Cockpit construction
11-16-2011 | 10:47 PM
#71
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11-17-2011 | 01:36 AM
#72
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https://www.youtube.com/watch?v=e87HIlOIYFA
A test by the FIA Institute to find out what happens when you fire a Formula One wheel and tyre into a jet fighter canopy at 225km/h vs 30mm Polycarbonate canopy.
Interesting to see the difference and how much better the jet fighter canopy does.
A test by the FIA Institute to find out what happens when you fire a Formula One wheel and tyre into a jet fighter canopy at 225km/h vs 30mm Polycarbonate canopy.
Interesting to see the difference and how much better the jet fighter canopy does.
Was it the top cut out of the 1st test canopy causing it to fail? Looking at it in slow mo it appears it took the intial brunt and then failed at the cut line and cracked back toward the front.
Why would they not conduct that test using identical shaped canopies?
Why would they not conduct that test using identical shaped canopies?
11-17-2011 | 04:19 AM
#73
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From: Turku, Finland
A diver is a rescuer/paramedic not one giving first aid (=operators of the boat mainly).
Therefore IMO a capsule is needed the windshield and canopy supported by a rollcage and beams like in Racecars so the polycarb can't cave in by itself but is supported from the inside.
Regarding Class1.. the measures taken in 2010 is almost nil by the organization.
Thenagain it's not forbidden to have more safety devices in personal gear and your equipment than needed
There has been cases where a safety capsule has even saved a raceboat from sinking and saving the occupants from drowning. Ocean Spray Scarab was one if memory serves correct.
Add personal safety gear to all this and we're heading somewhere.
Last edited by MikeyFIN; 11-17-2011 at 04:27 AM.
11-17-2011 | 05:11 AM
#74
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From: Turku, Finland
Post moved from Warpaint Crash pics thread :
25G peaks is a moderate deceleration in my book but we all have different references. It's certainly not peanuts anyway!
If you hit a flat wall with a modern car at 35 mph you will experience peaks of around 40G in the car. Depending on what car you drive, you would walk away without serious injury. This is with a normal 3 point seat belt and airbag.
In car racing peaks of over 60g is not uncommon.
That is why I regard boat crashes as "moderate" in terms of G-force.
However, not only peak G's are interesting when it comes to crashes. Since we are dealing with the human body, duration and the shape of the crash pulse are important factors. They are also factors where race boat crashes differ from most other crashes. But I will not bore you with details.
25G peaks is a moderate deceleration in my book but we all have different references. It's certainly not peanuts anyway!
If you hit a flat wall with a modern car at 35 mph you will experience peaks of around 40G in the car. Depending on what car you drive, you would walk away without serious injury. This is with a normal 3 point seat belt and airbag.
In car racing peaks of over 60g is not uncommon.
That is why I regard boat crashes as "moderate" in terms of G-force.
However, not only peak G's are interesting when it comes to crashes. Since we are dealing with the human body, duration and the shape of the crash pulse are important factors. They are also factors where race boat crashes differ from most other crashes. But I will not bore you with details.
The Keyword here is the Airbag which takes down the G's considerably. 25 G's is enough to rip your innards away given enough time of the impact and make your eyes red and ears leak blood too.
Think the G's a boxers head or body takes.
Theres been broken skulls and split livers in that sport many moons.
Thenagain Danny Ongais survived a 179G crash... but anything double digits is enough for me or so I would think, I do not know what I have dealt with sofar in my life.
Let me rephrase my question:
Are basilar skull fractures a common problem in offshore racing when using safety cockpits and seatbelts?
I suspect that your examples are from open boats? There are may ways to get a basilar scull fracture but a HANS device will only protect from the high G, heavy helmet type.
Are basilar skull fractures a common problem in offshore racing when using safety cockpits and seatbelts?
I suspect that your examples are from open boats? There are may ways to get a basilar scull fracture but a HANS device will only protect from the high G, heavy helmet type.
That's good. From what I hear, swimming with a HANS is OK too.
Last edited by MikeyFIN; 11-17-2011 at 05:14 AM.
11-17-2011 | 09:01 AM
#75
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The Keyword here is the Airbag which takes down the G's considerably. 25 G's is enough to rip your innards away given enough time of the impact and make your eyes red and ears leak blood too.
Think the G's a boxers head or body takes.
Theres been broken skulls and split livers in that sport many moons.
Thenagain Danny Ongais survived a 179G crash... but anything double digits is enough for me or so I would think, I do not know what I have dealt with sofar in my life.
Think the G's a boxers head or body takes.
Theres been broken skulls and split livers in that sport many moons.
Thenagain Danny Ongais survived a 179G crash... but anything double digits is enough for me or so I would think, I do not know what I have dealt with sofar in my life.
60 G in the head and 50 G in the chest are acceptable values in the crash safety industry.
11-17-2011 | 08:51 PM
#78
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From: toledo oh
that outer surface is a full mask they had done to close up the window area of the factory Skater windshields. They all blew out when the boat went over in Ocean City, Jimmy and Vinny are very lucky. Those ribs are not part of the canopy but part of the mask in an attempt to add some more ridgidity. I think they may also have been designed to break laminar flow in the event of a roll.
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Last edited by glassdave; 11-17-2011 at 09:09 PM.
11-17-2011 | 10:05 PM
#80
Neno the mind boggler
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From: toledo oh
the water at speed wants to follow a curved surface. Think hook and rocker on the bottom of a boat. It can be a very destructive force on a boat that has flipped or stuffed, it can pull hatches open, blow panels out etc . . .
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Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
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10 OPA Class 1 National Champion ( happy now Ed! )
Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
