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Mikado Logo Helicopters Mikado Logo Helicopters Discussion


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Old 01-28-2020, 06:34 PM   #1 (permalink)
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Default Logo 600 one way upgrade

I was told the latest version of the logo 600 has a upgraded one way bearing. Iím starting to hear the distinct sounds that my one way is gonna start to fail. If this is true can I simply upgrade my original sx and if so what parts will I need to buy?


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Old 01-29-2020, 09:59 AM   #2 (permalink)
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MIK4067


https://www.amainhobbies.com/mikado-...67/p578443?r=0

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Old 01-29-2020, 06:33 PM   #3 (permalink)
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You need the dual bearing one way housing/bearings.
And you need the lower bearing block /motor tie in piece that's loosely shaped like a triangle.

You'll not be using the circlip any longer as this design doesn't use it.

Just look at the manual.
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Old 01-30-2020, 02:28 AM   #4 (permalink)
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... and be sure to check the old shaft... if there are some marks on the shaft of the old OWB you better should replace the shaft too.
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Old 01-30-2020, 03:30 AM   #5 (permalink)
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Quote:
Originally Posted by Stevin View Post
If this is true can I simply upgrade my original sx and if so what parts will I need to buy?
Parts you will need (as far as I see it):

4876 - one way hub Logo 600/690SX
4881 - motor counterbearing / main shaft support 600/690SX
5112 - belt pulley alu/carbon Logo 600


So, maybe it's easier just to change autorotation hub (part 4067) ?

You will be able to change it 4 times for the money.
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Old 01-30-2020, 08:55 AM   #6 (permalink)
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No reason to change to aluminum pulley that I'm aware of.
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Old 01-30-2020, 09:42 AM   #7 (permalink)
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No reason to change to aluminum pulley that I'm aware of.
There is a reason to change it. Circlip at the bottom ot the main shaft don't let main shaft to go up. With double one way bearing (part 4876) you can't use circlip. Without the circlip your main rotor will try to pull up main shaft and the only thing preventing it will be plastic drive pulley (part 4059)? It won't work!

Both, 690SX and the new 600 use aluminum pulley for this reason.
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Old 01-30-2020, 10:23 AM   #8 (permalink)
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Originally Posted by STAZZ View Post
There is a reason to change it. Circlip at the bottom ot the main shaft don't let main shaft to go up. With double one way bearing (part 4876) you can't use circlip. Without the circlip your main rotor will try to pull up main shaft and the only thing preventing it will be plastic drive pulley (part 4059)? It won't work!

Both, 690SX and the new 600 use aluminum pulley for this reason.
But when you have a floating main gear by design, Mikado recomends 1mm play, the circlip is basically doing nothing.
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Old 01-30-2020, 10:47 AM   #9 (permalink)
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I think the main reason they went with an aluminum pulley on the 690 is the increased tail rotor torque could strip the pin slot in the plastic pulley.
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Old 01-30-2020, 12:57 PM   #10 (permalink)
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Quote:
Originally Posted by STAZZ View Post
There is a reason to change it. Circlip at the bottom ot the main shaft don't let main shaft to go up. With double one way bearing (part 4876) you can't use circlip. Without the circlip your main rotor will try to pull up main shaft and the only thing preventing it will be plastic drive pulley (part 4059)? It won't work!

Both, 690SX and the new 600 use aluminum pulley for this reason.
I don't think that's the only reason the 690 uses it. The pulley is slightly different to allow a taller head height to clear the boom and help with boom strikes with the longer blades.

It also uses larger tail blades so it needs to be stronger.

But probably a good point since now the pin is the only thing holding the shaft down.
And since they use it in the aluminum 600 with the different lower block maybe there is something to it. Or it could've simply be marketing. American market is hooked on bling.
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Old 01-31-2020, 02:49 AM   #11 (permalink)
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... i am i.e. using no circlip with 550/600 cf frame - as there was no room for it after upgrade to one piece heads / newest shaft below counter bearing. one of the 2 birds is using aluminium pulley, they other plastic - both since years without any trouble.

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Old 01-31-2020, 06:06 AM   #12 (permalink)
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so glad they finally upgraded this part, been troublesome for years and Mikado seams reluctant to admit it. If your putting around yeah no big deal but once you start flying 3d and abrupt stops it seams to fail relatively quick.
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Old 01-31-2020, 11:10 AM   #13 (permalink)
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Quote:
Originally Posted by Stevin View Post
so glad they finally upgraded this part, been troublesome for years and Mikado seams reluctant to admit it. If your putting around yeah no big deal but once you start flying 3d and abrupt stops it seams to fail relatively quick.
I blew through 2 one ways on the Logo 480 xx. Not even 3d. Not even crazy headpseed. And I used new shafts each time!

2 thing Mikado is clueless on making well: swashes and one ways.
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