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Building a new FPV racer i have quickly found myself tweaking the firmware and PID settings. Here are some of best bits i have found around the Eachine 250 racer.

http://wikirotors.com/index.php?title=Eachine_Racer_250

Roll: Kp 0.0034 Ki 0.0119 Kd 0.000046

Pitch: Kp 0.00454 Ki 0.01589 Kd 0.000061

Yaw: Kp 0.00794 Ki 0.01509 Kd 0.000067

These are designed for use with a 1500 mAH Lipo mounted on the lower plate. Note: these are not tuned for use with Gopro or other camera.

Previously to take down this wordpress site all you needed to do was hold down F5 for about 20 seconds then the site would take about 5 mins to recover.

There were a few factors causing this and quite a few different methods to solving the problem. Wordpress itself is run on php / apache, apache has an evasive mod which can block certain IPs depending on the defined abusive behavior (typical DDOS attack). Since i like to run a few websites behind a single IP i looked at fixing the issue closer to the perimeter….