Roof options for the track?

Trackphotos · Postby **Trackphotos** » Fri May 15, 2015 12:34 am

StuwieP wrote:ballooning = smoother lines = better airflow?

That's something I'd like to know, how does the surface difference between soft top and hard top affect lap times. Really just out of curiosity, can't imagine it would be enough for someone inconsistent like me to notice.

lightyear · Postby **lightyear** » Fri May 15, 2015 7:15 am

The ballooning increases frontal area. So that would be more important than the surface texture.

Magpie · Postby **Magpie** » Fri May 15, 2015 8:04 am

However if the texture of the soft top is similar to shark skin then there maybe an argument, if you could stop it ballloooooning...

[url][url]https://www.ceisoftware.com/shark-skin-aerodynamics-at-reno/[/url][/url]

http://www.flightglobal.com/news/articles/aircraft-paint-suppliers-explore-sharkskin-coating-381646/

davekmoore · Postby **davekmoore** » Fri May 15, 2015 8:24 am

Enjoying the randomness of progress of this topic.

Before the next round the roof clamps will be properly adjusted so they both click positively closed and a separate security tether will be added, both to avoid the present tendency for the roof to open at inconvenient moments. Mind you, at a little track like Broadford it might be no slower to have the roof down?

More importantly, the oil leaking onto the exhaust needs to be dealt with to stop the smokescreen which caused me to black flag myself at Sandown last week.

Magpie · Postby **Magpie** » Fri May 15, 2015 10:00 am

http://www.miata.net/garage/latch_adjust.html

Some other suggestions for a black flag

rascal · Postby **rascal** » Fri May 15, 2015 10:12 am

Having the soft top down versus soft top up, will be slower at every track you go to, due to extra drag.

Its just the effect is less at the slower tracks. ie you might lose 2 secs per lap at Phillip Island, yet only 1/2 or 3/4 sec at Broadford or Winton short track..