Gerry's Magical Portable Dyno

Lazzara Yachts has used the services of JEI (Janelle Engineering, Inc.) during sea trials of the last five 80s, as well as for the sea trials of other vessels it currently builds. JEI's PowerMate system records and graphs torque, thrust, horsepower, rpm, trim and heel angles, speed, voltage, amperage, engine temperatures, and GPS positioning without restricting engine horsepower. During a sea trial a JEI engineer secures wireless strain gauges to the prop shaft(s), the gauges communicate with a laptop nearby, and that laptop communicates with another laptop on the bridge, where the engineer conducts actual testing.

According to Lazzara, accurate shaft horsepower measurements taken from JEI's portable dyno--as opposed to theoretical fuel, horsepower, and other numbers supplied by engine manufacturers--are invaluable for specifying props and diagnosing performance problems like the one we encountered during our PMY sea trial.    --B.P.

Specs

Base price: $4.45 million with 2/1,300-hp MTU 12V183TE94 diesel inboards
Optional power: none
Standard equipment: Maxwell windlass; 20-hp Imtra bow thruster; Gyro-Gale pneumatic stabilizers; 6 Microphor compressed-air MSDs; 3-hp Flomax bilge pumps; 4 Rule 2000 bilge auxillary pumps; 1,200-gpd Sea Recovery watermaker; 120,000-Btu CruisAir A/C; 6 8D batteries; 6 Group 27 batteries; Fireboy fire-extinguishing system; Nautical Structures davit; Kohler double-bin stainless-steel sink; Frigidaire dishwasher; Kitchenaid trash compactor, refrigerator, and range; GE microwave oven; U-Line wine cooler; 2 Sub-Zero drawer-type freezers; Gorman 40-gal. waterheater; 2 Delta-T frequency-controlled axial engine-room fans; 2 Seadoo RX PWC; 15' Novurania w/40-hp Yamaha outboard

SPECIFICATIONS
LOA: 80'7"
Beam: 20'1"
Draft: 4'6"
Weight: 115,000 lbs.
Fuel capacity: 2,000 gal.
Water capacity: 400 gal.
Test engines: 2/1,300-hp MTU 12V183TE94 diesel inboards
Transmissions/ratio: ZF 2000 A/2.467:1
Props: 39 X 46.7 5-blade Nibral Rolla
Steering: Hynautic w/engine-driven power assist
Controls: MTU Electronik
Optional equipment on test boat: none

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