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Sanswire 3 still shows that shape.
Well if thats right thats great.
So you think the surface can maintain shape on it's own without higher presure inside. Well if thats true thats find, but i don't see how. The pictures look to me as if there is pressure.
still don't quite understand why you'd add a ballast mechanism when the helium expansion or de-spansion would occur naturally within the gas containment system.
If Hull is sealed how does this occur?
The hull would naturally fill with air or expend air based on its altitude. The air itself wouldn't add any additional weight, because the air weighs the same as the ambient environment outside.
I agree with everything else.
crashtestsuperstar Here's How I see It.
Notes:
- Controlled flight is a must. Airship must maintain volume to: reduce friction = reduce energy consumption, and for controlled flight.
- Composit frame is more like a saddle to distrubite weight of equipment.
- All you need to do is keep the postitive pressure within in porportion to exterior atmospheric pressure @ all altitudes of flight..
1) Inner Bag of mylar and alum composit to hold Helium. Bag is made XXXXXXX Large and opens, Similar to jiffy pop bag, not latex baloon.
2) Outer hull shape is maitained with adjustment of internal airpressure, and Helium.
3) If we have a payload of 4,000 lb. Plus composit frame, Inner and,outer bags = 2000 lb. We have a Total to Lift of = 6000 lbs
4) Helium Gas exspands 13.166 times from 0 alitude to 65000'. ( on there own website they post 15.2 times)
5) The lifting ability of helium @ sea level and 65000' remains the same. ( 6.87 times diff of atmosphere )
- Air weighs @ sea level 1.2250039125 grams per liter. 1 cubic meter = 1225.0039125 grams ( 2.701lbs )
Helium @ sea level weighs 0.1785 grams per liter. ( 6.869548083 x diff )
- Air @ 65,000ft = 0.091582816 grams per liter. 1 cubic meter = 91.582816 grams. ( air weights 92.52% less )
Helium @ 65,000ft = 0.013331709 grams per liter. ( 6.869548083 x diff )
- Therefore Helium has 1.046503913 gram of lift per liter, 1 cubic meter can lift 1046.5 grams = 2.307lb
So now we design a fully loaded ship, sitting on stands, no helium
B ) S1 2600.78 cubic meter of helium can lift 2722kg = 6000lb.
C ) S1 Exspansion needed for helium to 65,000' 15 times = 39,011.7 cubic meters
D ) S1 Sense Helium will never fill Airship completly lets add extra 2 times gas volume = 5201.5 cubic meters
E ) S1 Size, Total Volume = 44,213 cubic meters
F ) S1 = 20 meters diam x 141 meters long. ( 65.62' diam by 462.6' long )
Adj as needed to take in fillet nose and tapered rear.
Start Here
So now we start to lift Air ship. We pump in 2600 cubic meters of helium, as we bleed off 2600 cubic meters of air. 1/17 th of total volume. Airship is now buoyant.
- As the airship ascends, the gases inside hull expands due to the reduction of the ambient ( external )air pressure. To prevent overpressure of the airship hull as it rises, valves are used to release air, leveling out the differences in air pressure inside and out. Also as pressure lowers inside, helium within it's bag exspands, replacing the air which is bleed off.
- We can do this all the way to 65000' by bleeding off the remainder of air volume, and allowing helium to exspand.
keep in mind as we climb air inside hull has weight. This is our ballast, just like sandbags.
- As air is bleed off Helium will exspand maintaining pressure against hull insides, and becoming a bigger percentage of volume.
Now engines come into play
To go up, engines drive ship up, air is released and you go up, do this when winds are lightest, dusk or dawn.
If need be you don't plow your way through high winds, instead you go with the flow. Gaining alitude as you go.
To descend, engines drive air ship down, air is pump in, Air has weight, Helium again gets compressed, so ship starts to decend. Airship hull maintains shape.and engines use vector thrust to steer ship to port.
I saw the same thing, but if you look at the side view and stretch it in width, say front to back = x, Height = Y then in the Z direction, I think its same ship design.
vkoenig
They'd pack it in between rails and light it off. I've never seen that done but heard about it.
They showed that on discovery a few weeks ago Arizona Cardinals stadium where the grass field was rolled out.
http://www.metafilter.com/mefi/54636
vkoenig
The secret for long endurance flight is to keep the helium under very low pressure
A lot of articles were saying the same thing. But others say leakage still goes on.
Do you think low pressure can slow it down enought to last that long?
What I want to know is what material is going to hold helium from leaking for 18 months?
Did a lot of reading today and everything I read talks about what doesn,t work
I see aship ascending while it travels along with the wind.
Downdraft maby
rwehapi2003
Only when station keeping does windspeed matter.
We are so close to agreeing
If the containment volume is to remain constant, then left diminishes with altitude. I agree
If the helium were allowed to expand, lift would remain constant.
I Agree
In other words, if the Strat-2 could EXPAND 16 times its' volume, then lift would be constant. You must take into consideration gas cell pressure versus ambient pressure at varying altitudes.
