[Professor Mega-Mind (OP)]

.Best Spaceship Design has the friction drive .
P.

[Bored chemist]

.Best Spaceship Design has the friction drive .
P.

There is no friction in space.
The worst spaceship has your "friction drive"

This entire thread arose from your steadfast refusal to actually find out what the science tells you.
And that is because you are too dim to realise that you know too little.

[Professor Mega-Mind (OP)]

Consider it a long-term research project .
D.

[opportunity]

Your tone suggests its a non-event, right?

Live there.

That's scary though....eliminating the possibility.

[opportunity]

That's so...."I need to believe in the big bang"......

[Bored chemist]

Consider it a long-term research project .
D.

If you refuse to learn- as you did- it's going to be very long term and not much research.

[Kryptid]

It's time to stop screaming " I do formulas better than you ! " , and acknowledge the creative-mechanical genius which birthed this triumph ! 

..............Illusion......
Alright , I have to backtrack a bit .  Convertalot is backing up that 2x bit , counter-intuitive though it is .

So how did that humble pie taste?

[Professor Mega-Mind (OP)]

Like an English Beat song !
Had to risk pride , to ignore the orthodoxy .  But hey , maybe in 300 years ?
P.

[Bored chemist]

Had to risk pride , to ignore the orthodoxy

Ignoring the orthodoxy is only a good idea if  you  understand it first.
Otherwise you just make a fool of yourself.

[Professor Mega-Mind (OP)]

I'm man enough to risk it . Besides, there's a silver lining to the cloud ; the possibility of future progress along the "Drum-beating" pathway .
P.M.

[Bored chemist]

the possibility of future progress

No.
That was ruled out a hundred years ago.
Momentum is a conserved quantity because of one of the symmetries of the universe.

You are being silly again.

[Professor Mega-Mind (OP)]

Ruled out by Bonobos that just left the cave .  Quantum effects may indeed provide a way to displace or  disperse kinetic energy without inducing a reciprocal reaction .  I do not have that lever at hand , but in future , someone will .  There's always a run-around , witness man flying all over the freakin' place !
OK , speech over !  Will be concentrating on reaction drives from now on .
D.

[Professor Mega-Mind (OP)]

.......Reaction vs Reactionless
 Can you choose wisely ?
See "Can An Impulse Engine Be Made ?" .
P.

[Bored chemist]

There's always a run-around , witness man flying all over the freakin' place !

No
You really should learn what you are talking about, rather than posting nonsense.

[Professor Mega-Mind (OP)]

Hold that thought for 300 years !
P.

[Bored chemist]

Hold that thought for 300 years !
P.

Do you think that 2+2=4 will not be true in 300 years?
Or do you understand that mathematical proofs are "forever"?

[Professor Mega-Mind (OP)]

There will be other factors at play then .
P.

[Bored chemist]

There will be other factors at play then .
P.

Yes, but they won't breach the conservation of momentum.

[Professor Mega-Mind (OP)]

True , they would only appear to .  I am off that for now , Earth's technology lacks the grip on space that is necessary to make it work here .  I retire from the attempt .
P.M.

[opportunity]

A reactionless drive is possible in theory, yet it requires eliminating the idea of "antiparticles".

Consider: https://en.wikipedia.org/wiki/Alcubierre_drive

Also consider: https://en.wikipedia.org/wiki/Dirac_sea

Anti-particles aimed to explain the idea of "negative energy", yet we have no proof in science of the existence of anti-particles, because of the annihilation principle with matter. Very convenient, right?

The issue in by-passing the idea of anti-particles is to consider how mass is associated to gravity as negative energy and how this is then associated to EM.

If I may, I've a paper on this: http://vixra.org/abs/1807.0215