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Plane: small improvement to takeoff docs

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Andrew Tridgell 2014-11-13 14:24:37 +11:00
parent 135f9b2c54
commit 3813bcb7ce
1 changed files with 4 additions and 4 deletions
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8
ArduPlane/Parameters.pde
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@ -145,7 +145,7 @@ const AP_Param::Info var_info[] PROGMEM = {
// @Param: TKOFF_THR_MINSPD
// @DisplayName: Takeoff throttle min speed
// @Description: Minimum GPS ground speed in m/s used by the speed check that un-suppresses throttle in auto-takeoff. This can be be used for catapult launches where you want the motor to engage only after the plane leaves the catapult, but it is preferable to use the TKOFF_THR_MINACC and TKOFF_THR_DELAY parameters for cvatapult launches due to the errors associated with GPS measurements. For hand launches with a pusher prop it is strongly advised that this parameter be set to a value no less than 4 m/s to provide additional protection against premature motor start. Note that the GPS velocity will lag the real velocity by about 0.5 seconds. The ground speed check is delayed by the TKOFF_THR_DELAY parameter.
// @Description: Minimum GPS ground speed in m/s used by the speed check that un-suppresses throttle in auto-takeoff. This can be be used for catapult launches where you want the motor to engage only after the plane leaves the catapult, but it is preferable to use the TKOFF_THR_MINACC and TKOFF_THR_DELAY parameters for catapult launches due to the errors associated with GPS measurements. For hand launches with a pusher prop it is strongly advised that this parameter be set to a value no less than 4 m/s to provide additional protection against premature motor start. Note that the GPS velocity will lag the real velocity by about 0.5 seconds. The ground speed check is delayed by the TKOFF_THR_DELAY parameter.
// @Units: m/s
// @Range: 0 30
// @Increment: 0.1
@ -154,7 +154,7 @@ const AP_Param::Info var_info[] PROGMEM = {
// @Param: TKOFF_THR_MINACC
// @DisplayName: Takeoff throttle min acceleration
// @Description: Minimum forward acceleration in m/s/s before arming the ground speed check in auto-takeoff. This is meant to be used for hand launches. Setting this value to 0 disables the acceleration test which means the ground speed check will always be armed which could allow GPS velocity jumps to start the engine. For hand launches this should be set to 15.
// @Description: Minimum forward acceleration in m/s/s before arming the ground speed check in auto-takeoff. This is meant to be used for hand launches. Setting this value to 0 disables the acceleration test which means the ground speed check will always be armed which could allow GPS velocity jumps to start the engine. For hand launches and bungee launches this should be set to around 15.
// @Units: m/s/s
// @Range: 0 30
// @Increment: 0.1
@ -163,9 +163,9 @@ const AP_Param::Info var_info[] PROGMEM = {
// @Param: TKOFF_THR_DELAY
// @DisplayName: Takeoff throttle delay
// @Description: This parameter sets the time delay (in 1/10ths of a second) that the ground speed check is delayed after the forward acceleration check controlled by TKOFF_THR_MINACC has passed. For hand launches with pusher propellers it is essential that this is set to a value of no less than 2 (0.2 seconds) to ensure that the aircraft is safely clear of the throwers arm before the motor can start.
// @Description: This parameter sets the time delay (in 1/10ths of a second) that the ground speed check is delayed after the forward acceleration check controlled by TKOFF_THR_MINACC has passed. For hand launches with pusher propellers it is essential that this is set to a value of no less than 2 (0.2 seconds) to ensure that the aircraft is safely clear of the throwers arm before the motor can start. For bungee launches a larger value can be used (such as 30) to give time for the bungee to release from the aircraft before the motor is started.
// @Units: 0.1 seconds
// @Range: 0 15
// @Range: 0 127
// @Increment: 1
// @User: User
GSCALAR(takeoff_throttle_delay, "TKOFF_THR_DELAY", 2),