1 ![INAV 5 Ballistic Buzzard](https://quadmeup.com/assets/inav_5_buzzard.png)
3 # Hello and welcome to INAV 5.1 "Ballistic Buzzard"
5 Please carefully read all of this document for the best possible experience and safety.
7 Get in touch with other pilots, share experiences, suggestions and ask for help on:
12 <td><img width="48" src="https://discord.com/assets/f9bb9c4af2b9c32a2c5ee0014661546d.png"></td>
13 <td><a href="https://discord.gg/peg2hhbYwN" target="_blank">INAV Discord Server</a></td>
16 <td><img src="https://upload.wikimedia.org/wikipedia/commons/c/cd/Facebook_logo_%28square%29.png" width="48"></td>
17 <td><a href="https://www.facebook.com/groups/INAVOfficial">INAV Official on Facebook</a></td>
22 Please continue to support developers, for free, by checking out the following stores after having clicked on the following links:
27 <td><img src="https://lh3.googleusercontent.com/TiHXyUiZ2COk7OmceBgo1qeRN2APAjWL5qUydGc-U3LqkJb3n13EhYEJ8Dpz_IACNHU" width="55"></td>
28 <td><a href="https://inavflight.com/shop/u/bg">Support us on Banggood</a></td>
33 Your contribution from the past month has been very welcome! Thanks!
35 Tested and suggested hardware can be found [here](https://github.com/iNavFlight/inav/wiki/Welcome-to-INAV,-useful-links-and-products)
39 ## Config wipe mitigation
41 INAV 5.1 lowers the probablity of a full config wipe on reboot. Bear in mind, technically it's not a bug. When FC is disconnected during EEPROM write, checksum will not updated and INAV will erase flash on next boot as a safety measure. To prevent this from happening, always wait until INAV fully reboots before disconnecting the flight controller.
43 ## Mamba H743 and ZEEZF7 V2 external flash
45 INAV 5.1 supports 128Mbit W25N01G flash memory that can be found on Mamba H743 and ZEEZF7 V2.
47 ## Horizon Drift mitigation
49 To improve AHI drift on fixed wings, apply following settings via CLI:
51 ### For airplanes without a tail (wings, delta, etc)
53 set imu_acc_ignore_rate = 9
54 set imu_acc_ignore_slope = 5
55 set nav_fw_pos_z_p = 35
56 set nav_fw_pos_z_i = 5
57 set nav_fw_pos_z_d = 10
58 set nav_fw_pos_xy_p = 70
63 ### For airplanes with a tail (dedicated elevator)
65 set imu_acc_ignore_rate = 7
66 set imu_acc_ignore_slope = 4
67 set nav_fw_pos_z_p = 25
68 set nav_fw_pos_z_i = 5
69 set nav_fw_pos_z_d = 7
70 set nav_fw_pos_xy_p = 55
75 # Upgrading from a previous release
77 ## Upgrading from INAV 5
79 0. Download and install the new [configurator](https://github.com/iNavFlight/inav-configurator/releases)
80 1. Save to a file the current _diff all_ from the CLI.
81 2. Upgrade to INAV 5.1 using the Full Erase option in the configurator.
82 3. Upload your OSD font of choice from the OSD tab.
83 4. Go to the CLI again and paste the above-described contents from the file you previously created and write _save_ , press ENTER.
84 6. You should be ready, explore new 5.1 features, and enjoy!
86 ## Upgrading from older versions
88 Please follow the instructions on [this](https://github.com/iNavFlight/inav/wiki/Upgrading-from-an-older-version-of-INAV-to-the-current-version) page.
97 * iFlight Blitz F7 Pro
103 * `nav_fw_launch_abort_deadband` Launch abort stick deadband in [r/c points], applied after r/c deadband and expo. The Roll/Pitch stick needs to be deflected beyond this deadband to abort the launch.
106 * Do not automatically persist the gyro calibration by @DzikuVx in https://github.com/iNavFlight/inav/pull/8216
107 * Add PINIO support to Matek F405 SE by @MrD-RC in https://github.com/iNavFlight/inav/pull/8256
108 * Make programming framework CLI safe by @MrD-RC in https://github.com/iNavFlight/inav/pull/8266
109 * Fix esc temperature sensor maxing out by @MrD-RC in https://github.com/iNavFlight/inav/pull/8299
110 * Speedybee F7 V3 by @DzikuVx in https://github.com/iNavFlight/inav/pull/8317
111 * AtomRC F405 NAVI target by @DzikuVx in https://github.com/iNavFlight/inav/pull/8321
112 * iFlight BLITZF7PRO target by @nmaggioni in https://github.com/iNavFlight/inav/pull/8335
113 * iFlight JBF7PRO target by @nmaggioni in https://github.com/iNavFlight/inav/pull/8334
116 **Full Changelog**: https://github.com/iNavFlight/inav/compare/5.0.0...5.1.0
118 The full list of changes is available [here](https://github.com/iNavFlight/inav/pulls?q=is%3Apr+milestone%3A5.1+is%3Aclosed)
120 The full list of INAV Configurator changes is available [here](https://github.com/iNavFlight/inav-configurator/pulls?q=is%3Apr+milestone%3A5.1+is%3Aclosed)