two reusable lunar landers<\/a>\u2014SpaceX’s Starship and Blue Origin’s Blue Moon.<\/p>\nThe principal difference is the contracting method, and Martin uses\u2014albeit in bureaucratic terms\u2014harsh language for NASA’s choice of cost-plus contracting. Cost-plus contracts are intended to be used in experimental and cutting-edge technology programs, such as the construction of the James Webb Space Telescope. But in this case, Aerojet was modifying engines that had flown multiple times on the space shuttle program; and Northrop was modifying boosters that were similarly used many times.<\/p>\n\n Advertisement <\/span> <\/p>\n<\/aside>\n“The agency\u2019s reliance on cost-plus awards increases its financial risk,” Martin wrote. “In our judgment, NASA has used cost-plus contracting structures for its SLS booster and engine contracts to a greater extent than warranted. Although the SLS is a new vehicle, its heritage boosters and RS-25 engines are well-established.”<\/p>\n
Cost-plus contracts pay the recipient the total amount of their costs plus a fee. This is in contrast to the fixed-price contracts NASA has given SpaceX and Blue Origin for landers, the design of which is much more experimental and cutting-edge in nature than repurposing space shuttle hardware.<\/p>\n
The new report also takes issue with the fees awarded as part of the propulsion contracts. For example, even though Aerojet delivered only five of 16 of the refurbished RS-25 rocket engines by the end of its contract, it was rated “very good” by the space agency for this subpar work.<\/p>\n
Costly engines<\/h2>\n There are other head-scratching issues raised by the report. For example, the current cost of manufacturing a new RS-25 main engine\u2014which will be used for the Artemis V mission and onward\u2014is about $100 million. NASA and Aerojet are trying to achieve a 30 percent cost savings by the end of this decade, bringing the cost down to $70.5 million.<\/p>\n
However, in projecting these savings, Martin notes that NASA neglected to include some costs: “When calculating the total cost of the new RS-25 engines, NASA and Aerojet are only including material, engineering support, and touch labor (hands-on labor effort), while project management and overhead costs are excluded.” Who knows, maybe Aerojet’s managers will work for free for a few years.<\/p>\n
Compared to the private sector, even getting the cost of an RS-25 engine down to $70.5 million is a preposterously high price. Blue Origin manufactures engines of comparable power and size, the BE-4, for less than $20 million. And SpaceX is seeking to push the similarly powerful Raptor rocket engine costs even lower, to less than $1 million per engine.<\/p>\n
Based on all of the new data in his latest report, Martin said his office has had to revise its estimate of the total cost of a Space System Launch, inclusive of ground systems and the Orion spacecraft. It is now $4.2 billion.<\/p>\n<\/p><\/div>\n
<\/br><\/br><\/br><\/p>\n
Food, Health, Science, Space, Space Craft, SpaceX<\/br>https:\/\/arstechnica.com\/space\/2023\/05\/a-new-report-finds-nasa-has-spent-an-obscene-amount-of-money-on-sls-propulsion\/<\/a><\/br><\/br><\/p>\n","protected":false},"excerpt":{"rendered":"Source:https:\/\/arstechnica.com\/space\/2023\/05\/a-new-report-finds-nasa-has-spent-an-obscene-amount-of-money-on-sls-propulsion\/ A new report finds NASA has spent an obscene amount of money on SLS propulsion 2023-05-30 22:00:14 Enlarge \/ NASA conducts a test of an RS-25 rocket engine on the A-1 Test Stand at Stennis Space Center. NASA An independent report published Thursday contained troubling findings about the money spent by the agency on […]<\/p>\n","protected":false},"author":1,"featured_media":33535,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"nf_dc_page":"","om_disable_all_campaigns":false,"pagelayer_contact_templates":[],"_pagelayer_content":"","_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[103,32,26,33,105,36],"tags":[],"class_list":["post-33534","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-food","category-health","category-science","category-space","category-space-craft","category-spacex"],"yoast_head":"\n
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![\"NASA](\"https:\/\/i0.wp.com\/cdn.arstechnica.net\/wp-content\/uploads\/2018\/08\/SSC-2015-00064_large-800x533.jpg?resize=800%2C533&ssl=1\")
![Enlarge<\/a> \/<\/span> NASA conducts a test of an RS-25 rocket engine on the A-1 Test Stand at Stennis Space Center.<\/div>\nNASA<\/p>\n<\/figcaption><\/figure>\n](\"https:\/\/cdn.arstechnica.net\/wp-content\/uploads\/2018\/08\/SSC-2015-00064_large.jpg\"){kind=link}