Hi, Allen Prunty!
I read your message from 29.09.2016 04:25

 AK>> When they built rockets in 1950s rockets also blew up without
 AK>> visible reason. So statistic is needed. It's like in
 AK>> mathematics -- for calculating of the a trajectory they need at
 AK>> least three points. If you have just one point you can have as
 AK>> much trajectories as you wish.

 AP> Considering that Space-X has a great track record so far this one
 AP> is a mystery... it blew up, from what I understand, when they were
 AP> putting the fuel in the rocket. It wasn't when it was fireing up or
 AP> anyhing... no source of heat. Then there's the mysterious POP sound
 AP> before the main explosion.

Well, on Earth hundreds of homes blow up every year because of stoves
working on natural gas. It is very typical sound when we have a blow of gas
mixture. As for safety, we can look at an article form February:

-----Beginning of the citation-----
03.02.16
SpaceX Keeps Aborting Liftoffs Because Rocket Fuel Is Tricky

SPACEX IS, DEPENDING on how you count, on its fourth or fifth attempt to
launch the SES-9 satellite. The first two launches both got scrubbed
because of the fickleness of superchilled liquid oxygen, which SpaceX is
betting will give its rockets an edge. Except when it comes to reliable
launch schedules, it seems.

The company debuted its upgraded Falcon 9 rocket with not just liquid but
superchilled liquid oxygen in December, which also ran into liquid oxygen
hiccups during launch. The Falcon 9 carries kerosene as fuel, but kerosene
needs oxygen to combust--and there's no oxygen in space. Rockets have to
bring their fuel and their oxygen.

Liquid oxygen, cooled to just below the element's boiling point of -297.3
degrees Fahrenheit, is already standard in high-powered rockets that launch
spaceships and satellites. Liquid oxygen is a thousand times denser than
gas, so its advantages are obvious--like a thousand-fold obvious. "It
makes the tank a lot smaller," says Angela Faulkner, an aerospace
analyst with Faulkner Consulting. Packing the oxygen in more densely means
more room for both oxygen and fuel, which in turn means a bigger payload
traveling further into space. "You want the most energy possible
because you want to boost up payloads," says Faulkner.

But liquefying oxygen adds complications, too. Now you need to insulate the
tank. You need a vent to allow any oxygen that heats up to boil off so it
doesn't blow up the tank. (All that swirling white "smoke" before
a launch is actually the cold liquid oxygen venting out and condensing
water vapor in the air1.) And you need to continuously top off any oxygen
that does escape before launch.

SpaceX is making it even harder on themselves--cooling the oxygen down
another 40 to -340 degrees F. The tradeoffs here are less obvious. Once
oxygen is already liquid, the density gains from cooling aren't as
dramatic, probably somewhere in the neighborhood of 10 percent based on the
properties of oxygen. (SpaceX declined to comment on specifics.) Keeping
the oxygen at -340 F, on the other hand, obviously has presented some
challenges to SpaceX.

But the company has reason to squeeze every bit room it can out of
supercooling oxygen. To achieve the dream of reusable rockets, those
rockets need extra fuel to steer themselves on the way down. Supercooling
the oxygen may just give it the rockets that edge. The satellite in this
upcoming launch needs to get especially far from Earth, depleting more fuel
than in December's launch with the successful landing. Tune in Friday to
see how it goes--weather and liquid oxygen willing.

1UPDATE 1:20 PM EST 3/2/16: This story has been updated to clarify what
liquid oxygen causes water vapor to condense into visible white
"smoke."

https://www.wired.com/2016/03/spacex-keeps-aborting-liftoffs-rocket-fuel-tricky/
----- The end of the citation -----

 AP> If you ask me I think sabotage is more the culprit here than
 AP> anything else. I am sure there's a lot of government officials who
 AP> don't want space x to be successful.

It's not necessary. In any way it will be too much to make a perfect rocket
from scratch. Experience always comes from overcoming errors. Similarly, it
is impossible to create  software free of blunders at once.

Bye, Allen!
Alexander Koryagin
UFO 2016

--- Paul's Win98SE VirtualBox