Heading Lock gain
This sets the degree of resistance the gyro provides to unrequested heading changes. In the analogy above it is like the strength
of the 'spring' holding the tail in the desired direction. In small electric helicopters where the response speed of the model is
high and the servo speed relatively low we have found that some reduction in the heading lock gain is beneficial. In some
cases reducing the heading lock gain to about half the default value my be required. In these cases see also the Acceleration
gain.
Please note: if you want a 'standard' (non Heading Lock) mode set the Heading Lock Range to zero.
Direct coupling
This provides the gain-independent servo movement linked directly to the demanded yaw rate from the stick position. Only
small values of this parameter are desirable in helicopter tail rotor use and the default value is zero. However, for special
applications this parameter can be used to set up a 'straight through' (non-gyro) mode. Such a mode is useful in a fixed wing
model where mode 1 is used to assist keeping the model straight on the take-off while the gyro in mode 0 simply transmits the
rudder command to the servo for normal flight. The straight through mode would have zero values for Acceleration gain,
conventional gain and Heading Lock gain. In the straight through mode set the Direct coupling to give the desired amount of
servo movement.
Heading Lock range
This limits the range of headings over which the Heading Lock gain applies. It can, if desired, be used in conjunction with the
Heading Lock Gain to limit the maximum power of the Heading Lock.
Important: Set this parameter to zero for a
'standard' (non Heading Lock) mode.
For beginners it may be useful to reduce this value to about 10 degrees for Mode 1 as
high levels of heading lock will not be needed and the maximum takeoff swing will be reduced. In most other applications use
the maximum value of 45 degrees.
HL decay time
This feature makes it possible for the SL720 to have handling characteristics that are adjustable between full Heading Lock
and fully conventional. Using Heading Lock without decay gives a helicopter no tendency to weathercock round into wind. The
shorter the Heading Lock decay time the more the gyro will respond like a conventional type and allow the helicopter to
weathercock. Thus, this feature allows you to create a full range of handling characteristics between full Heading Lock and
fully conventional. Long decay times of 60 seconds or more give flying characteristics indistinguishable from full Heading
Lock but allow the servo to gradually centre when the model is on the ground for a period and so helps to prevent 'swing' on
take-off.
For further assistance with the use of this interface, please contact
Email:
Tel (+44) 1457 854680
Website:
www.rcmodels.org/csm
Distributed World wide by
RC Models Distribution Ltd
Tel. (+44) 161 929 5955 Fax (+44) 1457 857097
Email: [email protected]
Manufactured in the UK by
CSM Design Consultancy Ltd
Software & Documentation
CSM Ltd. 2005
