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Logo 600 › Have anyone try this Logo 600 gear yet?
06-08-2012 12:46 PM  6 years agoPost 21
LaurenceGough

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UK

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I wish Mikado would sort out the roundness of main gears. I emailed them but all they seemed concerned about was the fact that I'm running 12S and have "bad collective management".

Logos are great helis but really let down by the main gear.

I wish they could make the QC tighter on the main gears to take the level of quality up to the rest of the heli.

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06-08-2012 02:13 PM  6 years agoPost 22
GScott

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Lewis Center, OH

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I'm surprised more people aren't using the CNC'd slant gear from Infinity Hobby. More expensive than the stock gear but the few reports I have seen indicate it is very durable.

http://www.infinity-hobby.com/main/...roducts_id=7080

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06-08-2012 02:15 PM  6 years agoPost 23
LaurenceGough

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UK

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The only problem with them is the vertical thrust force they put on the bearings.

I guess the answer is with the slightly larger Logo SX main gear, which is pretty much what Mikado told me as well - not that it's any help at all in the many months until it's released.

Mikado Support:
We recommend to fly with 10s Lipos and counter bearing and a pitch of 100 in VBar setup. This will be 12 degree collective.
Maximum headspeed should be at max. 2250-2300 rpm.

If you don´t want to change your batteries, we have a new main gear soon which is 2cm wider and also a new designed counter bearing.

the motors and batteries will be stronger and stronger every year, so we had to design the SX.

And the LOGO 600 is still a 10s helicopter. 12s provides too much power and you can fly it on your own risk without zero warranty.
This will NOT work properly.

I have already written what are the limits for the 600.

2250 headspeed with 623mm blades or 2300 headspeed with 603mm blades.
12 degree collective.
counter bearing
And a good hand on stick management. Collective and cyclic.

If you want more, wait for the new SX parts.

If you have further questions please call us and speak with Ralf on the phone. I have showed him your email.
Yet people on 10S are still stripping gears and it's just as powerful as 12S.

In the meantime I will just have to keep replacing main gears, hopefully it will not happen in competitions.

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06-08-2012 02:45 PM  6 years agoPost 24
hitomas

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china

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slant gears will cause the logo to a slight vibration

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06-08-2012 03:24 PM  6 years agoPost 25
rappyfly

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Toronto, ONT

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Works for me. 1 st machine Still fly the gear from last summer (crashed it and still good). Now, 2nd bird is on 6th logo stock since April.fingers cross.

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06-08-2012 03:33 PM  6 years agoPost 26
Rossi 19se

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   CA

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I don't think gear stripping is a power issue, just a mesh issue from the gears being out of round, I suppose Mikado had a bad batch of gears. Stock gear is fine with a 4525 and 623s

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06-08-2012 03:37 PM  6 years agoPost 27
mmc205

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PA - USA

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@heliaddict

set mesh on high spot tight, i mean nearly bindinig tight. found low spot, kept slipping pieces of paper in that would feed through without binding, more layers until it nearly did, then measured stack with a micrometer.

***Logo 600 vbar***Henseleit TDR vbar***

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06-08-2012 03:37 PM  6 years agoPost 28
mmc205

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PA - USA

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@rossi 19
yup, soon as i found a good one, my problems were over.

***Logo 600 vbar***Henseleit TDR vbar***

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06-08-2012 05:53 PM  6 years agoPost 29
heliaddict2424

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SCV SoCal.

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@mmc205

That works but won't tell you were the problem is for sure it could be in the pinion or motor shaft you would not know. Chucking up in a lathe I am actually checking the gear itself..

Team MikadoUSA Team Scorpion

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06-08-2012 06:18 PM  6 years agoPost 30
mmc205

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PA - USA

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correct, but it was repeatable, and other gears were right on the money. They measurement may not be perfect, but it proves the point.

And honestly even in the lathe as you did it, your only checking the major tooth diameter. If their is a combination of the root/tooth being off, you would not really see it. measuring the OD only ensures the roundness of the major diameter of the gear profile, but the nothing for the root, or pitch diameter, which could still give you some pretty major problems. The paper method (although very rudimentary) is measuring all three of these to a degree, but your right, the pinion cannon be taken out of the equation, but if the pinion or motor bearings/shaft was out of round, you'd never seem to have a round main gear, which i found several of.

***Logo 600 vbar***Henseleit TDR vbar***

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06-08-2012 07:45 PM  6 years agoPost 31
rappyfly

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Toronto, ONT

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The discussion reaches a point that it brings back old memories when I has my MA furies: checking, adjusting parts for precise fit to ensure flight performance and parts longevity.

One of my friends asked so called "Team Hard Core" at a FF about building helis. His reply was just lock it down and go fly.

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06-11-2012 04:53 PM  6 years agoPost 32
heliaddict2424

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SCV SoCal.

