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Cracked lower cowl attach bracket

russe

Member
Anyone seen a problem like this before?

I found the problem during maintenance for an unrelated issue. I guess I got lucky.

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Russ
 
Mine too. Consider building a bracket that has the vertical support aligned with the nose gear fairing, instead of offset by 3/4". I would post photos, but well, that just isn't working out for me anymore.
 
I've seen this in a friend's RV10. I reinforced mine from the get go because of that.
I'm theorizing that the hinges at the bottom allows for more movement and might be contributing to the problem. I know many builders, myself included, installed screws to attach the bottom of the cowl to the fuselage.
Any of the broken one's from bottom cowls attached with screws?
Johan
 
Whilst I was doing the build, I realized that his part was simply not going to be up to the job. I made a simple mod by doubling up with a mirror image - turning it from a "C" to an "H".
 
I have three dzus fasteners each side on the bottom cowl and it cracked at about 150 hrs. Made a new one from slightly thicker material and made the top longer to take two fasteners. One as per plan and one about one inch back with a rivnut into the belly skin. Ok up to now at about 430 hrs :)
 
I used screws and my bracket is intact after 6 years on a rough field. Didn't look like it would last.

I've seen this in a friend's RV10. I reinforced mine from the get go because of that.
I'm theorizing that the hinges at the bottom allows for more movement and might be contributing to the problem. I know many builders, myself included, installed screws to attach the bottom of the cowl to the fuselage.
Any of the broken one's from bottom cowls attached with screws?
Johan
 
1000 hrs ok

Mine is fine after 1000 hrs. I've got 1/4 turn fasteners on the bottom cowl. They're also powder coated.
 
We had ours crack a long time ago. Doubled it up and re-riveted it up. Now at 1310/1500 Tach/hobbs and still OK on the repair.

Guessing the OEM part cracked at 500-700 hours.....cant remember.
 
Thankful for this forum! Working on cowl now. Thought the bracket looked pretty "flimsy", so found this thread. Decided to "roll my own" based on experience of those that had this piece crack. Made it out of .063 sheet and angle.


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Mine's original at 1265 hours.

I have screws for the bottom cowl, not hinges.

Ditto on the screws for the lower attach of the cowl. Hinges there would allow much more vibration to effect the center bracket. They would also allow more movement over time (the hinges), because they would wear due to the vibration they endure.
 
Ditto on the screws for the lower attach of the cowl. Hinges there would allow much more vibration to effect the center bracket. They would also allow more movement over time (the hinges), because they would wear due to the vibration they endure.

I used three quarter turn cam-locks on each side on my RV-10 here. I also fabricated a removable snorkel that attached to the bottom cowl and the F-10108A assembly. That modification made cowl removal/installation a snap that one person could handle easily.
 
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