same as the rest. The other thing you
could try is to check that the inlets where they bolt to the head have
gaskets and they are working. I have heard that the bolts sometimes are too
long and bottom out before the inlet (or exhaust) pipes are tight. Check
bolt length by removing one bolt and measuring hole depth. Yes it would
make sense that at full throttle it would run lean as the engine is working
harder. The only other thing is, is the air that flows around the cylinders
inhibited in any way as it exits, in other words have you placed a cover
around the fuel pump? If so remove it.
Best of luck
Anthony
-----Original Message-----
From: owner-lightning-list-server@matronics.com
[mailto:owner-lightning-list-server@matronics.com] On Behalf Of Bill Strahan
Sent: Friday, 13 November 2009 3:44 PM
Subject: Lightning-List: Re: Uneven EGTs at full throttle
catalpaaviation(at)wideba wrote:
> Check the inlet manifolds for air leak around the area where the inlets
exit
> the mix box and that the black joining hose is centre and clamped.
>
> Anthony
>
> --
Not sure how I'd check for this. Also, does it make sense that this only
happens at full throttle?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272558#272558
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