Today's Message Index:
----------------------
1. 12:02 AM - 912 - Classic - Exhaust Pipe Fracture Survey (William Mills)
2. 12:02 AM - Re: Rivet Question (Tony S. Krzyzewski)
3. 03:18 AM - Failed address./Ed Miller. (R.C.Harrison)
4. 08:05 AM - Undercarriage mounting frame (Ronald J. Parigoris)
5. 08:42 AM - Re: Rivet Question (DuaneFamly@aol.com)
6. 08:55 AM - Re: Undercarriage mounting frame (Rob Housman)
7. 10:16 AM - Re: 912 - Classic - Exhaust Pipe Fracture Survey (Alan Stewart)
8. 01:20 PM - pin holes (paul stewart)
9. 02:15 PM - Re: pin holes (Rob Housman)
10. 02:20 PM - Re: pin holes (R.C.Harrison)
Message 1
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Subject: | 912 - Classic - Exhaust Pipe Fracture Survey |
--> Europa-List message posted by: "William Mills" <combined.merchants@virgin.net>
I have recently had two stress fractures in my 912 / Classic exhaust system. The
first occurred on the outside of the last bend into the silencer from No 2
cylinder (stb front) and the second occurred on the outside of the first bend
in the down-pipe from No 4 cylinder (stb rear). The first was in the form of
a letter "H" with the verticals circumferential and the horizontal longitudinal.
After speaking to Andy, I had it gas welded and it has remained intact. 20
flying hours later the second fracture occurred (fortunately less than 10 miles
from home), which blew apart and caused me to make a semi emergency down-wind
landing, because the vibration with more than 1/4 throttle was unacceptable.
The aircraft has flown just short of 500 hours and operates from a fairly rough
farm strip. The exhaust pipes are mild steel and the box is stainless. I would
like to hear from any other owners details of any exhaust fractures, hours
flown and type of field used (i.e. hard or grass runways etc) I know of at least
one other, but there may be more.
The whole weight of the exhaust system is suspended off the down pipes and the
stub tubes off the box. The inertia when the aircraft is bumping along rough
ground is therefore considerable and I believe is the cause of the stress fractures.
For piece of mind, I have decided to replace the whole exhaust system
and having discussed the problem with Andy, he is very kindly arranging to weld
some supporting lugs to the new silencer box so that I can provide metal straps
to the crankcase and engine mount (cross section member rigid with the crankcase)
to reduce differential movement and resulting stresses. If premature
exhaust failure due to mechanical stress is going to happen, the factory might
consider offering a mod to help support the weight of the system. I have offered
to provide details of the support system I set up for mine.
Best wishes,
William
Message 2
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--> Europa-List message posted by: "Tony S. Krzyzewski" <tonyk@kaon.co.nz>
>> What have other people gotten when they have done this? Am I gonna be
drilling out lots of rivets in order to get these right? Damned this is
fun!
Mike,
At this stage I think I'd accept what you've been able to get them to. I
had an aircraft engineer help me with mine using a bench rivet press
and, after patiently measuring the first two and getting similar results
to you we eyeballed all the rest.
I'll happily fly in my plane with them done like that and I'm pretty
certain that most of the Europa's I've flown in were the same.
Tony
Message 3
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Subject: | Failed address./Ed Miller. |
--> Europa-List message posted by: "R.C.Harrison" <ptag.dev@ukonline.co.uk>
Hi! should Ed Miller be reading this ..... your e-mail address is returning
messages. please recontact me for information requested.
Bob Harrison G-PTAG Europa MKI /Jabiru 3300
Do not archive.
Message 4
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Subject: | Undercarriage mounting frame |
--> Europa-List message posted by: "Ronald J. Parigoris" <rparigor@suffolk.lib.ny.us>
My undercarriage mounting frame for mono wheel is painted white. The surface was
not prepared and the paint is not tuck very well.
What is the best way to clean off old paint, stripper sandblaster?
I do have a free air sandblaster, can beach sand be used?
Also is it a good idea to coat the inner of the open tubes with something like
LPS Procyon ? (May not have correct spelling)
Thanks
Ron Parigoris
Message 5
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Subject: | Re: Rivet Question |
--> Europa-List message posted by: DuaneFamly@aol.com
"Do Not Archive"
Thanks Tony. Glad to hear I'm not alone in this matter. Assembly will
continue today.
Mike Duane A207
Redding, California
XS Trigear
Message 6
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Subject: | Undercarriage mounting frame |
--> Europa-List message posted by: "Rob Housman" <RobH@hyperion-ef.com>
Squawk to the factory for a replacement. The powder coating should not be
coming off but what does not come off by itself will probably be rather
difficult for you to remove. Then you need to re-coat the thing. It's not
worth your time and money to fix it.
Eventually you will reach a point in the construction where you plug the
inside of the open ends with high temperature silicone sealant.
Best regards,
Rob Housman
Europa XS Tri-Gear A070
Airframe complete
Irvine, CA
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of Ronald J.
Parigoris
Subject: Europa-List: Undercarriage mounting frame
--> Europa-List message posted by: "Ronald J. Parigoris"
<rparigor@suffolk.lib.ny.us>
My undercarriage mounting frame for mono wheel is painted white. The surface
was
not prepared and the paint is not tuck very well.
What is the best way to clean off old paint, stripper sandblaster?
I do have a free air sandblaster, can beach sand be used?
