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ggower_99(at)yahoo.com
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 Posted: Mon Nov 23, 2009 10:12 am Post subject: Zenith-List:Re: Any changes in flight characteristics with t |
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Geee... reading this post, I remember what the old timers always told us:
"Only add lightness and simplicity to your homebuilt.
Perfection is not when there is nothing more to add, but when there is nothing more to remove ". Antoine de Saint-Exupéry
"Building your airplane light should not be your goal, but your obsesion".
Saludos
Gary Gower
Flying from Chapala, Mexico.
--- On Mon, 11/23/09, Pete54 <peter.morris(at)optimusaberdeen.com> wrote:
| Quote: |
From: Pete54 <peter.morris(at)optimusaberdeen.com>
Subject: Re: Any changes in flight characteristics with the LAA changes?
To: zenith-list(at)matronics.com
Date: Monday, November 23, 2009, 4:14 AM
--> Zenith-List message posted by: "Pete54" <peter.morris(at)optimusaberdeen.com (peter.morris(at)optimusaberdeen.com)>
After all the messing about - no the ailerons feel just the same! They do neatly return to neutral on the ground but I could detect no difference in the air.
The other mods - which you'll be spared I think, have more effect. All the UK XLs have an enlarged trim tab, with most also having a spring connect between the flaps and elevators. This now has to be removed (and the trimmer horn reversed).
The result is that the longitudinal stability in cruising flight is much improved. Previously you could get a 20 kt increase in speed just by lightly pushing the stick - that now needs much more force. Indeed the dive to Vne takes some push. The downside is that you run out of trim a little before half flap has run down. The LAA may introduce a further modifications to deal with that!!
--------
Pete Morris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=274387#274387.matronics.com/contribution" target=_blank>http://www.matronics.com/contr -Matt Dralle, List onics.com/Navigator?Zenith-List" target=_blank>http://www.matronics.com/N= - MATRONICS =========
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Pete54
Joined: 27 Aug 2009
Posts: 19
Location: Scotland
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| Posted: Mon Nov 23, 2009 1:56 pm Post subject: Re: Zenith-List:Re: Any changes in flight characteristics wi |
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Please do not get me started! The large trim tab was because the first UK example of the xl had a forward C of G - and the larger tab sorted it!
The spring came about to extend the C of G range because a number of European and UK aircraft had an aft c of g!!!!
And I fly in an environment where I have to have an 'approved' design and without that everything is illegal.
So yeah it sucks, but flying is still worth it.
The whole situation is a mess with now 5 populations of aircraft (at least!). The European 'microlights', notionally 450kg but actually a fair bit heavier (max empty weight is supposed to be less than 268kg!!!!), the UK modified bunch (about 25 aircraft at 560kg max) and the US models - LSA, EXP and ELSA at all sorts of weights.
Add lightness? If only......................................................
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