Skookum SK720 Скачать руководство пользователя страница 14

©2010 Skookum Robotics, Ltd    

27 

 

 
 

Step 7: Cyclic and Tail Gain Input Banks 

 

If you are using satellite receivers, you should have separate control 
over the Cyclic Gain and Tail Gain inputs. By default, the gear channel 
will control the overall cyclic gain and the Aux channel will control the 
overall tail gain. This can be modified on the 

Control

 tab if needed.

 

 

With a traditional radio receiver (no satellites), both the cyclic and tail 
gain functions will be controlled by one channel. To avoid both the 
cyclic and tail banks having the same overall gain, you can lock the gain 
% for any bank. The gain channel will then only select that bank, but 
won’t affect the gains. For example:

 

 

Cyclic Banks 

Tail Banks 

With Only One Gain/Bank Ch: 

Locked 

Locked 

 Selects Tail and cyclic bank, gains fixed 

Locked 

Not Locked 

 Selects banks, and the overall tail gain 

Not Locked 

Locked 

Selects banks, and the overall cyclic gain 

Not Locked 

Not Locked 

Both scaled together (not recommended) 

 

 

For the gain inputs, the direction of the channel’s output will set which 
bank is selected. The endpoint on the channel will set the gain for that 
function. 50% is a safe starting point for both

5

. By default, for the tail 

Bank 1 is “Heading Hold mode”, and Bank 2 is “Rate Mode”. 

 

 

                                                 

5

 For users of JR / Spektrum radios having a gyro gain menu, tail gains of 50% 

equal 0, 100% equal +100 and 0% equal –100. Use values greater than 50% for 
one bank and less than 50% for the other. Alternatively, disable the gyro gain 
menu and set the gain channel end points per the method described above. 
 

©2010 Skookum Robotics, Ltd    

28 

 

 
 

 

 

Check that your radio can select which tail and/or cyclic bank is 

selected, as indicated by a small blue bar over each setup tab. The small 
blue bar shows which switch position corresponds with each cyclic and 
tail gain tab. (See Figure 11.7, below.)

 

 

Figure 11.7 – Offline Setup Values 

Cyclic

 Bank Tab 

 

See Section 16 of this user manual for detailed description of how to use 
the features in the 

Cyclic

 and 

Tail

 gain banks to tune your helicopter.

 

Step 8: Ready for Flight 

 

Save your setup to your computer’s hard drive by selecting 

Save Setup

 

from the 

File

 menu, then go to Section 12 of this manual. 

Final Setup Note:  

The expo, dual-rate, and pitch-curve features of your radio 

can be used normally, as long as they do not exceed 100% travel. 

 

Содержание SK720

Страница 1: ...ety 6 5 Setup Overview 7 6 Mounting the Gyro 9 7 Helicopter Airframe Setup 11 8 Connections 13 9 Modes Indicators and Power Up 16 10 Installing the Windows Setup Software 17 11 Gyro Setup Using the US...

Страница 2: ...s well as mCCPM swashplates Works with 2 3 4 or 5 blades because phase is adjustable Swash Ring anti binding algorithm Expansion port for future accessories such as GPS Optional 20 amp external power...

Страница 3: ...on how to install the SK720 s Windows setup software See Section 11 of this user s manual for a detailed description of how to set up your new SK720 gyro 2010 Skookum Robotics Ltd 6 4 Safety An R C h...

Страница 4: ...lp of the initial configuration wizard Also see Steps 2 and 3 in Chapter 11 of this manual 6 Check for correct sensor readings with the help of the initial configuration wizard Also see Chapter 11 Ste...

Страница 5: ...unit Ideally use a cable sleeve because this maintains a neat appearance while allowing the cables to move relative to one another 2010 Skookum Robotics Ltd 10 We strongly recommend using the Skookum...

Страница 6: ...uch blade pitch action when setting up a rotorhead mechanism originally designed for helicopters with a flybar Either servo travel or servo arm length will also need to be reduced to allow normal gain...

Страница 7: ...k up using a battery or BEC In satellite receivers mode the SK720 also outputs the throttle channel on port IO A T as well as up to three additional auxiliary outputs for such things as a governor lan...

