Scotteo Posted October 11, 2012 Share Posted October 11, 2012 I still maintain that there will be no boom though Link to comment Share on other sites More sharing options...
Albert Tatlock Posted October 11, 2012 Share Posted October 11, 2012 You need air to produce a sonic boom. For the first part of his fall there is not much air up there, but, he will eventually be meeting enough air at some stage to suddenly build up to and produce a sonic boom. Problem is, he only has a suit, so the sonic boom could technically: knock him out, knock him senseless or he could lose control and spin wildly etc. Very dangerous stuff indeed. Most people have an aircraft/spacecraft around them to protect them when they produce a sonic boom. Anything going through any air faster than sound will produce a sonic boom...including Felix. Link to comment Share on other sites More sharing options...
Scotteo Posted October 11, 2012 Share Posted October 11, 2012 You need air to produce a sonic boom. For the first part of his fall there is not much air up there, but, he will eventually be meeting enough air at some stage to suddenly build up to and produce a sonic boom. Problem is, he only has a suit, so the sonic boom could technically: knock him out, knock him senseless or he could lose control and spin wildly etc. Perhaps, but it was my understanding that the drogue parachute would deploy before the air pressure gets too great and he'll gradually fall below mach - way before the shock waves become strong enough to cause such an imbalance. Anything going through any air faster than sound will produce a sonic boom...including Felix. Not true, an aircraft travelling fast enough (and high enough) would eventually have a sonic wave angle of zero whereby the air reverts to "clinging" onto the aircraft. (tried and failed to find the source for this - will keep trying though) Edit: Cited in here http://asadl.org/jasa/resource/1/jasman/v51/i2C/p686_s1?isAuthorized=no, sadly not free though Link to comment Share on other sites More sharing options...
slinkydevil Posted October 11, 2012 Share Posted October 11, 2012 It's pretty impressive that Joseph Kettinger was doing a similar type of freefall back in 1960 with less tech then. He probably did it in a tweed suit and complained his pipe went out half way down [media=] [/media] Link to comment Share on other sites More sharing options...
Albert Tatlock Posted October 11, 2012 Share Posted October 11, 2012 Anything going through any air faster than sound will produce a sonic boom...including Felix. Not true, an aircraft travelling fast enough (and high enough) would eventually have a sonic wave angle of zero whereby the air reverts to "clinging" onto the aircraft. (tried and failed to find the source for this - will keep trying though) Technically it would not be 'going through air' in those conditions though, rather 'riding the air below' much like a surfer rides the water? Link to comment Share on other sites More sharing options...
Scotteo Posted October 11, 2012 Share Posted October 11, 2012 Depends how little gas within a given volume needs to be present for it to be classed "air"! What I really enjoy about this whole event and discussion is that even NASA are unsure exactly what will happen when he reaches supersonic. The great Urghknown visited once again Link to comment Share on other sites More sharing options...
Albert Tatlock Posted October 11, 2012 Share Posted October 11, 2012 Attempt off till Sunday or Monday earliest Link to comment Share on other sites More sharing options...
schwarzenchild Posted October 11, 2012 Share Posted October 11, 2012 has an idea to a) make money and b) promote the IOM set up an IOM company to sell lottery tickets - with the prize being an edge of space jump. (lottery would be like that of the "win a car" type at airports) looks like the set-up / 1st drop costs would be:- balloon $241,000, helium $70,000, suit $200,000, capsule $200,000 (est), ground crew $150,000 (est) = $861,000 say sell 10,000 tickets for each jump at say $150 each = $1.5m hold the money in trust until enough tickets sold to cover costs tickets sold on basis of refund say 75% if not enough sold so 25% retained for admin costs presume some of the kit is re-usable. odds are a 1 in 10,000 chance of winning for only a $150 outlay comments / backers please Link to comment Share on other sites More sharing options...
Lisenchuk Posted October 11, 2012 Share Posted October 11, 2012 Anything going through any air faster than sound will produce a sonic boom...including Felix. Not true, an aircraft travelling fast enough (and high enough) would eventually have a sonic wave angle of zero whereby the air reverts to "clinging" onto the aircraft. (tried and failed to find the source for this - will keep trying though) Technically it would not be 'going through air' in those conditions though, rather 'riding the air below' much like a surfer rides the water? The boundary layer effect is at work here. Link to comment Share on other sites More sharing options...
