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Mikado Modellhubschrauber . Futaba-RC . Boca Bearings

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Tandem Rotor Helis Vertol Chinook > Front Shaft Slipping!!!! NEW SOLUTION...
 
 
doorman
Elite Veteran
Location: E.Berne, NY

My Posts This: Topic  Forum		Well, I thought I had found the solution to the from main dropping down by adding another mast collar above the lower bearing along with the upper lock.... well it moved again!!!!!
When I took a good look the main gear had moved down and the mast lock above the lower bearing had actually worked the bearing almost out of the bearing holder....meaning the shaft had moved down about 3/8".... and I was wondering why it kept sticking it's nose up while attempting to fly....
The new solution that we/the "gang", came up with at the Southern Heli Challenge...(if you are into SCALE, you want to attend this one!!!)
Check that ALL is where it belongs and that the ms is completely in the proper location... then with the set screw out of the top mast collar, mark the center of the hole on the shaft.... then center punch it and remove the shaft.... drill/mill a "dimple" into the main shaft at your mark.... then reinstall everything....and when you go to install the mast lock, make certain that you align the set screw with the dimple and run it in slowly until you feel the collar and set screw align and it goes into the dimple....(don't forget the loctite!!!)
And ONLY USE THE ONE SET SCREW into the dimple, leave the other side out.... and you can leave the second/lower mast lock off, it will not be needed.....
I hope this message gets to you before you need to replace another main gear!!!!!!
So far this looks like the best solution yet and I don't think I will have another problem in this area....
Good Luck, Stan

Team Hirobo/MRC --- RCLIGHTS.NET ----- If there is a cure for this, please don't tell me about
09-13-2008 Over year old.
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doorman
Elite Veteran
Location: E.Berne, NY

My Posts This: Topic  Forum		Looking GOOD!!!!!!!!!!!!!!!!

Put three flights on today, with some "rippen" FFF and some hovering nice slow flights.....and no sign of anything moving and no markings on the main gear.... it all looks fine.....


Stan

Team Hirobo/MRC --- RCLIGHTS.NET ----- If there is a cure for this, please don't tell me about
09-14-2008 Over year old.
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Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum		I used pointed set screws and put a drop of loctite 680 between the collar and the shaft, I'll have to cut it off to remove it!! (most likely just a little heat will do it but the stuff is tough) With loctite 680 I don't think set screws are even required! I have used it in many Industrial repair applications in which years later worn, spun, poor fitting shaft journals that were planned for future repair are still in place working fine, and these are machines that run 24/7 and take a constant pounding. Loctite makes many products and used in the right applications on cleaned components have performed miracles for me in my professional occupation. You can even try loctite 620 which is a wicking grade of thread lock that can be applied to an already put together set up such as between the collar and shaft and it holds great, just be careful around bearings as it will wick right into them too if too much is used and lock them right up, right through the grease and oil!!!
09-14-2008 Over year old.
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avconslt
Senior Heliman
Location: Houston, Texas

My Posts This: Topic  Forum		I put my two collars on with a small drop of Green Locktite and it seems to be holding fine! But, I still check for up and down play in my front shaft before ever flight, just to make sure! If it ever does slip again, I will do as Stan suggested and drill a little dimple in the shaft for the set screw! It sounds like a great idea!

Richard

o
09-15-2008 Over year old.
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phrogs
Heliman
Location: SW michigan near kalamazoo

My Posts This: Topic  Forum		Do you have any photos of this job?

forgive me Im still In Iraq!

I get to see the real ones fly around


later

jp
09-21-2008 Over year old.
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doorman
Elite Veteran
Location: E.Berne, NY

My Posts This: Topic  Forum		Update!!!!!

Well, I have flown the machine at least 2 dozen flights since this "little" fix and the problem seems to be GONE COMPLETLY!!!!! And that is a BIG PLUS.... the heli is really dialed in now and I can cruise around comfortably with it..... I am LIKING that!!!!!

Oh and where did everyone go!!!!!!!!!!!!! It's not winter yet!!!!!!

