If I came away from a crash at 200 mph with just a broken clavicle I'd be
very happy, thank you.
I have direct knowledge of the value of seat belts. I was aligning cars on
the false grid while a race was running when an MG was forced off the track
by another racer. The MG slid on gravel straight onto the end of the metal
Armco barrier. The barrier speared completely through the center of the car
and extended for 6 feet beyond its rear end. (I have photos of this)
When the dust cleared and I saw what had happened I didn't want to get any
closer. But the driver walked out, saved by the engine block that had
deflected the Armco and by his seat belts. I saw him in the control tower
later that day and he said that all he got were belt bruises.
Mark me on the anti-air bag side for race cars. There is no resemblance
between driving at racing speeds and driving on the highway, and the false
deployment of an air bag in a Cup car would be a disaster.
For some interesting reading, look at the Power Tool Institute (industry
group) comment to the CPSC petition contained in pgs. 35-69 of this file:
and pgs.1-29 of this file:
Alot of reading, some of which is legalese, but alot of food for thought.
-- Testing of a prototype Sawstop showed a very high rate of false trips
(alot of detail given in the comment)
-- The UL standard for tablesaws (UL987) is under review for addition of a
requirement for a mandatory riving knife
-- Estimated US tablesaw population is 6 million with sales of about 750k
per year. They have some back of the envelope stats that claim on a per saw
cut basis that injuries are rare. I would take that analysis with a big
grain of salt.
Personally, I think the Sawstop concept is great, but would want to see some
hard real-world data that shows it works. Even if it does, it shouldn't be
a mandated feature.
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