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The most practical concept at the moment is the turbine-based combined cycle, says Goyne. So, in this case, he says, a gas turbine or a turbojet engine used to takeoff on the runway and accelerate up to the scramjet takeover speed.
originally posted by: Quantum12
a reply to: 3danimator2014
3danimator2014, if you make it to Santa Monica we can swing by VandenbergAFB to watch a launch. I want to see one too!
originally posted by: netbound
Anyway, when they send up rockets from Vandenberg AFB you can often see the exhaust trail in the sky from Santa Monica, as well as other beach communities. You know the trails aren't from airplanes because they usually appear to go straight up into the sky.
originally posted by: BASSPLYR
a reply to: Bedlam
random question. how does one shower in space? is there like some space shammy you use or a giant sponge? always wanted to know.
also, is there nausea associated with the weightlessness initially or is it not so bad and more like swimming underwater?
This setup is not as simple as a regular match, but it is surprisingly reliable and has worked for six decades on hundreds of rockets. Yet on March 12, during the first attempt to launch the new Russian satellite for Earth observation, one of the "matches" failed to fire after the ignition command was issued. It was enough of a problem for the launch control system, which detected the lack of signal from the failed igniter, to call off the propellant injection into combustion chambers. The launch was aborted just a moment before liftoff, and the fully fueled rocket remained safely on the pad.
That's when the wooden PZU demonstrated another amazing quality: a quick turnaround. It took launch personnel in Baikonur Cosmodrome in Kazakhstan less than 24 hours to fix the ignition system, re-fuel the rocket, and go for another attempt on March 13, which was successful. If some more complex ignition system had been involved, the mission would probably have to be postponed longer.
Over the years, rocket engineers around the world have invented new schemes to light up rocket engines, with some even involving lasers. However, the long-running Soyuz that still carries people and satellites to orbit relies on its 1950s-era design. By most accounts, PZU is the only surviving component in today's rockets that is made out of wood.
originally posted by: wildespace
And just for a size reference for the OP's video: