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And what kind of chemicals are used to protect
Air Force One?
Or are you telling us it can be seen and shot down?
Originally posted by Gmoneycricket
Still waiting for contrail pics left by
Air Force One.
If Contrails are just created and unavoidable as you all describe,
we have had many Presidents flying in the most powerful advanced planes,
that should kick out more water vapor then the average plane.
So why can't you show me a contrail or two left by Presidents?
Originally posted by Uncinus
Originally posted by surfinguru
Do you see where I'm going with this yet?? EVERY single plane I've ever witnessed leaving a persistent trail like the ones shown in the OP are four engine based platforms, never twin engine planes.
I see a lot of SouthWest jets leaving contrails here. All two engine.
But the number of engines is not really a factor in contrail formation. They type of engine itself its a small factor. Most important is the temperatur and humidity.
Try FlightAware:
flightaware.com...
You can change the city in the lower left. Then expand the map, and hover over a plane to see the type. Pick the green planes as they are the flyover planes. The second code on the first line is the aircfraft type. If you can't figure it out (e.g. B733 is Boeing 737-300, a twin engine, pretty common for SouthWest) then click in the plane and it will give you the full details.
Here is a photo I found on ChemtrailBug for November 15th, 2011 Oregon
Originally posted by ProudBird
reply to post by surfinguru
Based on the number of flights over the US, how many are short-hop, commuter flights NOT-consisting of the 747 (four engine) based platform?
Do you realize how much effort is needed to provide such a break-down in statistics? The most easy option is for anyone who wishes to just Google every airline, on their websites, and look up their fleets, to see the types they operate. Or, this site (which covers every airline in the world) also has the actual numbers too:
AirFleets.net
Originally posted by ProudBird
reply to post by surfinguru
As for the longer haul, continental flights, how many of those are actually using the 747 type platform?
Again....in majority of cases, a 747 is best suited for the extreme long-haul...so, mostly overseas.
Originally posted by ProudBird
reply to post by surfinguru
Now, out those flights that might be using a 747 based configuration, how many are really going to be flying criss-cross patterns all over the US?
The routes will occasionally intersect. But, besides the 747, the other common four-engine airliners are the Airbus A340 and A380. However, even the many, many twin-jets can leave substantial contrails, when conditions are suitable.
EVERY single plane I've ever witnessed leaving a persistent trail like the ones shown in the OP are four engine based platforms, never twin engine planes.
I seriously doubt this.
Originally posted by ProudBird
reply to post by surfinguru
Can anyone explain to me why these type of trails are not observed coming from any DC, MD or other 700 series type planes when they should be the predominant plane in the air?
OK...let me see if I can decode this...."DC"? Do you mean McDonnell Douglas? Like the DC-9 and DC-10?
"MD" is also a designation for the same company, assigned to the later models, the MD-80 series (a stretch re-design of the DC-9) and the MD-11 (also a re-design of the DC-10).
Well...first, few DC-9s and DC-10s are around anymore. Secondly, in the case of the MD-80 series, for instance (American and Delta still have a lot of them) the engines they have installed are a low-bypass fan design. These tend to not make prominent contrails as often as the more fuel-efficient engines that are high-bypass fan designs.
Third, the MD-11 is (like the 747) more suited for very long-haul. In the USA, FedEx and UPS are primary operators. (Delta used to, but parked or sold them).
Originally posted by ProudBird
reply to post by surfinguru
Keep in mind that some International airlines are allowed to overfly the USA...in their MD-11s, 747s, A340s and A380s, etc. It is covered under the term "cabotage"...you can look that up. Essentially, they can sell a ticket from, say Sydney to New York. But, if they don't have the route authority granted to them to operate a non-stop to New York, they can use the route from SYD to LAX, and land there. Then, continue on with any passengers who wish to keep going...but, the International (foreign) airline cannot sell tickets for the domestic leg between LAX and New York. That is "cabotage" in a nutshell......
Much of the world's cropland contains aluminum that stunts crops. But a new study has found a way to make plants grow tall in spite of the metal's toxic effects. The discovery, by plant biologists at the University of California, Riverside, suggests that genetic engineering could boost yields from fields that today are not ideal for growing crops.
Aluminum is common in soils--it's a major component of clay--but only in acidic soils does the metal form an ion that can dissolve into liquids and that's toxic to plants. Acidic soils make up as much as half the world's croplands, however, and aluminum toxicity is the main factor holding back crop growth in nearly 20 percent of the world's arable soils, including large areas of the United States east of the Mississippi River and northwestern Europe.
- Brazilian Journal of Plant Physiology
The objective of this study was to evaluate 36 genotypes of common bean under hydroponic conditions to identify root morphological traits that could be associated with Al resistance.
There are many factors limiting plant growth in acidic soils. Aluminium toxicity and ammonium-nitrogen
often coexist in acidic soils due to low pH and poor nitrification. Understanding the mechanisms responsible
for aluminium-ammonium interaction can help improve agricultural production and maintain ecological
stability in acidic soils. The effects of ammonium and nitrate on Al resistance, of aluminium on ammonium
uptake, and the correlation between aluminium resistance and nitrogen utilization were investigated here.
The results indicated that ammonium enhances aluminium resistance of rice compared with nitrate.
Aluminium does not inhibit ammonium uptake of Al-resistant rice cultivar but does that of the Al-sensitive
rice cultivar, and Al-resistant rice cultivar exhibits higher ammonium uptake rate under Al stress compared
with the Al-sensitive cultivar. Al resistance in rice is positively correlated with ammonium utilization or
negatively correlated with nitrate utilization. Based on these results, it is possible to increase aluminium
resistance and nitrogen utilization at the same time in acidic soils through the development of Al-resistant
and ammonium-preferring rice cultivars and the application of suitable types of nitrogen fertilizers.
Again though, how many of those specific type of flights make up the total number of daily flights over continental USA?
Originally posted by Gmoneycricket
Tick Tock
No Contrail Pictures from Air Force One yet!
Contrails from Presidential Planes must be fantasy.
Only thing is i don't live near a airpot. and there are rarely any planes.