Aspen builds power PROA catamarans that combine rugged construction, finely finished interiors and pleasant accommodations with a unique ultra-efficient smooth riding hull form.
After selling Glacier Bay, which he previously founded, Larry Graf designed and patented a unique PROA cat hull and launched Aspen Power Catamarans.
Each hull has a similar exterior shape and length, but one is 35% thinner, meaning there’s less resistance and it requires less power. Models like the C90 and C100 use a single inboard diesel. The larger hull houses the engine, a keel, prop and rudder while the other is unencumbered. Propulsion on one side doesn’t make the boat turn, as hydrodynamics ensure straight tracking. The narrow entry of the hulls slices easily through the water, providing smooth, even acceleration and top speeds nearing 25 mph, even though they don’t plane. Fuel efficiency and stability are added benefits, giving Aspens good range and sea-keeping abilities. To prove it, Larry and his son, Nick, took an Aspen C90 664 miles around Vancouver Island, unrefueled. They averaged 13.6 mph, burned 267 gallons of diesel (with expedition tanks) and completed the journey in 47 hours.