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10-28-2015, 12:01 PM
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Join Date: Aug 2009
Location: Lexington, KY
Posts: 454
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Flap tube travel distance
Anyone knows the distance travelled by the flap tube as it comes out of the flap motor assembly? That is from fully retracted flaps to fully extended flaps (ie flaps connected) . Reason for question is I'm planning the installation of the POS 12 flap position sensor which has limited travel.
Thanks.
Johan
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Dorfie
RV10 Flying, N245JM
2020 dues paid with a smile
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10-28-2015, 02:49 PM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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I think the spot is only about a half inch above the cross tube.
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10-29-2015, 02:54 AM
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Join Date: Feb 2007
Location: Mpumalanga, South Africa
Posts: 1,065
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The linear movement of the flap motor is too great. You need to take it off the flap tube.
Some attach to the actuator arm outside the fuselage, others fit a bracket to the tube inside the tunnel. Either way, you need to make sure that the geometry is such that you do not hit the stops on the sensor. You want to use as much movement as possible for best resolution - maybe about 90%.
Mine was a bit trial and error. I also found that a small model aircraft turnbuckle worked well for adjustment.
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Paul
Mercy Air, White River FAWV
RV-10 ZU-IIZ - "Zeus"
Building Bearhawk Bravo - RV-18 not available
2019 Donation Made
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10-29-2015, 06:00 AM
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Join Date: Jun 2006
Location: Delaware, OH (KDLZ)
Posts: 4,196
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Quote:
Originally Posted by paul330
The linear movement of the flap motor is too great. You need to take it off the flap tube.
Some attach to the actuator arm outside the fuselage, others fit a bracket to the tube inside the tunnel. Either way, you need to make sure that the geometry is such that you do not hit the stops on the sensor. You want to use as much movement as possible for best resolution - maybe about 90%.
Mine was a bit trial and error. I also found that a small model aircraft turnbuckle worked well for adjustment.
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Photos please.
In mine case, I've spent quite a bit of time with trial and error. Where mine is at currently, is acceptable, but not perfect. I would like to shoot for perfect and get the whole travel distance handled within the POS-12 limits.
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10-29-2015, 08:05 AM
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Join Date: Sep 2009
Location: St. Louis, MO
Posts: 1,788
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Bill Peyton
RV-10 - 1125 hrs
N37CP
First Flight Oct 2012
Aviation Partners, LLC
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10-29-2015, 06:22 PM
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Join Date: Aug 2009
Location: Lexington, KY
Posts: 454
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Quote:
Originally Posted by Bill.Peyton
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Bill,
How is the pin and nut attached to the angle plate? I understand the nut part, how is it held in place at the plate?
Thanks.
Johan
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Dorfie
RV10 Flying, N245JM
2020 dues paid with a smile
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10-30-2015, 06:35 AM
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Join Date: Sep 2009
Location: St. Louis, MO
Posts: 1,788
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I used a small hex head screw. Purchased everything at the hobby shop
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Bill Peyton
RV-10 - 1125 hrs
N37CP
First Flight Oct 2012
Aviation Partners, LLC
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10-30-2015, 01:19 PM
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Join Date: Dec 2011
Location: Livermore, CA
Posts: 6,797
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My sensor is mounted to a hinge on the bulkhead behind the left-right running torque tube, and attached to the torque tube with an Adel clamp. If you think about it you can arrange the geometry so the first 3 deg of (flap) motion translates to a relatively large linear movement of the sensor. This makes it easier to set up on the display to show that 'first notch'.
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11-01-2015, 11:52 AM
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Join Date: Dec 2007
Location: Coeur d'Alene, ID
Posts: 163
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pictures??
Quote:
Originally Posted by BobTurner
My sensor is mounted to a hinge on the bulkhead behind the left-right running torque tube, and attached to the torque tube with an Adel clamp. If you think about it you can arrange the geometry so the first 3 deg of (flap) motion translates to a relatively large linear movement of the sensor. This makes it easier to set up on the display to show that 'first notch'.
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Bob do you have any photos of this? I'm trying to envision how you go from an adel clamp that is perpendicular to the POS12 arm? Did you fabricate a small bracket out of aluminum angle maybe?
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Ben Westfall
RV-10 (phase 1 flight testing)
Coeur d'Alene, ID
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11-01-2015, 06:14 PM
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Join Date: Jun 2010
Location: Sunman, IN
Posts: 2,189
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I have seen that picture but can't find it. The Adel clamp fits around the torque tube and a small angle bracket gets bolted to the Adel. The pushrod is then bolted to the angle.
Wish I could find that picture!
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Bob
Aerospace Engineer '88
RV-10
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