Actual 3 related questions about trailer construction:
1. Independant wheeled combat vehicle trailers
The suspension factor of wheeled combat vehicles (20 for all weights) raises the question what constitutes a "trailer". If you construct such a trailer with controls (to operate weapons indepently) and a very low weight (lets say 10 tons) its suspension factor of 20 would create a theoretical MP of 3 / 5 out of the minimum engine (engine rating 10+20). Of course it has a hitch, but a tractor has also a hitch.
Is that then a standard wheeled combat vehicle or a wheeled independand trailer or is the difference between both simply blurred here?
Or to bring that to a simple question: Is it possible to pull a vehicle (with hitch), that could move on it´s own, with a tractor and use it as a trailer?
2. "Push"-trailers
"Push" trailers (having a hitch in the rear and being pushed by the tractor instead of being pulled) are only mentioned in TM page 98 (Combat Vehicle Construction), and nowhere else in Total Warfare or other rule books.
So could such trailers really be constructed? For example to act as additional "armor" and carry additional weapons for the tractor - or is that some kind of exploit of the rules?
3. Independant support vehicle trailers
While indepent combat vehicle trailers have a minimum engine rating of 10 (see TM page 101), no rules are provided for creating independent operating trailers for support vehicles.
How is the engine for that calculated? A engine 10 would be to heavy for light support vehicles. Note: There are minimum weights for some engines (fusion and fission) given at some tech levels.
And on top: Do such independant support vehicle trailers need some kind of controls (or do they need to skip their "trailer chassis mod" (x0,5) if they want to operate independand of a tractor an fire weapons?