Clifton_RL@cc.curtin.edu.au (11/16/90)
In article <1990Nov11.152602.18547@crl.dec.com>, geer@crl.dec.com (Dan Geer) writes: > Anyone have a terminal velocity wind chill table? It's pretty hot round here, but if I understand the concept of wind chill correctly, it is referring to prolonged exposure, rather than brief as in free falls. Then, the surface of one's skin has time to equilibrate with the radiation balance, the fine arteries have closed up and a temperature gradient has developed across the fat layer. After all noone frets at dipping a naked hand into the freezer for an ice cream. For that matter, 40 seconds in freefall for a moderately protected jumper doesnt represent much of a heat loss. It is the two minutes of gliding with your hands in the wind that gives you the blue knuckles because only then can your flesh lose all the heat. Try checking the canopy etc, but still leaving your keepers in the toggles until one grand - the CRW minimum cutaway height. Cheers! Roger Clifton, Kalgoorlie, West Australia
geer@crl.dec.com (Dan Geer) (05/10/91)
someone just offered me a chance to jump out of their plane. this is mucho premature for this novice, but i do have a question then - who/where/when/how is this permitted? a pointer to a reference would be fine. --dan
ds4a@dalton.acc.Virginia.EDU (Dale Southard) (05/10/91)
In article <1991May9.194510.3844@crl.dec.com> geer@crl.dec.com (Dan Geer) writes: >someone just offered me a chance to jump out of their plane. > >this is mucho premature for this novice, but i do have a >question then - who/where/when/how is this permitted? > >a pointer to a reference would be fine. Reference pointer: Federal Aviation Regulations Part 105. You can find most of the important stuff in the Skydiver's Information Manual - that ugly blue binder that sits on the corner of every packing table in the United States. Basically, if you are going to jump at the DZ you'll need. -premission of the DZ/Airport owner. -A plane STCed for door removal. -An emergency rig for the pilot. -Written notification of the nearest FAA Flight Service Station. Blue Skies. --> --> Dale UVa (ds4a@virginia.edu)
robie@umbc2.umbc.edu (Mr. William Robie; POSI (GRAD)) (05/10/91)
In article <1991May9.232752.24042@murdoch.acc.Virginia.EDU>, ds4a@dalton.acc.Virginia.EDU (Dale Southard) writes... >In article <1991May9.194510.3844@crl.dec.com> geer@crl.dec.com (Dan Geer) writes: >>someone just offered me a chance to jump out of their plane. >>this is mucho premature for this novice, but i do have a >>question then - who/where/when/how is this permitted? >>a pointer to a reference would be fine. > >Basically, if you are going to jump at the DZ you'll need. >-premission of the DZ/Airport owner. >-A plane STCed for door removal. >-An emergency rig for the pilot. >-Written notification of the nearest FAA Flight Service Station. > >--> --> Dale UVa (ds4a@virginia.edu) > As usual, Dale is right ... but lest there be no confusion (your posting wasn't 100% clear), you also SHOULD have LESSONS! I certainly hope, in this day and age, that nobody would let some buddy with an old parachute and a pilot's license talk them into becoming a sport-death parachutist... but it has happened in the past. If you are a TOTAL novice, go to a competent parachuting center and learn how first. Actually, the law does not require you to have instruction before jumping out of a plane ... but it doesn't require you to have instructions before sucking on a gun barrel with your toe on the trigger, either. (the gun is cheaper ... and aviation doesn't get blamed for the death that way). Blue ... and safe ... skies! Bill
yzarn@lhdsy1.chevron.com (Philip Yzarn de Louraille) (05/14/91)
In article <1991May9.194510.3844@crl.dec.com> geer@crl.dec.com (Dan Geer) writes: >someone just offered me a chance to jump out of their plane. >this is mucho premature for this novice, but i do have a >question then - who/where/when/how is this permitted? There is a lot of things to check for if you want to do this safely. First of all, is the pilot knowledgeable about dropping skydivers? If not, pass. If he is, the door of the airplane will have to be removed. Can the airplane be flown without it? Does the pilot own a chute (must be a reserve (certified and up-to-date))? Where would you be jumping? On top of a city, a field, a dropzone? If on top of a city, the FAA has to be notified. (Of, course, what I'm telling you are the things that should be done for a *legal* jump. If the jump is illegal, then make sure the pilot knows he could loose his/her license for life if caught...) Then come the safety factors: tape anything (with strong tape) that would interfer with your exit, rehearse on the ground with your equipment on, check for where you could get stuck, or where your equipment could get caught, ripped, etc.... Practice exit signals with the pilots: he won't be able to hear anything with the door off. Can he fly the airplane after a cut, the door off and maybe you hanging on a strut? Airplanes have a way of flying differently with these conditions, etc... In other words, there are a lot more variables, more than could (and will) go wrong when jumping off an airplane which is not a regular jump plane. USE EXTREME CAUTION. Good luck! -- Philip Yzarn de Louraille Internet: yzarn@chevron.com Research Support Division Unix & Open Systems Chevron Information & Technology Co. Tel: (213) 694-9232 P.O. Box 446, La Habra, CA 90633-0446 Fax: (213) 694-7709
geer@crl.dec.com (Dan Geer) (05/17/91)
i started this question of ``where can you jump'' somewhat inadequately it would seem. point one, i *am* in training and know enough to stick with it, etc., etc., etc. what i wanted to know is where is it ``ok'' to jump. what i have been offered is a hell of a ride in a stunt plane culminating in a unbelted exit from the stunt plane on a barrel roll. i've seen it done, these folks do it from time to time... got that? 1. canopy back 2. ignore fasten-seat-belt sign 3. roll plane (including a more or less zero g upside down arch) 4. exit upside down who knows what lurks.. --dan
geer@crl.dec.com (Dan Geer) (06/06/91)
anyone going to the usenix convention and want a side trip to pigeon forge? [ if this makes no sense, ignore it ] --dan