Erik Roner puts the umbrella theory to the test in this hot air balloon skydive!
Primitive Technology: Natural Draft Furnace I built a natural draft furnace to test ideas about how hot a furnace could get without the use of bellows. Natural draft is the flow of air through a furnace due to rising hot air. The hot gasses in the fuel bed are more buoyant than the cold air outside the furnace causing them to rise. Fresh combustion air then enters the base of the furnace to replace the rising combustion gasses, keeping the fuel bed burning. This effect increases with: 1. the average temperature of the fuel bed relative to the outside air and 2. The height of the furnace. Two other important factors are the size of the tuyere (air entry pipe) and lump size of the fuel bed as these effect the resistance to airflow through the furnace. The furnace was tested with wood fuel and some ore was melted but produced no iron. High temperature were indeed produced (probably about 1200 c). These types of furnaces were once used for smelting copper and iron ores in around the world in ancient times, usually using charcoal as a fuel and in some cases wood too.
Italian Eurofighter Typhoon Jet Crashed Into Sea || Terracina, Italy !!! On Sunday Sept. 24, 2017, an Italian Air Force Eurofighter F-2000A Typhoon belonging to the Reparto Sperimentale Volo (Test Wing) has crashed into the sea at Terracina, 76 kilometres south of Rome.
Based on the several videos that have already emerged on social media, the pilot Capt. Gabriele Orlandi was unable to /did not recover the aircraft at the end of a looping and didn’t attempt to eject from the jet.
The pilot is dead, no ejection. The Eurofighter failed to gain altitude after a loop.
The Eurofighter aircraft of the experimental department was engaged in a show when it suddenly collapsed at sea.
Lockheed Martin F-35B Firing Test F-35B BF-01 completes the first ever aircraft-mounted test-fire of the podded 25mm GAU-22/A cannon at Pax River. The Lockheed Martin F-35 Lightning II is a family of single-seat, single-engine, all-weather stealth multirole fighters undergoing final development and testing by the United States. The fifth generation combat aircraft is designed to perform ground attack and air defense missions. The F-35 has three main models: the F-35A conventional takeoff and landing (CTOL) variant, the F-35B short take-off and vertical-landing (STOVL) variant, and the F-35C carrier-based Catapult Assisted Take-Off But Arrested Recovery (CATOBAR) variant.
Crazy lego air engine Test engine built for the #SuperAwesomeMicroProject showcasing a 64 cylinder radial lego engine running at full throttle. We made 3 more and grouped them forming the 256 cylinder behemoth that drives or life-sized lego hot-rod.
How To Connect With Anyone Studies say that 4 minutes of uninterrupted eye contact can increase intimacy. To test this this theory out, we brought in six pairs in different stages of their relationship and had them try it.
Crash Test: Παλιό εναντίον καινούριου Η Chevrolet έκανε ένα ενδιαφέρον crash test βάζοντας απέναντι δύο αυτοκίνητα με διαφορά ηλικίας 50 ετών. Μια Chevrolet Bel Air του 1959, και μια Chevrolet Malibu του 2009.
Intelligence Test Streamer Mikaylah takes an internet test to find out if she's smarter than Harvard University students. The rule is simple: she must respectively pronounce 5 words appended to a list of 5 proposed words. When the test is over, Mikaylah just has to click on a link to discover the result.
Reporter is hit by car on live TV The correspondent of the TV channel from West Virginia was hit by a car on the air. After that, she just got up, calmed everyone down and continued reporting.
Large snowball fight in Washington A snowstorm swept through Washington and its region on Monday, January 3, shutting down federal services and schools, stopping buses, and accentuating air traffic disruptions. Nevertheless, this allowed the inhabitants to have a giant snow fight.
Collision between Japanese and British catamarans on sail GP No injuries.
The damage forced the Japanese crew to abandon the day's test.
The British at fault get 6 penalty points over the season.
If the Japanese ship cannot be repaired by tomorrow for the rest of the event, the British sailboat will not be authorized to race that day. The race organizers are checking whether it is not possible to use equipment from the faulty catamaran to repair the Japanese equipment for the rest of the race.
Αεροσκάφος σε απώλεια στήριξης, τη στιγμή πτώσης αλεξιπτωτιστών Την Πέμπτη 14 Οκτωβρίου του 2021 στον κόλπο Mossel της Νότιας Αφρικής, ένα αεροσκάφος Beechcraft King Air C90 βρέθηκε σε απώλεια στήριξης κατά τη διάρκεια πτώσης αλεξιπτωτιστών. Στη συνέχεια, το αεροσκάφος έκανε περιστροφές εκτός ελέγχου, με κίνδυνο να χτυπήσει μερικούς από τους αλεξιπτωτιστές που είχαν ήδη πηδήξει. Ο πιλότος κατάφερε ευτυχώς να ανακτήσει τον έλεγχο του αεροσκάφους και στη συνέχεια να προσγειωθεί με ασφάλεια στον διάδρομο προσγείωσης.