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Old 03-02-2018, 01:14 PM   #1 (permalink)
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Default Logo 700 Autorotation gear issue

Hi guys

I just bought my first Logo 700 and assemble the kit and do all the setup .. when I was going to do maiden flight all was ok second flight tail was spinning I do auto landing and found the autorotation gear was broken by the pin (the lock to main shaft) I remember when I build it I use 1mm and .3mm shims (washer) as in the manual and there was little clearance between main gear and autorotation gear can u help me with these guys ?
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Old 03-02-2018, 05:22 PM   #2 (permalink)
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Could you show us a picture of the broken auto rotation gear?
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Old 03-03-2018, 12:20 AM   #3 (permalink)
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unfortunately I thought the gear put its broken from the pin place .... the thing is that when I follow the manual not enough distance still main gear not close to autorotation
gear thats way it get the pin out ... do u guys use extra shims from bottom bearing ?
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Old 03-03-2018, 08:47 AM   #4 (permalink)
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Would be helpful if you can post a picture.
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Old 03-04-2018, 02:24 AM   #5 (permalink)
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I had same thing happen to me and never did find out how or why
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Old 03-06-2018, 05:52 PM   #6 (permalink)
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This can happen when you don't properly tighten down your main shaft clamp ring.

If the ring is not tight enough on the shaft, vertical play in the main shaft becomes excessive over time, which may allow the pin to back out of the pulley, which can result in the pin breaking free from the pulley.
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Old 12-12-2018, 12:43 AM   #7 (permalink)
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I've never had any problem with this pulley on the xxtreme or the Logo700. But I think I broke a few on Logo 600 before changing it for the metal one.
Anyway, I just received the Lynx main pulley and lit looks pretty good.
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Old 02-25-2019, 03:47 PM   #8 (permalink)
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Ive just had mine go after over 120 flights. No play on the main shaft at all. Have just ordered the Lynx one now with the metal centre as it would be good to avoid this happening again. Are there any other instances of this happening?
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Old 02-27-2019, 12:36 PM   #9 (permalink)
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So here is the damage to the main pulley wheel, the retaining pin has properly malkied the wheel. Is this a regular occurrence? Given that Lynx makes a gear with a metal insert for the pin I'm guessing it is. This nearly caused a major crash as the tail completely let go due to this. Luckily I wasn't high and I managed to hit throttle hold in time and thus kill all the energy. Only damage was some nicks to the rather gorgeous canopy. I could put a grumpy face up at this stage but Im just happy that damage was effectively nil. Lucky man!
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Old 02-27-2019, 01:36 PM   #10 (permalink)
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I just crashed because of this too, the gear had ~100 flights on it.
In hindsight, i have noticed a bit of play in the mainshaft but never thought about it. I think the collar on the main shaft developed a bit of play
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Old 08-05-2019, 12:08 AM   #11 (permalink)
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I also damaged the drive pulley.
But these are rather the consequences of a hard landing, due to my own negligence. I installed a new Lynx pulley.
But I am sure that the original part is a better choice, it protects the bevel gear of the drive from destruction.
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