SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Non-Tech : Alternative energy -- Ignore unavailable to you. Want to Upgrade?


To: Doren who wrote (11754)9/17/2011 9:53:22 PM
From: Sam  Read Replies (1) | Respond to of 16955
 
The Wright Brothers - First Flight, 1903


Wilbur looks on as Orville pilots
the first powered flight



On December 17, 1903, Orville Wright piloted the first powered airplane 20 feet above a wind-swept beach in North Carolina. The flight lasted 12 seconds and covered 120 feet. Three more flights were made that day with Orville's brother Wilbur piloting the record flight lasting 59 seconds over a distance of 852 feet. The brothers began their experimentation in flight in 1896 at their bicycle shop in Dayton, Ohio. They selected the beach at Kitty Hawk as their proving ground because of the constant wind that added lift to their craft. In 1902 they came to the beach with their glider and made more than 700 successful flights.

Having perfected glided flight, the next step was to move to powered flight. No automobile manufacturer could supply an engine both light enough and powerful enough for their needs. So they designed and built their own. All of their hard work, experimentation and innovation came together that December day as they took to the sky and forever changed the course of history. The brothers notified several newspapers prior to their historic flight, but only one - the local journal - made mention of the event.

"I found the control of the front rudder quite difficult"

The conditions on the morning of December 17 were perfect for flight - high, consistent winds blowing from the north. At about 10:30 that morning, Orville Wright lay down on the plane's wing surface and brought its engine to life in preparation of launching it and himself into history. His diary tells the story:

"When we got up, a wind of between 20 and 25 miles was blowing from the north.

We got the machine out early and put out the signal for the men at the station. Before we were quite ready, John T. Daniels, W. S. Dough, A. D. Etheridge, W. C. Brinkley of Manteo, and Johnny Moore of Nags Head arrived.

After running the engine and propellers a few minutes to get them in working order, I got on the machine at 10:35 for the first trial. The wind, according to our anemometers at this time, was blowing a little over 20 miles (corrected) 27 miles according to the Government anemometer at Kitty Hawk. On slipping the rope the machine started off increasing in speed to probably 7 or 8 miles. The machine lifted from the truck just as it was entering on the fourth rail. Mr. Daniels took a picture just as it left the tracks.

I found the control of the front rudder quite difficult on account of its being balanced too near the center and thus had a tendency to turn itself when started so that the rudder was turned too far on one side and then too far on the other. As a result the machine would rise suddenly to about 10 ft. and then as suddenly, on turning the rudder, dart for the ground. A sudden dart when out about 100 feet from the end of the tracks ended the flight. Time about 12 seconds (not known exactly as watch was not promptly stopped). The lever for throwing off the engine was broken, and the skid under the rudder cracked. After repairs, at 20 min. after 11 o'clock Will made the second trial.

The course was about like mine, up and down but a little longer over the ground though about the same in time. Dist. not measured but about 175 ft. Wind speed not quite so strong.

With the aid of the station men present, we picked the machine up and carried it back to the starting ways. At about 20 minutes till 12 o'clock I made the third trial. When out about the same distance as Will's, I met with a strong gust from the left which raised the left wing and sidled the machine off to the right in a lively manner. I immediately turned the rudder to bring the machine down and then worked the end control. Much to our surprise, on reaching the ground the left wing struck first, showing the lateral control of this machine much more effective than on any of our former ones. At the time of its sidling it had raised to a height of probably 12 to 14 feet.

At just 12 o'clock Will started on the fourth and last trip. The machine started off with its ups and downs as it had before, but by the time he had gone over three or four hundred feet he had it under much better control, and was traveling on a fairly even course. It proceeded in this manner till it reached a small hummock out about 800 feet from the starting ways, when it began its pitching again and suddenly darted into the ground.

The front rudder frame was badly broken up, but the main frame suffered none at all. The distance over the ground was 852 feet in 59 seconds. The engine turns was 1071, but this included several seconds while on the starting ways and probably about a half second after landing. The jar of landing had set the watch on machine back so that we have no exact record for the 1071 turns. Will took a picture of my third flight just before the gust struck the machine.

