RunRyder RC
 2  Topic Subscribe
WATCH
 1 page 450 views POST REPLY
Scorpion Power Scorpion Power
HelicopterBeginners Corner › Tail rotor questions
09-11-2007 03:45 AM  10 years agoPost 1
HomerSimpson

rrNovice

OH

My Posts: All  Forum  Topic

Logitech 2100t came today and I installed it.

There are two issues one with the gyro and one with the tail rotor pitch. I am hoping that it is late and I am not just thinking straight at the moment.

Although I did read the instructions for the 2100t I pretty much followed a good post at rcgroups about how to set up the 2100t. The two issues I have are...

1) I set the limits (in the gyro) and they seem to function properly while I am in the setup mode (on the gyro). However, as soon as I am in normal operation mode the slightest movement of the rudder in either direction will put the tail rotor movement to its extremes. Meaning that it is very sensitive. Is this because I am not flying?

2) I can create a lot of pitch on the tail rotor blade in the direction where it is moving with the torque. However, I can't get much in the direction that is fighting the torque. I disconnected the servo and determined this is a mechanical limit. This seems backward to me since I will need more pitch in the blade to fight the torque. I have been re-reading the 450XL-CDE manual and it looks like the heli is setup correctly. I just don't see any way to adjust this. Sure I can adjust the servo but there is a mechanical limit. If I am in the center of the travel the blade has quite a lot of pitch. If this were in the correct direction I wouldn't worry.

Now that I have everything put together and the blade tracking now looks correct to me I spun the thing up in my basement without anything holding it down. I notice a few things that are not surprising given the above two issues...

If I go to neutral pitch on the main rotor (about half throttle) quickly, the heli twists from the torque. If It do it slowly it appears to hold OK. This seems to be the case at any gain setting in tail lock mode or in non-tail lock mode.

If I turn to the left (ie the boom swings to the right) it does this very quickly with very little stick input. If I turn right, the heli goes to full pitch with very little stick input but moves slowly the other way. I expect this because I can't get much pitch and I am fighting the torque from the main rotor.

The main blades and the tail rotor appear to be moving in the correct direction as illustrated in the manual. At least to me they do.

What am I missing?

Thanks

PM  EMAIL  HOMEPAGE  Attn:RR
09-11-2007 04:33 AM  10 years agoPost 2
nrad2000

rrVeteran

USA

My Posts: All  Forum  Topic

I'm completely new to this hobby and had a similar experience with my gyro. I have a Raven 50SE with a JR G500T gyro and a Hitec HS-6965HB tail servo. When I first connected the electronics I tested the tail movement on the heli. Just a slight movement of the stick (quarter way to one side) the servo made a full swing in that direction. I adjusted the LIMIT on the gyro and that corrected the binding. But still, it was making a full swing with slight input. I than went into my radio settings and played with the +/- servo travel adjustment. This than corrected the throw on my control input to servo movement. Now with full left or right rudder - it makes the same amount of movement on my servo. I also have a remote gain control - it's hooked to my "Gear". So, I can have two different settings with a flick of a switch. from little tail authority to strong tail authority.

While on the ground - my tail servo chatters and slowly moves to one side. once in the air - tail works just fine. Probably chattering like crazy but doing its job.

I'm not sure if I answered your question but I too had issues with my tail and it was all in my transmitter setting.

PM  EMAIL  Attn:RR
09-11-2007 12:31 PM  10 years agoPost 3
HomerSimpson

rrNovice

OH

My Posts: All  Forum  Topic

Thanks. I guess the full swing with little stick input is normal. I can adjust the travel on my radio to correct that. I just wanted to make sure I didn't do something wrong.

I also set the gyro gain to a switch so I can go to TL mode to non-TL mode.

When I get home from work tonight I will look at the mechanical adjustments again to see if I can get more pitch in the tail rotor.

Thanks

PM  EMAIL  HOMEPAGE  Attn:RR
09-11-2007 03:25 PM  10 years agoPost 4
BarracudaHockey

rrMaster

Jacksonville FL

My Posts: All  Forum  Topic

You DO NOT adjust the travel in the radio to correct for movement of the servo.

Adjusting the travel adjust is for setting the piro rate only, servo travel is set on the gyro.

It moves to the stop because its telling your helicopter to do something and its not doing anything on the bench so it trys up to its mechanical limit to get the heli to do what its told and sits there till it does.

Andy
AMA 77227
http://www.jaxrc.com

PM  EMAIL  GALLERY  Attn:RR
09-12-2007 12:36 AM  10 years agoPost 5
nrad2000

rrVeteran

USA

My Posts: All  Forum  Topic

BarracudaHockey, you have helped me a lot in answering many of my questions in the past. I have a question again. Travel adjust: at 50% right or left wouldn't the servo move 50% when at full right or left throw of the rudder stick? On my transmitter "JR 6102" I can control the amount of tail movement thru "travel adjust" in respect to my stick input. My gyro "G500T" does have a "limit" adjust - Should I be using the gyro and leave the "travel adjust" to 150%. 150% would be the maximum resolution on my controller.

Before using the travel adjust - when I move the stick slightly to left or right - the servo makes a full swing. is that normal?

I'm still learning this hobby - maybe I should spend more time on my TX.

What is piro?

PM  EMAIL  Attn:RR
09-12-2007 04:03 PM  10 years agoPost 6
BarracudaHockey

rrMaster

Jacksonville FL

My Posts: All  Forum  Topic

First off you have to throw the idea out of your head of setting servo throw on a HH gyro with travel adjust.

Set them to 100/100

Put the gyro in rate mode.

Adjust the LIMIT so you get max throw without binding.

From there fly it and do a piro. If the piro is too fast lower your travel adjust in the transmitter, if its too slow up it (slowly) till you're comfortable with it.

Travel adjust in a HH gyro tells the gyro how fast to allow the helicopter to spin, not how far to move the servo.

Andy
AMA 77227
http://www.jaxrc.com

PM  EMAIL  GALLERY  Attn:RR
09-12-2007 04:10 PM  10 years agoPost 7
Pistol Pete

rrProfessor

Seffner, FL

My Posts: All  Forum  Topic

What is piro?
short for piruete or "spin"

heli doing a 360 circle within its main axis or shaft

hold heli by main grips and spin the heli...thats a "piro"

~~Enjoying the hobby one flight at a time~~

PM  EMAIL  HOMEPAGE  GALLERY  BLOGAttn:RR
WATCH
 1 page 450 views POST REPLY
Scorpion Power Scorpion Power
HelicopterBeginners Corner › Tail rotor questions
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Tuesday, September 26 - 4:47 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online