red750 Posted Friday at 07:53 AM Posted Friday at 07:53 AM Photos: Record-breaking supersonic jet reaches 66,000 feet in 118.6 seconds Details and photos here 1
Methusala Posted Saturday at 07:15 AM Posted Saturday at 07:15 AM "Greener" supersonic flight. Similar to developing a kinder poison? 1
facthunter Posted Saturday at 07:37 AM Posted Saturday at 07:37 AM Rotting or Burning bodies put stored carbon back into the atmosphere. Nev 1
spacesailor Posted Saturday at 07:39 AM Posted Saturday at 07:39 AM " Kinder poison " . Sounds like ' flouride ' , good for some teeth, but at health problems. spacesailor
facthunter Posted Saturday at 08:18 AM Posted Saturday at 08:18 AM Does it have to be self raising? Nev 1
turboplanner Posted Saturday at 09:07 PM Posted Saturday at 09:07 PM RC Aircraft. There's a film on a kid who built one about 40 years ago. Scaling up is the problem. 1
facthunter Posted Sunday at 12:06 AM Posted Sunday at 12:06 AM A Boeing sized Bumblebee won't fly. Nev 1
onetrack Posted Sunday at 01:28 AM Posted Sunday at 01:28 AM (edited) Yeah, I was wondering how many pax they were going to cram into a 16 foot supersonic rocket. I think Turbo's on the money, let's see the full-size version before we start crowing. Anyone can send a toy rocket into space. Edited Sunday at 01:29 AM by onetrack
spacesailor Posted Sunday at 01:57 AM Posted Sunday at 01:57 AM I think it's time, for the return of the " Dirigibles " . With the ' inert ' lighter than air gas, & Solar energy driving electric motors . The larger they are , the more efficient they are. Cost vs cost over jumbo jets , with far lower running. Cost . spacesailor 1
kgwilson Posted Sunday at 02:01 AM Posted Sunday at 02:01 AM There are a number of new airship designs under way around the globe including Australia. Great when there isn't much wind but they don't perform well in bad weather conditions. 1 1
facthunter Posted Sunday at 02:48 AM Posted Sunday at 02:48 AM Too slow and difficult to handle in winds. Hydrogen is lighter than Helium which is harder to get..Nev 1
spacesailor Posted Sunday at 04:25 AM Posted Sunday at 04:25 AM But that " safety " factor plays it's role . spacesailor
facthunter Posted Sunday at 04:33 AM Posted Sunday at 04:33 AM There's no getting ABOVE the weather in an airship. No Jet engines either. Just pistons with big props flinging Ice at the rest of the Plane. Nev 1
onetrack Posted Sunday at 09:24 AM Posted Sunday at 09:24 AM I can remember when Alan Bond owned an airship, and they drove it from Sydney to Perth (you can't really say it flies", I reckon - although the CAA controlled its movements!). I think it was a pretty slow trip! - it only did a bit over 90kmh. I can remember sighting it floating past our mining lease just off the Coolgardie-Norseman Rd, 60kms N of Norseman, at a relatively low altitude. They were obviously using IFR to navigate, because they were basically following Hwy One! My memory is a bit hazy, but I seem to recall the trip was done about the same time, or maybe a little earlier, as the 1988 Bi-Centennial Balloon Race, which ran from Perth to Sydney. The Bond Airship was stationed in Sydney in 1987 and drew a lot of complaints about engine noise, invasion of privacy, and upsetting all the local dogs.
rgmwa Posted Sunday at 09:36 AM Posted Sunday at 09:36 AM (edited) Ah, yes, Alan Bond. Shared a lift with him once when he had an office on the top floor of our building. Was also was fortunate enough to set up Australia II for display (and all the other exhibits including Jon Sander's yacht Parry Endeavour) at the WA Maritime Museum. Interesting times, but well in the past now. Edited Sunday at 09:47 AM by rgmwa 1
Freizeitpilot Posted Sunday at 10:28 AM Posted Sunday at 10:28 AM A bit of thread drift here, but we should be a little more stringent with how Helium is utilised. It is a finite non-recoverable and non-renewable resource. Once released into the atmosphere, it keeps going and ultimately ends up in space. Once we use up what’s left on Earth, which may occur in less than the next 100 years, it’s gone. 2 1
johnm Posted Sunday at 09:15 PM Posted Sunday at 09:15 PM I'm thuck ............ where does helium live - is it encapsualted somehow ................. before being accessed ?
turboplanner Posted Sunday at 09:36 PM Posted Sunday at 09:36 PM Bunnings. Very good question, I'm hitting the books now. 1
Freizeitpilot Posted Sunday at 11:47 PM Posted Sunday at 11:47 PM 2 hours ago, johnm said: I'm thuck ............ where does helium live - is it encapsualted somehow ................. before being accessed ? Naturally occurring Uranium decays to Thorium and Helium. Helium being very light and inert, migrates through the Earth’s crust, and is commonly associated with natural gas when it similarly becomes trapped in reservoirs. Does that help? 2
facthunter Posted Sunday at 11:51 PM Posted Sunday at 11:51 PM It's safe as it doesn't combust but is heavier (More dense) than Hydrogen which is the simplest atom in existence. It's the basic source of the energy of the Sun. Hydrogen to Helium by Nuclear FUSION.. Nev 1
Freizeitpilot Posted Monday at 12:50 AM Posted Monday at 12:50 AM Global Helium demand regularly exceeds supply. If we were a little smarter in Oz, we would separate, recover and sell the Helium that is currently vented to the atmosphere from our LNG plants. 1 1
spacesailor Posted Monday at 01:53 AM Posted Monday at 01:53 AM Perhaps the Chinese are ' just ' doing that . With the world's cheapest LPG . spacesailor
facthunter Posted Monday at 02:49 AM Posted Monday at 02:49 AM Earlier on the Germans had a bit of a monopoly on it..Nev 1
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