Boeing to Launch First Commercial Crew Starliner Capsule on December 20th, 2019

a reply to: M5xaz

The SpaceX capsule that exploded was the same capsule that was on Demo-1, not brand new. It had been launched, gone threw re-entry and the splashdown. The capsule that tested the pad abort was brand new and there were no issues with the super Dracos performance, it was also before the design change to burst check valves(one use only).

We will see what happens next month when SpaceX perform the in flight abort at max Q.

The issue is the double standard. Boeing had an issue with the parachutes on the pad abort(yet still technically passed) and now the issue with its guidence, yet it appears their next launch will be crewed(if re-entry and recovery go as planned) despite their tests falling short.

SpaceX's requirements to get human rated are more rigorous than Boeing's. It also needs to be noted that Boeing will not do an in flight abort test before launch crew.

a reply to: M5xaz

You act like NASA is using hypergolic propellants is something new


NASA has been using hypergolic fuels (Mono methyl Hydrazine/ Unsymmetrical Di Methyl hydrazine with Nitrogen Tetroxide) almost 60 years starting with Gemini program. Apollo used hypergolic fuels for Service module egine and Reaction control system. The Lunar module was one big fuel tank using hypergolic fueld for descent and ascent engines

The crew would literally sleep on the ascent engine while on the moon

Did have a mishap during Apollo-Soyuz flight when the attitude thrusters were not shut down after reentry - thrusters continued to fire after parachute deployment . Fumes from thrusters were sucked into cabin when air valve opened to
admit fresh air into capsule

Crew suffered severe eye irritation and lung problem from fumes - some of the crew passed out from the exposure

Hypergolic fuels are a risk, just like all rocket fuels. Their storable compensates for their use against cryogenic fuels

a reply to: anzha

It had rained and scrubbed my landing site by the time it launched.

More info.

spacenews.com...

www.parabolicarc.com...