I Agree
So at 0 altitude you have enought gas for lift. plus enought air volume and pressure to maintain hull shape and allow for exspansion.
Then as u ascend you bleed off air which lets helium exspand providing continued lift. Like you said in last sentance.
You do this all the way to 65,000ft
Don,t you think this works?
As you pump air in there is more air per cubic meter it has to weight more. Also helium is getting compressed less volume less lift.
Just think about what happens to the the gas, air inside and atmosphere as it ascends and descends.
You could release helium but why not just pump air in.
which will compress helium and ad weight.
crashtestsuperstar right on
Displacement of the helium gas is fixed due to the ship.
Gas is not fixed. The gas in a bag within a bag exspands when air is released to atmosphere.
The mass of the airship (airship parts + helium gas + AND AIR)
Think of air being used as ballast.
Lift will occure untill helium stops exspanding, and all extra weight is removed, ie air
Here's How I see It. And for the life of me I don't see what the problem is. Remember air has weight
1) Airship must maintain volume to:
reduce friction = reduce energy consumption.
controlled flight.
reduce pressure differential between air in hull and helium.
2) Shape is maitained with composit frame, airpressure, and Helium.
3) Outer bag and one helium inner bag. Airpressure inside hull surrounds Helium bag.
Inner Bag of mylar and alum composit to hold Helium. Maby patents will give clue to makeup.
4) Composit frame is more like a saddle to distrubite weight of equipment, and to maintain shape. See picture notice where they are located.
Pressure and Temperature
1- Mylar and alum composit bag is made XXXXXXXLarge and exspands as air pressure is blead off up to @ 65,000 ft. Similar to jiffy pop bag, not latex baloon.
2- As the airship ascends, the air inside hull expands due to the reduction of the ambient ( external )air pressure. To prevent overpressure of the airship hull as the airship rises, valves are used to release air, leveling out the differences in air pressure inside and out. Also as pressure lowers inside, helium within it's bag exspands, replacing the air which is blead off
3- All you need to do is keep the postitive pressure within in porportion to exterior atmospheric pressure.
Now engines come into play
To go up engines drive ship up, do this when winds are lightest, dusk or dawn.
If need be you don't plow your way through high winds, instead you go with the flow. Gaining alitude as you go.
To descend engines drive air ship down, as airship decends air is pumped in to balance the air in the hull as atmospheric pressure increases. Air has weight so ship starts to decend. Lifting gas is again gets compressed. Airship hull maintains shape
VKOENIG Helium lift diminishes with altitude. IS WRONG
1 Altitude change: Note Gas exspands 13.166 x. Sans web site says 15.2, but whatever.
Air @ sea level 1.2250039125 grams per liter. 1 cubic meter = 1225.0039125 grams
Helium @ sea level weighs 0.1785 grams per liter. ( 6.869548083 x diff )
Air @ 65,000ft = 0.091582816 grams per liter. 1 cubic meter = 91.582816 grams. ( 92.52% less )
Helium @ 65,000ft = 0.013331709 grams per liter. ( 6.869548083 x diff )
Diff doesn't change at altitude. Lift the same.
view hanger in goog earth @ lat 34.611183° lon -118.075593°
Notice you can sit in street ( E avenue P ) and view all you want
Just makes you proud to read that PR.
Scottraders make sure news is turned on. Got news at 58 cents.
only problem is had to hunt down news. They for some reason don't disp it.
Business plan, this is there business plan!
http://www.cnbc.com/id/15837285?q=gte
I don't see the word Buy
Looks to me out 0f 36000 shareholders 35975 don,t know yet the good news!
Tail surfaces are needed to stabilize an airship. At the University of Toronto, extensive studies showed the influences of stabilizers for an airship, and the conclusion drawn recommended to always use fins with an airship.
Tail surfaces and rudders need to be designed so that they allow effective control of the directions of the airship. Because of VT and independently controlled motors, rudders are not necessary. Also, they are only of limited practical use because of small air speed. Stabilizers are used and designed in a way to stabilize, but not to overstabilize. Overstabilization means a limitation of the airship's agility through too large fins. With too small fins, the ship often progresses in a wave-like motion.
a) Steering
There are many possibilities to control and steer a floating airship in the air. two motors, on each side, connected through a movable axle, that can tilt up and down. This feature is called vectored thrust (VT).
VT allows for very exact vertical steering of an airship. It may replace the less effective rudders, which tend to react slow because of the only low speeds of an airship.
VT produces powered static lift and may play an important role in fine-calibrating the float of an airship. It makes it possible for an airship to descend without the use of a valve or other means of letting off helium.
Since the two motors can be operated independently forth and back and are separated by over 1 m from each other, they provide a great horizontal maneuverability. One motor may thrust forwards, the other backwards. Backward thrust is a little smaller than forward thrust because of the special shape of the propellers.
As mentioned, a special feature important for any airship is the possibility to operate the motors forth and back, to produce thrust in both directions. in combination with VT, this enables the airship to ascend, descend, and make sharp turns in both directions.