RC3 usually used as Throttle, but trim was set to 1500 by default.

It should be 1000 by default.

src/modules/sensors/sensor_params.c

@@ -87,7 +87,7 @@ PARAM_DEFINE_FLOAT(RC2_REV, 1.0f);
 PARAM_DEFINE_FLOAT(RC2_DZ, 0.0f);
 
 PARAM_DEFINE_FLOAT(RC3_MIN, 1000);
-PARAM_DEFINE_FLOAT(RC3_TRIM, 1500);
+PARAM_DEFINE_FLOAT(RC3_TRIM, 1000);
 PARAM_DEFINE_FLOAT(RC3_MAX, 2000);
 PARAM_DEFINE_FLOAT(RC3_REV, 1.0f);
 PARAM_DEFINE_FLOAT(RC3_DZ, 0.0f);