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@mmc205

Not going to get in a pissing match but I think your over thinking things lol.

I found a whole new issue that I have never seen before. Basically that gear in the lathe was round within .002 period. First flight perfect second flight started ticking than basically sounded like the bearing in the motor self destructed or something it was loud but flew fine. After going through everything I found the problem all though I I don;t know why its happening. Basically little piece of plastic are shearing off the main gear. They are becoming wedged down between the teeth of the main gear. This is creating a high spot were ever the plastic is. I scrapped out the plastic which was pretty easy to do in about 10 different spots. It is smooth as butter now. So the method of putting paper in between gear and pinion would give you the impression that that gear or something is out of round when its not. I have posted the video from the flight that the gear started making the noise note video was crappy but sound is good, Also a picture showing the little pieces of plastic I found after flight.

Watch at YouTube

Team MikadoUSA Team Scorpion

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06-11-2012 05:13 PM  6 years agoPost 33
mmc205

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PA - USA

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True, but if circular, fit with paper would be the same anywhere around the perimeter. Also, your sample size is 1, you'd need 10, or better 100 or so from different lots to do a good evaluation. Obviously you're was round, but it sound like your mesh wasn't tight enough, how did you set it?

***Logo 600 vbar***Henseleit TDR vbar***

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06-11-2012 05:14 PM  6 years agoPost 34
mmc205

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PA - USA

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It also appears your herringbone center is misaligned by a good bit from the picture. That will also chip teeth.

***Logo 600 vbar***Henseleit TDR vbar***

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06-11-2012 07:33 PM  6 years agoPost 35
KC

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WA

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that photo looks like lens distortion....alignment can't be told from a snapshot.

Regarding Mikado's canned 12s response....they're good at making helicopters and good at making patronizing and useless responses to emails, seems to run throughout the camp, not unlike another formerly successful heli manufacturer that lost its shirt after telling its customers how its going to be...

herringbone gears....

Not a big deal that it is out of round, the main gear flexes a lot in flight and has to in a herringbone configuration because they cannot slide like normal gears.

What usually strips the mains is play in the mesh. If you are breaking motor shafts off, use a counterbearing....these gears will flex a 5mm shaft.

Not saying it is hard to strip a herringbone, but the beauty of this heli is that it is light enough to not need power, so if it is loaded with big motors and batteries, it will just flex everything down to the drivetrain just that much more.

imho the 600SE is worse for gear problems that than the 600, when the tall gears come out, that should be the first thing to upgrade on a 600SE.

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06-11-2012 10:48 PM  6 years agoPost 36
heliaddict2424

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SCV SoCal.

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I am just providing information on my findings that's all. You guys are way to frustrating. Oh and I knew the misalignment thing was coming lol just the angle of the picture alignment is dead on.

Team MikadoUSA Team Scorpion

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06-12-2012 12:05 AM  6 years agoPost 37
LaurenceGough

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UK

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Aren't most people running 6mm motor shafts? I don't believe they are flexing at all surely...

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06-12-2012 01:27 AM  6 years agoPost 38
KC

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WA

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Laurence I still run 5mm, anything over 10.6:1 requires mod 0.7 and the 12,13,14,15,16, and 17t are 5mm

By "flexing" it's not bending the shaft so much as it is setting up a resonance that will shear a shaft at the top of the pinion...you'd need a perfect storm to do this: 1) 5mm and no counter bearing, 2) a rough runner like an actro, and 3) an apple cored shaft at the bearings...like an older actro.

I don't have anything against actros, the 24s are great motors but the shafts cost 4x more over here and a 4025 scorpion is the same thing for less.

a 6mm shaft shouldn't have much of a problem, especially the scorpions because they require, and should receive, frequent lube. a little red or green loctite on the shaft to bearing contact after taking the vertical play out of the shaft and should be all set.

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06-12-2012 12:02 PM  6 years agoPost 39
mmc205

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PA - USA

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I am just providing information on my findings that's all. You guys are way to frustrating. Oh and I knew the misalignment thing was coming lol just the angle of the picture alignment is dead on.
It's all good, I do have a tendency to over analyze things. All I really know for sure is I do get an occasional out of round gear. Not too big a deal on the 600, bit it pretty much meant instant strippage on the SE.

***Logo 600 vbar***Henseleit TDR vbar***

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06-18-2012 06:03 PM  6 years agoPost 40
Qrrambero

rrKey Veteran

San Francisco / Bay Area

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I guess it would be a fair question to ask how you know this copied gear is "stronger than the stock one"?
Since my friend stripped his SE gear I have follow this topic.
Well, yesterday was my turn.

We do not fly the heli to hard. And I will take my chances with a copy. My friend crashed. I was lucky this time.
The Logo main gear isn't working for the SE.

Ae

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