Why do almost all StarFleet ships have a Aft Ventral-Side Concave cavity on the StarDrive?

[Bry_Sinclair]

It's to stabilise the warp particle quantum resonance field, without that design feature there would be a catastrophic build up of negatively charged tachyons that would affect the phase polarity of the antimatter containment pods, that or it just keeps the secondary hull from looking too blocky.

 

[Kamen Rider Blade]

It's to stabilise the warp particle quantum resonance field, without that design feature there would be a catastrophic build up of negatively charged tachyons that would affect the phase polarity of the antimatter containment pods, that or it just keeps the secondary hull from looking too blocky.

Yet you look at all the other Alien species with "Warp Drive" and they don't have the same cut-out.

So I'm more inclinded to believe your secondary reason.

 

[mos6507]

Original RL reason:

In-universe reason: Whatever floats your boat, in a manner of speaking.

I've never made that conscious association before, but now that I see it....

 

[137th Gebirg]

They have to put the observation area of the bowling alley somewhere...