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stephan(at)scassel.se
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 Posted: Tue Oct 16, 2012 9:16 am Post subject: Mod 73 - slightly different |
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Hi Europa pilots/builders
I did the mod 73 per instructions five years ago and at first it looked good. After a short while the play was back.
My assembly was perhaps a bit tighter then normal so the Loctite did not penetrate enough.
In order to get rid of the play I made “special” washer, situated inside the torque tube. Now it was possible to tight the tubes hard together.
The result was a zero play system. Complete solid for 5 year (340 hours) . I know another builder that has solved the play in the same fashion with complete success.
Here is draft drawing that shows the parts involved. In my case it was only necessary to change the outer bolts:
http://aero2012.scassel.se/Images/tailplanemod.PNG
It is necessary to create a spanner with looong shank. I used a wooden stick and strapped the spanner to it. After 30-40 minutes and some swearing (not much) it was tight, very tight I may add.
Additionally I made a thin black line, 4-5 cm long, on fuselage when TP trailing edge was fully down, parallel with TP skin. This reference line makes it very easy to catch very small play over time.
So far the TP is still on the reference line. I check this on every pre flight.
Best regards
Stephan
LN-STE Mono in Norway.
[quote][b]
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wdaniell.longport(at)gmai
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| Posted: Tue Oct 16, 2012 11:06 am Post subject: Mod 73 - slightly different |
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Stephan
How on earth did you get the washers lined up? Or are they not two pieces but one “mini sleeve” as it were?
Will
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of Stephan Cassel
Sent: 16 October 2012 12:16
To: europa-list(at)matronics.com
Subject: Re: Re: Mod 73 - slightly different
Hi Europa pilots/builders
I did the mod 73 per instructions five years ago and at first it looked good. After a short while the play was back.
My assembly was perhaps a bit tighter then normal so the Loctite did not penetrate enough.
In order to get rid of the play I made “special” washer, situated inside the torque tube. Now it was possible to tight the tubes hard together.
The result was a zero play system. Complete solid for 5 year (340 hours) . I know another builder that has solved the play in the same fashion with complete success.
Here is draft drawing that shows the parts involved. In my case it was only necessary to change the outer bolts:
http://aero2012.scassel.se/Images/tailplanemod.PNG
It is necessary to create a spanner with looong shank. I used a wooden stick and strapped the spanner to it. After 30-40 minutes and some swearing (not much) it was tight, very tight I may add.
Additionally I made a thin black line, 4-5 cm long, on fuselage when TP trailing edge was fully down, parallel with TP skin. This reference line makes it very easy to catch very small play over time.
So far the TP is still on the reference line. I check this on every pre flight.
Best regards
Stephan
LN-STE Mono in Norway.
| Quote: | | http://www.matronics.com/Navigator?Europa-List |
01234567
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grahamsingleton(at)btinte
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| Posted: Tue Oct 16, 2012 12:48 pm Post subject: Mod 73 - slightly different |
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Stephan
that's a very neat solution. In fact it's probably the smartest answer I've seen yet.
Graham
From: Stephan Cassel <stephan(at)scassel.se>
To: europa-list(at)matronics.com
Sent: Tuesday, 16 October 2012, 18:15
Subject: Re: Re: Mod 73 - slightly different
Hi Europa pilots/builders
I did the mod 73 per instructions five years ago and at first it looked good. After a short while the play was back.
My assembly was perhaps a bit tighter then normal so the Loctite did not penetrate enough.
In order to get rid of the play I made “special” washer, situated inside the torque tube. Now it was possible to tight the tubes hard together.
The result was a zero play system. Complete solid for 5 year (340 hours) . I know another builder that has solved the play in the same fashion with complete success.
Here is draft drawing that shows the parts involved. In my case it was only necessary to change the outer bolts:
http://aero2012.scassel.se/Images/tailplanemod.PNG
It is necessary to create a spanner with looong shank. I used a wooden stick and strapped the spanner to it. After 30-40 minutes and some swearing (not much) it was tight, very tight I may add.
