Awesome.... but I can't help but notice the logo is covered in a sheet of ice, thanks to the chilled RP1
Quote from: NovaSilisko on 09/25/2015 01:42 amAwesome.... but I can't help but notice the logo is covered in a sheet of ice, thanks to the chilled RP1 No kidding! I wonder if the added mass of ice from condensation will make a difference in the mass of the vehicle?
Quote from: ChefPat on 09/25/2015 03:05 pmQuote from: NovaSilisko on 09/25/2015 01:42 amAwesome.... but I can't help but notice the logo is covered in a sheet of ice, thanks to the chilled RP1 No kidding! I wonder if the added mass of ice from condensation will make a difference in the mass of the vehicle?I think most of the ice falls in the first moments of launch.
Why is the logo on the rocket so important?
Quote from: Lars-J on 09/25/2015 05:07 pmWhy is the logo on the rocket so important?'cause it's cool.
Question: does spacex have to issue an official report that needs to be signed off by faa (or some other agency) before they can RTF? (would such a report have to be public?)Or is spacex free to launch whenever they (and their customer) are ready?Thank you
I believe large rockets are regulated under experimental aircraft category,
I am really confused about this temperature of liquid oxygen. Triple Point of Oxygen is 54.36°K or -361.8°F at 146.27Pa or 0.0014 atmospheres or 0.0212 lbs/sq in. http://coolprop.sourceforge.net/fluid_properties/fluids/Oxygen.htmlOxygen has a freezing point of 54.36 K (−218.79 °C; -361.82 °F) and a boiling point of 90.19 K (−182.96 °C; −297.33 °F) at 101.325 kPa or 1.0 Atm. https://en.wikipedia.org/wiki/Liquid_oxygenSo coincidentally freezing point at 1 atm is about the same as the triple point. I don't think the properties of oxygen at 0.0014 atm are at all relevant, what is important it that it is close to and above freezing point at the pressures it will be stored and used at.So can somebody explain why the term Triple Point is used instead of Freezing Point, which I think is both more understandable and relevant.
Quote from: Lars-J on 09/25/2015 05:07 pmWhy is the logo on the rocket so important?So you can find the pieces.
Quote from: Jim on 09/25/2015 08:52 pmQuote from: Lars-J on 09/25/2015 05:07 pmWhy is the logo on the rocket so important?So you can find the pieces.Jim tropes aside...lt's a valid point. It is easier to identify tank wreckage when said wreckage has a logo on it, than when it does not.
Spacex will attempt to land the first stage, with full thrust engines, on Return To Flight. As I understand it the previous engines had too much thrust for landing, so that even a throttled down single engine provided thrust greater than the weight of the first stage. This requires the "hoverslam" landing with little room for error.Will this problem be even worse with the full thrust engines or will they be able to throttle down a greater percentage to eg equal the minimum thrust of the previous engines?