Here is the response from FMA Engineering on the FS8 range.

1) conduct range test in accordance with the "full range test" procedure in the manual. That is, use only the RX, a battery pack, and only one servo. Put the RX on a non-conductive surface approx 2 feet off the ground. Run the RX antenna up a dowel rod. Range should be at least 200 feet with TX antenna collapsed. More likely range is 300 to 600 ft.

2) If range is O.K. in the above test, but still short in the airplane, consider installation issues. Re-route antenna. If you have long extensions, consider installing our 605SB on long extension channels.

3) if problems persist, best support will be provided if you return the RX along with the TX. We will test frequency accuracy and reset JR transmitter at no charge if it is found to be off frequency. We will also check the tuning on the FS8 RX. Customer is required to pay return shipping.

Range for 50 MHz will be slightly less than 72 MHz because antennas are not as effective.