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vk3eka(at)bigpond.net.au
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 Posted: Fri May 14, 2010 3:19 am Post subject: Alieron Trim |
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Hi Guys,
Having flown a few hours now, I find that, as expected, with full flap deployed the elevator trim “bottoms out” before balanced trim is available.
I had a look at the LAA (UK) solution but found that my elevator trim tab is already at max downward travel and butts up against the elevator. Changing the tab horn would not make any difference to the travel available.
I have an O-200 fitted and expect there is a little more weight up front than a Jab or similar.
What have others done? I am thinking of adding a tab to the existing trim tab to increase its size, therefore providing more effect on the elevator.
Cheers
Peter
Wonthaggi Australia
http://zodiac.cpc-world.com
[quote][b]
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bryanmmartin
Joined: 10 Jan 2006
Posts: 1018
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| Posted: Fri May 14, 2010 4:02 am Post subject: Alieron Trim |
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I riveted a sheet of aluminum onto my trim tab that just about doubled its area. The sheet is bent downward over the trailing edge of the trim tab to provide even more trim. I have the original small trim tab that just spans between two of the elevator ribs. I still can't trim out the plane with full flaps unless I have a full load and aft CG, but I usually don't use full flaps until short final anyway so I don't mind it much.
I also have a bungee cord attached to the stick that provides some nose up trim. It's just enough to balance the weight of the elevator (the bungee holds the elevator in the neutral position on the ground).
On May 14, 2010, at 7:15 AM, Peter W Johnson wrote:
| Quote: | Hi Guys,
Having flown a few hours now, I find that, as expected, with full flap deployed the elevator trim “bottoms out” before balanced trim is available.
I had a look at the LAA (UK) solution but found that my elevator trim tab is already at max downward travel and butts up against the elevator. Changing the tab horn would not make any difference to the travel available.
I have an O-200 fitted and expect there is a little more weight up front than a Jab or similar.
What have others done? I am thinking of adding a tab to the existing trim tab to increase its size, therefore providing more effect on the elevator.
Cheers
Peter
Wonthaggi Australia
http://zodiac.cpc-world.com
|
--
Bryan Martin
N61BM, CH 601 XL,
RAM Subaru, Stratus redrive.
do not archive.
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_________________
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Bryan Martin
N61BM, CH 601 XL, Stratus Subaru.
do not archive. |
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psm(at)att.net
Guest
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| Posted: Fri May 14, 2010 4:12 am Post subject: Alieron Trim |
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Hi Peter,
I am currently building a Wittman Buttercup which uses springs and levers for trim rather than an aerodynamic trim tab like the one on the Zodiac. I don't know exactly how you might implement this kind of trim, but it is an idea to consider.
The notion is that a spring applies force to the elevator cable to reduce the force needed on the stick. By adding a control lever you can adjust the amount of force applied by the spring or springs.
I have seen a variation of this idea to apply rudder trim in a Cessna 172-XP. In that case some bungee cord is used along with a lever and retaining slots for the lever.
One advantage of using springs over tabs is the springs don't add any aerodynamic drag.
Paul
Xl - installing upgrade
From: owner-zenith601-list-server(at)matronics.com [mailto:owner-zenith601-list-server(at)matronics.com] On Behalf Of Peter W Johnson
Sent: Friday, May 14, 2010 4:16 AM
To: zenith-list(at)matronics.com; zenith601-list(at)matronics.com
Subject: Alieron Trim
Hi Guys,
Having flown a few hours now, I find that, as expected, with full flap deployed the elevator trim “bottoms out” before balanced trim is available.
I had a look at the LAA (UK) solution but found that my elevator trim tab is already at max downward travel and butts up against the elevator. Changing the tab horn would not make any difference to the travel available.
I have an O-200 fitted and expect there is a little more weight up front than a Jab or similar.
What have others done? I am thinking of adding a tab to the existing trim tab to increase its size, therefore providing more effect on the elevator.
Cheers
Peter
Wonthaggi Australia
http://zodiac.cpc-world.com
| Quote: | | http://www.matronics.com/Navigator?Zenith601-List |
0123456789
[quote][b]
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mhubel
Joined: 05 Sep 2009
Posts: 141
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| Posted: Fri May 14, 2010 4:54 am Post subject: Alieron Trim |
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Peter,
Early in the testing of my 601, I decided that not being able to trim properly on final was not acceptable. I put in a spring to counter balance the weight of the elivator on the ground. With that it can be properly trimmed with flaps.
There are some pictures of this on photo.hubbles.com
On 5/14/2010 7:15 AM, Peter W Johnson wrote: [quote] <![endif]--> <![endif]-->
Hi Guys,
Having flown a few hours now, I find that, as expected, with full flap deployed the elevator trim “bottoms out” before balanced trim is available.
I had a look at the LAA (UK) solution but found that my elevator trim tab is already at max downward travel and butts up against the elevator. Changing the tab horn would not make any difference to the travel available.
