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Thanks. OK, good explanation there; for maintaining good health. Acceptable. Do not know why eating unlisted kangaroo, iguana, penguin, vicuña, orca... would or would not be healthy. "It was thought" by who ? By the decretor of the dietary rules ? And that was... And the purpose of avoiding contracting dangerous diseases... those diseases were created by...

I meant if the message came from God, who knew all species himself created in all other continents, why weren't those listed, as the turkey among many...

Any reason on the selection of what to eat and what not to ? Are the animals listed only local fauna on the middle east, not including other 'creations of God' from other continents ? Guinea pigs, crabs, lobster, turkey, clams... are they "unclean" ?

Not graphite; not graphene; not new either : ---->http://www.bareconductive.com/

Thanks. The coolant these people market is about 68% ethylene glycol + 30% propylene glycol + corrosion inhibitors Polyethylene glycol is not in the picture.

What are the hurdles that prevent from coming up with at least a working gadget beyond keeping it just as a curiosity for scratching heads ? How would you design a useful machine from this 'borrowed' technology nitinol (Nickel Titanium Naval Ordnance Laboratory) ? Is there a way to formulate the alloy for smaller delta temperatures ? Please ignore the "Free" word in the title below. Does not apply. ----> You will read between the lines it is a 'Godsent' material... Yeah, call it 'God'

Did a quick preliminary qualitative test; based in gas production, about a spoonfull of acetone in a -say non-latex bladder- with a 5 watt immersed bulb in it as heater element. Initially there is no gas in it, just the liquid acetone. Power would come from a battery/solar cells on the glider wings. After a few minutes, bubling was very active. One hour later, gas was about six times the amount of liquid acetone. Too long for a preferred 'snapping' action of immediate surfacing. Yes, it would surface anyway as there is some buoyancy provided, but too late? The bouyancy, small and took too long to produce with five wattshour, could be increased with more power, BUT that test was at atmospheric pressure (not at ocean depths pressure onto the bladder, and at room temperature, not at cold depth temperatures) which both together would greatly impair the gas expansion amount. To follow some day, based in a micro compressor. Sucking gas from a bladder to a lesser volume vessel to promote sinking. Instantaneously releasing it back to the bladder to start surfacing. Will see... -Not ready yet for complex materials quicky tests-

Resurrecting the topic; just found someone is doing what I was after, and been after, for maaaany years. Not from petroleum , but : ----> http://www.evanscooling.com/ Related : http://www.alfabb.com/bb/forums/spider-1966-up/190071-evans-waterless-coolant-jay-lenos-website.html http://www.bimmerfest.com/forums/showthread.php?p=5964971 http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=258888 And partial composition : http://www.hrpworld.com/client_image...pdf_3415_3.pdf And very pretty data : www.dow.com/PublishedLiterature/dh.../0901b803800479d9.pdf http://www.dow.com/ethyleneglycol/about/properties.htm So no water in coolant seems real. Opinions ?

Thanks, Marc, for your very elaborated and time consuming posts #21 and #22 above. Clearly show your involvement in the subject, your knowledge and expertise. The exposure of alternatives where you poured your brains onto it. Once I learned that simple projects do not yield huge successes; complex problems do. Complex tasks requiere of these complex engineering considerations. Currently in the pursuit of parts to build a few alternates to test and evaluate, hampered by imminent moving to another state and holding back progress and working with more dedication to the glider model. But will be back with more adrenaline when settled.

No matter how good the chemical conductor be and easy to trace as with a pencil; circuits the way you envision are just the paths between components. Components are not meant to be just touching the graphite or other traces, but to bond intimately to them, and as they use metallic leads; securing a reliable connection would be a nightmare. Forget it ! In early nineties, I serviced an experimental? PCJr. ? by IBM that had its plastic cabinet internal surfaces painted/sputtered with copper and that paint etched with the components soldered onto it. So there was no fiberglass board; the PC cabinet was the board. Seems it did not provide much for the future as never saw that method used again.

Sorry, another brain fart from poor English : shoud say bearing ball , or steel ball above instead of ball bearing.

Thanks, gentlemen. I came up with an hysteretic mechanism, but appreciate your inputs. ----> A plastic pipe with a ball bearing inside and weak magnet end caps.

..."Whelks, in my opinion have very little taste and lots of texture. Not good eating.".... Didn't anyone tell you to eat only what is inside of the shell ?

