Here's my first attempt at designing a vehicle, its probably been done before, but here it goes anyway:
The Death Trap is a 5 ton hovercraft that has a top speed of just over 280 km/h (ie moves 17/26), and is equipped with an Inner Sphere Medium Laser and a Clan Improved Heavy Medium Laser, giving it a pretty good 3 to 1 damage to weight ratio. It has only minimal physical armor, but if you also consider speed as armor, then you could say it has more than enough "armor" to survive.
BattleTech Vehicle Technical Readout
VALIDATED
Type/Model: Death Trap
Tech: Mixed / 3137
Config: Hover Vehicle
Rules: Level 2, Custom design
Mass: 5 tons
Power Plant: 45 XL (IS)
Cruise Speed: 183.6 km/h
Maximum Speed: 280.8 km/h
Armor Type: Standard
Armament:
1 Clan Improved Heavy Medium Laser
1 Medium Laser
Manufacturer: Cosby BattleMech Research Firm
Location: Vega
Communications System: CB Radio
Targeting & Tracking System: Visual Line of Sight
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Type/Model: Death Trap
Mass: 5 tons
Equipment: Items Mass
Int. Struct.: 4 pts Standard 0 0.50
Engine: 45 XL (IS) 2 0.50
Shielding & Transmission Equipment: 0 0.50
Cruise MP: 17
Flank MP: 26
Heat Sinks: 10 Single 0 .00
Cockpit & Controls: 0 0.50
Lift Equipment: 0 0.50
Crew: 1 Member 0 .00
Turret Equipment: 0 0.00
Armor Factor: 8 pts Standard 0 0.50
Internal Armor
Structure Value
Front: 1 2
Left / Right Sides: 1 2/2
Rear: 1 2
Weapons and Equipment Loc Heat Ammo Items Mass
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1 iHeavy Medium Laser(C) Front 7 2 1.00
1 Medium Laser (IS) Front 3 1 1.00
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TOTALS: 10 5 5.00
Items & Tons Left: 1 .00