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Thread: Works being undertaken at Barbagallo.

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    Staff BlackFZR's Avatar
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    Works being undertaken at Barbagallo.

    Monday a series of improvements began to be undertaken at Barbagallo. I don't know all the details of everything that is planned to be done, but a summary, and photo's of the upgrades can be seen at https://www.facebook.com/groups/ride...?ref=bookmarks.

    So far the tyre wall beyond the run-off at the entry to Turn 6 has been modified by moving the large tyres back where possible, and an additional layer of car tyres added with conveyer rubber placed across the front for some energy absorption.


    Photo courtesy of TurboR1

    More works to be completed over the weekend, although I don't know the exact details except that the next section to come under some attention is Turn 7.
    Last edited by BlackFZR; 12-01-2017 at 10:34 AM.
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    Member Thomas Peel's Avatar
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    Tim are they going to have the arrester bed material for the run off instead of the sand.
    Tp.

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    Staff BlackFZR's Avatar
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    Quote Originally Posted by Thomas Peel View Post
    Tim are they going to have the arrester bed material for the run off instead of the sand.
    Tp.
    From my understanding there is no study that shows a difference in stopping ability between sand or aggregate in arrester beds. If you are aware of otherwise, please bring it to my attention, and I can ensure that it is raised at the correct levels. The use of aggregate may be current practice for new tracks, however I doubt that during this track shutdown the intent is to replace the arrester bed materials.
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    Member Doug68's Avatar
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    Quote Originally Posted by BlackFZR View Post
    From my understanding there is no study that shows a difference in stopping ability between sand or aggregate in arrester beds.
    It's great to see the work being undertaken at the track, though its a bit sad to see the short track will be no more?
    Do you know if this is related to the DSR report at all or just the FIA requirements to allow the V8s to run?

    FYI here is a link to a study on the effectiveness of different arrester materials: LINK

    You'll note the study does not directly test sand as it is already known to be a inferior material to the pea gravel (I don't think WA is short of pea gravel?) tested as stated below:

    Gravel beds have been proven to be better than gravity ramps and sandpiles (Al-Qadi 1986). Gravel beds produce larger drag forces; therefore, they are shorter than sandpiles and gravity ramps. The effectiveness of gravel beds has been proven through their wide use. Gravel's capability to absorb energy from a rolling tire makes it the most effective material for use in runaway truck arrester beds. Also, gravel has a higher drag coefficient than sand; the drag coefficient is 0.25 g for gravel and 0.15 g for sand (Interim Guidelines 1979). Additionally, sandpiles are reported to perform poorly at speeds exceeding 50 mph (Crowe 1977).
    I'm sure that there must be plenty of other research available out there, shame its hidden away mostly, I'd be sure the FIA, FIM will have the numbers on this which'll be why they specify gravel now.
    Doug
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    Staff BlackFZR's Avatar
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    Cheers for the link Doug68 , but I can't read it as it appears to have expired. Is there a title for it, or another way to search for it?
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    Member Doug68's Avatar
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    Quote Originally Posted by BlackFZR View Post
    Cheers for the link Doug68 , but I can't read it as it appears to have expired. Is there a title for it, or another way to search for it?
    Google: "Use of Gravel Properties to Develop Arrester Bed Stopping Model"

    Its under ascelibrary.org

    Also look at page 12 of this: LINK
    Doug
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    Member SomeBloke's Avatar
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    There are loads of studies (google scholar) but many are tied up behind paywalls. There has been some good research into airplane arrestor beds from decades ago and there are a few regarding LV/HV highway arrestor beds but most don't test sand/soil, citing that due to the wildly varying properties between dry and wet. aggregates are generally more appealing simply as their properties remain quite constant across a wide range of conditions.

    - - - Updated - - -

    At first pass Doug68 the doc you link to refers to rolling resistance which is a different mechanism to how bikes/cars enter the traps. vehicle arrestor beds usually have trucks rolling straight in, not sliding or at an angle.
    "Life begins at the end of your comfort zone."

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    Member -JC-'s Avatar
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    It's awesome to see how quickly the work has progressed and the hands that have pulled together to get it this far.
    I believe that there are further works on T7 this Sunday and T1 if we can get enough helpers down to the track.
    Details on the work being done and opportunities to help out are in the Facebook page that Tim has linked above.
    Hopefully see you out there

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    Member Tron's Avatar
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    Feel free to post the full citation (title, year, journal, etc.) and I can do my best to get the articles from a university source.

