Boom is not a serious endeavor.
They have not committed to an engine. There is no engine commercially available to buy and no engine producer has committed to creating one.
They have not committed to an engine. There is no engine commercially available to buy and no engine producer has committed to creating one.
For it to have a chance the US gov. needs to do IP transfer and pair them with NASA for test as they did with SpaceX, more realistically simply twist Pratt&Whitneys arm a bit...