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- Newsgroups: rec.motorcycles
- Path: sparky!uunet!stanford.edu!leland.Stanford.EDU!leland.stanford.edu!zowie
- From: zowie@daedalus.stanford.edu (Craig "Powderkeg" DeForest)
- Subject: Re: HELMETS
- In-Reply-To: serafin@epcot.spdc.ti.com's message of Thu, 19 Nov 1992 03:39:24 GMT
- Message-ID: <ZOWIE.92Nov18212800@daedalus.stanford.edu>
- Sender: news@leland.Stanford.EDU (Mr News)
- Organization: Stanford Center for Space Science and Astrophysics
- References: <1992Nov18.121615.3330@cs.hw.ac.uk> <1992Nov19.001059.7670@megatek.com>
- <1992Nov19.033924.25567@spdc.ti.com>
- Date: 18 Nov 92 21:28:00
- Lines: 40
-
- In article <bar> serafin@epcot.spdc.ti.com (Mike Serafin) writes:
- In article <1992Nov19.001059.7670@megatek.com> randy@megatek.com writes:
- >In article 3330@cs.hw.ac.uk, geirs@cs.hw.ac.uk (Geir Solvang) writes:
-
- >|But why on earth would anyone *NOT* wear a helmet.
-
- > Something to do with extremely low speeds, and the fact that helmets DO
- >limit your vision and hearing at those speeds. Some of us like to avoid an
- >accident in the first place, ya know.
-
- Oh horse shit! If you don't want to wear a helmet then that is your
- preference, but don't try to justify your position by arguing the same tired
- old vision and hearing theories. A helmet does not limit your forward or
- perpherial vision. DOT requires all helmets to meet a minimum p-vision of
- 105 degrees, I don't know to many folks that have p-vision beyond 90
- degrees.
-
- Can't remember the value from my bio textbook -- but, armed with a protractor
- and a wiggling index finger, I've just measured *my* peripheral vision to
- be between 85 and 90 degrees, eyes straight ahead, and 105 and 110 degrees,
- eyes turned. My helmet (here in the office) affords peripheral vision to
- roughly 95 degrees.
-
- The result is that, so long as I'm looking almost straight ahead, I hardly
- notice the helmet. But if I turn my eyes more than about 5 degrees (not very
- much), the helmet blocks my vision.
-
- Certainly, the helmet (a Shoei TF-70) blocks my vertical peripheral vision --
- I can't even see the gauges on my bike without looking down -- no matter
- where I look. This helmet is one of the *more* open full-face helmets of the
- ones I tried (incl. an RF-200); if the DOT really requires 105 degree vision,
- most helmets I've tried on should fail.
-
- Of course, half-helmets don't obstruct your vision at all!
- --
- Craig DeForest -- astrophysicist for hire.
-
- Beat Cal - Beat Cal - Beat Cal - Beat Cal - Beat Cal - Beat Cal - Beat Cal
- [sort-a mindless, eh? That's pac-10 for you.]
-
-