ORIGINAL: SManMTB
FASST receivers have a tendency to loose lock when they get hot.
Futaba now finally states that they work up to 50C (122F).
it appears there's more to the story then just this.......and keep in mind this is for a 14 channel Air receiver...not a 3 surface receiver.
Right from the 10C manual
"Product Advisory — R6014FS Receiver
Whereas many previous receivers offered a signal output of 3.0 Volts, the latest generation of ICs has been designed to operate at lower voltages in order to increase their operational speeds. The R6014FS receiver utilizes such an IC and, as such, the nominal signal output voltage of the R6014FS receiver is 2.7 Volts.
While this variance in the output voltage will not affect most equipment in use today, it has been brought to our attention that some manufacturers’ products are not capable of operation with the lower signal voltage. That is, they will not operate below 3.0 Volts. Some examples of what we have had reported thus far include
sequencers, cut-off valves, older servo designs and some recent non-Futaba digital servos.
they might not appear to initially. One such device functions perfectly on the ground and during a range check, yet when the operational temperature reaches 50°C (122°F), the device actually requires 2.8 Volts in order to function properly. As such, the servos will cease to operate properly.
Many manufacturers are updating or refining their products to ensure compatibility with the lower operational voltages. If you have any questions about the operation of such peripheral items we strongly suggest that you contact the manufacturer directly.
If you have already purchased items which can not operate below 3.0 Volts, we suggest that you either replace the item with an updated version or utilize a device to increase the voltage accordingly. There are a number of readily available devices that may be used to increase the voltage such as ElectroDynamics products, Smart-Fly’s Power Expander and Powersystem, etc.