Also is it a good idea to coat the inner of the open tubes with something
like
LPS Procyon ? (May not have correct spelling)
Thanks
Ron Parigoris
Message 7
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Subject: | 912 - Classic - Exhaust Pipe Fracture Survey |
--> Europa-List message posted by: "Alan Stewart" <alan.stewart@blueyonder.co.uk>
Hello William,
My 912 'classic' Europa has flown for just under 600 hours and has a
very great number of take-offs and landings (higher than average),
mostly from a relatively smooth grass strip.
I have had 2, non-catastrophic exhaust failures in that time.
On the first occasion, after around 200 hours, a hole appeared in the
upper portion of the exhaust, probably related to a 'wire-wool' type
heat insulating material covering. (did it encourage condensation ?) The
insulation is now, no longer used. The engine became much noisier,
though the aircraft remained perfectly flyable. The failed pipe was
replaced.
On the second occasion, a hole appeared around 400 hours around the
'crossover' point of the exhaust downpipes and was only spotted on
inspection.
I can dig out more details, if you write me.
Alan
I've stopped 271 spam messages. You can too!
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-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of William
Mills
Subject: Europa-List: 912 - Classic - Exhaust Pipe Fracture Survey
--> Europa-List message posted by: "William Mills"
<combined.merchants@virgin.net>
I have recently had two stress fractures in my 912 / Classic exhaust
system. The first occurred on the outside of the last bend into the
silencer from No 2 cylinder (stb front) and the second occurred on the
outside of the first bend in the down-pipe from No 4 cylinder (stb
rear). The first was in the form of a letter "H" with the verticals
circumferential and the horizontal longitudinal. After speaking to
Andy, I had it gas welded and it has remained intact. 20 flying hours
later the second fracture occurred (fortunately less than 10 miles from
home), which blew apart and caused me to make a semi emergency down-wind
landing, because the vibration with more than 1/4 throttle was
unacceptable.
The aircraft has flown just short of 500 hours and operates from a
fairly rough farm strip. The exhaust pipes are mild steel and the box
is stainless. I would like to hear from any other owners details of any
exhaust fractures, hours flown and type of field used (i.e. hard or
grass runways etc) I know of at least one other, but there may be more.
The whole weight of the exhaust system is suspended off the down pipes
and the stub tubes off the box. The inertia when the aircraft is
bumping along rough ground is therefore considerable and I believe is
the cause of the stress fractures. For piece of mind, I have decided to
replace the whole exhaust system and having discussed the problem with
Andy, he is very kindly arranging to weld some supporting lugs to the
new silencer box so that I can provide metal straps to the crankcase and
engine mount (cross section member rigid with the crankcase) to reduce
differential movement and resulting stresses. If premature exhaust
failure due to mechanical stress is going to happen, the factory might
consider offering a mod to help support the weight of the system. I
have offered to provide details of the support system I set up for mine.
Best wishes,
William
Message 8
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--> Europa-List message posted by: "paul stewart" <paul-d.stewart@virgin.net>
Having thought we were doing quite well with a 6HP vacuum to reveal pin holes,
the application of a compressed air blower has revealed yet more of the little
b*****s. Are we correct in continuing to fill and sand until the last pin hole
is banished or does primer take care of the odd one or two?
We are using superfil and intend to prime with smooth prime.
Regards
Paul Stewart #432
Message 9
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--> Europa-List message posted by: "Rob Housman" <RobH@hyperion-ef.com>
Since you are already using the Polyfiber's SuperFil and Smooth Prime
products you must know about their Pre-Prime Sealer ("the pinhole killer").
Polyfiber's literature makes it clear that the Primer alone will not fill
pinholes and accordingly recommends three rolled-on coats of Sealer (two
coats in quick succession followed by a final coat after the first two fully
cure). My project now has only the first two coats, so I can't tell you
that it really kills pinholes, but I have no reason to doubt the claims.
One other advantage to this product is that it has a glossy finish making it
much easier to see imperfections that I missed when I sanded. Fortunately
SuperFil can be applied directly over the Sealer.
I have developed an allergic reaction to the Aeropoxy stuff, and now have
discovered that the Pre-Prime Sealer likewise causes a reaction so I use a
respirator with a cartridge that absorbs organics as well as filtering dust.
That helps a lot.
Best regards,
Rob Housman
Europa XS Tri-Gear A070
Airframe complete
Irvine, CA
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of paul stewart
Subject: Europa-List: pin holes
--> Europa-List message posted by: "paul stewart"
<paul-d.stewart@virgin.net>
Having thought we were doing quite well with a 6HP vacuum to reveal pin
holes, the application of a compressed air blower has revealed yet more of
the little b*****s. Are we correct in continuing to fill and sand until the
last pin hole is banished or does primer take care of the odd one or two?
We are using superfil and intend to prime with smooth prime.
Regards
Paul Stewart #432
Message 10
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--> Europa-List message posted by: "R.C.Harrison" <ptag.dev@ukonline.co.uk>
Hi! Paul.
You should leave the pin holes and "rag" them full with a roller of smooth
prime. "Ragging" is to scrub the smooth prime into the pin holes with the
corner of the roller.
Regards
Bob Harrison G-PTAG
-----Original Message-----
From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com]On Behalf Of paul stewart
Subject: Europa-List: pin holes
--> Europa-List message posted by: "paul stewart"
<paul-d.stewart@virgin.net>
Having thought we were doing quite well with a 6HP vacuum to reveal pin
holes, the application of a compressed air blower has revealed yet more of
the little b*****s. Are we correct in continuing to fill and sand until the
last pin hole is banished or does primer take care of the odd one or two?
We are using superfil and intend to prime with smooth prime.
Regards
Paul Stewart #432
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