Jay Fortner
972 posts
Jay Fortner
@That1Polski
Space nerd among other things
Katılım Ocak 2018
260 Takip Edilen167 Takipçiler
The clock has returned to a counting state on target for 5:30 PM CT.
StarbaseTracking@TrackingTheSB
Flight 12's T-0 is set as "TBD" on SpaceX's website. Its unclear is this is intentional or a bug.
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@TJ_Cooney Curious if it is unable to maintain attitude with the asymmetric thrust resulting from an engine out scenario. Would be a little surprising but could explain why they couldn’t complete the burn with one
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"one of the BE-3U engines didn’t produce sufficient thrust to reach our target orbit"
Dave Limp@davill
Now that we have a more complete view, we wanted to provide an update on our NG-3 mission. While we are pleased with the nominal booster recovery, we clearly didn't deliver the mission our customer wanted, and our team expects. Early data suggest that on our second GS2 burn, one of the BE-3U engines didn’t produce sufficient thrust to reach our target orbit. Blue Origin is leading the anomaly investigation with FAA oversight to learn from the data and implement the improvements needed to quickly return to flight operations. We have been in steady communication with the team at AST SpaceMobile, we appreciate their partnership, and we’re looking forward to many flights together.
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@paxunova @the_creature107 @Truthful_ast Wouldn’t be surprised if SpaceX has been cooking something up in the background
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@the_creature107 @Truthful_ast Not unless they can miracle up another suit from somewhere within a year and a half.
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@_Testflight_ Next up: 600th reflight of an orbital class rocket
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MAN WHAT THE HELL ARE THESE WEELS DOING 😭😭😭
Arthur@Arthurs_rockets
I give up I'm sending a rover
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@KenKirtland17 Based on the orbit data I’ve seen the satellite is pretty much dead. It has a decent amount of delta V but nowhere near the thrust to compete with the drag at perigee
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On orbit relights and maneuvers are very hard. Sad to see this one didn’t go the way it was intended, but hopefully the payload is okay enough to be partially successful, and they’ve learned something for next launch.
IIRC GS2 did some complex relights on flight 2
Blue Origin@blueorigin
NG-3 Update: We have confirmed payload separation. AST SpaceMobile has confirmed the satellite has powered on. The payload was placed into an off-nominal orbit. We are currently assessing and will update when we have more detailed information.
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@AtmoPierce @chet_wiltshire @planet4589 @blueorigin @AST_SpaceMobile That delta V with that thrust and the 6.1 ton public mass of the satellite would require over 100 days of continuous propulsion to achieve. No chance at saving it if this is its true orbit
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@chet_wiltshire @planet4589 @blueorigin @AST_SpaceMobile If they only had to circularize, maybe.
Inclination change: 13.300 deg
Circularization-only dV: 97.210 m/s
Total required dV: 1755.311 m/s
Available dV: 202.020 m/s
dV margin: -1553.291 m/s
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The @BlueOrigin @AST_SpaceMobile launch has been tracked by Space Force as catalog 68765, 2026-85A, in a 154 x 494 km x 36.1 deg orbit. Epoch is 1138 UTC which is the time of SECO-1, so this may not be the final orbit. (If it is, then they are indeed toast).
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@OmniAeronautica @EraserheadCap @blueorigin So many thing wrong with this. It was T-4, not T+4, and even if it was T+4, that would put it after stage separation not before
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Rewatched the @blueorigin launch video and found it interesting that within 4 minutes from launch, someone in mission control said “ya we do not understand the full impact, whether it’s full loss of a functionality or redundancy therein”. Who has ideas on what this means? $ASTS
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@Mal_active @aphesming @laufyx @Lyrask1 Tbh I would probably try to find a gravity assist around the Mun
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@aphesming @laufyx @Lyrask1 Nah, it's way less if you don't change inclination directly. It's way more efficient to raise apoapsis to the edge of the SOI of Kerbin, coast, and change inclination to 90° at AP, then lower AP again
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@Arthurs_rockets That’s just a result of using a prop, blades rotating downwards produce more thrust than those rotating up, meaning you have asymmetric thrust and a yaw moment towards the ascending blade, especially at high power. That’s why having a decent rudder/vertical stab is important
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@That1Polski It flies decently but it just yaws to the right for some reason🤷♂️
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@CoversEuanD @Flight2Starship All of the engines are static fired before being put on the vehicle. The only purpose of on vehicle static fires is to verify delivery and ignition systems function, which a short static fire does just fine. Anything longer just causes unnecessary wear to the flame trench
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@Flight2Starship I hope so but a 4-5 second SF seems short. We shall wait and see 🙌
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@blueorigin Max-Q at 1:36 really demonstrates the low TWR at liftoff
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@kez611_ @megagoose11 Time warp to the proper orbital alignment for the direction you want to burn
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Just launched a probe to Jool with no reaction wheels, no torque in the probe part and no gimbal on the engine
GIF
Goose@megagoose11
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@jaketropolis Kerbal scientists when they figure out that space near Gilly is just as much of a vacuum as space near Kerbin
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Kerbal scientists cracking the secret of nuclear rocket engines after learning that the space over Duna is cold.
GIF
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@KerbalNut @SpaceX Usually when SpaceX posts about static fires it means they went well so probably expected
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@moejama64 Probably doable with a Jupiter gravity assist, only need about 11-12 km/s of delta v for that. Also could use Venus and Earth gravity assists. A straight sun dive from Earth is just about the least efficient way to do it and not really possible with any current rocket
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@elchuchii @ControlledPairs @firefly_actual Can still put 3 relays in a lower non-synchronous orbit to cover most of them
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@ControlledPairs @firefly_actual Unfortunately, mun and minmus have impossible geostationary orbits since they are outside their sphere of influence
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I decided to establish a comms constellation around Kerbin using three equally spaced relay satellites in geostationary orbits.
It was a single launch mission. I circularized at 2,863,334 meters above Kerbin, which places the orbital period at 6 hours - the same duration as a Kerbin day. This gives the appearance that the satellite hovers over one spot on the planet.
I launched the first relay there, then burned retrograde to reduce the periapsis until my instruments reported a 4 hour orbital period - 2/3s of a Kerbin day.
Once I got back around to apogee, I launched the second relay and circularized, then did it once more for the final relay.
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