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  #1  
Old 10-28-2015, 12:01 PM
Dorfie Dorfie is offline
 
Join Date: Aug 2009
Location: Lexington, KY
Posts: 454
Default 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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  #2  
Old 10-28-2015, 02:49 PM
aerhed aerhed is offline
 
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Location: Big Sandy, WY
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I think the spot is only about a half inch above the cross tube.
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  #3  
Old 10-29-2015, 02:54 AM
paul330 paul330 is offline
 
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Location: Mpumalanga, South Africa
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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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  #4  
Old 10-29-2015, 06:00 AM
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rleffler rleffler is offline
 
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Location: Delaware, OH (KDLZ)
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Quote:
Originally Posted by paul330 View Post
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.
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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  #5  
Old 10-29-2015, 08:05 AM
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Bill.Peyton Bill.Peyton is offline
 
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Here are some photos of what I did..
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  #6  
Old 10-29-2015, 06:22 PM
Dorfie Dorfie is offline
 
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Location: Lexington, KY
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Quote:
Originally Posted by Bill.Peyton View Post
Here are some photos of what I did..
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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  #7  
Old 10-30-2015, 06:35 AM
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Bill.Peyton Bill.Peyton is offline
 
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I used a small hex head screw. Purchased everything at the hobby shop
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  #8  
Old 10-30-2015, 01:19 PM
BobTurner BobTurner is offline
 
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Location: Livermore, CA
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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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  #9  
Old 11-01-2015, 11:52 AM
bwestfall bwestfall is offline
 
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Location: Coeur d'Alene, ID
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Default pictures??

Quote:
Originally Posted by BobTurner View Post
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'.
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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  #10  
Old 11-01-2015, 06:14 PM
rocketman1988 rocketman1988 is offline
 
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Location: Sunman, IN
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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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