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  #1  
Old 09-17-2023, 09:22 AM
RayMc RayMc is offline
 
Join Date: Aug 2021
Location: Roseville, CA
Posts: 51
Default Loose canopy latch, problem solved.

I completed my 12 a few months back and have been bugged by the loose latch handle partially latching when I close the canopy necessitating climbing on the wing just to raise the canopy.
I had a few o-rings in the spare parts bin and found one that fit under the handle and gave a little tension to the shaft but in a couple weeks it wore to the point that it did no good.

A couple weeks weeks ago I glued a tiny rare earth magnet to the latch stop and now when the latch is opened it sticks to the magnet... problem solved!
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  #2  
Old 09-17-2023, 10:43 AM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
Posts: 10,339
Default

Good solution after the factÖ
The KAI does address this with instructions on adding friction to the handle rotation so it will not change position on its own.
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  #3  
Old 09-17-2023, 01:21 PM
RayMc RayMc is offline
 
Join Date: Aug 2021
Location: Roseville, CA
Posts: 51
Default

For about the first dozen or so times I was in and out of the cockpit the canopy latch had sufficient friction to remain where it was left... until it didn't!

I don't recall seeing that in the KAI.
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  #4  
Old 09-17-2023, 03:13 PM
Piper J3's Avatar
Piper J3 Piper J3 is online now
 
Join Date: Nov 2014
Location: Hinckley, Ohio
Posts: 2,987
Default

I think the KIA tells you to slightly collapse the tube diameter so it impinges on the shaft to prevent free rotation....

I use a small magnet that works a charm......
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  #5  
Old 09-17-2023, 03:14 PM
Bob Y Bob Y is offline
 
Join Date: Jul 2017
Location: Piedmont, SC
Posts: 556
Default

See page 12 of KAI Section 39. And I too started with rubber washers because I was afraid of over crimping the tube.
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  #6  
Old 09-17-2023, 03:55 PM
Fisherpd Fisherpd is offline
 
Join Date: Oct 2020
Location: Sun CIty West, AZ
Posts: 30
Default Careful of the Magnetomer

If you have Dynon avionics, remember that the ADAHRS with the magnetometer is located about 3 ft aft of that location. Check the compass accuracy after installing the magnet.
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  #7  
Old 09-17-2023, 05:20 PM
thiggins thiggins is offline
 
Join Date: Mar 2020
Location: Saluda,NC
Posts: 235
Default

Quote:
Originally Posted by RayMc View Post
I completed my 12 a few months back and have been bugged by the loose latch handle partially latching when I close the canopy necessitating climbing on the wing just to raise the canopy.
I had a few o-rings in the spare parts bin and found one that fit under the handle and gave a little tension to the shaft but in a couple weeks it wore to the point that it did no good.

A couple weeks weeks ago I glued a tiny rare earth magnet to the latch stop and now when the latch is opened it sticks to the magnet... problem solved!
Iím a little concerned about confusing the magnetometer with those magnets.
Anyone else share this concern?

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  #8  
Old 09-17-2023, 07:26 PM
RayMc RayMc is offline
 
Join Date: Aug 2021
Location: Roseville, CA
Posts: 51
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thiggins,

Interesting thought, I have not noticed any anomalies in navigating to several different airports since installing the magnet. Next time I'm at the airport I'll go for a ride on the fields compass rose and see if there's any change from the initial check.
I suppose if there is a problem I can change to my alternate idea and use velcro tape with hooks on one piece and loops on the other.
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  #9  
Old 09-18-2023, 10:36 AM
subpar_bucker subpar_bucker is offline
 
Join Date: Oct 2016
Location: Cranberry Twp, PA
Posts: 85
Default

I had already painted my canopy frame when I realized I had this issue. I mentioned it to a friend and he suggested inserting a piece of fishing line vertically inside the tube (between the fixed portion that's part of the frame and the rotating portion that you turn). This increased the friction enough to solve this problem for me.

I was worried that squeezing the tube was going to scratch the paint, hence this alternative approach.
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  #10  
Old 09-18-2023, 08:25 PM
12vaitor 12vaitor is offline
 
Join Date: Aug 2012
Location: Panama City, FL
Posts: 272
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Quote:
Originally Posted by thiggins View Post
Iím a little concerned about confusing the magnetometer with those magnets.
Anyone else share this concern?

I made a similar modification a few years ago and have not noticed any effect on the Dynon heading. The ground and inflight compass cal was done with the magnets in place. I epoxied mine to the frame however it was not long before the epoxy failed. I ended up mechanically attaching the magnets and have had no issues for the past five years.

John Salak
RV-12 N896HS
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