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Hi All, Can anyone tell me how you'd get the exhaust velocity for a multistage rocket? The only thing I can see in the multistage files is the thrust in newtons so, how can I get the exhaust velocity from that? Thanks all!

Hi all, As I've now got a bit more time on my hands I'm playing around with orbiter again and still trying to get my head around some of the math. I've got the formula for launching Northeast/on the ascending node for an ISS flyover but what I don't understand is how to change that forumla so...

Source: https://www.theguardian.com/culture/2016/jun/19/anton-yelchin-star-trek-actor-dies-car-crash No other vehicles involved and he was found in his driveway? To me this sounds more like a suicide than a traffic accident, either way, it's a terrible loss.

Hello everyone, I'm Gary and I'm addicted to simulators. I think that this realisation came to me somewhere near Berlin when I was driving a Volvo FH16 with a load of tomatoes on the back - this being ETS2 of course and not real life! Over the course of the weekend I'd driven around part of...

The other night, I was trying to work out how much altitude gain I'd get with a given amount of thrust from a space vehicle and I couldn't work it and nor could I find an equation that would give me the result I was after. So, can someone please provide me with an equation that I can use to...

Pretty cool flying. I wonder if anyone wants to make a UMMU wingsuit for orbiter? :)

Not as dramatic as the media are stating but pretty cool to watch although the landing is not the flight crews best. :) http://www.bbc.co.uk/news/uk-30625945

I didn't realise that that Martian parachutes were getting so big that they didn't have wind tunnels big enough to test them. Crazy/interesting way to test a chute!

Following on from the Heathrow Dreamliner fire and a few other issues these two stories appeared close to each other. source: http://wkzo.com/news/articles/2013/sep/23/norwegian-air-calls-in-boeing-for-meeting-after-dreamliner-woes/ and

The plane on fire at SFO is a Boeing 777 operated by Asiana in from Taipei. No information on what has happened but it looks like the emergency slides were deployed. San Mateo Fire Department: People trapped on board Boeing 777 plane that crashed at San Francisco Int'l Airport.

Lots of speculation, lots of passengers with the normal 'I thought we were all doing to DIE!!' type statement. Pictures are starting to emerge. It looks like a bird strike to both engines with fire bottles discharged into the left engine but the right left running to allow them to limp back to...

Background: The Themis-1 mission was conceived after a discussion between ISA and Lortech/Woo Aerospace as they had a new rocket they were asking ISA to test and ISA had a payload of opportunity in the shape of the Landmod skycrane stay lander for Mars missions. Themis-1 Mission: Once the...

Everytime I watch one of these 'end of the world' scenario movies I have to ask just where they are getting the supplies from. For example, In Terminator Salvation they've got A-10's, helicopters, bullets, grenades, etc but it's obvious that the infrastructure has been destroyed. So, without...

Source: http://en.ilmatieteenlaitos.fi/press-release/578751 I find it quite fascinating that computers today are able to model what goes on both on Earth and around it but they lost me at the six dimensions bit. I take it they are talking about the normal four dimensions but what are the other...

Source: http://spaceobs.org/en/2013/02/25/comet-c2013-a1-siding-spring-a-possible-collision-with-mars/ Even if it's a miss it's going to be quite the science opportunity.

This morning we've got very heavy fog and I suspect this crash would be up near Battersea heliport, probably on the approach which does come very close to several high rise buildings. With that tall building, a crane on top and dense fog it's pretty much a disaster waiting to happen. Source...

Makes it feel like something wonderful has gone extinct. Source and more: http://www.bbc.co.uk/news/magazine-20135674

Many years ago I read a short story about a guy who was basically a science fiction author either at a party or in a bar talking to someone. The story basically went like this: and that's the end of the story. Does anyone know who wrote it or what it was called? Thanks.

Source: http://www.wired.co.uk/news/archive/2012-10/11/universe-computer-simulation

Maybe someone with more electronics skills than I have can help me out here. I've got a network switch that has two insanely noisy fans in it. I decided to swap them out for some quieter ones. The ones that others have said that they've used were duly ordered and arrived today. I removed the...