After tons of savings in my Type-7, I was hesitant to buy the Type-9 due to the total lack of maneuverability and bad armament. However, now that I have fully upgraded my T7, I am here to inform all players that this is a non-issue 95% of the time. Unlike in smaller freighters, you don't even need to be pointing at the escape vector of an interdiction to gain ground and escape (which is good, because that's nearly impossible most of the time). With most interdictions (NPC, mind you, I wouldn't fly this ship in open play...), the outer circle being blue is enough to get away. Of course, you'll be making loads of credits, so once you get enough money, fully arm your ship. I've had little trouble fighting off ships up to vulture-size without an escort. As a disclaimer, Anacondas trying to interdict you will most likely succeed, so just boost away after submitting and you should be fine (you can boost at max interval with 6A Power distributors). My loadout for loop-routes is below.
[Type-9 Heavy]
M: 2E/T Beam Laser
M: 2E/T Beam Laser
M: 2F/T Multi-cannon
S: 1G/G Pulse Laser
S: 1G/G Multi-cannon
U: 0A Shield Booster
U: 0A Shield Booster
U: 0A Shield Booster
U: 0A Shield Booster
BH: 1I Lightweight Alloy
RB: 6A Power Plant
TM: 6A Thrusters
FH: 6A Frame Shift Drive
EC: 5D Life Support
PC: 6A Power Distributor
SS: 4D Sensors
FS: 6C Fuel Tank (Capacity: 64)
8: 8E Cargo Rack (Capacity: 256)
7: 7E Cargo Rack (Capacity: 128)
6: 6E Cargo Rack (Capacity: 64)
5: 5A Shield Generator
4: 4E Cargo Rack (Capacity: 16)
4: 4E Cargo Rack (Capacity: 16)
3: 3A Fuel Scoop
3: 3E Cargo Rack (Capacity: 8)
2: 2E Cargo Rack (Capacity: 4)
---
Shield: 307.02 MJ
Power : 19.60 MW retracted (78%)
22.92 MW deployed (91%)
25.20 MW available
Cargo : 492 T
Fuel : 64 T
Mass : 1,202.0 T empty
1,758.0 T full
Range : 17.34 LY unladen
12.48 LY laden
Price : 143,816,546 CR
Re-Buy: 7,190,827 CR @ 95% insurance
[Type-9 Heavy]
M: 2E/T Beam Laser
M: 2E/T Beam Laser
M: 2F/T Multi-cannon
S: 1G/G Pulse Laser
S: 1G/G Multi-cannon
U: 0A Shield Booster
U: 0A Shield Booster
U: 0A Shield Booster
U: 0A Shield Booster
BH: 1I Lightweight Alloy
RB: 6A Power Plant
TM: 6A Thrusters
FH: 6A Frame Shift Drive
EC: 5D Life Support
PC: 6A Power Distributor
SS: 4D Sensors
FS: 6C Fuel Tank (Capacity: 64)
8: 8E Cargo Rack (Capacity: 256)
7: 7E Cargo Rack (Capacity: 128)
6: 6E Cargo Rack (Capacity: 64)
5: 5A Shield Generator
4: 4E Cargo Rack (Capacity: 16)
4: 4E Cargo Rack (Capacity: 16)
3: 3A Fuel Scoop
3: 3E Cargo Rack (Capacity: 8)
2: 2E Cargo Rack (Capacity: 4)
---
Shield: 307.02 MJ
Power : 19.60 MW retracted (78%)
22.92 MW deployed (91%)
25.20 MW available
Cargo : 492 T
Fuel : 64 T
Mass : 1,202.0 T empty
1,758.0 T full
Range : 17.34 LY unladen
12.48 LY laden
Price : 143,816,546 CR
Re-Buy: 7,190,827 CR @ 95% insurance