diff --git a/libraries/SITL/SIM_ADSB_Sagetech_MXS.h b/libraries/SITL/SIM_ADSB_Sagetech_MXS.h
index 67e4fbda92..18eba0f4db 100644
--- a/libraries/SITL/SIM_ADSB_Sagetech_MXS.h
+++ b/libraries/SITL/SIM_ADSB_Sagetech_MXS.h
@@ -70,9 +70,9 @@ private:
     class PACKED PackedMessage {
     public:
         PackedMessage(T _msg, MsgType _msgtype, uint8_t _msgid) :
-            msg{_msg},
             msgtype{_msgtype},
-            msgid{_msgid}
+            msgid{_msgid},
+            msg{_msg}
         {
             update_checksum();
         }
diff --git a/libraries/SITL/SIM_ELRS.cpp b/libraries/SITL/SIM_ELRS.cpp
index 3136c76212..687079289b 100644
--- a/libraries/SITL/SIM_ELRS.cpp
+++ b/libraries/SITL/SIM_ELRS.cpp
@@ -22,18 +22,18 @@ using namespace SITL;
 ELRS::ELRS(const uint8_t portNumber, HALSITL::SITL_State_Common *sitl_state) :
     // Mirror typical ELRS UART buffer sizes
     SerialDevice::SerialDevice(64, 128),
-    target_address("127.0.0.1"),
-    target_port(5761 + portNumber),
     // Mirror MAVLink buffer sizes
     mavlinkInputBuffer(2048),
     mavlinkOutputBuffer(2048),
-    // Typical setup is about 500 B /s
-    input_data_rate(500),
-    output_data_rate(500),
     // 255 is typically used by the GCS, for RC override to work in ArduPilot `SYSID_MYGCS` must be set to this value (255 is the default)
     this_system_id(255),
     // Strictly this is not a valid source component ID
-    this_component_id(MAV_COMPONENT::MAV_COMP_ID_ALL)
+    this_component_id(MAV_COMPONENT::MAV_COMP_ID_ALL),
+    // Typical setup is about 500 B /s
+    input_data_rate(500),
+    output_data_rate(500),
+    target_address("127.0.0.1"),
+    target_port(5761 + portNumber)
 {
 
     // Setup TCP server
diff --git a/libraries/SITL/SIM_GPS.cpp b/libraries/SITL/SIM_GPS.cpp
index 35fe90d90a..d51521cf3b 100644
--- a/libraries/SITL/SIM_GPS.cpp
+++ b/libraries/SITL/SIM_GPS.cpp
@@ -38,9 +38,9 @@ extern const AP_HAL::HAL& hal;
 using namespace SITL;
 
 // ensure the backend we have allocated matches the one that's configured:
-GPS_Backend::GPS_Backend(GPS &_front, uint8_t _instance)
-    : front{_front},
-      instance{_instance}
+GPS_Backend::GPS_Backend(GPS &_front, uint8_t _instance) :
+    instance{_instance},
+    front{_front}
 {
     _sitl = AP::sitl();
 }
diff --git a/libraries/SITL/SIM_Motor.h b/libraries/SITL/SIM_Motor.h
index 39745b6843..720bbced87 100644
--- a/libraries/SITL/SIM_Motor.h
+++ b/libraries/SITL/SIM_Motor.h
@@ -46,9 +46,9 @@ public:
     float last_roll_value, last_pitch_value;
 
     Motor(uint8_t _servo, float _angle, float _yaw_factor, uint8_t _display_order) :
-        servo(_servo), // what servo output drives this motor
         angle(_angle), // angle in degrees from front
         yaw_factor(_yaw_factor), // positive is clockwise
+        servo(_servo), // what servo output drives this motor
         display_order(_display_order) // order for clockwise display
     {
         position.x = cosf(radians(angle));
@@ -66,9 +66,9 @@ public:
     Motor(uint8_t _servo, float _angle, float _yaw_factor, uint8_t _display_order,
           int8_t _roll_servo, float _roll_min, float _roll_max,
           int8_t _pitch_servo, float _pitch_min, float _pitch_max) :
-        servo(_servo), // what servo output drives this motor
         angle(_angle), // angle in degrees from front
         yaw_factor(_yaw_factor), // positive is clockwise
+        servo(_servo), // what servo output drives this motor
         display_order(_display_order), // order for clockwise display
         roll_servo(_roll_servo),
         roll_min(_roll_min),
diff --git a/libraries/SITL/SIM_PS_LightWare_SF45B.h b/libraries/SITL/SIM_PS_LightWare_SF45B.h
index 16fd995573..2d0404b61e 100644
--- a/libraries/SITL/SIM_PS_LightWare_SF45B.h
+++ b/libraries/SITL/SIM_PS_LightWare_SF45B.h
@@ -71,8 +71,8 @@ private:
     class PACKED PackedMessage {
     public:
         PackedMessage(T _msg, uint16_t _flags) :
-            msg(_msg),
-            flags(_flags)
+            flags(_flags),
+            msg(_msg)
         {
             flags |= (sizeof(T)) << 6;
         }
diff --git a/libraries/SITL/SIM_Sailboat.cpp b/libraries/SITL/SIM_Sailboat.cpp
index 846f077f43..a22d8c7df3 100644
--- a/libraries/SITL/SIM_Sailboat.cpp
+++ b/libraries/SITL/SIM_Sailboat.cpp
@@ -42,9 +42,9 @@ namespace SITL {
 
 Sailboat::Sailboat(const char *frame_str) :
     Aircraft(frame_str),
+    sail_area(1.0),
     steering_angle_max(35),
-    turning_circle(1.8),
-    sail_area(1.0)
+    turning_circle(1.8)
 {
     motor_connected = (strcmp(frame_str, "sailboat-motor") == 0);
     skid_steering = strstr(frame_str, "skid") != nullptr;
diff --git a/libraries/SITL/SIM_SilentWings.cpp b/libraries/SITL/SIM_SilentWings.cpp
index 424108e5ff..4ebba41e0c 100644
--- a/libraries/SITL/SIM_SilentWings.cpp
+++ b/libraries/SITL/SIM_SilentWings.cpp
@@ -57,10 +57,10 @@ SilentWings::SilentWings(const char *frame_str) :
     Aircraft(frame_str),
     last_data_time_ms(0),
     first_pkt_timestamp_ms(0),
+    inited_first_pkt_timestamp(false),
     time_base_us(0),
     sock(true),
-    home_initialized(false),
-    inited_first_pkt_timestamp(false)
+    home_initialized(false)
 {
     // Force ArduPlane to use sensor data from SilentWings as the actual state,
     // without using EKF, i.e., using "fake EKF (type 10)". Disable gyro calibration.