Airtime for Humans in Gliding Flight
Posted: Sat Jan 30, 2016 9:58 amAirtime for Humans in Gliding Flight
During the study of airtime for humans, one will see how hang gliding plays its part. This topic thread invites a study of airtime for all sorts of hang gliding, even beyond the first-blush conventional hang gliding; that is, exercise a very broad understanding of gliding with human hanging beneath "wing" which could be as little as a helmet or fuzz on the cranium or even the skin of a bald head. Humans "hang glide" more than they realize, as they simply call the gliding by other names. Notice that gliding occurs in running, kiteboarding jumps, forward hops, falls, ski jumps, skydiving, etc. Look closely and find some calculable airtime in gliding. Notice that walking does not give airtime, as at no time are both feet off the ground resulting in no falling gliding flight (hair wing; head wing).
Notice that in a conventional hang gliding session, one might have 10 launches, short glides, and 10 landings; the airtime for the flight session is a sum of the airtime of each glide; notice that during some launches there are often multiple flights where both feet are off the ground but one foot returns for another touch-and-go; some launches are thus actually a collection of many flights. Indeed, wing running (as opposed to wing walking) that involves a long series of mini micro flights involves airtime. Wing run for a full minute and discover how much of airtime and how much groundtime is involved.
So, in a 10 second sprint of 100-yd dash on level ground, how much time is airtime and how much is groundtime; the two parts sum to 10 seconds. T=a+g Totaltime equals sum of airtime and groundtime. Have studies been made about this? A slower sprinter will have a different T and a different "a" and different "g"; say a slower dasher gets from start to finish in 20 seconds; what was that sprinter's a and g?
Wing running on true flat in calm air will have a different story than wing running in calm down a shallow slope or again down a steeper slope. Bounding wing running will have a story related to vertical propulsion of the wing runner; wing runs are a series of many hang glider flights. Have more efficient wings and watch for more airtime during wing runs. We look for motivation for masters students to study these matters; feel free to discover motivations and tell us all.
Airtime of street skateboards is found to be interesting to some; they make ramps and fly (hang glide). Etc.
Some teasing:
Ground Contact Time and Running Performance [For this topic: non-ground-contact time invites airtime.]
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Do world-class sprinters really move their legs no faster than ordinary runners?
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Tags: ground time, groundtime, airtime, air time, total time, totaltime, ground-contact time, falling time, flight time, T=a+g TAG levitation gliding flying
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Sport! Science Q&A
[Without a more efficient wing operating ... : ]
[ ] So, how long was the flight of Javier Sotomayor when he high jumped 8' and a fraction (2.45 m)? One would figure in the point his body landed after the flight onto a raised pit while noticing that his center of mass also went into flight from a distance above ambient ground; finding the exact flight time would trace center of mass flight start to center of mass at touchdown; the center of mass peak would be different from the barrier height. Finding the precise path of the center of mass would be needed for a precise answer. Making some assumptions, one could come up with a flight time. His hairs as parasol wing set might suffice enough to bring the flight into the hang gliding world. I do not have the flight time figured yet.
[ ] Open question: Is the airtime for world-record pole vaulter greater or less than the airtime for world-record running high jumper; count airtime from release of the pole to landing. These are special formats of hang gliding; consider the wing set variable: hair, clothes, ... L/D is super tiny. Sink rates are sturdy.
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Depending on what one accepts as the "wing" of the ski jumpers (say helmet ... to get "hang" gliding), there is some airtime for one of the world records:
=====================================
Conventional hang gliding, especially when soaring occurs, easily attains airtime surpassing the airtimes of many unconventional hang gliding modalities.
During the study of airtime for humans, one will see how hang gliding plays its part. This topic thread invites a study of airtime for all sorts of hang gliding, even beyond the first-blush conventional hang gliding; that is, exercise a very broad understanding of gliding with human hanging beneath "wing" which could be as little as a helmet or fuzz on the cranium or even the skin of a bald head. Humans "hang glide" more than they realize, as they simply call the gliding by other names. Notice that gliding occurs in running, kiteboarding jumps, forward hops, falls, ski jumps, skydiving, etc. Look closely and find some calculable airtime in gliding. Notice that walking does not give airtime, as at no time are both feet off the ground resulting in no falling gliding flight (hair wing; head wing).
