diff --git a/libraries/SITL/SIM_FlightAxis.cpp b/libraries/SITL/SIM_FlightAxis.cpp
index 8e72a789ca..1dab6f8a5a 100644
--- a/libraries/SITL/SIM_FlightAxis.cpp
+++ b/libraries/SITL/SIM_FlightAxis.cpp
@@ -40,9 +40,19 @@ using namespace SITL;
 static const struct {
     const char *name;
     float value;
+    bool save;
 } sim_defaults[] = {
     { "AHRS_EKF_TYPE", 10 },
     { "INS_GYR_CAL", 0 },
+    { "RC1_MIN", 1000, true },
+    { "RC1_MAX", 2000, true },
+    { "RC2_MIN", 1000, true },
+    { "RC2_MAX", 2000, true },
+    { "RC3_MIN", 1000, true },
+    { "RC3_MAX", 2000, true },
+    { "RC4_MIN", 1000, true },
+    { "RC4_MAX", 2000, true },
+    { "RC2_REVERSED", 1 }, // interlink has reversed rc2
     { "SERVO1_MIN", 1000 },
     { "SERVO1_MAX", 2000 },
     { "SERVO2_MIN", 1000 },
@@ -85,6 +95,13 @@ FlightAxis::FlightAxis(const char *home_str, const char *frame_str) :
     }
     for (uint8_t i=0; i<ARRAY_SIZE(sim_defaults); i++) {
         AP_Param::set_default_by_name(sim_defaults[i].name, sim_defaults[i].value);
+        if (sim_defaults[i].save) {
+            enum ap_var_type ptype;
+            AP_Param *p = AP_Param::find(sim_defaults[i].name, &ptype);
+            if (!p->configured()) {
+                p->save();
+            }
+        }
     }
 
     /* Create the thread that will be waiting for data from FlightAxis */