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  #31  
Old 04-29-2017, 04:21 AM
N661DJ N661DJ is offline
 
Join Date: Feb 2006
Location: Winter Haven
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Bruce,
Received the mirrors, thanks, Will send a $ donation to DR.
Dick
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  #32  
Old 04-29-2017, 04:29 AM
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Saville Saville is offline
 
Join Date: May 2014
Location: KBVY Massachusetts
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Bruce,

Received my mirror blanks and PVC yesterday. Beautiful..thanks very much.

Other people have a good idea..since you don't want money I'll add to my yearly dues to DR.

I'm going to try and work out a drawing of the pvc placement based upon the article and post it here.

Thanks!
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  #33  
Old 04-29-2017, 09:14 AM
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BruceEicher BruceEicher is offline
 
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Sounds good! You are all welcome!

Another thought; after glueing up and fitting it to the bar, I trimmed the PVC clip opening some more on one side or the other to adjust the tilt movement.
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  #34  
Old 05-29-2017, 08:17 AM
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Saville Saville is offline
 
Join Date: May 2014
Location: KBVY Massachusetts
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I've been trying to make the canopy bow mirrors a la Bruce's technique and I keep running into failures.

The basic problem can be seen here:



Using the silicone adhesive to glue the PVC semi-circle to the back of the mirror as recommended, the connection fails. The problem is with the strength of the bond of the reflective layer to the acrylic - it's weak. You can see that the reflective stuff adheres to the PVC/silicone.

I need this bond to be very strong as I fly acro and I can't have the mirror falling off.

I'm trying to come up with alternatives. The only successful one so far can be seen here:



I took a piece of scrap PVC and cut it to the shape of the mirror but left 1/2" tabs on the PVC. I then hit them with a heat gun and bent them over the mirror, clamped them lightly, and let them cool and set. I then cut them back so that they don't cover so much of the mirror.

They grip the mirror quite well.

So failing other possibilities I will use this technique to mount the mirror to a PVC backing plate holder the exact size and shape of the mirror. Then I'll use PVC cement to glue the semi-circle to the back of the backing plate. That will be strong enough. I think the mirror curvature is a circle but I'll verify that. if it is then sliding replacement mirrors in and out will be possible.

I tried gluing some vinyl wire cove to the scrap PVC but that failed - PVC glue didn't grip the vinyl. I'm thinking of trying some automobile door edge guard made from PVC - gluing that to the edge of the PVC backing plate along the top and bottom edge. That would be a better looking solution *IF* the PVC cement actually glues them together.

More later.
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  #35  
Old 05-29-2017, 10:37 AM
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BruceEicher BruceEicher is offline
 
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Hi Gregg, Mine has failed just a while ago when I slammed it in the canopy. But I used a lot more silicone glue giving more surface bond to the mirror back. The De- bonding in my case was at the pipe clip so I just re-glued.
Aerobatics have not been a problem for me but Understand the concern

Do you need more mirror?
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  #36  
Old 05-29-2017, 03:30 PM
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Saville Saville is offline
 
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Quote:
Originally Posted by BruceEicher View Post
Hi Gregg, Mine has failed just a while ago when I slammed it in the canopy. But I used a lot more silicone glue giving more surface bond to the mirror back. The De- bonding in my case was at the pipe clip so I just re-glued.
Aerobatics have not been a problem for me but Understand the concern

Do you need more mirror?
Hi Bruce,

No don't need more mirror. I bought a 12"x12" sheet of acrylic mirror from Amazon and I have the second blank you gave me.
So I'm good to go on that score. I just need to find a good holder solution

Thanks!
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Last edited by Saville : 05-30-2017 at 06:29 AM.
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  #37  
Old 05-29-2017, 09:14 PM
Go Guy Go Guy is offline
 
Join Date: Sep 2009
Location: Jenks, Ok.
Posts: 33
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I made mine but used a bigger glob of RTV and wrapped it to the top edge. I do minor Acro (just positive G stuff). So far no problems like you have had. Maybe if u used two clips it would hold better for your situation

I was concerned it would vibrate, but that hasn't been the case.

Rod
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  #38  
Old 05-30-2017, 03:15 PM
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GatorJim GatorJim is offline
 
Join Date: Sep 2012
Location: Orlando, FL
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Shoe Goo.

Get it at Walmart. Won't let go.
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  #39  
Old 05-30-2017, 03:36 PM
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Saville Saville is offline
 
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Quote:
Originally Posted by GatorJim View Post
Shoe Goo.

Get it at Walmart. Won't let go.
In my case it's not the glue that is failing but the bonding of the shiny layer to the acrylic.
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  #40  
Old 05-30-2017, 08:49 PM
sf3543 sf3543 is offline
 
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To get a better bond, just bond something to the back of the mirror that is the size of the entire mirror, then bond it to the pvc and It will hold better. Doing this you are contacting a much larger portion of the mirror back and it should hold. You could use some thin aluminum, or maybe some plastic sheet, etc.
Worth a try.
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