Just a small thing I noticed while I was testing the angular velocity of outward and inward drifting vehicles, mostly relevant for the 200cc class. When looking at the trails left by the wheels in the icy part of GCN Sherbet Land, it can be noticed that outward drifting vehicles form a spiraling trail that gradually narrows until it becomes a circle, while inward drifting vehicles form a circle, with a little indentation in the point where the Super Mini-Turbo is charged. To understand what the origin of the spiraling trail was, the angular velocity while the trail was still a spiral was measured. The reason is simple: when going in a circular path, the radius of curvature, r, can be expressed as v / ω, where ω is the angular velocity while v is the speed of the vehicle. If a spiral trail whose radius decreases over time is formed, it means that either angular velocity is increasing or the speed of the vehicle is decreasing. The test is the following: And as a reference point a small polygonal shape in the ice was used: In this image the shape used as reference is right behind the rear wheel. The resulting time needed to reach that shape again was measured in four consecutive circles, the first one starting from the first time the shape was met, on frame 5492 of the video. Here are the measured times: 1st circle: 245 frames 2nd circle: 245 frames 3rd circle: 246 frames 4th circle: 245 frames Therefore, the angular velocity isn't significantly affected, meaning that the reason why the the spiraling trails are formed is that outward drifting vehicles gradually reach a lower speed while drifting. It's important to point out that this doesn't happen with inward drifting bikes, meaning that they don't gradually reach a lower speed while drifting. Indeed, angular velocity was measured also in the case of inward drifting bikes using as refrence point the frame where the ice tower on the left of the ice arc disappeared. The reference point for inward drifting bikes. The resulting time needed to reach that reference point was measured in four consecutive circles, the first one being measured from the first time the reference point was met, on frame 13342 of the video (shown above to illustrate the reference point). Here are the measured times: 1st circle: 263 frames 2nd circle: 262 frames 3rd circle: 263 frames 4th circle: 263 frames Therefore, angular velocity doesn't change with time also with inward drifting vehicles. Since the trails left by the wheels form circles, the radius of curvature doesn't change as well and as a consequence, the speed of the bikes stays constant when they drift. Finally, a last interesting aspect was studied: what happens when the outward drifting vehicles start drifting with a speed lower than the lowest speed reached when drifting? This video clarifies what happens: Simply put, the outward drifting vehicle gradually accelerates until it reaches this lowest speed while drifting, meaning that this lowest speed acts as an asymptote and makes the vehicle reach a lower top speed than the one it would reach if it was going straight and it was not drifting. So, as take-home message, outward drifting vehicles gradually reach a lower speed while drifting, while inward drifting bikes maintain their speed while drifting after losing a smaller amount soon after drifting begins. Furthermore, this lower speed while drifting acts as top speed for the vehicles that are drifting while still accelerating, causing them to reach a lower top speed than the one they would reach if they were going straight and weren't drifting. MODEL BASED ON RESULTS OF NEW EXPERIMENTS With new experiments performed, it was possible to create a new model to explain what happens when drifting: When starting with a sharp drift from top speed (i.e. when tilting the control stick or pressing the directional buttons in the direction of the turn), the vehicle quckly loses speed; judging by the traisl left by inward drifting bikes, this loss seems to fully happen even before the Super Mini-Turbo is charged, so before 2 seconds have passed. This loss is: around 2% of top speed for 45° softdrifts (those obtained with the D-Pad) around 8% of top speed for sharpest drifts furthermore, after reaching this lower speed, outward drifting vehicles gradually lose an additional amount of speed: around 1% of top speed for 45° softdrifts (those obtained with the D-Pad) around 4% of top speed for sharpest drifts when starting with a neutral or widened drift from top speed, the vehicle doesn't lose any amount of speed. However, if from that situation the drift is sharpened (i.e. the player is tilting the control stick or pressing the directional buttons in the direction of the turn), the vehicle gradually reaches the minimum speed corresponding to the drifting angle (e.g. with sharpest drifts, 92% of top speed for inward drifting bikes and 88% of top speed for outward drifting vehicles). Inward drifting bikes reach this minimum speed a little earlier than outward drifting vehicles, but due to the higher speed while drifting this doesn't necessarily result in a quicker speed loss in the case of inward drifting bikes.