Additionally I made a thin black line, 4-5 cm long, on fuselage when TP trailing edge was fully down, parallel with TP skin. This reference line makes it very easy to catch very small play over time.
So far the TP is still on the reference line. I check this on every pre flight.
Best regards
Stephan
LN-STE Mono in Norway.
[quote]
href="http://www.matronics.com/Navigator?Europa-List">http://www.matroniclow" target="_blank" href="http://forums.matronics.com/">http://forums.= --> [b]
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kpeng
Joined: 01 Apr 2011
Posts: 18
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| Posted: Tue Oct 16, 2012 2:03 pm Post subject: Mod 73 - slightly different |
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Hi guys,
Maybe if a slot is machined across the flat side of the special washer the size of the nut across the flats there would be no need for a long handle and lots of swearing 
Regards
Kevin
Ps an EDM wire cutting m/c would do the job curve and all.
Sent from my iPhone
On 16 Oct 2012, at 21:47, GRAHAM SINGLETON <grahamsingleton(at)btinternet.com (grahamsingleton(at)btinternet.com)> wrote:
| Quote: | Stephan
that's a very neat solution. In fact it's probably the smartest answer I've seen yet.
Graham
From: Stephan Cassel <stephan(at)scassel.se (stephan(at)scassel.se)>
To: europa-list(at)matronics.com (europa-list(at)matronics.com)
Sent: Tuesday, 16 October 2012, 18:15
Subject: Re: Re: Mod 73 - slightly different
Hi Europa pilots/builders
I did the mod 73 per instructions five years ago and at first it looked good. After a short while the play was back.
My assembly was perhaps a bit tighter then normal so the Loctite did not penetrate enough.
In order to get rid of the play I made “special” washer, situated inside the torque tube. Now it was possible to tight the tubes hard together.
The result was a zero play system. Complete solid for 5 year (340 hours) . I know another builder that has solved the play in the same fashion with complete success.
Here is draft drawing that shows the parts involved. In my case it was only necessary to change the outer bolts:
http://aero2012.scassel.se/Images/tailplanemod.PNG
It is necessary to create a spanner with looong shank. I used a wooden stick and strapped the spanner to it. After 30-40 minutes and some swearing (not much) it was tight, very tight I may add.
Additionally I made a thin black line, 4-5 cm long, on fuselage when TP trailing edge was fully down, parallel with TP skin. This reference line makes it very easy to catch very small play over time.
So far the TP is still on the reference line. I check this on every pre flight.
Best regards
Stephan
LN-STE Mono in Norway.
|
[quote][b]
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stephan(at)scassel.se
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| Posted: Wed Oct 17, 2012 12:15 am Post subject: Mod 73 - slightly different |
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Hi Will,
One washer on each bolt.
I guess there many different approaches and mine was probably not the best but it made my day.
The washer was mounted on a wooden stick (about 1/2” x 1/2") A slot was made that hold the washer on place.
Tight. You have to press the washer into the slot. It was quite easy to put the washer on the bolt.
Same stick (but the opposite side) was used in order to create a long handle to the spanner.
A mark was made on the stick so I know exactly how far in the tube I was. The other hand on the bolt.
The first tree were quite easy. On the fourth and last nut the washer went off and I had to rig the washer again.
( A small swearing was fired)
Best regards
Stephan
LN-STE Mono [quote][b]
| | - The Matronics Europa-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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grahamsingleton(at)btinte
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| Posted: Wed Oct 17, 2012 12:21 am Post subject: Mod 73 - slightly different |
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Stephan
If I may say so, good Norwegian practicality and logic. I congratulate you.
Graham
From: SCASSEL <stephan(at)scassel.se>
To: europa-list(at)matronics.com
Sent: Wednesday, 17 October 2012, 9:14
Subject: Re: Mod 73 - slightly different
Hi Will,
One washer on each bolt.
I guess there many different approaches and mine was probably not the best but it made my day.
The washer was mounted on a wooden stick (about 1/2” x 1/2") A slot was made that hold the washer on place.