Thanks Marc for your elaborated and thoughtful post using purely delta temperature and fluid contraction. Deserves all the merit. Maritime environment as you say, is very agressive and there is never enough precautions in redundant sealing. Been a scuba diver for 30 years and experienced several unexpectations. Currently, am evaluating components sourcing to build the key buoyancy part of the contraption on two or three different schemes, test them as standalone (tether yes !) and much later to see housing in a PVC pipe fuselage. Something I must also consider is the delta T may not be enough at all locations the glider encounters while travels, as delta depths could be restrictive. So the contraption may work in open seas but to reach there from a 'shallow' waters launch will pose a challenge.

Thanks ! Contacting the private technology contractor should be a much better approach option. Will do.

In the name of science and technology, not warfare; what would be the correct way to find/approach a chief engineer involved with the military to propose improvements/modifications/changes to a current project ? Is anyone here in the forums working with the military forces, that could know or suggest proper contact paths ?

Because of the abundance of what you would call 'bad' foods. Any predator animal will eat first the most energy supplying parts of the killed victim, and leave the rest of the carcass for second thoughts -or next needs- if no other victims are found soon. The same predator, will go for broccoli to avoid starvation if nothing else is available. What you name 'good' foods can be a label pushed by nutritionists and not reality.

I do not think three dimensional works. Sound perceived from above and below cannot be achieved by synthesizing a psychoacustical illusion from only two speakers. Virtual surround illusion can be created by processing audio from only two channels, but that is not 3D, it is 2D Several companies have their own processing methods to the virtual surround.

Is there any new breaktrough development of a material for better containment of helium in weather balloons ? Beyond mylar, with more durable containment, perhaps from nanothechnology ? Or,.... is there any new larger molecule gas, lighter than air which will not escape trough current porous materials in balloons ?

Hi Marc. Having difficulty to discern solids which show significant expansion. If you have suggestions, please come forward. The force exerted by this one at a delta of ~20 degrees Celsius may not be useable to force enough expansion. http://i00.i.aliimg.com/photo/v0/449280688/Bi_metal_thermostat_spiral_coil_on_silicone.jpg Please comment on post #14 above.

See no botanics or agricultural or gardening in the forums, so am planting it here... What happens or not happens in a plant growing upside down that seems not to affect its development, growth and productivity, while being so unnatural ? Getting ready several 3 litre soda bottles and a few commercial brand planters to experiment in the coming spring, and compare with the normal upside up in my vegetable garden. Tomatoes and strawberries are on mind, I would post progress pictures periodically. If there is a plant choice that you know would be more successful than others, or interesting to try, please suggest.

Hi. In an attempt of exploring less complexity and difficult solid materials, let me make a parenthesis at this point, will return to the main solids expansion later. What is your opinion on following the electric route, and as bubbling from electrolysis is not promising, what about using ethanol or an even better behaving liquid in a thermally insulated sealed bellows. Heating it up will become gas causing expansion and buoyancy. Something like 'hand boiler' toys. A volatile liquid that can be easily gasified with little energy from a battery powered heating element. Which could be as simple/available or better performing enthalpy of evaporation than ethanol ? Propane, Acetone, Ethane, Carbon tetrachloride, Chloroform, Ether, Methane .... ? Under depth pressure of ~ 7atm = ~200 feet Will be back...

Thanks again, Marc. Am thinking on your good suggestions, will be back. So far I see a problem with your paragraph " If the bladder is located before the wings, its volume change will not only provide the net up or down force, it will also put the nose up or down." The air volume change due to depth pressure or lower temperature in the nose bladder would not provide surfacing force, as the pressure will reduce the volume, making it dive instead. -----> The root of the problem is that at depth, there is lower temperature, and that causes air volume reduction, sinking it more, and; at depth, there is high pressure, and that causes air volume reduction, sinking it more. Then, to my poor brain, depth pressure and temperature are not useable to provide air expansion to rise to surface. We need the opposite action. I came up with an hysteretic mechanism for nose up/down : A long sealed pipe lengthwise to the fuselage, with a ball bearing inside and weak magnet end caps. Seems to me, sealed bellows are preferable to piston/cylinders. Will be back after digesting your post and evaluating the availability of fancy materials with expanding when cold property.

Thanks, Michel. Your correct wording made a world of difference ! Great help !

Hi. Did not pay enough attention when a 10,000 sq.ft. freezer was added at a facility I worked at many years ago. ...Remember a reinforced concrete slab poured on the ground, then a ~8" layer of styrofoam, and another reinforced concrete slab on top. Forklifts danced all over that floor with no problem. Am I missing details?; what is the building technique to avoid cracking/collapse with such styrofoam sandwich ? How is it done properly int the civil engineering world ?