Notice that in a conventional hang gliding session, one might have 10 launches, short glides, and 10 landings; the airtime for the flight session is a sum of the airtime of each glide; notice that during some launches there are often multiple flights where both feet are off the ground but one foot returns for another touch-and-go; some launches are thus actually a collection of many flights. Indeed, wing running (as opposed to wing walking) that involves a long series of mini micro flights involves airtime. Wing run for a full minute and discover how much of airtime and how much groundtime is involved.
So, in a 10 second sprint of 100-yd dash on level ground, how much time is airtime and how much is groundtime; the two parts sum to 10 seconds. T=a+g Totaltime equals sum of airtime and groundtime. Have studies been made about this? A slower sprinter will have a different T and a different "a" and different "g"; say a slower dasher gets from start to finish in 20 seconds; what was that sprinter's a and g?
Wing running on true flat in calm air will have a different story than wing running in calm down a shallow slope or again down a steeper slope. Bounding wing running will have a story related to vertical propulsion of the wing runner; wing runs are a series of many hang glider flights. Have more efficient wings and watch for more airtime during wing runs. We look for motivation for masters students to study these matters; feel free to discover motivations and tell us all.
Airtime of street skateboards is found to be interesting to some; they make ramps and fly (hang glide). Etc.
Some teasing:
Ground Contact Time and Running Performance [For this topic: non-ground-contact time invites airtime.]Matt Fitzgerald wrote:Ground contact time always decreases as running pace increases. If you accelerate from 6 miles/hour to 8 miles/per hour in the middle of a run, your ground contact time will decrease as your stride length increases and you spend more time airborne.
Matt Fitzgerald wrote:You are only moving forward when airborne. So the more time you spend airborne and the less time you spend on the ground, the faster you run.
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Do world-class sprinters really move their legs no faster than ordinary runners?=========================================================================================================
Tags: ground time, groundtime, airtime, air time, total time, totaltime, ground-contact time, falling time, flight time, T=a+g TAG levitation gliding flying
"more time in the air, less time on the ground"
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Sport! Science Q&A[Without a more efficient wing operating ... : ]
Sport! Science wrote: A vertical jump of four feet leads to a hang time of one second.
[ ] So, how long was the flight of Javier Sotomayor when he high jumped 8' and a fraction (2.45 m)? One would figure in the point his body landed after the flight onto a raised pit while noticing that his center of mass also went into flight from a distance above ambient ground; finding the exact flight time would trace center of mass flight start to center of mass at touchdown; the center of mass peak would be different from the barrier height. Finding the precise path of the center of mass would be needed for a precise answer. Making some assumptions, one could come up with a flight time. His hairs as parasol wing set might suffice enough to bring the flight into the hang gliding world. I do not have the flight time figured yet.
[ ] Open question: Is the airtime for world-record pole vaulter greater or less than the airtime for world-record running high jumper; count airtime from release of the pole to landing. These are special formats of hang gliding; consider the wing set variable: hair, clothes, ... L/D is super tiny. Sink rates are sturdy.
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wiki wrote:Renaud Lavillenie (French pronunciation: [ʁə.no la.vi.lə.ni] or [ʁə.no la.vil.ni]; born 18 September 1986) is a French pole vaulter. He is the current world record holder, with a height of 6.16 m (20 ft 21⁄2 in) set indoors on 15 February 2014.
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Depending on what one accepts as the "wing" of the ski jumpers (say helmet ... to get "hang" gliding), there is some airtime for one of the world records:
=====================================
Conventional hang gliding, especially when soaring occurs, easily attains airtime surpassing the airtimes of many unconventional hang gliding modalities.
