Lean angle thread

[chillo]

58 is impressive I don't think anyone has gone that low in this forum. Are you running stock perreli?

Running my favourite Metzeler Racetec RR's (didn't rate the Pirelli) still getting used to the bike as only second time on track, couple more seconds easily achievable but without a clear lap it was hard to get into a rhythm.
Only one lap at 58deg the rest mainly 55-57

 

[kismetcapitan]

it could very well be extremely accurate. But it's a gyroscope, meaning it's measuring lean angle of the bike, compared to the CENTER OF THE EARTH. If I can make it out to Indy this weekend and do a track lap, when you enter and exit the track lap, you're sitting on a banked section. Sometimes you've got to wait a second, so you're stopped. The bike in such a situation will read 0 degrees, even though relative to the actual tarmac you're at a lean.

Conversely, if this bike were to run on the Daytona 200 track, on the outer section, which is essentially a banked straight, the lean angle sensor would report the bike's lean relative to the earth, even though the bikes flat out are pretty much 90 degrees to the actual track, or at a relative "zero" degrees.

So if a bike were leaning 48 degrees relative to the tarmac, but the tarmac itself is canted a further 10 degrees relative to the center of the earth, then the gauge would read 58 degrees. Simple

 

[BTrain5489]

58deg. Lol

That leanangleometer is about like dyno results. When used as a gauge to compare yourself to yourself and track/log changes, sure...it might be a handy tool.

But like dyno results, the absolute number is almost irrelevant. No way in hell am I going to believe somebody on this forum (or any forum) hit a TRUE 58deg unless they happen to have a day job winning WSBK races on Factory machines.

I suspect that the IMU/electronics only care about relative lean angle. Consequently there is no real requirement that puts a ceiling on the error factor in the numbers displayed on the dash unlike the speedo where laws do dictate how those numbers must relate to actual speed. The lean angle display is probably just an afterthought some engineer came up with late in production.

"Hey guys, why don't we do some math/cleanup on the IMU and show the angle on the display!"
"How accurate is it?"
"Does that matter?"

A legit 50+ degrees is probably scraping the OEM footpegs and 58 is just out of the question with a stock bike.

 

[chillo]

A legit 50+ degrees is probably scraping the OEM footpegs and 58 is just out of the question with a stock bike.

I have worn out my toe slider on my new Daytona boots and yes I touched down pegs a couple of times, you dont touch the pegs down at 50 deg though!
FWIW I used to race about 15 years ago so i'm no slouch and the times i have been doing are about 5 seconds off the back of the grid in BSB superstock class which for a track day with a lot of steady riders isnt too bad!

Had some big slides until I got the tyre pressures right, ended up running 26psi rear (hot) and 31 psi front (hot)

 

[wilkson]

Can someone get a dentist to kill this thread .

 

[bradp51]

Can someone get a dentist to kill this thread .

No way it's getting better all the time
Up to 58 deg
And Jules Verne is even getting a run

 

[wilkson]

I wish I could get excited about Jules Verne . i don't know who he is

 

[wilkson]

Is he the hipster novelist ?

 

[chillo]

Appreciate by the looks of it some of you may be tired of this thread, I am new to the site and I have not read much of the previous posting here. I'm just throwing my real world findings up for members information!
My bike is a stock 1299s out the crate, the 55deg lean data from a few weeks back was on stock tyres, the recent data is with Metzeler Racetec RR's.
I'm not even trying to get daft lean angles on track, this is just some of my lap data from my track day. Yes I am a quick rider this is just what I got of the bike dda lap function. Sorry for sharing.

 

[Chaotic]

So if a bike were leaning 48 degrees relative to the tarmac, but the tarmac itself is canted a further 10 degrees relative to the center of the earth, then the gauge would read 58 degrees. Simple

That is the most logical explanation.

Rarely ever is a surface TRULY flat. It is amazing when I walk tracks and realize how much camber or elevation a corner/section has, when at speed it seems flat.

Nobody on this forum is hitting a true 55-58deg of lean angle relative to the tarmac. 58deg is max on Factory WSBK machines. Unless some of you are actually Davies or Bayliss and are posting under an alias to avoid attention, you aren't truly hitting those lean angles.

But being a gyro, I could easily see the Leanangleometer reading deviation from true vertical (as it relates to the Earth's centerline). Which means it could easily be reading an additional 5-10deg at any given time.

 

[Squidzilla]

I think we should change the title of this thread to "I hate lean angle thread" and start a new one where people can share their results.

Assuming proper body position, bike setup and safe riding techniques/styles, more lean angle helps you go faster around turns. And going fast around turns is a major appeal of riding these motorbike thingies.

I don't have a lean angle-ometer on my bike, but I think it's cool seeing what others can achieve without crashing and while being safe.

On the other hand, I also appreciate the fact that there are others on this thread that are just looking out for the well being of their fellow Panigalers. However, I think it's time to stop believing that everybody that posts about their lean angles is a squid.

To those that have lean angle measurements to contribute to this thread I say, ride safe, ride smart, and post away!

 

[Chaotic]

Where did someone call another rider a squid?

And the point we are making is that those lean angles were NOT achieved. That is the whole point. Go around T2 at TalladegaGP and lean the bike 40deg, it will likely show 60deg on the Leanangleometer because of the drastic banking of the corner.

In other words, the lean angles people are posting are useless without knowing/providing the bank angle of the pavement at that particular moment.

The ONLY use of the Leanangleometer is for one to compare their data lap after lap on the same track to compare speeds vs lean angles vs lap times and look for inconsistencies.

 

[Stw]

I think this thread has outlived its "usefulness".... Locked