Tight. You have to press the washer into the slot. It was quite easy to put the washer on the bolt.
Same stick (but the opposite side) was used in order to create a long handle to the spanner.
A mark was made on the stick so I know exactly how far in the tube I was. The other hand on the bolt.
The first tree were quite easy. On the fourth and last nut the washer went off and I had to rig the washer again.
( A small swearing was fired)
Best regards
Stephan
LN-STE Mono
[quote]http://www.matro====================
[b]
| | - The Matronics Europa-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?Europa-List |
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wdaniell.longport(at)gmai
Guest
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| Posted: Sat Oct 20, 2012 10:10 am Post subject: Mod 73 - slightly different |
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Stephan
Thanks for the idea. I shall do something very similar I think except mine will be easier because I still have the top off. Less swearing.
Will
From: owner-europa-list-server(at)matronics.com [mailto:owner-europa-list-server(at)matronics.com] On Behalf Of SCASSEL
Sent: 17 October 2012 03:15
To: europa-list(at)matronics.com
Subject: Re: Mod 73 - slightly different
Hi Will,
One washer on each bolt.
I guess there many different approaches and mine was probably not the best but it made my day.
The washer was mounted on a wooden stick (about 1/2” x 1/2") A slot was made that hold the washer on place.
Tight. You have to press the washer into the slot. It was quite easy to put the washer on the bolt.
Same stick (but the opposite side) was used in order to create a long handle to the spanner.
A mark was made on the stick so I know exactly how far in the tube I was. The other hand on the bolt.
The first tree were quite easy. On the fourth and last nut the washer went off and I had to rig the washer again.
( A small swearing was fired)
Best regards
Stephan
LN-STE Mono | Quote: | | http://www.matronics.com/Navigator?Europa-List< - MATRONICS WEB FORUMS - |
01234567
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budyerly(at)msn.com
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| Posted: Sat Oct 20, 2012 1:36 pm Post subject: Mod 73 - slightly different |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> [img]cid:00e401cdaf0a$3B2B00E7(at)goldfishbk2xxe[/img][img]cid:00e501cdaf0a$3B2B00E7(at)goldfishbk2xxe[/img] Photo E-mail [url=https://skydrive.live.com/redir.aspx?cid=2161856909618aa7&page=play&resid=2161856909618AA7!280&type=5&authkey=!ANjvqrEIxO9rAbE]View slideshow [/url]| [url=https://skydrive.live.com/redir.aspx?cid=2161856909618aa7&page=downloadphotos&resid=2161856909618AA7!280&type=5&authkey=!ANjvqrEIxO9rAbE]Download images [/url] Stephan,
Richard did a great job on his mod. I have attached a drawing of our solution which differed only in that the nutplates were riveted to a tube horizontally and 1/4 inch bolts used. (see drawing) It was never submitted as I had a local machine shop that could put out the work for about $300 and make new holes and pins, or if the 3/8 pins weren't installed yet, we could machine the holes to a zero tolerance fit. A drop of Loctite or two and the whole thing stayed solid for so far, 3 years. So we dropped pursuing the idea. Richard's mod 11969 is a perfectly sound solution that should work. I just felt that Redux on the nutplate was a bit tedious when a rivet could be put into a steel tube quickly. I used a 1 1/4 inch tube (Sloppy fit for ease of moving into position into an existing stab, slotted it on the bandsaw, slid it in and marked the holes with a centering punch (inserted into a 1/4 inch tube to center the punch on the hole and gave it a try. A $10 experiment, that works, but it too is tedious. When Roger Bull came out with the Loctite solution and got it all approved, I sure liked not having to go through approvals when what he did works. You know us Yanks, instant gratification.
Regards,
Bud Yerly
[url=https://skydrive.live.com/redir.aspx?cid=2161856909618aa7&page=play&resid=2161856909618AA7!281&parid=2161856909618AA7!280&type=1&authkey=!ANjvqrEIxO9rAbE][img]cid:00e601cdaf0a$3B2B00E7(at)goldfishbk2xxe[/img][/url]
[quote] ---
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