Europa-List Digest Archive

Wed 07/05/17


Total Messages Posted: 6



Today's Message Index:
----------------------
 
     1. 06:41 AM - Aileron LE Vee layup (n7188u)
     2. 07:22 AM - Re: Aileron LE Vee layup (davidjoyce@doctors.org.uk)
     3. 08:32 AM - Re: Aileron LE Vee layup (Rowland Carson)
     4. 09:53 AM - Re: Aileron LE Vee layup (n7188u)
     5. 06:08 PM - Re: Aileron LE Vee layup (n7188u)
     6. 06:37 PM - Re: Re: Aileron LE Vee layup (Pete)
 
 
 


Message 1


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    Time: 06:41:05 AM PST US
    Subject: Aileron LE Vee layup
    From: "n7188u" <chmgarb@gmail.com>
    Hello to the Europa community, I am making good progress on my XS and have the two ailerons skinned. A little slow due to vacation and work travel but getting there. I am in the process of doing the layup for the leading edge vee cutout for the aileron hinges (step 5) and I have a question: Can you do this layup with a single length of 45 biased BID or do you need to splice two pieces? BID can be stretched (with corresponding change in fiber bias) but its generally acceptable up to point. I starter with 6-5 inch wide strips but at a final 4 inches wide I am just a hair short of the full aileron length. It's possible that a wider piece may do it but I am starting to feel I am pushing it too hard. Just trying to see what people did since the manual makes you believe a single long piece will be enough (no mention of splicing or cutting more than two full length pieces). BTW, I do have a web site where I am documenting my build. Will make the address public soon! Thanks, Chris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470692#470692


    Message 2


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    Time: 07:22:58 AM PST US
    From: davidjoyce@doctors.org.uk
    Subject: Re: Aileron LE Vee layup
    Chris, You may get a definitive answer from a real expert, but I would say that it would not matter whether you : 1. Stretch it to cover; 2. put it on at an angle slightly less than 45 degrees to cover or 3. use an extra piece and overlap the pieces. But I would personally reject 3. as being less neat and heavier. Regards, David Joyce, GXSDJ On 2017-07-05 14:40, n7188u wrote: > > Hello to the Europa community, > > I am making good progress on my XS and have the two ailerons skinned. A little slow due to vacation and work travel but getting there. I am in the process of doing the layup for the leading edge vee cutout for the aileron hinges (step 5) and I have a question: > > Can you do this layup with a single length of 45 biased BID or do you need to splice two pieces? BID can be stretched (with corresponding change in fiber bias) but its generally acceptable up to point. I starter with 6-5 inch wide strips but at a final 4 inches wide I am just a hair short of the full aileron length. It's possible that a wider piece may do it but I am starting to feel I am pushing it too hard. Just trying to see what people did since the manual makes you believe a single long piece will be enough (no mention of splicing or cutting more than two full length pieces). > > BTW, I do have a web site where I am documenting my build. Will make the address public soon! > > Thanks, > Chris > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=470692#470692 [1] > Links: ------ [1] http://forums.matronics.com/viewtopic.php?p=470692#470692 [2] http://www.matronics.com/Navigator?Europa-List [3] http://forums.matronics.com [4] http://wiki.matronics.com [5] http://www.matronics.com/contribution


    Message 3


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    Time: 08:32:04 AM PST US
    Subject: Re: Aileron LE Vee layup
    From: Rowland Carson <rowlandcarson@gmail.com>
    On 2017-07-05, at 14:40, n7188u <chmgarb@gmail.com> wrote: > I am in the process of doing the layup for the leading edge vee cutout for the aileron hinges (step 5) and I have a question: > > Can you do this layup with a single length of 45 biased BID or do you need to splice two pieces? Chris - I had a similar query a long time ago and went to the source (Neville) for the answer. You can see the story on my build journal for 3 January 2003 here: http://www.rowlandcarson.org.uk/aviation/europa_435/200301.php Hope this helps. in friendship Rowland | Rowland Carson ... that's Rowland with a 'w' ... | <rowlandcarson@gmail.com> http://www.rowlandcarson.org.uk | Skype, Twitter: rowland_carson Facebook: Rowland Carson


    Message 4


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    Time: 09:53:10 AM PST US
    Subject: Re: Aileron LE Vee layup
    From: "n7188u" <chmgarb@gmail.com>
    Thank you David and Rowland. As to the options, I am trying to stay away from the overlap. Probably not that bad but it seems the factory intended you to stretch the tape and it would look better. Even Rutan mentioned it's acceptable for most applications (in the LongEZ and Cozy plans, which is what I'm familiar with). My problem is that even with stretch, I am a little short. I'll figure it out since it is obvious per Rowland's log that it is possible. I'm just surprised that they don't have you use two layers of uni at 30 degrees and BID in the aileron hinge reinforcements. By the time you stretch the BID you are probably close to that. Thanks for the reference to your log Rowland. I actually searched through it and the pictures yesterday since you do have a lot of info there. But I just didn't find it since it's difficult to find exactly where in the logs you are building something of particular interest. But thanks to your reference I have it now bookmarked. BTW, when reading your log it's obvious that laying up this vee is a bear of a job!! It seems that doing all the layers in the poly is the way to go but the peel-ply removal seems to be a hughe issue. Maybe I will place it not quite all the way in (stay away from the fillet) and sand the inside a little using the flat permagrit tool. Best regards, Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470695#470695


    Message 5


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    Time: 06:08:04 PM PST US
    Subject: Re: Aileron LE Vee layup
    From: "n7188u" <chmgarb@gmail.com>
    As promised, here is my build website: https://sites.google.com/site/martineuropaxsa291/home Best, Chris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=470708#470708


    Message 6


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    Time: 06:37:49 PM PST US
    Subject: Re: Aileron LE Vee layup
    From: Pete <peterz@zutrasoft.com>
    Great site! Thx! (Im taking notes:) One thing, is you tank bonded in with the epoxy layups? I hope not, and hope there is some sort of release between the tank and the glass...otherwise it *will* crack after it swells from the fuel and shrinks when empty (additional fluorinating reduces this phenomena) Cheers, Pete > On Jul 5, 2017, at 9:07 PM, n7188u <chmgarb@gmail.com> wrote: > > > As promised, here is my build website: > > https://sites.google.com/site/martineuropaxsa291/home > > Best, > Chris > > > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=470708#470708 > > > > > > > > >




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