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Mikado Logo Helicopters Mikado Logo Helicopters Discussion


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Old 06-26-2020, 04:20 AM   #1 (permalink)
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Default logo 550sx motor with 6mm shaft

I know that the standard motor for the Logo 550sx to use with the 153t main gear is the Mikado branded Scorpion with the 5mm shaft.
I was considering fitting a motor with a 6mm shaft, I have the 106t main gear from the 600, with a 12t pinion and the 6mm counter bearing.
I have a Rotorstar 4025 motor but its 1250kv and has quite a short shaft, it may work ok but it's not ideal so I was wondering what other motors with a 6mm shaft may be suitable with the correct shaft length, seems like a 1050kv-1100kv may be better.
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Old 06-26-2020, 06:56 AM   #2 (permalink)
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The Xnova 4025 works. I ran one in an older 550sx several years ago. I believe I used the A shaft and cutoff the extra. Donít forget the small shim in the counter bearing. I recall having a hard time finding that particular piece. It also needs to have a 6mm diameter.
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Old 06-26-2020, 07:34 AM   #3 (permalink)
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my 550 is running Egodrift 4025 1050, was running Pyro 650 103 before... both 6mm shaft. both 106/11 M1. best decision ever

the small shims are: 04976
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Old 06-26-2020, 07:35 AM   #4 (permalink)
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Seems that the shaft C is the correct size 32mm, guess i could consider going back to a motor with a 5mm shaft looks like the Xnova 4025-1120kv shaft C fits the bill.
I don't need tons of power as I don't really do 3d and I want a lower headspeed so also looking at if it's a light build say with smaller packs like 4000mah rather than 5000mah whether you could get away with a 4020, something like a Xnova 4020-1000kv with shaft D which is the one normally used for a Synergy 516 but it has a 5mm shaft and is 32mm long, anyone know if that would work?
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Old 06-26-2020, 07:45 AM   #5 (permalink)
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Quote:
Originally Posted by Gscott View Post
The Xnova 4025 works. I ran one in an older 550sx several years ago. I believe I used the A shaft and cutoff the extra. Don’t forget the small shim in the counter bearing. I recall having a hard time finding that particular piece. It also needs to have a 6mm diameter.
Depending on how you have your main gear shimmed, you don’t need that washer in the counter bearing.. my pinion doesn’t even touch the counter bearing. The washer just flopped around. Took it out. No mesh problems either.

It’s easy to change the shaft to 5 or 6mm if you already have the motor but you will need to change counter shaft bearing
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Old 06-26-2020, 07:50 AM   #6 (permalink)
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i can see no reason why it should not work... Pyro 650 103 (i mentioned above) is 4020 (3920) stator. light and powerful enough... only switched it because.... ahhh... hummm... (ok, i wanted some additional punch)

i am running the 550 on 45C/4400mAh packs that are 685g light... cog is ok with it.

Ciao
Michael
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Old 06-26-2020, 08:18 AM   #7 (permalink)
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I bought my Logo 550sx used so at the moment it has the 106t gear and a 12t pinion with the 6mm shim and counter bearing. It came with the 153t main gear also but not a 5mm counter bearing or shim, anyone know what those 2 part numbers are if I were to change it back to the 5mm setting.
I am considering this as if I have to buy a new motor I would like one that it may be possible to use in a Synergy 516 and I know you need a 5mm shaft motor for that.
So I am wondering if a Xnova 4025-1120kv shaft C or a Xnova 4020-1100kv or 4020-1200kv shaft D would work in both a Logo 550 and a Synergy 516, all of those seem to have a 5x32mm shaft.
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Old 06-26-2020, 08:34 AM   #8 (permalink)
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@slumdog

You can find the part you asked about here. https://shop.mikadousa.com/04714-Mot...aft_p_673.html

The Logo 550 is supposed to use the HKIV-4025-1100kv (or equivalent) motor. The Synergy 516 uses the HKIV-4020-1320kv. So smaller with higher kv.

So I am not sure that you could get one motor which works in both unless you compromise somewhere.
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Old 06-26-2020, 08:37 AM   #9 (permalink)
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Also to your original question, about the main gears and pinions. Logo 550 should run 9.56 - 11.7 gear ratio. You can get this with the 153 tooth pinion and the 13-16tooth pinion.

The 106 main gear, with the smallest 11 tooth pinion is 9.63 only. So you would need for sure the smallest pinion if you want to use the 106 tooth main gear.


KD
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Old 06-26-2020, 08:43 AM   #10 (permalink)
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[QUOTE=Rabid121;8094865]my 550 is running Egodrift 4025 1050, was running Pyro 650 103 before... both 6mm shaft. both 106/11 M1. best decision ever

I had not really considered an Egodrift Motor but just looking at the website they look pretty good they do a 4020 and a 4025-1050kv with the option of a 5mm or 6mm shaft.
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Old 06-26-2020, 09:05 AM   #11 (permalink)
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[QUOTE=slumdog;8094915]
Quote:
Originally Posted by Rabid121 View Post
my 550 is running Egodrift 4025 1050, was running Pyro 650 103 before... both 6mm shaft. both 106/11 M1. best decision ever

I had not really considered an Egodrift Motor but just looking at the website they look pretty good they do a 4020 and a 4025-1050kv with the option of a 5mm or 6mm shaft.
Yesss... they are 1st class
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Old 06-27-2020, 10:43 PM   #12 (permalink)
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Thanks for your input KD!!


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Old 06-27-2020, 10:51 PM   #13 (permalink)
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that's a nice motor indeed!




which ESC are you running on this heli? thanks for sharing!






Quote:
Originally Posted by Rabid121 View Post
my 550 is running Egodrift 4025 1050, was running Pyro 650 103 before... both 6mm shaft. both 106/11 M1. best decision ever

the small shims are: 04976
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Old 06-28-2020, 03:47 AM   #14 (permalink)
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Quote:
Originally Posted by Flipper76 View Post
that's a nice motor indeed!
which ESC are you running on this heli? thanks for sharing!
Hobbywing 120 v4... perfect combination. i am using it on the 550 as well as on the 600SX @ 6S.

Ciao
Michael
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Old 06-28-2020, 09:25 AM   #15 (permalink)
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The KONTRONIK PYRO 650-103L works well in the Logo 550. The 6mm shaft is 40mm long and is easily cut to 32mm in a few minutes with a Dremel tool.
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