Re: gaetanomarano is once again showing his lack of basic knowledge

On Dec 28, 7:53 pm, gaetanomarano <m...@xxxxxxxxxxxxxxxx> wrote:

it's a too low altitude (only about 50% more than those reached by
some airplanes!) to use a small engine since the force of gravity is
pretty close to the sea level gravity



This is where you are completely clueless. The difference in the
force of gravity between sea level, 50 km and 100 km is minor.
Gravity decreases at 1/radius squared. This means that gravity at
100km is 97% of what it is at sea level

The delta-IV booster does not put the upperstage in "near orbital
speed" , only 62 % of it

The Ares I is no different than the shuttle. At SRB jettison, the
mass of the orbiter and ET with propellants is greater than the thrust
of the 3 SSME's. For Ares-1, at SRB jettison, the upperstage and
Orion are going higher and faster than the shuttle and the upperstage
with the J-2 has a higher thrust to weight ratio.

for the CLV, the SSME was only paired with a four segment SRB, but
since the Ares-I uses a 5 segment SRB that provides increase of 28%
more total impulse, the J-2 can be used.

I agree that the Ares I is a sub optimal vehicle, but it still CAN fly

.

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