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Logo 600 › I got this Big Issues about this Logo 600​Parts....
02-18-2011 03:31 AM  6 years agoPost 1
Logotoys600

rrApprentice

N,Cali

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http://www.readyheli.com/MIK2385-Cl...ft_p_35148.html

Not Enough Metal ....

DONT CARE WHAT BRAND IS IT.....JUST WANNA LEARN TO FLY

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02-18-2011 04:09 AM  6 years agoPost 2
helicraze

rrElite Veteran

Victoria - Australia

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I think it was overtightened, agree they could make it stronger

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02-18-2011 04:24 AM  6 years agoPost 3
mikmerl

rrApprentice

Athens, Greece

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The Logo’s are designed to be very light. Possibly too light in some instances.
I also had one of these die on me and I decided that a stronger one should be used as a replacement.
I have years of flying Vario helicopters and they are definitely designed to last and fly forever.
Use the part in the link below and you will never have this problem again.
Ord.No. 54/9

http://us.vario-helicopter.biz/shop...oducts_id=34466

mike

Vario Bell 47g II, Vario EC135, Vario BO 105 big, Vario Benzin trainer, Logo 600SE, Logo 550

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02-18-2011 05:17 AM  6 years agoPost 4
g_dmitry

rrApprentice

Edmonton, AB, Canada

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I think it was overtightened, agree they could make it stronger
Agree, looks like they have been overtightened very bad.
I have found that most of the people put to much force tightening this part and swash driver.

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02-18-2011 06:56 AM  6 years agoPost 5
Logotoys600

rrApprentice

N,Cali

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Thanks To mikmerl

That look heavy duty I will order one,...

DONT CARE WHAT BRAND IS IT.....JUST WANNA LEARN TO FLY

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02-18-2011 07:06 AM  6 years agoPost 6
Smacka

rrApprentice

PA

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Without completing a metallurgical analysis on the broken part, it is extemely unfair to draw conclusions as to the failure mode.

First, you have to know what the parent material specs are for the part. Then, you can conduct testing to see if the part meets the material specifications (ie yeild strength, hardness, density, etc..). Is it made out of powder metal, or rot material?

Furthermore, did the part have flaws before being sold? Acceptable parts per million failure rate in the automotive industry is 4-PPM (a 1.33 cpk value). So, is this part one of the 4 in a million that is KNOWN to ship faulty?

I highly doubt radio control parts are held to the same standard that automotive parts are held to, so the PPM is much worse!

Just change out the part and go fly But be careful not to automatically ASSume the pilot over tightened the part and caused his own failure...

fwiw...I have a strong back ground in Aerospace Engineering and Metallurgy.

Happy Flying,
Smacka

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02-18-2011 09:25 AM  6 years agoPost 7
krtek2k

rrApprentice

Decin, Czech​republic

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I use on my logo colar from trex600. It is available with every 2pc mainshaft t600 spare. So if You ask friend with trex600, he give You one for free.

flying without padles is better , but be sure to get electronic ones

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02-18-2011 01:08 PM  6 years agoPost 8
mikmerl

rrApprentice

Athens, Greece

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Should you choose to use the Vario ring clamp.
Make sure that you use one or two of the shims that are supplied in the kit or with the Main shaft belt pully as the clamp is has a larger OD and my slightly rub against the plastic frame on top of the bearing.
I sincerely doubt that you will ever need to replace this component.

mike

Vario Bell 47g II, Vario EC135, Vario BO 105 big, Vario Benzin trainer, Logo 600SE, Logo 550

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02-18-2011 01:21 PM  6 years agoPost 9
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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I have had them fail too but I know it was because I overtightened it

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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02-18-2011 01:28 PM  6 years agoPost 10
DanSch

rrNovice

Goodyear,AZ

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i have "gorilla handed" my collar also, mostly because it has slipped in the past, i now use a steel collar for a few years now and have not had a problem since..

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02-18-2011 01:43 PM  6 years agoPost 11
mmc205

rrElite Veteran

PA - USA

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Without completing a metallurgical analysis on the broken part, it is extemely unfair to draw conclusions as to the failure mode.

