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I feel it is worth my time to describe our incident on SS10. I can only hope that this story will help to show the importance of proper triangle placement...
We were screaming along at the beginning of SS10 trying to solidify our 2nd place in class. A fast section lead us to a R4 into 3L. It is amazing how fast it can all go wrong. I wasn't really sure what had happened until I viewed my in-car tape on the way home last night. We were FULLY committed to the R4 with the plan of snapping it into the L3. As we hit the apex of the R4 there was a spectator(?) on the right holding an OK sign and one triangle. I lifted, hesitated, and then saw the yellow car off on the outside of the L3. The lift and the hesitation meant my timing was wrong for the line I was originally committed to, but I had to do something. I snapped it to the left anyway and just STOOD ON IT in an attempt to dig away from the yellow car. Unfortunately, the 32 mm pin hole that we breath through made sure that we didn't have the power to dig fast enough. We impacted the yellow car's LR corner with Adrian's door smack dab in the middle. The weakest vertical surface on any car. The drivers of the yellow car stood up, their eyes as big as can be. That was the good news, because they were on the other side of the car, digging out.
With the other crew apparently OK, we restarted, put it in first and continued. Adrian noticed that the door cross bars on his side were cracked so we finished it out at a moderate speed.
This was the second time through this piece of road. The first time through, another car had gone off in a similar manner to the yellow car. The L3 was very loose. The section leading to the R4 was very fast. We are required to carry 3 triangles. Each "off" is different but the placement of triangles must be done with the safety of everyone in mind and not in the interest in getting the car out as fast as possible.
In hindsight, the first triangle should have been on driver's right about 50 before the R4. The second triangle should have been on driver's right at the turn-in point of the R4. The third triangle should have been about 10 before the car. The OK sign should have been on the rear of the car.
What could have happened? The crew of the yellow car could have been crushed. Adrian's side of the car could have collapsed.
If we are going to loose second in class, I want to make sure it is worth it and we all learn something from this near disaster.
Bruce Perry
Adrian Wintle
#992 PGT/P4 Talon
PS. We learned a little something about cage construction as well. The welds did NOT break. The door protection in my cage consists of a horizontal sill bar, a continuous diagonal cross bar and a non-continuous cross bar to form an X in the door openning. The impact was centered about 3 inches above the center of the X. The CONTINUOUS diagonal bar failed, not the welded, non-continuous bar welds. The "heat affected zone" next to the welds failed in tension. The cage did it's job admirable, however, there is an improvement that I will make before the next event. All welded joints in that area of the car that would see a tensile load will be covered by a gusset/plate that will increase the tensile strength of that joint. While the X design looks good, the reality of it is that the very center of the X is only one tube with a heat affected zone almost all the way around it! NOT GOOD ENOUGH!!!
We were screaming along at the beginning of SS10 trying to solidify our 2nd place in class. A fast section lead us to a R4 into 3L. It is amazing how fast it can all go wrong. I wasn't really sure what had happened until I viewed my in-car tape on the way home last night. We were FULLY committed to the R4 with the plan of snapping it into the L3. As we hit the apex of the R4 there was a spectator(?) on the right holding an OK sign and one triangle. I lifted, hesitated, and then saw the yellow car off on the outside of the L3. The lift and the hesitation meant my timing was wrong for the line I was originally committed to, but I had to do something. I snapped it to the left anyway and just STOOD ON IT in an attempt to dig away from the yellow car. Unfortunately, the 32 mm pin hole that we breath through made sure that we didn't have the power to dig fast enough. We impacted the yellow car's LR corner with Adrian's door smack dab in the middle. The weakest vertical surface on any car. The drivers of the yellow car stood up, their eyes as big as can be. That was the good news, because they were on the other side of the car, digging out.
With the other crew apparently OK, we restarted, put it in first and continued. Adrian noticed that the door cross bars on his side were cracked so we finished it out at a moderate speed.
This was the second time through this piece of road. The first time through, another car had gone off in a similar manner to the yellow car. The L3 was very loose. The section leading to the R4 was very fast. We are required to carry 3 triangles. Each "off" is different but the placement of triangles must be done with the safety of everyone in mind and not in the interest in getting the car out as fast as possible.
In hindsight, the first triangle should have been on driver's right about 50 before the R4. The second triangle should have been on driver's right at the turn-in point of the R4. The third triangle should have been about 10 before the car. The OK sign should have been on the rear of the car.
What could have happened? The crew of the yellow car could have been crushed. Adrian's side of the car could have collapsed.
If we are going to loose second in class, I want to make sure it is worth it and we all learn something from this near disaster.
Bruce Perry
Adrian Wintle
#992 PGT/P4 Talon
PS. We learned a little something about cage construction as well. The welds did NOT break. The door protection in my cage consists of a horizontal sill bar, a continuous diagonal cross bar and a non-continuous cross bar to form an X in the door openning. The impact was centered about 3 inches above the center of the X. The CONTINUOUS diagonal bar failed, not the welded, non-continuous bar welds. The "heat affected zone" next to the welds failed in tension. The cage did it's job admirable, however, there is an improvement that I will make before the next event. All welded joints in that area of the car that would see a tensile load will be covered by a gusset/plate that will increase the tensile strength of that joint. While the X design looks good, the reality of it is that the very center of the X is only one tube with a heat affected zone almost all the way around it! NOT GOOD ENOUGH!!!