If you're going to jump into the middle of a debate you should understand what is being debated. The original claim that I retorted was:Quote from: Chasm on 04/01/2017 04:18 pmThat makes comparisons harder and the SpaceX GPS launch costs are already on a steep rise. ULA would not get away with that trick.And ULA did, as the article I cited showed.
That makes comparisons harder and the SpaceX GPS launch costs are already on a steep rise. ULA would not get away with that trick.
So why does SpaceX have many government customers while ULA has one monolithic government customer? Afterall lets wind this back around to the post you originally took offense with.
Seems like they would need a minimum of 5 engines on the core to use the middle engine for throttling down to land a booster. 5 engines is close to New Glenn.
They could have 5 RS-27 engines on a 5m core. They could either parachute them like Vulcan or try to land the stage. The RS-27 is a little more powerful than the Merlin, but can it throttle? It would provide a little over 1 million lbs thrust. More than Atlas V, but may require a little more fuel. It could still be made to have strap on solids. Don't know why they didn't try this instead of buying the BE-4's. It could have been called Vulcan 5.
Why would if you are Spacex leave money on the table? [....]
Quote from: Coastal Ron on 04/01/2017 09:40 pmIf you're going to jump into the middle of a debate you should understand what is being debated. The original claim that I retorted was:Quote from: Chasm on 04/01/2017 04:18 pmThat makes comparisons harder and the SpaceX GPS launch costs are already on a steep rise. ULA would not get away with that trick.And ULA did, as the article I cited showed.This discussion goes back over 7 years. Been knee-deep in it since before you were around.
In the past? Yeah, certainly as the commercial market went bust and the government decided to decide things once more. Today? I really doubt it.April 2016 GPS contract: This is a firm-fixed price, standalone contract with a total value of $82,700,000.March 2017 GPS contract: This is a firm-fixed price, standalone contract with a total value of $96,500,490.~16% increase a year, no additional requirements as far as I know. If SpaceX keeps that up ULA should be competitive in no time at all.
You don't believe that ULA increased prices, and I've shown they have.
Seems like they would need a minimum of 5 engines on the core to use the middle engine for throttling down to land a booster. 5 engines is close to New Glenn. Otherwise, they could use the old RS-27 or H-1 engine from Saturn I and Delta II on a larger core like SpaceX. They are going to eventually have to get away from the Russian engines. Newer engines being developed by SpaceX and Blue Origin are metholox engines at around 500,000 lbs + thrust. I don't know if they have even started on the AR-1, and it is also a 500k thrust engine.
Quote from: spacenut on 04/01/2017 02:52 pmSeems like they would need a minimum of 5 engines on the core to use the middle engine for throttling down to land a booster. 5 engines is close to New Glenn. Otherwise, they could use the old RS-27 or H-1 engine from Saturn I and Delta II on a larger core like SpaceX. They are going to eventually have to get away from the Russian engines. Newer engines being developed by SpaceX and Blue Origin are metholox engines at around 500,000 lbs + thrust. I don't know if they have even started on the AR-1, and it is also a 500k thrust engine.They can also go with smaller landing engines. Ursa Major and Masten are both working on LOX/Methane engines in the 25klbf class (staged combustion for Ursa and expander cycle for Masten). There's nothing that says you have to use all the same engine size, especially if there are other customers for that engine size to keep the production rates up.~Jon
You want to lay blame or point a finger, look to DoD/USAF; that's where the buck stopped.
ULA has never been a typical commercial enterprise.
ULA has always been a USG captive;
...formed by request and consent of the USG, subject to the whims of the USG, and hand-cuffed by the codicil's of its parents.
So should they proceed with the expendable Vulcan knowing what SpaceX and Blue Origin have accomplished in the field of reusability?
Sorry, I've worked for DoD contractors (and worked closely with program managers), and I know better.
Quote from: Coastal Ron on 04/02/2017 05:27 amSorry, I've worked for DoD contractors (and worked closely with program managers), and I know better.Your assertion that " I've worked with..." counts for squat without evidence or cites. You have not provided either, so why should anyone believe your assertions or opinions over demonstrable facts?
The Saturn IB worked fine with 8 engines. The Saturn V worked fine with 5. I don't understand the fear of having multiple engines with today's computers. It worked back then. Only recently (the last 20 years or so) do they want single engine rockets, or at most two engines, or 3 for a heavy version. BO and SpaceX both are either planning, or have built multiple engine rockets that work. It also seems that with multiple engines, one can use a center engine to land a booster.
Quote from: Coastal Ron on 04/01/2017 09:40 pmIf you're going to jump into the middle of a debate you should understand what is being debated. The original claim that I retorted was:Quote from: Chasm on 04/01/2017 04:18 pmThat makes comparisons harder and the SpaceX GPS launch costs are already on a steep rise. ULA would not get away with that trick.And ULA did, as the article I cited showed.This discussion goes back over 7 years. Been knee-deep in it since before you were around. What's your point? The article you cited is one of many possible, at best incomplete, and years late to the game. You implied ULA could get away with "that trick". I replied that they had not, and there are public records to show it. You want to debate history with yourself, knock yourself out; you'll lose.
As reported by Amy Butler over at AvWeek.QuoteThe Pentagon has declared that the Evolved Expendable Launch Vehicle (EELV) project has exceeded its original projected per-unit cost by 58.4%, triggering a rigorous review under the Nunn-McCurdy program oversight law.This is not meant to be a "the house is on fire!" post but rather a place to intelligently discuss the causes, effects, and potential solutions to this cost spike.Edit: sorry about the URL, was too tired last night and couldn't check NSF from work to discover my error.
The Pentagon has declared that the Evolved Expendable Launch Vehicle (EELV) project has exceeded its original projected per-unit cost by 58.4%, triggering a rigorous review under the Nunn-McCurdy program oversight law.