The Star Citizen Thread v5

[FuriousMeow]

I very much doubt gyroscopic precession has anything to do with it, but if you have a source it would be interesting to read

Certainly it's true that if the A-10's gun were off-centre then it would induce yawing, but the A-10's stabilization on first-stage trigger is pretty good.

The spin of the barrel would cause a gyroscopic precision effect like the rotation of a rotary engine. That's where the roll inducing would come from. Honestly, this is the first I've heard of roll inducement from the cannon spinning. I knew the weapon was designed and set off center-line so that the firing barrel was center line to prevent any pitch or yaw when the weapon was fired.

E: I had thought that phase 1 of the triggering system was just to bring the barrel up to speed to fire. At least I had read that somewhere.

 

[Osmanthus]

The spin of the barrel would cause a gyroscopic precision effect like the rotation of a rotary engine. That's where the roll inducing would come from. Honestly, this is the first I've heard of roll inducement from the cannon spinning. I knew the weapon was designed and set off center-line so that the firing barrel was center line to prevent any pitch or yaw when the weapon was fired.

Do you have a source for why the GAU-8 would have significant enough mass to cause precession-related effects on the A-10?

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E: I had thought that phase 1 of the triggering system was just to bring the barrel up to speed to fire. At least I had read that somewhere.

No, phase 1 engages the PAC. The A-10 is actively stabilized during the firing of the GAU-8, assuming the pilot has engaged those systems

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If you watched Bad News Baron before he stopped streaming SC (gave up until RSI/CIG adds fixes and content), you would see that many players made a loop of playing for 15 minutes, CTD, play for 15 minutes, CTD...over and over and over

I stand humbly corrected

 

[Moonax IRL]

you sound like you hant been keeping up with the development. its in alpha now man

I have a feeling you will be eating a lot of humble pie in the not too distant future, making assumptions about the future development of ED and its likely quality renders you critique meaningless waffle as you are just making it up as you go along. At the same time you show a complete lack of critical thinking in relation to the SC ponzi scheme e.g. grey market, never ending delays etc. You do realise the engine that SC uses is pushing 8yrs old and completely unsuited from the ground up for the purpose intended resulting in your choice of glitching,CTD and general hilarity, the whole thing has feet of clay.

 

[DLewth]

Do you have a source for why the GAU-8 would have significant enough mass to cause precession-related effects on the A-10?

This sort of thing tickles my brain, so I've back-of-enveloped it
Mass per barrel: 23.58 Kg, x7 = 164.36, add a bit for supports call it 180Kg
Rotational speed 600 rpm
Assembly diameter I just eyeballed from photos, about 50 cm
Plug them into a flywheel calculator and pick the mid-point of the ring/disk mass distribution (it's an imperfect flywheel) and you get about 16KJ

For comparison, that's the energy equivalent of two silverback gorillas riding a tandem at 20 mph. Probably enough to make the plane wobble when it spins up.

 

[Marak]

This sort of thing tickles my brain, so I've back-of-enveloped it
Mass per barrel: 23.58 Kg, x7 = 164.36, add a bit for supports call it 180Kg
Rotational speed 600 rpm
Assembly diameter I just eyeballed from photos, about 50 cm
Plug them into a flywheel calculator and pick the mid-point of the ring/disk mass distribution (it's an imperfect flywheel) and you get about 16KJ

For comparison, that's the energy equivalent of two silverback gorillas riding a tandem at 20 mph. Probably enough to make the plane wobble when it spins up.

Any maths that ends up with the answer of "Two sliverback gorillas riding a tandem" is awesome in my book

 

[Tippis]

For comparison, that's the energy equivalent of two silverback gorillas riding a tandem at 20 mph. Probably enough to make the plane wobble when it spins up.

That's… not the immediate image for comparison I would have thought of.

 

[Monk]

I have a feeling you will be eating a lot of humble pie in the not too distant future, making assumptions about the future development of ED and its likely quality renders you critique meaningless waffle as you are just making it up as you go along. At the same time you show a complete lack of critical thinking in relation to the SC ponzi scheme e.g. grey market, never ending delays etc. You do realise the engine that SC uses is pushing 8yrs old and completely unsuited from the ground up for the purpose intended resulting in your choice of glitching,CTD and general hilarity, the whole thing has feet of clay.

 

[Marak]

On a lighter note - I think we've had three whole pages without anyone trying to persuade people to "Buy an Idris!"

