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OK it was not that bad, maybe just some maintenance malpractice. Like half of the Loading Prop flying 30 yards away
But as I have never even spooled one of these type engines up before I guess it was a successful engine turn.
Lessons learned:
1) Even if you do tighten the prop nut and use Locktite, it can still come loose. (What is the proper torque for this?, I use a German toque method, Good-and-tight
2) Did you put a mufflers exhaust deflector on, and you are not going flying, did you zip tie it anyway?
3) Ensure the area is clear as broken props can fly away. (I did ensure a clear area prior to the engine turn.)
4) Even if you are not flying, did you Locktite all the engines mounting hardware.
The Engine Turn:
All was good as I started out breaking in my new OS 50SX-H engine, it started right up after a little priming. After running out the first tank I shut it down to refuel and to verify all was secure and good to go. To my surprise the prop nut had come loose. No problem, I added some Locktite tightened it up, and moved on. All was well once again, all kinds of fuel spitting out
as I was running very rich. Then I notice two of the engine mounting bolts were loose, I shut it down again to add Locktite and to tighten them back up. Nothing else loose, OK I am ready to continue, she is running better, I guess that is because it is starting to break in, hey what is that, the exhaust deflector is starting to come loose I had better shut it down, ahhhh to late, the deflector vibrated off (at throttle) as I was reaching to shut the engine down, and the exhaust deflector decided to reach out and touch the spinning prop. The impact between the spinning prop/deflector caused the prop to break in half. One half stayed on the engine the other half came to rest about 30 yards away. So I re-checked everything, put on new prop continue with turns, no further problems. I have submitted a few pics of my engine test stand that I manufactured
thanks to the assistance of Mo. The test stand is combination of wood/aluminum and plastic. I have done only one modification to the original design. I moved the remote glow plug adaptor aft about 6 inches. The original placement was good, but to increase safety, moving it was a good idea. (the prop spins rather fast and I think in a contest of my fingers and the prop, I think my fingers would loose.)
Just thought I would share my first engine turn.
Fly safe
Mac
OK it was not that bad, maybe just some maintenance malpractice. Like half of the Loading Prop flying 30 yards away
But as I have never even spooled one of these type engines up before I guess it was a successful engine turn.
Lessons learned:
1) Even if you do tighten the prop nut and use Locktite, it can still come loose. (What is the proper torque for this?, I use a German toque method, Good-and-tight
2) Did you put a mufflers exhaust deflector on, and you are not going flying, did you zip tie it anyway?
3) Ensure the area is clear as broken props can fly away. (I did ensure a clear area prior to the engine turn.)
4) Even if you are not flying, did you Locktite all the engines mounting hardware.
The Engine Turn:
All was good as I started out breaking in my new OS 50SX-H engine, it started right up after a little priming. After running out the first tank I shut it down to refuel and to verify all was secure and good to go. To my surprise the prop nut had come loose. No problem, I added some Locktite tightened it up, and moved on. All was well once again, all kinds of fuel spitting out
as I was running very rich. Then I notice two of the engine mounting bolts were loose, I shut it down again to add Locktite and to tighten them back up. Nothing else loose, OK I am ready to continue, she is running better, I guess that is because it is starting to break in, hey what is that, the exhaust deflector is starting to come loose I had better shut it down, ahhhh to late, the deflector vibrated off (at throttle) as I was reaching to shut the engine down, and the exhaust deflector decided to reach out and touch the spinning prop. The impact between the spinning prop/deflector caused the prop to break in half. One half stayed on the engine the other half came to rest about 30 yards away. So I re-checked everything, put on new prop continue with turns, no further problems. I have submitted a few pics of my engine test stand that I manufactured
thanks to the assistance of Mo. The test stand is combination of wood/aluminum and plastic. I have done only one modification to the original design. I moved the remote glow plug adaptor aft about 6 inches. The original placement was good, but to increase safety, moving it was a good idea. (the prop spins rather fast and I think in a contest of my fingers and the prop, I think my fingers would loose.)
Just thought I would share my first engine turn.
Fly safe
Mac
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