The machine left the ways successfully at every trial, and the tail was never caught by the truck as we had feared.

After removing the front rudder, we carried the machine back to camp. We set the machine down a few feet west of the building, and while standing about discussing the last flight, a sudden gust of wind struck the machine and started to turn it over. All rushed to stop it. Will who was near one end ran to the front, but too late to do any good. Mr. Daniels and myself seized spars at the rear, but to no purpose. The machine gradually turned over on us. Mr. Daniels, having had no experience in handling a machine of this kind, hung on to it from the inside, and as a result was knocked down and turned over and over with it as it went. His escape was miraculous, as he was in with the engine and chains. The engine legs were all broken off, the chain guides badly bent, a number of uprights, and nearly all the rear ends of the ribs were broken. One spar only was broken.

After dinner we went to Kitty Hawk to send off telegram to M.W. While there we called on Capt. and Mrs. Hobbs, Dr. Cogswell and the station men."

References:
Orville Wright's diary appears in: McFarland, Marvin, The Papers of Wilbur & Orville Wright (2001); Crouch, Tom D., The Bishop's Boys: A Life of Wilbur and Orville Wright (1989); Wright, Orville, How We Invented the Airplane (1953).

How To Cite This Article:
"The Wright Brothers - First Flight, 1903", EyeWitness to History, www.eyewitnesstohistory.com (2003).




To: Doren who wrote (11754)9/20/2011 6:31:30 AM
From: Dennis Roth  Read Replies (3) | Respond to of 16955
 
Bio-jet Fuel Tests Successful, Say Embraer and GE
By: David A. Lombardo
ainonline.com

September 14, 2011
Maintenance and Modifications

Embraer and GE recently held a series of test flights in an E170. The tests, flown out of Embraer’s Gavião Peixoto facilities, benchmarked the operational characteristics of the airplane and its GE CF34-8E engines when powered by HEFA (hydro-processed esters and fatty acids) fuel under a broad range of unique flight conditions. The flights involved powering one of the two GE engines with the maximum ASTM permissible mix of 50 percent jet-A and HEFA derived from camelina. Commonly known as wild flax, camelina grows wild in Northern Europe and Central Asia; it was introduced recently in the U.S. as a cattle and chicken feed supplement.

“HEFA fuel is a sustainable alternative fuel option, meaning this type of synthetic fuel is produced from renewable feedstocks that also reduce total greenhouse gas emissions. It has demonstrated its ability to be a possible alternative fuel for aviation use. It should be pointed out that it is not the only sustainable alternative fuel option as there are multiple alternative fuel offerings that have the potential to be used in aviation, but this is definitely a good, viable option,” Mike Epstein, leader of alternative fuels for GE Aviation, told AIN.

According to Epstein, a practical application for HEFA fuel will not be available in the short term. “Sasol in South Africa is already using an alternative blend of jet fuel for commercial aircraft. For alternative fuels to see more widespread use, refineries dedicated to alternative fuels will need to be built to produce the quantities of fuel required. At this point we are five to ten years away from that happening, but in the next few years we’ll likely see an increase in alternative blends of fuel used in both commercial and military aircraft,” he said.

For the consumer one of the big questions is cost, which Epstein said is highly site- and region-dependent, but time will help. “Our expectation is that in a few areas, taking into account existing government incentives, cost parity may be reached in the short term. In the long run technologies will continue to be developed and matured that will allow for reduced costs and more widespread production and utilization,” he said.

In Epstein’s opinion the biggest task will be building the refineries to produce the fuel as they will require significant capital investment. The good news for the operator is the fuel will be “drop-in,” meaning no changes will be required of engine or aircraft technology to use it.

Over time alternative fuels could replace jet fuel completely, but Epstein cautioned it will be a gradual process. The fuel will initially be a blend of alternative fuel and jet-A and then slowly progress to 100 percent alternative fuels.

“There are challenges such as [energy] density that remain with respect to 100-percent alternative fuels, but a lot of good companies are working on those challenges and we are probably several years away from 100-percent alternative fuel blends being ready for testing,” he said.