Cypher/FirmWareUpdate426

Changelog for Firmware 4.2.6 R1 including SRXL2

Since Mid-October 2021, all Cyphers shipping from Flex in the USA come with FW4.2.6 installed and set as noted.

Moves to Betaflight 4.2.6 platform

SRXL2 Cable (FPZA1039)
Continues support for select Spektrum SRXL2 Receivers with telemetry and full range reception with diversity: (Adapter Cable Required for ALL of these: FPZA1039). Other receivers are NOT expected to work as they require negotiation for data and Horizon wrote the Betaflight SRXL2 Code which does NOT negotiate.
- SPM4651 - Full Range Telemetry, Micro with Case, with Connector, Highest Recommended by Flex
- SPM4650 - Short Range Telemetry, Micro, Requires soldering cable or connector. (can eliminate micro connector)
- SPM4650C - Short Range Telemetry, Micro, with Connector
Defaults to Spektrum SRXL2 serial receiver type and Telemetry ON upon flash/out of box

SRXL2 Cable with a Flight Controller)
Includes all 4.2.0 improvements.
Includes improvements including Elevator/Fan Pitch Compensation for smoother transitions to a hover mode from flight at a broad range of airspeeds.
Settings are tweaked for better yaw authority/response in hover modes.
Flex pilots have tested the AIRMODE feature whose selection slider is found on the Configuration screen. They found that the control in hover modes is stronger, and behavior on the ground in hover modes is less care-free, but still good. After testing the normal settings in FW4.2.6, expert pilots may want to give AIRMODE a try! (Set slider ON and Save and Reboot)