Bobbie Bobster Posted October 11, 2012 Share Posted October 11, 2012 has an idea to a) make money and b) promote the IOM set up an IOM company to sell lottery tickets - with the prize being an edge of space jump. (lottery would be like that of the "win a car" type at airports) looks like the set-up / 1st drop costs would be:- balloon $241,000, helium $70,000, suit $200,000, capsule $200,000 (est), ground crew $150,000 (est) = $861,000 say sell 10,000 tickets for each jump at say $150 each = $1.5m hold the money in trust until enough tickets sold to cover costs tickets sold on basis of refund say 75% if not enough sold so 25% retained for admin costs presume some of the kit is re-usable. odds are a 1 in 10,000 chance of winning for only a $150 outlay comments / backers please Interesting idea. However, would also require: - Sales & Marketing costs - departure lounge pitches don't come cheap, staff costs - Capitalisation and licensing costs for the gaming company & license, possibly in multiple jurisdictions - Insurance costs (life/injury, liability) for the winner could be significant. I suspect that it might be optimal for the organiser to source this cover and include it in the ticket price - in order to reduce the possibility of getting sued by the winner, or their family. Also, competition from the suborbital space tourism operators, or competitions with a ticket on their vehicles. Target market for, as an example, a Virgin Galactic seat prize for a USD50 ticket will be much broader than that for a crazy supersonic freefall. Also, would it count as a Suborbital Reusable Launch Vehicle, with the passenger classified as a space flight Participant and therefore require FAA licensing and compliance with US 14 CFR Pts 440-460? I expect to see quite a few more "win a trip to space" competitions (so far, Virgin, Boston Metro Daily, New Scientist/Audi, Comic-Con, KSC, Seattle Space Needle, Guinness, Intel , Gillette, Volvo, 7UP, then I stopped looking...) Link to comment Share on other sites More sharing options...
sirstabby Posted October 11, 2012 Share Posted October 11, 2012 Eh? The sound barrier has been broken in free fall before, ya know? But all the reports are bigging it up as the first skydiver to do so. Did the ones to which you refer just hit the ground without a parachute? Looks like I'm wrong actually, I thought that Kittinger had exceeded Mach 1. Link to comment Share on other sites More sharing options...
thebees Posted October 11, 2012 Share Posted October 11, 2012 Get off Manx Forums Stabby, no one ever admits that they're wrong here Link to comment Share on other sites More sharing options...
HeliX Posted October 11, 2012 Share Posted October 11, 2012 has an idea to a) make money and b) promote the IOM set up an IOM company to sell lottery tickets - with the prize being an edge of space jump. (lottery would be like that of the "win a car" type at airports) looks like the set-up / 1st drop costs would be:- balloon $241,000, helium $70,000, suit $200,000, capsule $200,000 (est), ground crew $150,000 (est) = $861,000 say sell 10,000 tickets for each jump at say $150 each = $1.5m hold the money in trust until enough tickets sold to cover costs tickets sold on basis of refund say 75% if not enough sold so 25% retained for admin costs presume some of the kit is re-usable. odds are a 1 in 10,000 chance of winning for only a $150 outlay comments / backers please Insurance cost: £6 trillion squillion pounds Link to comment Share on other sites More sharing options...
schwarzenchild Posted October 11, 2012 Share Posted October 11, 2012 has an idea to a) make money and b) promote the IOM set up an IOM company to sell lottery tickets - with the prize being an edge of space jump. (lottery would be like that of the "win a car" type at airports) looks like the set-up / 1st drop costs would be:- balloon $241,000, helium $70,000, suit $200,000, capsule $200,000 (est), ground crew $150,000 (est) = $861,000 say sell 10,000 tickets for each jump at say $150 each = $1.5m hold the money in trust until enough tickets sold to cover costs tickets sold on basis of refund say 75% if not enough sold so 25% retained for admin costs presume some of the kit is re-usable. odds are a 1 in 10,000 chance of winning for only a $150 outlay comments / backers please Insurance cost: £6 trillion squillion pounds surely not - just have it as one of the T&C's that the entrant/jumper isn't insured and that its their own responsibility. Link to comment Share on other sites More sharing options...
sirstabby Posted October 11, 2012 Share Posted October 11, 2012 Get off Manx Forums Stabby, no one ever admits that they're wrong here That wasn't me, that was some other sirstabby Link to comment Share on other sites More sharing options...
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