What a tracer should look like (before spazzing just look).

[Upthair]

Originally Posted by Sternjaeger II

The vibration you're talking about is absolutely out of scale and wrong.

When you shoot with a machine gun it doesn't rumble or vibrate, it just had one major force vector (which we can call "recoil") that pushes in the opposite direction of the bullet direction. So, Imagining the CoG of the plane as your pivot, the plane would rotate backward on its yaw axis because of recoil, only to be compensated by the other machineguns on the opposite wing and the plane movement vector. As a consequence you can get a flicker on the yaw axis, which varies in its amplitude and frequency according to the guns you're shooting with. The recoils though won't be enough in terms of vector strength or frequency to cause vision blur or flickering like you see in guncameras, but I can tell you that there are other vibrations that can.

The 'shaking ruler' is only for those who are complete strangers to physics . If you talked with scientific rigour, your time would be totally wasted. So I chose that pic as a tentative analogy, and used words like 'roughly' and 'in a sense'.

I think what you said was mostly, but not completely, right, since you were talking about an ideal situation. The strictly backward recoil can of course generate vibrations in directions perpendicular to the recoil. Example: When you fire a pistol at a point on the horizon, your hand experiences upward movement too, which is perpendicular to the recoil.

I was in a Cessna Caravan which had a prop governor failure, with one of the props going straight into feathering: the vibration and frequency were so intense that the whole world went blurry and your could hear your skull bones rattle! Not a nice experience! It was a second, just the time to switch the engine off, but man the engine could have easily come off its mount!!

I guess a fighter pilot won't shoot when the whole world goes so blurry that he can't see clearly his target. But yes, as you said, there are other vibrations.

~

[Sternjaeger II]

Originally Posted by Upthair

The 'shaking ruler' is only for those who are complete strangers to physics . If you talked with scientific rigour, your time would be totally wasted. So I chose that pic as a tentative analogy, and used words like 'roughly' and 'in a sense'.

The fashinating thing about physics is that it has no mercy: either you know it well or it will bite you in the aXX..

You don't need scientific rigour,but examples that need to pertinent to the topic discussed,a lot of stuff looks similar in phisics,but it's not quite the same.

I think what you said was mostly, but not completely, right, since you were talking about an ideal situation. The strictly backward recoil can of course generate vibrations in directions perpendicular to the recoil. Example: When you fire a pistol at a point on the horizon, your hand experiences upward movement too, which is perpendicular to the recoil.

and here's my point proven. The strictly backwards recoil generates force vectors,not "vibrations" that are conditioned by pivot points,and yr example is the perfect evidence:when shooting a pistol your wrist becomes the pivot point,hence the rotation upwards,which is amplified on semiautomatic pistols because of the slider movement. Interestingly enough,if you held the pistol "gangsta style",with the grip and barrel horizontally positioned,the recoil will push the pistol inwards towards yr aiming axis.. The crazy stuff u can do at a shooting range