Stan

Team Hirobo/MRC --- RCLIGHTS.NET ----- If there is a cure for this, please don't tell me about
09-30-2008 Over year old.
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Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum		I'm rebuilding a sun porch, from floor, walls, to windows, from a 3 season proch to a 4 season sunroom, YUK!!! There goes my next helie!!!
10-02-2008 Over year old.
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doorman
Elite Veteran
Location: E.Berne, NY

My Posts This: Topic  Forum		WHY????????!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mike, you just NEED TO TAKE A BREAK and get some flying in before the snow flies.... Tell her I said it would be OK!!! I am sure that will help a lot!!!!

Good Luck with your project and hope to hear from you soon!!!!! Mine is working GREAT with that little mod on the front shaft... LOVIN'IT


Stan

Team Hirobo/MRC --- RCLIGHTS.NET ----- If there is a cure for this, please don't tell me about
10-02-2008 Over year old.
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Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum		Taking a Break

No doubt I need one, between work and home it's getting hard to tell the difference lately. This is a project I have put off for 2 years and it ain't going away so I figured get it done already then back into helies in the spring. After this one I know Santa (me) is going to get me some thing GREAT for Christmas for being such a good boy this year, and the wife will not be able to say any thing about it in front of the kids or ever for that matter!! God it's great knowing Santa personally!!

Glad to hear your twin is flying well, I still need to spring for a Helicommand ridgid as forward flight with mine should not be as much work as it seems to be, but that comes in a little smaller box then I am planning to ask Santa for this year!!!!!!!!! (like turbine or electric Vario 222)
10-03-2008 Over year old.
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dcloukota
Heliman
Location: Glendora, CA

My Posts This: Topic  Forum		My Hirobo CH-47 cost me a new kitchen, master bath, hallway and master bedroom remodel. I hate to guess what a Vario turbine Sky Crane is going to set me back. Maybe Christmas 2020 if I'm still on the right side of the grass.

Cheers, Doug
10-03-2008 Over year old.
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Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum		YEA, LOVE the sky crane myself, all those blades give me a woody!!

Like the right side of the grass part, never heard that one before, gave me a MUCH NEEDED giggle after the week at work I have endured, YUK

Stan, your right, I got to at least get some flying in the front yard sessions in this weekend, keep the fire alive!!
10-04-2008 Over year old.
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doorman
Elite Veteran
Location: E.Berne, NY

My Posts This: Topic  Forum		Weather Is Great!!!!!

Turbinator

Gonna hold you to it...... we want to hear a report on your flights Monday!!!!!!

If I had to build something on the house for every heli that I have or had, I would be living in a MANSION!!!!!!!!!!!!! BUT they are no fun if you not flying them!!!!

Stan

Team Hirobo/MRC --- RCLIGHTS.NET ----- If there is a cure for this, please don't tell me about
10-04-2008 Over year old.
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Turbinator
Senior Heliman
Location: Nanticoke, PA

My Posts This: Topic  Forum		Weather WAS GREAT!!

Yes, the weather was perfect, sunny, 65, dead calm, couldn't resist putting the hammer down and doing some stick time, even if was just in the front yard. Vertol LOVES the calm, flew, then back to chores while batteries recharged, ended up doing 3 cycles, got lots of work done, and FUN too, PURE HEAVEN.

THANKS for the push, I needed it!!

10-07-2008 Over year old.
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XHELI.COM . Autography FlightPower . Advantage Hobby

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Tandem Rotor Helis Vertol Chinook > Front Shaft Slipping!!!! NEW SOLUTION...
 
 
doorman
Elite Veteran
Location: E.Berne, NY

My Posts This: Topic  Forum		Made Us PROUD!!!!!!!!!!!!!!!!!

Mike, you done good!!!!!!!!!

Keep sneaking those flights in... might help to keep you sain!!!!!

Get those projects done.....

Stan

Team Hirobo/MRC --- RCLIGHTS.NET ----- If there is a cure for this, please don't tell me about
10-07-2008 Over year old.
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Mikado Modellhubschrauber . Futaba-RC . Boca Bearings

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Tandem Rotor Helis Vertol Chinook > Front Shaft Slipping!!!! NEW SOLUTION...
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