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- Flap Trim - ELev trim tab which size?

 
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taffy0687(at)yahoo.com
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PostPosted: Fri May 12, 2006 12:46 pm    Post subject: - Flap Trim - ELev trim tab which size? Reply with quote
All--
Tony is correct--- I talked to Nick at Zenith (several months ago) when I had to decide which size tab to put on my XL---My plans showed the small tab, and the updates showed the larger tab------ Nick told me that, " the smaller size tab was a transition from the HD model which did not have flaps-------- With flap use on the XL the smaller tab is not big enough to get rid of all the stick pressure, therefore the bigger tab was introduced."
My decision was: I built the smaller tab, as (1) I prefer some back pressure in the landing configuration and (2) the trim wouldn't be so sensitive in the cruise mode.
Fritz

"T. Graziano" <tonyplane(at)bellsouth.net> wrote:


Jack,
I have the same problem with my XL relative to running out of elevator trim
with flaps. In flight, I use very little trim and most of the time my trim
setting is pretty close to neutral so I do not want to change the incidence
of my horiz stab.. I automatically trim full nose up as I lower flaps and
still have to hold back pressure. I believe the solution is to go to a full
span trim tab as per the latest Zodiac dwgs.
Tony Graziano
N493TG; 93 hrs

Quote:
Time: 11:13:52 AM PST US
From: Jack Russell
Subject: Best landing of my life!



Ok, maybe not but today I took 8830C up for its second,third and fourth
flight

Quote:
and it flew nice and the landings were great. The CHt issue is much better
with

Quote:
the hottest being #4 now at about 350. On the first flight # 6 was almost
400

Quote:
and a little baffle on the back has now made it the coldest. We did about
5

Quote:
mods to the cowling to get the warning light to stop, Jabiru Jim at
Chandler airport

Quote:
has been great.
I do have the problem with not having enough up trim with flaps. With
only 10deg

Quote:
of flaps I have to have full up trim. I remember some of you others
having

Quote:
this problem. I will check the archives for the fix.
Thanks guys.

Jack Russell -Clovis CA
601 XL Jabiru 3300
Progress update at:
http://www.geocities.com/clojan(at)sbcglobal.net/zodiacbarn.html



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craig(at)craigandjean.com
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PostPosted: Fri May 12, 2006 1:19 pm    Post subject: - Flap Trim - ELev trim tab which size? Reply with quote
My (uninstalled) trim tab fits between the two riblets and is about 530 mm
wide. It is shown in 6-ATO-1 dated 2/04. Is this the older, narrower design
or the newer, wider one? If the narrower one, how does a wider tab fit
around the riblets?

-- Craig

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taffy0687(at)yahoo.com
Guest
PostPosted: Fri May 12, 2006 2:15 pm    Post subject: - Flap Trim - ELev trim tab which size? Reply with quote
My elevator was completely skinned, than I cutout and installed the trim tab afterwards. I used plans dated 02/03 page 6-T-6. the cut out calls for 417mm (between inbd and center ribs.-------- my finished and installed tab is 410mm.
Using updated plans 08/05) calls for a cutout of 900mm and a tab length of 895mm------ the aft (cutout area) of the center rib would have to be cut also if built to the old plans and installing the (new) larger tab. The new tab drawing is shown on the Zenith builders site updates.
Fritz


Craig Payne <craig(at)craigandjean.com> wrote:


My (uninstalled) trim tab fits between the two riblets and is about 530 mm
wide. It is shown in 6-ATO-1 dated 2/04. Is this the older, narrower design
or the newer, wider one? If the narrower one, how does a wider tab fit
around the riblets?

-- Craig


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craig(at)craigandjean.com
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PostPosted: Fri May 12, 2006 2:35 pm    Post subject: - Flap Trim - ELev trim tab which size? Reply with quote
I see a list of Acrobat files which describe changes to the plans at:

http://www.zenithair.com/zodiac/xl/xl-up-drawings.html

Are you saying the actual updated drawing are on the web site? If so where?

-- Craig

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tomandbren2003(at)yahoo.c
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PostPosted: Fri May 12, 2006 3:12 pm    Post subject: - Flap Trim - ELev trim tab which size? Reply with quote
They can be found in the builder's area: http://www.zenithair.com/zodiac/xl/xl-up-drawings.html

If you are still unable to locate them, email me and I'll send it to you. The trim tab is very easy to add, even if your elevator is already skinned.
Craig Payne <craig(at)craigandjean.com> wrote:

I see a list of Acrobat files which describe changes to the plans at:

http://www.zenithair.com/zodiac/xl/xl-up-drawings.html

Are you saying the actual updated drawing are on the web site? If so where?

-- Craig

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