RunRyder RC Helicopter Topic - Copterworks Maxi Joker modifications

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Aerial Photography and Video > Copterworks Maxi Joker modifications

JOSS750Z
Heliman
Location: Paris...France

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Hi
I made some modifications on my Copterworks Maxi Joker conversion..After some vibrations problems i made a new mechanics for 12mm rotor head ...i will try it in two or tree days ...
I will give you some news after the test
Joss

10-28-2009 11:49 AM

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Seablade
Key Veteran
Location: floating around

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Thanks for the close-up of the frame!

"Vini, Vidi, Velcro"

10-28-2009 12:38 PM

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papatango
Veteran
Location: Toronto, Ontario, Canada

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Why did you put a Vario head on???

10-28-2009 03:19 PM

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JOSS750Z
Heliman
Location: Paris...France

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Because i had some vibrations problems with the Minicopter rotor head ...i saw Gerd himself and we never find the real problem...so i decided to try another rotor head ...bigger. and stronger...
I will see the result in 2 days...

10-28-2009 04:44 PM

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Makiedog
Senior Heliman
Location: Minneapolis

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Looks like no vibration dampeners, everything is rigidly fastened?

Pat L

10-28-2009 04:53 PM

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JOSS750Z
Heliman
Location: Paris...France

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Not necessary to use dampeners

10-28-2009 05:22 PM

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bill the greek
Veteran
Location: www

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Quote
Not necessary to use dampeners

Why? What kind of vibes do you try to resolve?
High or low?
I ask cause in head conversion that you try, the only vibe that you can kill is the low vibe.

Bill

Nobody is Perfect but who want to be Nobody...

10-28-2009 11:25 PM

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JOSS750Z
Heliman
Location: Paris...France

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Yes it s low vibe for now, but a the beginning the vibes could be very violent until crash...I've been to see Gerd (Minicopter)and during near two days we made some test but, we don't really find the problem..
Evry time that my rotor head speed was around 1200 rpm the vibrations was there and if i put slower speed no vibes and if i put more speed the vibrations can be very violent...All the parts have been balanced...etc....
So i have decided to try a new rotor head stronger...we will see the result tomorrow ..
Joss
Sorry for my English...lol

10-29-2009 01:25 PM

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JOSS750Z
Heliman
Location: Paris...France

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"I have same the model like yours.
Yes, I also have same paint(vibe) like you.

I flight with the copterworks Joker Maxi more than three month ago,
but I never resoled this problem.

Now I changed the tail be Dual-Drive system but I did not test it yet.I hope I can tell you good news if I have no crashed then."
Apparently I am not alone ....!!
If someone else have some other informations...?

10-29-2009 07:13 PM

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JOSS750Z
Heliman
Location: Paris...France

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Hi everybody
I' ve been flying with the new rotor head , and all the vibes are gone ...the rotor head speed was 1320 ... it's look like another heli...very cool ...
A video link will follow soon
Joss

11-01-2009 08:17 AM

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Stepino
Heliman
Location: Prague, Czech Rep.

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Good news!

11-01-2009 09:14 AM

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Seablade
Key Veteran
Location: floating around

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what rotor head did you change to?

"Vini, Vidi, Velcro"

11-01-2009 10:21 AM

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kou
New Heliman
Location: Japan

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It sounds good JOSS750Z!
I also changed the same rotor head of Vario too.
I hope I can got the same effect like yours sooner.

Thanks your information.

11-01-2009 12:04 PM

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Stepino
Heliman
Location: Prague, Czech Rep.

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Yes, it sounds good - is it this head you have used?

http://cz.vario-helicopter.biz/shop...a597846b3842090

What other changes are necessary to use it?

We are fighting with vibrations too and this mod can probably help (I hope :-)

This is an example: http://www.youtube.com/watch?v=2RfhkQ6gOCQ

11-01-2009 01:19 PM

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JOSS750Z
Heliman
Location: Paris...France

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Here the link to see the fly test
http://www.youtube.com/watch?v=-6_lSjf7N1o
Joss

11-01-2009 01:29 PM

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kou
New Heliman
Location: Japan

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I think more easy is use 10mm shaft and use Vario head 1005/60
which for GS model.
Now I just changed Vario 10mm shaft the hole for main gear was no problem install and the length seems enough for the rotor head.

I fight with my Copterworks Joker Maxi2 more than 2 month.
It was really violent vibration every time.
The vibration shakes off the camera and broken servos,,,.
I hope my nightmare go out from me away sooner.

I going to test this week.

11-01-2009 01:36 PM

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JOSS750Z
Heliman
Location: Paris...France

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For me i had to made a new aluminium parts for 12mm main shaft and ball bearing, and i made a new main shaft i change the length for a little beat longer you can see the result on the video....it's perfect for me...
if someone need details PM me
Joss

11-01-2009 02:05 PM

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Gerd
Senior Heliman
Location: Vellmar/Germany

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Hi Joss,

I have your visit a little bit different in my mind:

1. You came the late afternoon and my first impression was that your model is very heavy (15kgs/30lbs. about) and was using soft O-rings in the head. After changing to hard rings we have decided to make a small test flight but for more it was too dark now.
2. The next day the main problem we found was a heavy ground resonance caused from a too high gyro gain and the (understandable) fear to lift up the model. The gyro was adjusted to a very high value and has started a resonance circle with the soft landing gear. After reducing the gyro gain to a moderate level of about 40% and a fast lift-off now the machine flew well in hovering and you were happy.
3. Then your tail servo has failed in your opinion temporarily and you have decided not to make further tests higher in the air in forward flight. You have leaved us so about noon.
4. One week later you informed me on phone that eveything is working fine now.

These are my memories from your visit, am I wrong?

Where is your upside-down cranked tail? It has disappeared...

My recommendation: Down with the weight as much as possible!

11-02-2009 06:13 PM

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SeismicCWave
Veteran
Location: Hilo, Hawaii

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Gerd,

Thanks for clarification. It is so interesting to see different perspective on the situation.

Personally I feel that the original poster has taken a perfectly good Maxi Joker and proceeded to butcher it by pointless modifications.

Some times just because some one can doesn't mean that some one should.

11-02-2009 06:18 PM

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Seablade
Key Veteran
Location: floating around

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I am not familar with the Copterworks frame modification aside from seeing it in photographs.
Both you guys say you are using Vario heads.
What happened to the original Maxi-Joker head and did you use that when you first made the conversion?

"Vini, Vidi, Velcro"

11-02-2009 06:48 PM

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Aerial Photography and Video > Copterworks Maxi Joker modifications

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