diff --git a/latencyTesting/startTxAndRxOnMyPc.sh b/latencyTesting/startTxAndRxOnMyPc.sh
index a48d9d2b..dd760d29 100755
--- a/latencyTesting/startTxAndRxOnMyPc.sh
+++ b/latencyTesting/startTxAndRxOnMyPc.sh
@@ -39,9 +39,9 @@ sudo iwconfig $MY_RX channel 6
 
 
 # $WFB_FOLDER/wfb_tx -k $FEC_K -n $FEC_N -u 6000 -p 60 -M 7 -K $WFB_FOLDER/drone.key $MY_TX
-xterm -hold -e $WFB_FOLDER/wfb_tx -k $FEC_K -n $FEC_N -u 6000 -p 60 -M 4 -B 40 -K $WFB_FOLDER/drone.key -f 5 $MY_TX &
+xterm -hold -e $WFB_FOLDER/wfb_tx -k $FEC_K -n $FEC_N -u 6000 -p 60 -M 4 -B 40 -K $WFB_FOLDER/drone.key $MY_TX &
 
-$WFB_FOLDER/wfb_rx -k $FEC_K -n $FEC_N -c 127.0.0.1 -u 6100 -p 60 -K $WFB_FOLDER/gs.key -f 10 $MY_RX
+$WFB_FOLDER/wfb_rx -k $FEC_K -n $FEC_N -c 127.0.0.1 -u 6100 -p 60 -K $WFB_FOLDER/gs.key $MY_RX
 
 #other usefull commands:
 #sudo iw dev
diff --git a/src/rx.cpp b/src/rx.cpp
index 728f3f6f..f4def227 100644
--- a/src/rx.cpp
+++ b/src/rx.cpp
@@ -386,7 +386,7 @@ radio_loop(std::shared_ptr<Aggregator> agg,const std::vector<std::string> rxInte
     for (;;) {
         auto cur_ts=std::chrono::steady_clock::now();
         //const int timeoutMS=log_send_ts > cur_ts ? (int)std::chrono::duration_cast<std::chrono::milliseconds>(log_send_ts - cur_ts).count() : 0;
-        const int timeoutMS=std::chrono::duration_cast<std::chrono::milliseconds>(flush_interval).count();
+        const int timeoutMS=flush_interval.count()>0 ? std::chrono::duration_cast<std::chrono::milliseconds>(flush_interval).count() : std::chrono::duration_cast<std::chrono::milliseconds>(log_interval).count();
         int rc = poll(fds, N_RECEIVERS,timeoutMS);
 
         if (rc < 0) {
@@ -403,7 +403,9 @@ radio_loop(std::shared_ptr<Aggregator> agg,const std::vector<std::string> rxInte
 
         if (rc == 0){
             // timeout expired
-            agg->flushRxRing();
+            if(flush_interval.count()>0){
+                agg->flushRxRing();
+            }
             continue;
         }
 
@@ -424,7 +426,7 @@ int main(int argc, char *const *argv) {
     int opt;
     uint8_t k = 8, n = 12, radio_port = 1;
     std::chrono::milliseconds log_interval{1000};
-    std::chrono::milliseconds flush_interval{40};
+    std::chrono::milliseconds flush_interval{-1};
     int client_udp_port = 5600;
     std::string client_addr = "127.0.0.1";
     std::string keypair = "gs.key";
diff --git a/src/tx.cpp b/src/tx.cpp
index 3f4433c7..3ed5ba42 100644
--- a/src/tx.cpp
+++ b/src/tx.cpp
@@ -54,7 +54,11 @@ WBTransmitter::WBTransmitter(RadiotapHeader radiotapHeader, int k, int n, const
     }
     mEncryptor.makeSessionKey();
     outputDataCallback=std::bind(&WBTransmitter::sendFecBlock, this, std::placeholders::_1);
-    mInputSocket=SocketHelper::openUdpSocketForRx(udp_port,flushInterval);
+    if(FLUSH_INTERVAL.count()<0){
+        mInputSocket=SocketHelper::openUdpSocketForRx(udp_port,LOG_INTERVAL);
+    }else{
+        mInputSocket=SocketHelper::openUdpSocketForRx(udp_port,FLUSH_INTERVAL);
+    }
     fprintf(stderr, "WB-TX Listen on UDP Port %d assigned ID %d assigned WLAN %s FLUSH_INTERVAL(ms) %d\n", udp_port,radio_port,wlan.c_str(),(int)flushInterval.count());
 }
 
@@ -141,7 +145,9 @@ void WBTransmitter::loop() {
         }else{
             if(errno==EAGAIN || errno==EWOULDBLOCK){
                 // timeout
-                finishCurrentBlock();
+                if(FLUSH_INTERVAL.count()>0){
+                    finishCurrentBlock();
+                }
                 continue;
             }
             if (errno == EINTR){
@@ -158,7 +164,8 @@ int main(int argc, char *const *argv) {
     int opt;
     uint8_t k = 8, n = 12, radio_port = 1;
     int udp_port = 5600;
-    std::chrono::milliseconds flushInterval=std::chrono::milliseconds(40);
+    // use -1 for no flush interval
+    std::chrono::milliseconds flushInterval=std::chrono::milliseconds(-1);
 
     RadiotapHeader::UserSelectableParams params{20, false, 0, false, 1};
 
diff --git a/src/tx.hpp b/src/tx.hpp
index 33111095..2e6c2ae1 100644
--- a/src/tx.hpp
+++ b/src/tx.hpp
@@ -72,6 +72,7 @@ class WBTransmitter: public FECEncoder{
     int64_t nInjectedPackets=0;
     const std::chrono::steady_clock::time_point INIT_TIME=std::chrono::steady_clock::now();
     static constexpr const std::chrono::nanoseconds LOG_INTERVAL=std::chrono::milliseconds(1000);
+    // use -1 for no flush interval
     const std::chrono::milliseconds FLUSH_INTERVAL;
     Chronometer pcapInjectionTime{"PcapInjectionTime"};
 public: