I actually managed to create a viable one at 5/8 using an XL engine. 6/9 was out of the question though to keep the warload and the rest intact.
BATTLETECH
Medium BattleMech Technical Readout
Type: Hellhound
Technology Base: Clan / 3067
Ruleset: Standard (5th edition)
Tonnage: 50
Cost: 9,164,000 C-bills
Battle Value: 1,428
Equipment Mass
Internal Structure: Endo Steel 2.5
Engine: 250 6.5
Type: Fusion XL
Walking MP: 5
Running MP: 8
Jumping MP: 0
Heat Sinks: 13 [26] 3.0
Gyro: Standard 3.0
Cockpit: 3.0
Armor Factor: 153 8.0
Internal
Structure Armor
Value
Head 3 9
Center Torso 16 21
Center Torso (rear) 7
L/R Torso 12/12 16/16
L/R Torso (rear) 6/6
L/R Arms 8/8 14/14
L/R Legs 12/12 22/22
Weapons and Ammo Location Crits Tons
ER Laser (Large) LA 1 4.0
ER Laser (Large) RT 1 4.0
LB 10-X AC RA 5 10.0
Streak SRM 6 LT 2 3.0
Ammo (LB 10-X) 10 RT 1 1.0
Ammo (LB 10-X) 10 RT 1 1.0
Ammo (SSRM 6) 15 LT 1 1.0
BattleForce 2
MP Damage PB/M/L Overheat Class
5 4/4/3 4 M
Armor/Structure Point Value Specials
4/3 15 -
Hellhound
Mass: 50 tons
Chassis: Endo Steel
Power Plant: Magna 250 Fusion XL
Cruising Speed: 54 kph
Maximum Speed: 85 kph
Advanced Motive: none
Jump Jets: none
Jump Capacity: none
Armor: Ferro-Fiberous
Cockpit: Standard
Armament:
ER Laser (Large)
ER Laser (Large)
LB 10-X AC
Streak SRM 6
Manufacturer: Clan
Communications System: Standard
Targeting & Tracking System: Standard
Overview
The Hellhound was an unexpected addition to the Jade Falcon Touman, a product of bad supply lines and desperate improvisation that led to a surprisingly capable medium battlemech.
Built on a Black Lanner chassis to start, the Hellhound was a result of a number Black Lanners going down due to engine hits during action against the ARDC and lacking the necessary 385-rated XL engines to bring them back up to speed.
Rather than let them loiter, Galaxy Commander James Malthus ordered his astechs to install a 250-rated XL engine instead and retrofit the weapon load to a fixed configuration.
Capabilities
Lowering the speed to a relatively slow (per Clan standards) 86 kph at a run, the Hellhound keeps the eight tons of Ferro Fibrous Armor as the Black Lanner but gains an impressive amount of podspace to work with. Two Series XII ER Large Lasers provide the long-range bunch for the mech out to extreme ranges, while in close a LB 10-X and a Streak SRM-6 rack allow for a warrior to exploit holes created in the enemy's armor. 13 heat sinks allow the Hellhound to stay perfectly equal firing both lasers on a run or fire one laser and the rest of the weapons without pause in-close.
Deployment
The Hellhound has seen action mainly with Garrison and Second Line clusters in the Occupation Zone and on raids in the ARDC so far, though some have been taken as isorla by Inner Sphere units and have spread as far as Solaris VII and the Federated Suns, with two being spotted on Talon/Wernke during pitched battles over Kallon Industries' mech factory.