frkrygow said:[email hidden] wrote:
Quoted message said:Quoted message said:Frank Krygowski said:In the past, I've installed reflectors on bags. Any reflector with a
screw mount can be used that way, by poking (or hot melting) a hole
through the bag fabric. It's best if the bag has adequate stiffness
to keep the reflector pointed straight back. Use a stiffener or
washer cut from milk jug plastic, if necessary.
An optical feature that may not be obvious, is that retro-reflectors,
as most such devices for vehicles are, use trihedral reflectors,
commonly called "cube corners", (three plane surfaces oriented at 90
degrees to each other) that return incident light back to the source,
as do glass beads in Scotchlite(R). Therefore, such reflectors must
only be facing to the rear sufficiently to expose a reasonably large
projected area to incident light.
Well, they have their limits regarding angle of incidence. I've ridden
behind cylcists with LEDs and/or tri-panel reflectors pinned to
backpacks or floppy bags. The cube corners pointed way off-axis, and the
devices were useless.
This is true, and it disturbs me to see loops for mounting blinkies on all
kinds of bags and clothing. This gives a false sense of security and
encourages misuse. I see a lot of riders with blinkies clipped to their
backpacks [censored]-nilly, and they're barely visible.
Quoted message said:Quoted message said:Quoted message said:On one of my bikes, I have an LED blinky with a reflector built into
the lens clipped to the seat bag. The bag has a two-sided zipper, so
I can center the zipper opening straight behind me. The blinky has
no screw thread, but it clips nicely into that opening.
Fortunately my seat bag, a Trans-it model from Performance, has a nice
tight loop to hold my blinkie at the right angle. My blinkie is a Cateye
model that's also rated (CPSC) as a reflector. But when it's dark enough
for the reflector to be useful I have the blinkie on anyway. So while
reflectors are a good idea, you should also just buy a good blinkie and
use it.
Scotchlite tape is very effective. The heels of your shoes, the rear
faces of your cranks when they're pointing up, and the insides of your
rims are good places to put it.
DOT-type reflectors are great, but again, you need a place to mount them
properly.
Matt O.