Register | Log in
 
Electric-RC-Helicopter.com's Homepage
AlbumAlbum  | FAQ | Search | Memberlist
 

new tail rotor


Custom Search
Post new topic   Reply to topic
Electric Rc Helicopter Forum Index -> T-REX
 
Advertisements


View previous topic :: View next topic  
Author Message
Trouble
Extreme 3D
Extreme 3D


Joined: 12 Aug 2010
Posts: 910
Location: Galveston, Texas

PostPosted: Wed Dec 01, 2010 8:47 am
PostPost subject: new tail rotor
Reply with quote

hiya guys, just just got this in the mail, been lookin' at this for a long time, finally broke down and got it:


matches the new head:
Back to top
View user's profile Send private message
Crashagain
Extreme 3D
Extreme 3D


Joined: 17 Jan 2008
Posts: 1380
Location: Redding, Northern Calif.

PostPosted: Wed Dec 01, 2010 11:24 am
PostPost subject:
Reply with quote

OOOOOOOOO...... Shiny things....
Those look really nice. Can't wait to see them on the heli..
Back to top
View user's profile Send private message
tombo242
Admin
Admin


Joined: 04 Nov 2008
Posts: 4718
Location: Santo Estêvão, East Algarve, Portugal. Now 82, but still feels 22.

PostPosted: Wed Dec 01, 2010 6:32 pm
PostPost subject:
Reply with quote

I would just love a set like that Razz .

Idea Now where did I put stª Claus' address? Wink

Tom.
Back to top
View user's profile Send private message
Dumb Thumbs
Extreme 3D
Extreme 3D


Joined: 01 Jan 2008
Posts: 892
Location: USA, N.J., Middlesex county

PostPosted: Thu Dec 02, 2010 5:28 am
PostPost subject:
Reply with quote

Looks cool, but are the blade grips counterbalanced to overcome the rotational forces that try to always center up the grips (tennis racket effect).
Back to top
View user's profile Send private message
Trouble
Extreme 3D
Extreme 3D


Joined: 12 Aug 2010
Posts: 910
Location: Galveston, Texas

PostPosted: Sun Dec 05, 2010 11:47 pm
PostPost subject:
Reply with quote




-------------------------------------------------------------------------------------

Hiya DT Cool
I'm sorry, but I have no earthly idea of what you mean Embarassed Crying or Very sad Sounds impressive though Shocked .
Back to top
View user's profile Send private message
tombo242
Admin
Admin


Joined: 04 Nov 2008
Posts: 4718
Location: Santo Estêvão, East Algarve, Portugal. Now 82, but still feels 22.

PostPosted: Mon Dec 06, 2010 6:32 am
PostPost subject:
Reply with quote

Hi Trouble,

Just had to step in here. The normal tail blades act like a gyro and try to hold the blades against the servos' thrust. This makes it hard to move the tail.
The weights are designed to make the tail appear to be more like a sphere so that the gyroscopic effect is reduced, reducing the strain on the servo.

You can feel this if you run up the heli with no head and the tail servo link disconnected at the servo, then try to move the tail link. It requires some pressure. Fit the counter weights and try again and the pressure is reduced. Gives a better servo response and longer servo life, also a better controlled tail. A real win, win situation. Very Happy

Tom.
Back to top
View user's profile Send private message
Crashagain
Extreme 3D
Extreme 3D


Joined: 17 Jan 2008
Posts: 1380
Location: Redding, Northern Calif.

PostPosted: Mon Dec 06, 2010 7:50 am
PostPost subject:
Reply with quote

This is the unit I am using
http://www.k2heli.com/proddetail.asp?prod=TAILMODJIG2
It really does make a difference in the performance of the tail.
Back to top
View user's profile Send private message
Trouble
Extreme 3D
Extreme 3D


Joined: 12 Aug 2010
Posts: 910
Location: Galveston, Texas

PostPosted: Mon Dec 06, 2010 11:03 am
PostPost subject:
Reply with quote

Is this the Chinese weight thingie we were discussing a few weeks ago?
if not then I guess I better see about getting this done, I for sure like the idea of longer servo life and better tail control!! Wink
(Tom, I think this requires another in-depth discussion on Skype, cuz, i still don't understand what the heck it means...lol)
Back to top
View user's profile Send private message
Crashagain
Extreme 3D
Extreme 3D


Joined: 17 Jan 2008
Posts: 1380
Location: Redding, Northern Calif.

PostPosted: Mon Dec 06, 2010 11:37 am
PostPost subject:
Reply with quote

Here is a little video showing the effect at work.

Link

And here is a simple description:

"The tennis racket affect is " the centripetal twisting movement on the tail rotor blades which forces the blades to seek a 0 pitch condition " in other words when your tail rotor spins, it will try to maintain 0 pitch. When you try to increase the pitch, the force to prevent the blades from twisting will increase too. Chinese weights will counter act this force."
Back to top
View user's profile Send private message
tombo242
Admin
Admin


Joined: 04 Nov 2008
Posts: 4718
Location: Santo Estêvão, East Algarve, Portugal. Now 82, but still feels 22.

PostPosted: Mon Dec 06, 2010 6:09 pm
PostPost subject:
Reply with quote

Good video that Crash, really shows you what's what in simple terms. Thanks for posting it.

Tom.
Back to top
View user's profile Send private message
Trouble
Extreme 3D
Extreme 3D


Joined: 12 Aug 2010
Posts: 910
Location: Galveston, Texas

PostPosted: Tue Dec 07, 2010 2:45 am
PostPost subject:
Reply with quote

OK! I got it now! Very Happy Sorry, just not real smurt I guess... Embarassed To reiterate what he said, That was a dramatic difference! I had done that with mine just b4 my heli tried to make a nest in that tree, so..kinda never got to see the difference, and I 4got when i re-built her. Of course, mine was homemade, a longer screw with 2 nuts on it.
thanx alot Crash and Tom!! Wink
Back to top
View user's profile Send private message
Dumb Thumbs
Extreme 3D
Extreme 3D


Joined: 01 Jan 2008
Posts: 892
Location: USA, N.J., Middlesex county

PostPosted: Tue Dec 07, 2010 5:56 am
PostPost subject:
Reply with quote

Another advantage to having the "Chinese Weights" can come into play if you are running a linear BEC built into the ESC. Most linear BEC's can barely cover the demand of 3 cyclic servos, a digital tail servo and gyro. Now if your tail servo is constantly struggling against the centrifugal force causing tail grips wanting to return to center all the time... Well that may be just too much Amp draw for the BEC to handle. The end result "could" be a radio brown out, leading to another "brown out" in the pilots shorts Shocked
Back to top
View user's profile Send private message
Display posts from previous:   
Electric Rc Helicopter Forum Index -> T-REX All times are GMT + 7 Hours
Post new topic   Reply to topic
Page 1 of 1
Jump to:  

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum




Electric Rc Helicopter topic RSS feed 

SmartFeedSmartFeed




Electric-RC-Helicopter.com