/sci/ - Science & Math

>>12768361
>”But the F-1A would have been expensive. Rocketdyne estimated that activation of the production line would cost $315 million in 1991 dollars. A significant chunk of that money, $100 million, would be required to pay for four test engines and a spare. These costs apparently did not include reactivation of the special test stands that had been used for the F-1.“
>”The per-unit cost for a production engine was difficult to estimate, however, because it depended upon the quantity ordered and the production rate. Rocketdyne estimated that the cost of each engine would be $15 million, assuming an order of 40 or more engines at a rate of 10–12 a year. But with the Space Exploration Initiative dead, further study of restarting F-1 engine production ceased.“

>>12758824
Not gonna lie some Hypergolic propellants have great ISP. The engines on Proton range from 315-329 seconds. Anyhow I love proton. Rockets with too many stages are fun and making “lego rockets” speaks to me spiritually.