Lateral G

[bill gillespie]

Ok..just watched a video of one of Hamilton's laps in Australia...
spike of 7.8 G and sustained around 6.7......I have no words.....

[racerdad2]

The average guy passes out at 7 G's.... incredible

[bill gillespie]

The average guy passes out at 7 G's.... incredible

Positive G will cause Gloc, but I don't think lateral G in the turns keeps the heart from supplying the brain....
Not an uphill fight ?.....ANY DOCS WANT TO CHIME IN ?

[bill gillespie]

The average guy passes out at 7 G's.... incredible

Positive G will cause Gloc, but I don't think lateral G in the turns keeps the heart from supplying the brain....
Not an uphill fight ?.....ANY DOCS WANT TO CHIME IN ?

[Lotus7]

Spikes vs sustained is the key here.

For example, an F-16 fighter is computer limited to 9g sustained WITH a flight g-suit, which is all the pilot can take, although aircraft can do more.

I'd be curious to see F1 data traces this year of a longer corner such as at monza.....

[bill gillespie]

Spikes vs sustained is the key here.

For example, an F-16 fighter is computer limited to 9g sustained WITH a flight g-suit, which is all the pilot can take, although aircraft can do more.

I'd be curious to see F1 data traces this year of a longer corner such as at monza.....

Ian....the f16 driver also has a lay down seat that reduces vertical distance from heart to head....I wasn't awestruck by Hammie not passing out as much as I am speechless about the current cars lateral G capability and the drivers ability to function at that level over a race distance...

[marc sproule]

cart went to texas in -99 or -00 without prior testing.

it didn't take long for drivers to experience tunnel vision, etc

can't remember g #s but they were sustained for most of each lap,

nasa folk were called and said g-suits or not run.

event was canceled.

banking was changed later

oops

[Lotus7]

Ian....the f16 driver also has a lay down seat that reduces vertical distance from heart to head....I wasn't awestruck by Hammie not passing out as much as I am speechless about the current cars lateral G capability and the drivers ability to function at that level over a race distance...

Good point, and admittedly with no data, I'd speculate that Hammie with his feet up is potentially more laid back than an F16 jockey. Nonetheless, truly amazing.

[Jamez]

Sort of related but does anyone know the max lateral G's that you would expect to see on a well setup Formula Atlantic (in my case a Swift DB4) on a sweeping corner?

[Rick Kirchner]

The lateral g we see is not the same as the vertical g that pilots see in a race car the blood does not get pulled into your feet.

The situation at texas was more like the pilot situation. Because of the high banks there was a significant g component along the drivers spine for extended periods. That was probably low enough to be countered by the straining technique but i doubt any of them would have had the stamina to do that for the whole race.

[bill gillespie]

The lateral g we see is not the same as the vertical g that pilots see in a race car the blood does not get pulled into your feet.

The situation at texas was more like the pilot situation. Because of the high banks there was a significant g component along the drivers spine for extended periods. That was probably low enough to be countered by the straining technique but i doubt any of them would have had the stamina to do that for the whole race.

Yep...

[bill gillespie]

Sort of related but does anyone know the max lateral G's that you would expect to see on a well setup Formula Atlantic (in my case a Swift DB4) on a sweeping corner?

3ish

[phantomjock]

Caveat: not a doc, just spent a bunch of flying at hi g (6+) and got my human factors MS (as part of the bargain).

The biggest trade space between fighter aircraft and F1; ejection from aircraft - not F1 (just yet - but, just a twisted aside - why not at the salt flats?). Spine upright = less impact injury (spinal compression) on ejection. As the F1 pilot is not so equipped - a very reclined seating position can be had for lower aero cross-section and vertical g loading. Fighters (pre-Generation 5) rarely experienced horizontal g - always loaded up through the vertical axis - not in a slip around or through it.

Getting the feet up above the thighs and butt prevents pooling, but can go momentarily numb under load. Again, most useful for hi g banked corners - not hi g lateral turning.

I wasn't awestruck by Hammie not passing out as much as I am speechless about the current cars lateral G capability and the drivers ability to function at that level over a race distance...

There were remarks about the new cars performance at Barcelona, and the physical beating the drivers were taking, Hamilton's comment something like; "I like it.."

Cheers - Jim

[bill gillespie]

Caveat: not a doc, just spent a bunch of flying at hi g (6+) and got my human factors MS (as part of the bargain).

The biggest trade space between fighter aircraft and F1; ejection from aircraft - not F1 (just yet - but, just a twisted aside - why not at the salt flats?). Spine upright = less impact injury (spinal compression) on ejection. As the F1 pilot is not so equipped - a very reclined seating position can be had for lower aero cross-section and vertical g loading. Fighters (pre-Generation 5) rarely experienced horizontal g - always loaded up through the vertical axis - not in a slip around or through it.

Getting the feet up above the thighs and butt prevents pooling, but can go momentarily numb under load. Again, most useful for hi g banked corners - not hi g lateral turning.

There were remarks about the new cars performance at Barcelona, and the physical beating the drivers were taking, Hamilton's comment something like; "I like it.."

Cheers - Jim

Hey Jim......I hold the Rhino , and its drivers in high regard.......the last of the real jets that turned JP4 into noise and black smoke !

Salute,
Bill