engineering – Page 256 – Behind The Black

Apparent Iran launch failure

August 29, 2019 9:54 am Robert Zimmerman

Just released satellite photos showing fire and smoke at an Iranian launchpad suggest that a rumored attempt by Iran this week to launch a satellite into orbit resulted instead in a launchpad failure.

[S]atellite images by Planet Labs Inc. showed a black plume of smoke rising above a launch pad there, with what appeared to be the charred remains of a rocket and its launch stand. In previous days, satellite images had shown officials there repainted the launch pad blue.

On Thursday morning, half of that paint apparently had been burned away. “Whatever happened there, it blew up and you’re looking at the smoldering remains of what used to be there,” said David Schmerler, a senior research associate at the Middlebury Institute of International Studies.

Schmerler told The Associated Press that the images of the space center suggested that the rocket either exploded during ignition or possibly briefly lifted off before crashing back down on the pad.

In July Iranian officials had said they would do three launches this year, with a communications satellite launch expected before the end of the summer. It would appear that this failure is of that launch.

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NASA Inspector General to Congress: Free Europa Clipper from SLS

August 29, 2019 8:44 am Robert Zimmerman

In a letter to Congress on August 27, 2019, NASA’s inspector general has called for Congress to immediately abandon the legal requirement it imposed on Europa Clipper to fly on NASA’s SLS rocket, thereby allowing NASA to choose any commercial rocket to launch the spacecraft.

The letter [pdf] is amazingly blunt.

[W]e write to highlight an issue at NASA that we believe requires immediate action by Congress. Language in NASA’s appropriation legislation requires the Agency to launch a satellite to Europa, a moon of Jupiter, in 2023 on the yet-to-be-completed Space Launch System (SLS) rocket. However, because of developmental delays and, more significantly, NASA’s plans to use the first three SLS rockets produced for its Artemis lunar program, an SLS will not be available until 2025 at the earliest. Consequently, if completed on its projected schedule, the approximately $3 billion dollar Europa spacecraft (known as “Europa Clipper”) will need to be stored for at least 2 years at a cost of $3 to $5 million per month until an SLS becomes available. NASA recently added $250 million in Headquarters-held reserves to the project to address these storage and related personnel costs.

Congress could reduce risks to both the Europa mission and Artemis program while potentially saving taxpayers up to $1 billion by providing NASA the flexibility in forthcoming fiscal year (FY) 2020 appropriations legislation to determine the most cost effective and timely vehicle to launch the Europa Clipper mission in 2023 or whenever the satellite is completed.

As blunt as the letter is, the wording above is also very careful to hide the fact that the $1 billion savings will come, not from avoiding the launch delay, but from buying a private commercial launch vehicle (estimated launch cost about $100 million) versus using SLS (estimated launch cost of $1 billion to $4 billion).

Will Congress take this advice? It should, though I am pessimistic. Our Congress has not shown much interest in doing the smart thing when it comes to SLS for about a decade. Why should things change now?

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SpaceX begins hunt for Starship landing sites on Mars

August 28, 2019 3:07 pm Robert Zimmerman

Candidate landing sites for SpaceX's Starship

In the August image release from the high resolution camera of Mars Reconnaissance Orbiter (MRO) were five images whose title immediately caught my interest:

The overview map on the right shows the location on Mars for these five photographs. The second and third images are of the same location, taken to produce a stereo pair.

To put it mildly, it is most intriguing to discover that SpaceX is beginning to research a place where it can land Starship on Mars. I immediately emailed Nathan Williams, the JPL scientist who requested these images from SpaceX, but he was bound by a non-disclosure agreement with SpaceX and could not comment. I have since tried to get some information directly from SpaceX but so far the company has not responded. A 2017 news story had indicated the company’s interest in this Mars’ location, but gave no details either.

Based on what we now know of Mars, however, it is possible to figure out why they favor this location, on the border between the two large northern lowland plains Arcadia and Amazonis Planitia.
» Read more

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Engineers attach test helicopter to Mars 2020

August 28, 2019 2:41 pm Robert Zimmerman

Engineers have now attached to the Mars 2020 rover the test helicopter that will attempt to make the first air-born flight on another world.

The Mars Helicopter is considered a high-risk, high-reward technology demonstration. If the small craft encounters difficulties, the science-gathering of the Mars 2020 mission won’t be impacted. If the helicopter does take flight as designed, future Mars missions could enlist second-generation helicopters to add an aerial dimension to their explorations.

“Our job is to prove that autonomous, controlled flight can be executed in the extremely thin Martian atmosphere,” said JPL’s MiMi Aung, the Mars Helicopter project manager. “Since our helicopter is designed as a flight test of experimental technology, it carries no science instruments. But if we prove powered flight on Mars can work, we look forward to the day when Mars helicopters can play an important role in future explorations of the Red Planet.”

If this works on Mars, MiMi Aung will be in a position to win contracts for similar helicopters for the rest of her life. It seems to me that this project has been her baby from the beginning.