On 01/25/16 2:38 PM, Henry Spencer wrote:
On Mon, 25 Jan 2016, John Dom wrote:
Those with the canonical mindset (am learning English!) claiming
LH2 / LO2 is silly for first stages should look at Ariane V.
Ariane 5's LOX/LH2 core is its second stage -- the SRBs are its
first. (Yes, the core engine is running at takeoff, but it's less
than 10% of the total thrust -- until the SRBs burn out, they're
doing almost all the work.)