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Rowland_Carson
Joined: 04 Jul 2008
Posts: 155
Location: Cheltenham, England
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 Posted: Wed Jun 24, 2009 6:35 am Post subject: aileron etc weights [was: Europa 4-seater] |
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At 2009-06-24 13:12 +0300 Raimo Toivio wrote:
| Quote: | I called Andy Draper 26. January 2000 and he stated "The Ideal
weight of the umpainted aileron is around 1100 grams +/- 10%". I was
so happy my ailerons were 1126 grams /stbd and 1150 grams /port
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Raimo - please tell me that was BEFORE you added the horn balances! I
didn't weigh mine until after the horns were added and they came out
at 2505g (starboard) and 2495g (port) which seems unbelievably heavy
in comparison.
I did weigh the lead weights before they were fitted to the horns and
they were about 520g each, so subtracting 2 of those gives about
1460g for the aileron structure without the lead.
My flaps seem pretty heavy too - they are 3285g (starboard) and 3225g (port).
None of the above are profiled or painted yet, they are just as laid
up, with the peel-ply removed.
Any comments from others who have weighed their control surfaces?
regards
Rowland
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| Rowland Carson LAA #16532 http://home.clara.net/rowil/aviation/
| 1280 hours building Europa #435 G-ROWI e-mail <rowil(at)clara.net>
| | - 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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raimo.toivio(at)rwm.fi
Guest
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| Posted: Wed Jun 24, 2009 7:39 am Post subject: aileron etc weights [was: Europa 4-seater] |
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Row - take it easy!
That "ideal weight for ailerons" was
- just after removing peel ply
- before horns
- before mass balances
and even
- before hinges!
I am sure your ailerons are first class and strong enough.
I could not find easily "ideal weights" or "my weights" for the flaps but I have a memory they were around 2500 grams WITHOUT hinges again.
I think some kind of the proof of the high quality workmanship is that your weights between port and stbd-side flaps and ailerons are so near with each others ( flaps 3285g and 3225g - that means less than 2%, ailerons at 2505g and 2495g, that means less than 0,4% !!!).
Instead of that I found a rudder weight. That was 1813 grams WITH rudder horn but before surface (and Mr Neville Eyre stated 1/12/1999 1800 grams would be ideal and sooooo happy I were).
Are you happy now?
Raimo OH-XRT
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Rowland_Carson
Joined: 04 Jul 2008
Posts: 155
Location: Cheltenham, England
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| Posted: Wed Jun 24, 2009 9:54 am Post subject: aileron etc weights [was: Europa 4-seater] |
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At 2009-06-24 18:39 +0300 Raimo Toivio wrote:
| Quote: | Instead of that I found a rudder weight. That was 1813 grams WITH
rudder horn but before surface
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Raimo - I didn't weigh my rudder before I profiled and gel-coat
finished it (didn't have a handy digital fish scale or baggage scale
back then). It is now 2905g with hinges fitted and horn in LE for
pushrod control. I think I applied the Schwabellack gel-coat about 5
times and rubbed almost all of it off again before discovering where
to STOP rubbing! So, there may be a bit more weight in the finish
than is ideal. But, you have to start practising somewhere ...
| Quote: | Neville Eyre stated 1/12/1999 1800 grams would be ideal
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I wish these "ideal" component weights had been advertised a bit more
widely back then - they would have been a guide to how well one is
doing in keeping out excess weight (usually excess epoxy on the
control surfaces).
regards
Rowland
--
| Rowland Carson LAA #16532 http://home.clara.net/rowil/aviation/
| 1280 hours building Europa #435 G-ROWI e-mail <rowil(at)clara.net>
| | - 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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raimo.toivio(at)rwm.fi
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| Posted: Wed Jun 24, 2009 12:23 pm Post subject: aileron etc weights [was: Europa 4-seater] |
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| Quote: | I wish these "ideal" component weights had been advertised a bit more
widely back then - they would have been a guide to how well one is
doing in keeping out excess weight (usually excess epoxy on the
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Row,
That information was there just because I called factory and asked during those days.
That was because I HAD NO IDEA WHAT´S THE QUALITY OF MY WORK.
Could you imagine the situation to be *only one* in the country building Europa or even ANY composite plane?
I promise that was a lonely man project.
You englismen will find almost a nearest village and a nearest Europa builder is there - is not that so?
Anyway - I do think "ideal weights" come "automatically" after a good workmanship.
You have proved it. Me too.
That is because weldone manual - thanks to Europa factory, Andy and Nev I think.
Raimo OH-XRT
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