This thread is getting serious

(Or Asp E is on holiday...)

*Edit - missed one... (Please ignore the above post...)

 

[Osmanthus]

This sort of thing tickles my brain, so I've back-of-enveloped it
Mass per barrel: 23.58 Kg, x7 = 164.36, add a bit for supports call it 180Kg
Rotational speed 600 rpm
Assembly diameter I just eyeballed from photos, about 50 cm
Plug them into a flywheel calculator and pick the mid-point of the ring/disk mass distribution (it's an imperfect flywheel) and you get about 16KJ

For comparison, that's the energy equivalent of two silverback gorillas riding a tandem at 20 mph. Probably enough to make the plane wobble when it spins up.

This is very cool! But how does precession come into it?

 

[Asp Explorer]

My rep button appears to be broken - so many +1 lulzbuckets for everyone!

Oh - about the lulzmop - is it balanced for PvP?

 

[DLewth]

This is very cool! But how does precession come into it?

Sorry, had to remind myself how this came up...
It's not precession that's the problem - it's not firing for long enough (or enough of the total mass) for that to be noticeable - it's conservation of momentum. Because the plane is putting two primatological lyrca fiends-worth of energy into spinning the barrel, there's the reverse monkey business making the plane spin the other way, and it happens in something like 1/10th of a second: I can imagine it's quite a kick. The pilot needs to able to counter this to be able aim and manoeuvre properly, and being able to spin up the barrel beforehand will help a lot.

 

[Stigbob]

I don't understand bicycling primate development. Which one of them aims the gun, and if they shoot it backwards do they need to pedal ?.

 

[Toumal]

So after playing Titanfall 2 today, who wants to bet we'll see some kind of time travel mechanic and mechs in SC demo videos soon?

 

[Osmanthus]

Sorry, had to remind myself how this came up...
It's not precession that's the problem - it's not firing for long enough (or enough of the total mass) for that to be noticeable - it's conservation of momentum. Because the plane is putting two primatological lyrca fiends-worth of energy into spinning the barrel, there's the reverse monkey business making the plane spin the other way, and it happens in something like 1/10th of a second: I can imagine it's quite a kick. The pilot needs to able to counter this to be able aim and manoeuvre properly, and being able to spin up the barrel beforehand will help a lot.

Right, that's what I thought. Thanks for doing the maths

 

[Gregstrom]

That's… not the immediate image for comparison I would have thought of.

Yet, in the context of the SC development process, it is somehow irresistible.

Something extraordinarily impractical even in concept, straining under its own weight, incompetently and erratically steered towards a destination neither the driver nor the passenger comprehend, amd getting there far far slower than almost any other vehicle that could have been chosen.

 

[Dooguk]

I don't understand bicycling primate development. Which one of them aims the gun, and if they shoot it backwards do they need to pedal ?.

The primate bicycle, or pricycle, is the next step up the evolutionary ladder for all poo flingers.

 

[Tippis]

My rep button appears to be broken - so many +1 lulzbuckets for everyone!

Oh - about the lulzmop - is it balanced for PvP?

Yes. About ⅓ up the handle counting from the actual soak:y mop:y bit.

 

[Neo-ST]

So after playing Titanfall 2 today, who wants to bet we'll see some kind of time travel mechanic and mechs in SC demo videos soon?

And personal portable shields... oh gosh. You're right. He's definitely gonna copy something from Tit2.
Btw. just finished SP yesterday, I must say I was blown away by it. Didn't expect it to be so diverse and good. Felt like a blend of Half-life 2 and Portal, so much so that I was flash-backed to past with some parts of the game (Bio labs, factory, etc.) - highly recommended. MP on the other hand...meh.

 

[Stigbob]

The primate bicycle, or pricycle, is the next step up the evolutionary ladder for all poo flingers.

Of course it's so obvious, Andy Serkis anthropomorphic ape expert should be able to explain it to the Crobbler next time he's at the imaginarium doing re-shoots. The only question that remains is will the pricycle come with LTI.

 

[DLewth]

I don't understand bicycling primate development. Which one of them aims the gun, and if they shoot it backwards do they need to pedal ?.

In theory, if they shoot it backwards, then no - they'd accelerate at 71 m/s² and get a speeding ticket half a second later. An automated one, because no policeman is going to arrest a pair of cycling gorillas armed with a GAU-8 (the handcuffs aren't big enough).

In practise, of course, they're both silverbacks so they'd just spend all day arguing over who was going to steer.