![]() Windshields do bend back, but the handful of posts on forums such as this one with rollover pictures of convertibles like Spyders and Miatas show the windshield frames typically do very well as a "roll bar" It has no diagonal bracing (other than the glass itself), and no bracing, just the frame. Second, any rollover also has the same potential with the windshield bending back over the driver. While it comes up a lot, a little research shows a couple facts.įirst, rollovers on the street are very rare. Posts on this topic will inevitably bring up "mousetrapping", which is a concept that an unbraced bar can move forward and trap the passengers in the seats like a mousetrap. It works fine with the soft top and stock storage bins. I didn't add it for rollover protection, but for more bracing. But the mounting is very sturdy, unlike a lot of style bars that have no bracing at all. I have an Autopower rollbar that is structural and added a lot of stiffness and is well built, but they call it a "style bar", probably for legal reasons as it doesn't have any diagonal braces and isn't approved for racing. A roll bar is designed to enhance structural integrity and add safety in a rollover. At least that bar is approved through SCCA, so you can use it should you ever decide one day to attend an auto-x or HPDE event.Īre you looking for a "style bar" or a "roll bar"? A style bar looks like it might do something in a roll over, but probably won't, at at least nothing good. The Techno Pro-Spirits bar will not protect you during an impact or roll over.īuy the Hard Dog bar if you want a rollbar. ![]() There are no extra bars to support the main hoop, nor is there any triangulation in the design. Rollcages work by displacing the load of the impact through the many supporting bars that make up the cage, they are also reinforced through triangulating the design. I've defended many Japanese bolt in rollcages in the past, but I will not, and cannot defend the Techno Pro-Spirits roll bar. These are the same dudes (Japanese people in general) who think it's a great idea to go wheel to wheel racing with their "fuel cell" being a lawn mower fuel tank (just the bare tank, no bladder or impact protective box) relocated to where the passenger seat would be, with the battery (no box, just a bare battery with a tie down mounted to it by drilling some holes in the floor pan) relocated right next to it. Unless it's a pro race (I'm talking about ones that go by FIA regulations, and not JAF), there are damn near zero regulations governing car modifications on Japanese race tracks. Further, having a diagonal that does not triangulate the entire main hoop does not provide maximum effect, so every effort should be made to create a diagonal which resembles the one in figure 1 or the described alternate.Click to expand.That doesn't mean a thing. The intent is to triangulate the main hoop so that in the case of a roll over the structure will be stronger than one without a brace. In all cases the lateral brace will be in the place of the main hoop, and shall extend at least one half (1/2) the width of the main roll hoop, and span at least three quarters (3/4) the height of the main roll hoop. It is recognized that car construction does not always allow the attachment points of the lateral brace to be exactly in the corners as shown in figure 1. ![]() The attachment points for the diagonal lateral brace should be as close to the corners of the main roll hoop as possible, as shown in figure 1. In order to assist competitors and Scrutineers in understanding what the intent of these rules are we would like to make the following statement. It is recognized that in establishing attachment points, it may not always be possible for the points to be exactly as illustrated in the GCR diagram. The Competition Board would like to clarify the intent of the rule regarding diagonal lateral braces in the plane of the main hoop. It has been brought to the attention of the Competition Board that there have been difficulties in meeting the letter of the rule in constructing IT and Showroom Stock roll cages for cars with very limited interior space such as the Mazda Miata with a hardtop installed. Originally posted by SCCA Club Competition Board Minutes, January 7, 2003 ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |