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Mending my cracked (fiberglass) spinner

Posted By:
Ben Cook
Young Eagles Pilot or Volunteer
9
Posts
1
#1 Posted: 4/18/2010 22:07:37

Here are a couple of pics from my spinner today.  Looks like stress cracks on the corners of the fiberglass.  How can i keep these from getting worse?  Can I lay another layer of fiber on the inside or will that throw off the balance?

 

Thanks!

Ben


fiber1.jpg

fiber2.jpg


fiber2.jpg



Ben Cook
Young Eagles Pilot or Volunteer
9
Posts
1
#2 Posted: 4/27/2010 13:04:54

REALLY?  Noone has any idea what do do about this crack?  If it's critical, etc? 

 

How about a "please"?  Can someone "Please" help me?



Kyle Riggen
Homebuilder or Craftsman
2
Posts
0
#3 Posted: 4/27/2010 14:21:08

how is the spinner attached to the backing plate?  How many screws?  Does it have a front support plate?

 

Yes it can be dangerous, the spinner could come flying off during flight.

 

 



Ben Cook
Young Eagles Pilot or Volunteer
9
Posts
1
#4 Posted: 4/27/2010 15:40:35

The spinner has 8 screws attaching it to the backing plate, no front support.  The crack is about 1" from the edge of the cutout for the prop.  There are separate screws for holding the pieces under the prop. 

 

Thanks!



Kyle Riggen
Homebuilder or Craftsman
2
Posts
0
#5 Posted: 4/27/2010 15:51:44

there is two options:

 

1)  fashion a front support for the spinner, this will take the concentrated loads off the base of the spinner where your cracking.  Fix this cracks with some epoxy.

2)  Because the cracking is occurring in the same two spots on both sides of the spinner, you can lay some more fiberglass in this area with a wide are being covered at the base and narrowing toward the top of the hole for the spinner.

 

my personal opinion, i would go with number 1)



Ben Cook
Young Eagles Pilot or Volunteer
9
Posts
1
#6 Posted: 4/27/2010 16:03:57

Thanks for the feedback.  I think I can handle #2 on my own, but if #1 would be better, I can try that route.  I didn't build the airplane though, so I'm not even a novice builder.  I do fly it to work everyday, so I need to get the fix done asap.

 

Is there anywhere I can look at an example of putting a front support in?  (steps, how-to, etc)



Joanne Palmer
Young Eagles Pilot or VolunteerHomebuilder or Craftsman
276
Posts
68
#7 Posted: 4/27/2010 18:09:25

Rather than even messing with it, Aircraft Spruce sell fiberglass spinners from UHS.  Most are less than $250.00.  For the amount of time and effort involved it probably isn't worth repairing.  Also if the balance is off slightly from the repair it may cause other areas to fail...  Spinner repairs are not authorized for some model of airplanes and spinners because they tend to fail. 

See

http://www.aircraftspruce.com/catalog/appages/uhs.php

for the fiberglass spinners they sell.

Steve Bartus
Homebuilder or Craftsman
3
Posts
0
#8 Posted: 4/29/2010 23:23:09

 You might want to ask yourself why both sides are breaking in the first place, and in the same place. It looks like it's hitting the prop? in the first pic. The second pic looks like a bad fit. Something is causing the problem. Find it!!!