I have an O-200 fitted and expect there is a little more weight up front than a Jab or similar.
What have others done? I am thinking of adding a tab to the existing trim tab to increase its size, therefore providing more effect on the elevator.
Cheers
Peter
Wonthaggi Australia
http://zodiac.cpc-world.com
| Quote: |
href="http://www.matronics.com/Navigator?Zenith601-List">http://www.matronics.com/Navigator?Zenith601-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
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Mark Hubelbank
NorthEast Monitoring
2 Clock Tower Place
Suite 555
Maynard, MA, 01754 - USA
mhubel(at)nemon.com (mhubel(at)nemon.com)
978-443-3955[b]
| | - The Matronics Zenith601-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?Zenith601-List |
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_________________
Mark Hubelbank
N708HU
CH601XL
Jabiru 3300
Rotec TBI 40-3 carb
Sensenich ground adj prop.
240 hr TAF
Pictures at photo.hubbles.com |
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Afterfxllc(at)aol.com
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| Posted: Fri May 14, 2010 8:39 am Post subject: Alieron Trim |
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Do you have the old style trim tab or the new style?
In a message dated 5/14/2010 7:55:15 A.M. Central Daylight Time, mhubel(at)nemon.com writes:
| Quote: | Peter,
Early in the testing of my 601, I decided that not being able to trim properly on final was not acceptable. I put in a spring to counter balance the weight of the elivator on the ground. With that it can be properly trimmed with flaps.
There are some pictures of this on photo.hubbles.com
On 5/14/2010 7:15 AM, Peter W Johnson wrote: | Quote: |
Hi Guys,
Having flown a few hours now, I find that, as expected, with full flap deployed the elevator trim “bottoms out” before balanced trim is available.
I had a look at the LAA (UK) solution but found that my elevator trim tab is already at max downward travel and butts up against the elevator. Changing the tab horn would not make any difference to the travel available.
I have an O-200 fitted and expect there is a little more weight up front than a Jab or similar.
What have others done? I am thinking of adding a tab to the existing trim tab to increase its size, therefore providing more effect on the elevator.
Cheers
Peter
Wonthaggi Australia
http://zodiac.cpc-world.com
| Quote: |
href="http://www.matronics.com/Navigator?Zenith601-List">http://www.matronics.com/Navigator?Zenith601-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
|
--
Mark Hubelbank
NorthEast Monitoring
2 Clock Tower Place
Suite 555
Maynard, MA, 01754 - USA
mhubel(at)nemon.com (mhubel(at)nemon.com)
978-443-3955
====================================
t href="http://www.matronics.com/Navigator?Zenith601-List">http://www.matronics.com/Navigator?Zenith601-List
====================================
ms.matronics.com/">http://forums.matronics.com
====================================
tp://www.matronics.com/contribution">http://www.matronics.com/contribution
====================================
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[quote][b]
| | - The Matronics Zenith601-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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mhubel
Joined: 05 Sep 2009
Posts: 141
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| Posted: Fri May 14, 2010 9:58 am Post subject: Alieron Trim |
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Peter,
   I have what I believe is the "new" style with the trim tab being the full width on the left side.
On 5/14/2010 12:37 PM, Afterfxllc(at)aol.com (Afterfxllc(at)aol.com) wrote: | Quote: | Do you have the old style trim tab or the new style?
Â
--
Mark Hubelbank
NorthEast Monitoring
2 Clock Tower Place
Suite 555
Maynard, MA, 01754 - USA
mhubel(at)nemon.com (mhubel(at)nemon.com)
978-443-3955 |
| | - The Matronics Zenith601-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?Zenith601-List |
|
_________________
Mark Hubelbank
N708HU
CH601XL
Jabiru 3300
Rotec TBI 40-3 carb
Sensenich ground adj prop.
240 hr TAF
Pictures at photo.hubbles.com |
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vk3eka(at)bigpond.net.au
Guest
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| Posted: Fri May 14, 2010 2:44 pm Post subject: Alieron Trim |
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Thanks Guys,
I have the full trim tab but will add a tab to it and see how it goes. I
have full authority everywhere else except full flap on finals.
Cheers
Peter
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daveaustin2(at)primus.ca
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| Posted: Fri May 14, 2010 5:11 pm Post subject: Alieron Trim |
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Adding more tab will give you more drag. Why not raise the back of the horizontal stab to give more down bias?
Dave Austin
[quote][b]
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Juan Vega Jr
Joined: 13 Jan 2009
Posts: 157
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| Posted: Sat May 15, 2010 2:41 pm Post subject: Alieron Trim |
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with full flaps the trim will max out, and you will have to pull stick back to full Flp landing speed. All 601xl are that way (if built to specs) even the factory one. Its the design. not a bad idea either given that if you are at close to stall all you have to do is let the stick go to release from the pitch.
Juan
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