The Biplane Forum > General Discussion > Hangar Talk > Why are there holes in this propeller?



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Old 10-18-2017, 11:33 PM   #1
will moffitt
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Default Why are there holes in this propeller?

Some of you guys will probably know this right off. I found it amazing. The propeller is airworthy and whistles at an idle. It was in the movie "The Aviator" attached to the H 1. The owner said they put decals over the holes.
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Old 10-18-2017, 11:41 PM   #2
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Interrupter system failed on a military airplane?


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Old 10-18-2017, 11:54 PM   #3
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In the Army we had to make sure parts that met their service life were defaced in some way so the wouldn’t end up back in the supply system. Some people were buying timed out rotor blades and selling them in South America as serviceable. Killed some people. We ended up hacking them up with an axe. At any rate I would not think it serviceable with a hole in it...
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Old 10-18-2017, 11:59 PM   #4
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I figured some old guy would get it. Off an AT6 If I remember right. It was a weak system and they were shooting up a lot of props. The manufacture said if the hole is a certain distance from the edge radius the edges and return to service. 30 caliber. It is at the little backwoods airport I keep mentioning Concrete. The big guy is the owner, I am 5 11. Steve Bolan a stuntman. In many movies including the aviator. Bill, if you are ever out west I will give you a free tour for winning.

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Old 10-19-2017, 12:05 AM   #5
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Thanks Will, I'm honored. Don't know when I might be able to collect.....
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Old 10-19-2017, 03:15 AM   #6
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Seriously? It's ok to have a bullet hole in it? Hell if it was a Hartzel they tell you had to change that blade, the other blade, and the hub!
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Old 10-19-2017, 03:26 AM   #7
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Obviously a bullet hole but looks like it entered the front?

Looks ok to me.
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Old 10-19-2017, 03:50 AM   #8
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Quote:
Originally Posted by EAABipe40FF View Post
Obviously a bullet hole but looks like it entered the front?

Looks ok to me.
No, part of the deal was the hole had to have a radius put on it, both sides.

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Old 10-19-2017, 04:52 AM   #9
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Understood. Thanks
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Old 10-19-2017, 04:43 PM   #10
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Story time. I had a customer in Colorado Springs. Passed away now. He had a J-3 with a C-85. Story begins while hunting for coyote pelts in WY. The feds would pay you $ for each pelt brought back. The owner and hunting buddy decided to use the J-3 for there shooting platform. Being new to the Aerial sport, they had a learning curve to say the least. As they spotted a lone coyote, the front seater took aim, the coyote did a hard turn to evade and the pilot followed. The trouble is the shooter did not track as fast and ended up shooting the wood prop. It shaked really bad so they landed out in the field. Got out and noticed a single hole in one blade. Since it was to far to walk out, no radio, no comm of any sort. The shooter decided it was just best to shoot a hole in the other blade to get it balanced. It worked, they flew it out and hung the prop on the back wall of the hangar. Got to love old pilots

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Old 10-20-2017, 12:26 AM   #11
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That's what plastic wood is for
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Old 10-20-2017, 03:06 PM   #12
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Quote:
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The trouble is the shooter did not track as fast and ended up shooting the wood prop. The shooter decided it was just best to shoot a hole in the other blade to get it balanced.
Been reading a few books on Grasshopper operations during WWII. One book describes how they filled a bullet hole in a L-4 prop with a glue soaked piece of canvas and then sanded it smooth after it hardened. The plane flew with that prop from just after D-Day till the end of the war.
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Old 10-20-2017, 05:21 PM   #13
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My Dad hit the beach at Normandy. He said he saw one of those small planes land behind lines and pick up two flyers. One jumped in the back and one rode the struts.

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Old 10-20-2017, 05:46 PM   #14
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Plugging a clean hole in a laminated wood propeller is likely perfectly safe.
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Old 10-20-2017, 07:50 PM   #15
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Saw one of those blades in the late 60's on a 600 Stearman sprayer. The operator said they were legal for FAR Part 8 operations but only one blade per prop was allowed the hole??!! It did make a whistling noise at idle but sounded like a regular T-6 when operating.


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