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klondike(at)megalink.net
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 Posted: Sun May 16, 2010 2:32 pm Post subject: Zenith-List: Alieron Trim/ flap travel |
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At a later date, wasn't the flap actuator travel changed from 4" to 2" ? To restrict the flap travel?
[quote] ---
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craig(at)craigandjean.com
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| Posted: Sun May 16, 2010 2:54 pm Post subject: Zenith-List: Alieron Trim/ flap travel |
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At least with my 2000 vintage plans and kit the factory actuator traveled a bit under 2 inches. This was the actuator with the exposed microswitches.
-- Craig
From: owner-zenith601-list-server(at)matronics.com [mailto:owner-zenith601-list-server(at)matronics.com] On Behalf Of fritz
Sent: Monday, May 17, 2010 3:22 PM
To: zenith601-list(at)matronics.com
Subject: Re: Zenith-List: Alieron Trim/ flap travel
At a later date, wasn't the flap actuator travel changed from 4" to 2" ? To restrict the flap travel?
[quote] ---
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afterfxllc(at)aol.com
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| Posted: Sun May 16, 2010 3:04 pm Post subject: Zenith-List: Alieron Trim/ flap travel |
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Yes the new style actuator has less travel and my test pilot had the same concern about lack of elevator trim with full flaps but with half flaps and keeping his speed up it works fine. Full flaps isn't necessary. He said what was strange was it stalled right at 38 to 40 but wouldn't dare do that on a landing.
Jeff
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craig(at)craigandjean.com
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| Posted: Sun May 16, 2010 3:38 pm Post subject: Zenith-List: Alieron Trim/ flap travel |
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Really? I've had both the old one with the exposed micro-switches and the new sealed one (circa Nov. 2008) and measured the travel of both. Unless you crack open the sealed unit you can't adjust the travel. From the factory the travel of mine was 2 and 1/8th inches or 54mm. The plans page for new style actuator here (dated 11/06) show a travel of 50 mm:
http://www.zenithair.com/zodiac/xl/data/6b19.pdf
For the old actuator the rough settings shown for the micro switches show in 6-B-19 (dated 08/05) give about 2 inches of travel (63mm - 12mm = 51 mm or about 2 inches) but this adjustment is refined for 30 degree travel as specified on 6-S-3.
For both the old and new plans the center-to-center length of the arm that connects the actuator to the flap torque tube (6B19-3) is listed as 170 mm. And the arm that drives the flap (at least on the right, 6B19-1) has a center-to-center distance of 105 mm for the old and new design. So if the actuators travel the same distance and the arms are the same length then how did the angle swept change? Or has there been a third design?
-- Craig
From: owner-zenith601-list-server(at)matronics.com [mailto:owner-zenith601-list-server(at)matronics.com] On Behalf Of afterfxllc(at)aol.com
Sent: Sunday, May 16, 2010 4:04 PM
To: zenith601-list(at)matronics.com
Subject: Re: Zenith-List: Alieron Trim/ flap travel
Yes the new style actuator has less travel and my test pilot had the same concern about lack of elevator trim with full flaps but with half flaps and keeping his speed up it works fine. Full flaps isn't necessary. He said what was strange was it stalled right at 38 to 40 but wouldn't dare do that on a landing.
Jeff
-----Original Message-----
From: Craig Payne <craig(at)craigandjean.com>
To: zenith601-list(at)matronics.com
Sent: Sun, May 16, 2010 6:54 pm
Subject: RE: Zenith-List: Alieron Trim/ flap travel
At least with my 2000 vintage plans and kit the factory actuator traveled a bit under 2 inches. This was the actuator with the exposed microswitches.
-- Craig
From: owner-zenith601-list-server(at)matronics.com (owner-zenith601-list-server(at)matronics.com) [mailto:owner-zenith601-list-server(at)matronics.com ([email]owner-zenith601-list-server(at)matronics.com?[/email])] On Behalf Of fritz
Sent: Monday, May 17, 2010 3:22 PM
To: zenith601-list(at)matronics.com (zenith601-list(at)matronics.com)
Subject: Re: Zenith-List: Alieron Trim/ flap travel
At a later date, wasn't the flap actuator travel changed from 4" to 2" ? To restrict the flap travel?
[quote] ---
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afterfxllc(at)aol.com
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| Posted: Sun May 16, 2010 3:57 pm Post subject: Zenith-List: Alieron Trim/ flap travel |
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I've got both styles on working aircraft and I will go measure the travel on both but it just seems to me the new unit has less but I will confirm this tomorrow. You may be in fact correct.
Jeff
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Ron Lendon
Joined: 10 Jan 2006
Posts: 685
Location: Clinton Twp., MI
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| Posted: Sun May 16, 2010 6:50 pm Post subject: Re: Zenith-List: Alieron Trim/ flap travel |
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Jeff,
Measure the angle of deflection at the flap. That's what we should be looking at anyway, the actual movement of the control surface.
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_________________
Ron Lendon
WW Corvair with Roy's Garage 5th bearing
CH 601 XLB
N601LT - Flying
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
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