Another one! Thunderhill East - Turn 6 - lowside

[afm199]

My take was also missing the line, and adding throttle way too early. At that point on six, you're leaned over way too far to be energetic at all with throttle until you start to get the bike upright, which is doubly hard to do when you are running out of track due to a bad line.

Take away lean angle, add throttle.

 

[Holeshot]

Does it? Ive never been able to fully decide one way or the other. Assuming maintenance throttle, will someone's speed change as lean angle changes? Im leaning towards 'no'. The drive ratio changes proportionally to the increase in rpm - the engine has an easier time with the shorter ratio, but this only allows it to spin faster to maintain ground speed. Of course, all bets are off if you are already accelerating. Acceleration may increase with the shorter drive ratio.

There are a few corners at tracks in CA where we apply throttle and lean angle at the same time. This only works on the track because we get to practice those instances over and over and over. I know from prev laps that X amount of throttle works with my tires, suspension, conditions, etc. If I were to take a diff bike out, I'd have to adjust or risk a terrible highside.

Match the RPM with a dyno curve. RPM increases as the tire's leaned over which can equate to torque falling, depending on what RPM the bike's at. Usually it's more torque as the bike is pushed up to the fatter part of the tire.

 

[tzrider]

It depends on where the engine is in the RPM range and how positive the throttle is.

 

[ThinkFast]

If in fact he lost the rear on this one, anyone know whether traction control would’ve caught it? I’ve never ridden anything that had it, so curious about that. Seems like a good idea, on the big bikes anyways.

 

[tzrider]

If in fact he lost the rear on this one, anyone know whether traction control would’ve caught it? I’ve never ridden anything that had it, so curious about that. Seems like a good idea, on the big bikes anyways.

TC would very likely have saved this.

Before CSS went to S100RR’s, about 45% of crashes were the result of losing the rear by adding throttle and lean angle simultaneously. With TC, it’s essentially zero.

 

[Holeshot]

If in fact he lost the rear on this one, anyone know whether traction control would’ve caught it? I’ve never ridden anything that had it, so curious about that. Seems like a good idea, on the big bikes anyways.

TC has given way to the 5/ 6 axis stuff with the bank angle sensors, etc. I'm finding recommending more literbikes to riders I know for track duty due to the safety of all the new rider aids.

 

[clutchslip]

Really interesting. I know I am chum compared to the track sharks in this thread. However, I have passed (several times) and been passed by Michael Earnest using that same inside line. Thus, I don't think the line is the problem, unless the inside surface is a mess.

Edit: Another review indicates a generous use of the handlebars to turn into the corner to avoid the other bike. This may be where the issue begins. The front starts to go, which lightens the rear and then the rear loses grip. Thus we think it's the rear causing the crash when really it's the turn in on the front.

 

[On_the_DL]

Ouch, glad you're OK.