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Old 12-11-2012, 09:59 PM
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mattc mattc is offline
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? about stability, where lights are attached to discs

we were just talking about our glow rounds on last fri. night
and when we were talking about disc selection with lights mounted
it kinda seemed like the consensus was

if the lights were mounted in the middle of the disc, it made them less stable
and if mounted more towards the outside edges they made the disc more stable

does this sound like what you have experienced?
or are we crazy, or backwards?

what do you think?
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Old 12-11-2012, 10:10 PM
Innovadude Innovadude is offline
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Makes sense with my understanding of disc flight, but in the center, on the bottom, less drag than on the top or off to one side
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Old 12-11-2012, 10:25 PM
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Mattallica Mattallica is offline
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in my experience it only slightly changes flight characteristics, that's why this time of year I leave the lights on a few of my discs all the time. I also throw my glow plastic year round.
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Old 12-12-2012, 08:41 AM
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tbird888 tbird888 is offline
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I'll agree with the less stable in the middle. I only tried out of the middle once, and my form wasn't what could be considered even half way decent at that time.
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Old 12-12-2012, 09:37 AM
agibson agibson is offline
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It would seem like mounting anywhere but in the middle is begging for OAT.
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Old 12-12-2012, 10:21 AM
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Pwingles Pwingles is offline
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Quote:
Originally Posted by agibson View Post
It would seem like mounting anywhere but in the middle is begging for OAT.
This
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Old 12-12-2012, 10:25 AM
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DiscChainBasket18 DiscChainBasket18 is offline
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Top or bottom?

Played a glow round last Friday. I stuck one of the small glow-sticks to the top (middle) of my DX Roc with some clear packing tape. I had no issues with stability & the glow-stick stayed on the disc throughout the entire round. Others in my group who had taped their mini glow-stick to the bottom (middle) of the disc had issues with moisture (dew) from the grass loosening the grip of the tape. So the tape was flapping around on the disc when they threw. This had a big affect on the flight of their discs.
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Old 12-12-2012, 10:27 AM
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less stable in the middle.
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  #9  
Old 12-12-2012, 10:37 AM
Memphis Newbie Memphis Newbie is offline
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Quote:
Originally Posted by agibson View Post
It would seem like mounting anywhere but in the middle is begging for OAT.
I agree with this (it will make the disc wobble side to side by moving the center of mass slightly to one side of the center of the disc). I also firmly disagree with the idea that mounting a light in the middle of the disc (on the underside of course) would cause it to be less stable for a couple reasons. First, anything mounted to the underside, as long as it does not protrude below the rim of the disc, is not in the aerodynamic profile of the disc and will have no effect on the aerodynamics. Second, adding weight (2 grams, plus the weight of the tape) would not destabilize the disc. The only effect this weight would have is to counteract the lift or "glide" in disc speak. It would be just more than a %1 difference in lift (glide) for a max weight disc. If the light was attached at the outer rim it would slightly add to the angular momentum (spinning inertia, or gyro effect in MVP speak). Since inertia is the tendency of an object in motion to remain in motion, increasing this inertia (or angular momentum) causes the disc to fly straighter (more resistance to turn and fade). But again, 2 grams isn't going to make a huge difference. Taping a light in the center of the disc will not really add to the angular momentum. So If you have a 170 gram Buzzz with a light taped to the underside and a 172 gram Buzzz without a light, they should fly almost identically (though the 172 gram disc w/o light would have slightly more angular momentum since a lot of those 2 extra grams would end up in the rim). Anyway, bottom line is that 2 gram lights taped to the underside center of a disc will have no perceptible effect on flight.

Last edited by Memphis Newbie; 12-12-2012 at 10:41 AM.
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  #10  
Old 12-12-2012, 11:24 AM
steve a steve a is offline
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I have found that mounting lights to the bottom of the disc will make it more understable and mounting them to the top will make them more understable but not as much as the discs with the lights on bottom. The best thing to do is find discs that fly like you want with the lights attached through experimentation before the round.
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