I wouldn't be so quick to call for stopping Proton. Since 2000 inclusive, there have been 119 Proton launches. This is only the second actual Proton failure during that span (a third failed to reach orbit due to the DM-03 propellant overloading in 2010). The other six failures involved upper stages after reaching orbit - many of them the same upper stages that will fly on Angara. - Ed Kyle
Quote from: clongton on 07/02/2013 12:21 pmDon’t be so quick to call for the retirement of the Proton. It has had 2 launch vehicle failures in 119 flights, which is not too terribly different than 2 launch vehicle failures in 135 flights for Shuttle. And don’t say anything like “but they are 2 entirely different kinds of vehicles” because when the launch sequencer reaches zero on any vehicle, it is the entire launch system that is igniting. Proton is not “just” a rocket, it is a launch system that has a very respectable mission history, including Zarya, the 1st module of the ISS. You may not like what it uses for propellants but there is no denying that it works, and works well. I disagree with you... past success doesn't mean you continue doing the same thing. We had many successful Titan launches yet we moved on. Had many successful Shuttle launches... We moved on.
Don’t be so quick to call for the retirement of the Proton. It has had 2 launch vehicle failures in 119 flights, which is not too terribly different than 2 launch vehicle failures in 135 flights for Shuttle. And don’t say anything like “but they are 2 entirely different kinds of vehicles” because when the launch sequencer reaches zero on any vehicle, it is the entire launch system that is igniting. Proton is not “just” a rocket, it is a launch system that has a very respectable mission history, including Zarya, the 1st module of the ISS. You may not like what it uses for propellants but there is no denying that it works, and works well.
I ask because in both this and the recent Sealaunch failure there is the appearance of the vehicle "attempting" to put distance between itself and the pad, during an albeit-brief period of horizontal flight. Is that just getting lucky, or is there a flight control mode that facilitates that?
There's talk of a 200-meter crater. I consider that to be credible. But I want pictures!!The crash of a much SMALLER rocket with identical fuel, in 2006,created a football-field-sized crater -- and MSNBC had EXCLUSIVE private photographs from a source at the launch site. See http://www.nbcnews.com/id/14346394/
I'm shaking my head right now, having just come from the comments page of the Independent, the paper I read the most. Over half the comments so far have claimed that this is US sabotage in revenge for the Edward Snowden affair. This is the sort of hyper-political shallow mindset that makes me despair sometimes.
Quote from: Prober on 07/02/2013 02:49 pmQuote from: clongton on 07/02/2013 12:21 pmDon’t be so quick to call for the retirement of the Proton. It has had 2 launch vehicle failures in 119 flights, which is not too terribly different than 2 launch vehicle failures in 135 flights for Shuttle. And don’t say anything like “but they are 2 entirely different kinds of vehicles” because when the launch sequencer reaches zero on any vehicle, it is the entire launch system that is igniting. Proton is not “just” a rocket, it is a launch system that has a very respectable mission history, including Zarya, the 1st module of the ISS. You may not like what it uses for propellants but there is no denying that it works, and works well. I disagree with you... past success doesn't mean you continue doing the same thing. We had many successful Titan launches yet we moved on. Had many successful Shuttle launches... We moved on. If it ain't broke then don't fix it. Proton isn't broken. Almost all current and previous launch vehicles have had more failures than Proton. The engineers will figure out what caused this particular incident and make the necessary changes to ensure that this anomaly won't happen again.
The design is showing its age as Russia tries to do more with this ancient design.
The only reason Proton is still in service is because Angara keeps getting delayed.
The problem isn't an old design. The problem is the toxicity combined with overland launch.
Here's the crater from the Proton-M crash in 2007:
easy JimO this is the space age or google maps age? should be easy to get high res pictures by some private sat company.
Quote from: Kabloona on 07/02/2013 10:41 pmHere's the crater from the Proton-M crash in 2007:Any idea of the scale? I can see no known-sized objects.
Well, I want them NOW.Let me go check ISS daylight passes. But a 200 meter crater might not be an easy target for handheld cameras.