Its actually pretty obvious that its a failure due to a combination of over-tightening and marginal design safety factor. (no disrespect to the op, overtightening RC items is pretty easy as we're all used to working with larger bolts screws in or daily lives, i've done it myself)

-Three ways to tell,

-2 pieces broken in the same place (not a huge sample, but far better than just one)

-Failure doesn't occur due to flight loads, typically only during assembly

-fracture shows classic brittle break marks characterized by a lack of "necking" of the material.

Some of these aluminum components are made smaller, lighter and heat treated to have a stronger, yet more brittle demeanor.

fwiw... I have Masters in Engineering with a background in complex machinery design, systems analysis, and failure mechanics.

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

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02-18-2011 01:56 PM  6 years agoPost 12
dialtone

rrApprentice

Ontario- Canada

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collar

All i do is heat it up a bit with a heat gun or hair dryer.
Never had it break on me.

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02-18-2011 02:14 PM  6 years agoPost 13
MrMel

rrProfessor

Gotland

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Doesnt matter if they are steel, I broke numerous on MA helicopters until I learned how to tighten them, turn until it stops, then 1/4 turn more, nothing more than that.

Never broke one since, not on the logo not on any other machine, never had one slip either except for crashes.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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02-18-2011 02:27 PM  6 years agoPost 14
mmc205

rrElite Veteran

PA - USA

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the proof is in the pudding, thanks mr mel.

Never broke one since, not on the logo not on any other machine, never had one slip either except for crashes.

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

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02-18-2011 03:40 PM  6 years agoPost 15
Smacka

rrApprentice

PA

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MMC205...That is amazing that you can conduct a metallurgical analysis looking at a singular macro photo. Guess that is the difference between a "Masters" and 37-year "Bachelor of Science"...they must teach you guys how to conduct testing with your eyes...without a SEM. I sure wasted my education at Penn State...damn...

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02-18-2011 04:31 PM  6 years agoPost 16
SGrim80

rrVeteran

Lehigh Valley, PA

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No need to turn everything into a pissing match, I'd also agree that its likely due to over-tightening. Most people overtighten things when building. No need to crank down on it.

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02-18-2011 04:48 PM  6 years agoPost 17
rnkasp

rrApprentice

Pottstown, PA USA

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Well I guess we can all come to the conclusion that chances are the part was overtightened. I've broken three myself. No need for any scientific testing, just responses from people who have real hands on experience with the problem. In my opinion if you don't have a Logo and you haven't broken a collar then there isn't any need to post your opinion. Just my 2 cents.

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02-18-2011 05:20 PM  6 years agoPost 18
Smacka

rrApprentice

PA

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In my opinion if you don't have a Logo and you haven't broken a collar then there isn't any need to post your opinion. Just my 2 cents.
No logo? Have not broke a collar? No right to post?

Well, you have been wrong on all three accounts...

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02-18-2011 05:28 PM  6 years agoPost 19
Smacka

rrApprentice

PA

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This is NOT a pissing contest. It is two engineers that differ in fundamantal thought.

Being a mechanical engineer...no, strike that...every engineer is taught NOT to jump to conclusions just because you "think" you know the failure mode.

Necking cannot be determined in a macro photo. At the very least, it would require a micro photo, and better yet...a scanning electron microscope. MMC205 knows this...he just chose to state otherwise. No one with a Masters would overlook any possiblity.

Additionally, at no time in Logostoy original post did he state the failure happened while he was tightening down the screw. He gave zero information about the break, only a photo. That is why I stated zero facts, all speculation. So to say it did NOT happen in flight is a guess.

Look guys, all I stated was do not jump to conculsions without any facts.

Now, I leave you to continue your bashing. You do so well at it

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02-18-2011 05:30 PM  6 years agoPost 20
Riq

rrKey Veteran

ND

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Broke one too from over tightening.

Seems lots have learned the hard way on this one.

I like the trex600 idea, but I havent broke one since seeing they dont need much torque to hold strong.

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Logo 600 › I got this Big Issues about this Logo 600​Parts....
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