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Comment: Re:ATC (Score 1) 330

by MichaelSmith (#48443175) Attached to: Eizo Debuts Monitor With 1:1 Aspect Ratio

Nah the monitors had individual co-ax connectors for RGB. It was a simple interface if you had the computing muscle to drive it. Not so easy in the early 1990s. The monitors had a serial interface which was proprietary to sony. It was there to shut down the HMI if the monitor stopped working. You could use the monitor without it if you wanted to.

Comment: Liquid fuels (Score 4, Informative) 594

by MichaelSmith (#48291955) Attached to: Space Tourism Isn't Worth Dying For

I looks like the hybrid solid/liquid engine isn't going to push SS2 to 100km altitude. The original compound ran rough and it doesn't have a high enough specific impulse. The new compound explodes. Dick Rutan demonstrated a Long-EZ equipped with a liquid fueled engine in 2001. I think it is time to go back to XCOR and ask about a bigger engine.

Comment: Re:So first plastic solid rocket design status is. (Score 1) 112

by MichaelSmith (#48289329) Attached to: SpaceShipTwo Pilot Named; Branson Vows To 'Move Forward Together'

Frame 2 from the ground based photos seems to show that thrust from the engine reduced before the explosion. I wonder if something came loose and obstructed the outlet of the engine, causing an increase in pressure. Sort of a blowback situation.

Comment: Re:ground based pics of ss2 breakup (Score 3, Interesting) 112

by MichaelSmith (#48289269) Attached to: SpaceShipTwo Pilot Named; Branson Vows To 'Move Forward Together'

Consistency is a big issues with solid fuels. The shuttle SRBs were paired during construction, and the fuel was poured at the same rate into each engine from the same source. That way if the engine developed more or less thrust because of a variation in the consistency of the solid fuel, it would happen on both sides of the shuttle. Liquid fuels mix themselves, but a mixing problem is locked in to solid fuels until you burn them. I just wonder if a mistake was made during construction which caused a sudden increase in engine pressure, above that caused by the greater efficiency of this new fuel.

10.0 times 0.1 is hardly ever 1.0.

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