Страница 8: ...in this mode the indicator LED will slowly flash green In Flight mode the LED Indicator will show solid red while the SK720 initializes and will turn solid green once the SK720 is ready to fly The SK7...

Страница 9: ...gram Installation Options Screen There are six check boxes available and all but the SK720 Digital Flybar GUI checkbox can be selected on or off It is recommended that you install all of the available...

Страница 10: ...tware will automatically detect the gyro The Connected indicator in the setup software should turn green and the gyro s serial number and firmware revision should also be displayed See Figure 10 4 bel...

Страница 11: ...t Follow these steps carefully and complete the pre flight check outlined in Section 13 of this manual before flying your helicopter WARNING Do not use any of the Default Scale or Basic_3D setup files...

Страница 12: ...e Rudder yaw axis but slowly rotate the helicopter to the right The Gyro Rate for Rudder should be positive and show green If not select Flip Rudder Axis on the Control Figure 11 2 Setting Gyro Mounti...

Страница 13: ...prevents unwanted interaction at max and min collective Increase the servo travels instead if you need more motion Step 6 Tail Setup Figure 11 5 Offline Setup Values Tail Servo Tab Click the Tail Ser...

Страница 14: ...elected The endpoint on the channel will set the gain for that function 50 is a safe starting point for both5 By default for the tail Bank 1 is Heading Hold mode and Bank 2 is Rate Mode 5 For users of...

Страница 15: ...l Phasing 3 Now try full nose up elevator control with aileron centered Measure the pitch of the blade that extends over the nose 2010 Skookum Robotics Ltd 30 4 The blade should not change pitch if th...

Страница 16: ...Ltd 32 14 Flight with the SK720 Gyro In flight mode the swashplate will not respond to the controls directly Its action will be similar to a heading hold tail gyro After it has been static for a few s...

Страница 17: ...from any orientation including upside down But SK720 will not automatically adjust the collective You will need to manually adjust the collective during a recovery and the helicopter may loose signif...

Страница 18: ...uning banks For each of those banks fly the helicopter as you normally would for at least four flights Use the SK720 setup software to disable self tuning once the gains stop changing significantly 7...

Страница 19: ...steps If the nose goes down increase the Elevator value by 1 or 2 steps If the helicopter banked the right or left you may also have to adjust tail drag compensation for Aileron If it banked right dec...

Страница 20: ...white and gray progress bar may also be used to control playback You can jump forward or backwards in the playback sequence by clicking on the progress bar with your mouse Figure 18 2 on the followin...

Страница 21: ...again Reset Log Counter When flight logging is enabled see the Control Tab section below selecting this option causes the log index number to be reset to zero Thereafter log file names will be LOG0 BI...

Страница 22: ...ns in your helicopter See Section 10 Step 3 for details on how to use these options 2010 Skookum Robotics Ltd 44 Swashplate Tab The Swashplate tab is found in the Offline Setup Values region of the ma...

Страница 23: ...evenly to the maximum rate of the centre servo 2010 Skookum Robotics Ltd 46 Servo Speed Take this value from your servo manufacturer s specifications Units are in seconds per 60 degrees of motion Thi...

Страница 24: ...wind gusts This feature gives the heli a locked in feel Slop free linkages rigid rotor head mechanics stronger servos and stiff blades allow higher gains here When hiller gain is too high the heli wil...

Страница 25: ...The response of the tail blades to the error in rate of motion This is the tail s primary gain Hold Gain The response of the tail blades to accumulated tail position error This allows the gyro to trim...

Страница 26: ...or tilts at one particular rpm Vibration effects on the gyro Make sure it is mounted on good damping tape and doesn t contact the frame Also check for tail rotor vibration Can not set Hiller very hig...

Страница 27: ...ibration is getting into the unit Make sure its case isn t contacting the heli s frame and the wires leading to it are a bit loose For larger helicopters you may want to use a separate power bus to al...

Страница 28: ...pdate process may fail if you do making the unit into a paperweight Your SK720 would then need to be returned to Skookum Robotics for servicing 2010 Skookum Robotics Ltd 56 Appendix C Warranty and Tec...

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