    Quote Originally Posted by SomeBloke View Post
    There are loads of studies (google scholar) but many are tied up behind paywalls. There has been some good research into airplane arrestor beds from decades ago and there are a few regarding LV/HV highway arrestor beds but most don't test sand/soil, citing that due to the wildly varying properties between dry and wet. aggregates are generally more appealing simply as their properties remain quite constant across a wide range of conditions.

    - - - Updated - - -

    At first pass Doug68 the doc you link to refers to rolling resistance which is a different mechanism to how bikes/cars enter the traps. vehicle arrestor beds usually have trucks rolling straight in, not sliding or at an angle.
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    Member Joe Shabadoo's Avatar
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    i don't do facebook.
    but is this part of some sort of official remediation plan to address the deficiencies?
    I would have thought some of these questions of aggregate/sand/etc would be addressed in an overall plan

    have looked at the various websites, nothing seems to be apparent.. mwa seem to state theres no problem, wascc need to fix it up for FIA

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    Anyone else concerned about the new wall being built between the lefthander and the back straight? I know it's on the far side of the access road but I know I've made it that far after f&$king up the entry, if they put in an arrest or bed of some type it might be ok but i fear they are just planning on tyres against the wall

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    Member SomeBloke's Avatar
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    I would rather hit the wall than a bike doing 240+ on the back straight...

    As for reaching the wall, I'm sure that has been discussed and analysed. I'm not concerned with it because there are much worse areas on the track.
    "Life begins at the end of your comfort zone."

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    Member TurboR1's Avatar
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    Also here's a full lap with a drone fly-over to give a better perspective of the track and the changes in place/being made....

    Trying to think of a wise and sincere signature quote, but the only words that leap to mind are, "TITTY SPRINKLES"
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    Member TurboR1's Avatar
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    Quote Originally Posted by SomeBloke View Post
    I would rather hit the wall than a bike doing 240+ on the back straight...
    I've hit a bike on the back straight that was doing 60... I was the one doing 240+ just prior... Didn't even need to rally-x the infield to do it either.

    Not recommended.
    Trying to think of a wise and sincere signature quote, but the only words that leap to mind are, "TITTY SPRINKLES"

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    With arrestor beds is there such a thing as too much deceleration?
    You put the c*nt in country run

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    Member Tim the PM's Avatar
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    So Turbs do you now officially hold the drone lap record?

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    Member ReCon's Avatar
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    To the Layman that hasn't been to the Wanneroo area for years except to get the hell out of Dodge, what are the cleared areas that surround the track? (Maybe to the South? )

    Industrial , commercial or residential areas ??
    Sventek, being a predominantly lazy fuck can you please purchase some for me, bring me the stuff, create something I want after you think of it for me then clean my house, wash my car, dog, bike breathe for me.

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    Quote Originally Posted by TurboR1 View Post
    I've hit a bike on the back straight that was doing 60... I was the one doing 240+ just prior... Didn't even need to rally-x the infield to do it either.

    Not recommended.
    I was there that day in my first attempt at flagging , i think i`m still scarred , thanks for the memory !

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    Member TurboR1's Avatar
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    Quote Originally Posted by Cbr1k View Post
    With arrestor beds is there such a thing as too much deceleration?
    Not really... all of them will be less than a solid wall at full speed.

    - - - Updated - - -

    Quote Originally Posted by Tim the PM View Post
    So Turbs do you now officially hold the drone lap record?
    Think I cut too many corners

    - - - Updated - - -

    Quote Originally Posted by salt-rider View Post
    I was there that day in my first attempt at flagging , i think i`m still scarred , thanks for the memory !
    Yeah not my finest motorcycling moment, but my first crash on the track on only my second ever crash after 14 years.
    Trying to think of a wise and sincere signature quote, but the only words that leap to mind are, "TITTY SPRINKLES"

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    Member pnork's Avatar
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    Quote Originally Posted by TurboR1 View Post
    I've hit a bike on the back straight that was doing 60... I was the one doing 240+ just prior... Didn't even need to rally-x the infield to do it either.

    Not recommended.
    Yes, always wise to be doing 240+ in amongst group 2.. Just saying..
    Quote Originally Posted by Gippo
    cuntoxly

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