How big is a cargo unit anyway?

This is something that needs to be addressed.  I'd like to see us define a cargo unit to be a specific size and then ships are designed to carry a certain number of them (and it would be more than 1 per HS).<br /><br />The problem I see with the current system (and this doesn't just apply to the cargo units) is that the size (i.e. volume) of a ship goes up geometrically with HS while its capacity in terms of weapons, cargo, etc only goes up linearly.  Now I don't expect it to scale exactly the same as larger ships need more infrastructure but the current system doesn't make sense.<br /><br />for example, the Gullwind is a HS 6 freighter and as such can carry 6 cargo units according to the standard rules.  However, if I build a HS 10 freighter, it has the same number of engines, only requires 4 more crew and according to the standard rules can carry 10 cargo units.  However, based on the standard sizes of the different ships in the Campaign book.  This ship is physically over 7 times larger than the Gullwind.  It should be able to carry about 7 times (700%) more cargo, not just 66% more.  And my HS 20 super freighter (which could put 3-5 gullwinds inside it's cargo bays) is ove 115 times its size and should be that much more cargo as well.<br /><br />Let's use this tread to thrash out what a cargo unit should be.  We can work out the details of how that is dealt with in the construction rules elsewere.  As an different side project we could also work out how many cargo units various pieces of cargo take up (say a Class A atomic engine require 4 cargo units to transport).<br /><br />My vote is to define it as something like a 5m x 5m x 6m (150 m³ ) volume.  It doesn't have to be exactly that shape but that is the basic size.  That means you might be able to shoehorn two cargo units into a HS 2 shuttle (you'd probably get only one) but there would be no HS 1 cargo shuttles.  (A HS 1 ship is only  ~31 m³ in total size.  In theory, if designed properly you could probably package a HS 1 ship into a single cargo unit.)<br /><br />What are your thoughts?<br />