WLToys K989/K969/284131 radio upgrade FlySky FS-GT3B with EXP, Exponential. Improve steering.
The radio on the K989 and (also on WLToys 284131) isn't great, the steering has a huge dead-spot around center position. Upgrading the radio can fix that and improve steering. We upgrade the radio with a Flysky FS-GT3B which has no dead-zone and also add features like steering EXP (exponential), throttle and steering dual rate.
This upgrade can also be used on the K969 and 284131
Links to the products mentioned:
Dumborc x6fg https://www.banggood.com/custlink/vKD...
FlySky FS-GT3B https://www.banggood.com/custlink/KDG...
20/30A Brushed ESC https://www.banggood.com/custlink/DGm...
K989: https://www.banggood.com/custlink/vKm...
K969: https://www.banggood.com/custlink/DDv...
WLToys 284131 https://www.banggood.com/custlink/KmG...
0:05 The radio problem
2:07 Which radio to use for upgrade
4:54 Wiring up the receiver and ESC
6:26 Testing: Is the steering dead zone gone?
7:03 What is steering EXP and why is it good?
10:51 Test drive: K989 vs 284131
12:29 Conclusion