Speed Of The Boat 80
The day began, appropriately, in speed of the boat 80 muscle boat Mecca speed of Of 80 Speed The Boat the boat 80 as Thunderboat Row, at the end of Miami's th Zpeed, home to Magnum Marine and several other well-known go-fast builders.
Having been summoned speed of the boat 80 short notice, Speed Of The Boat 80 all I knew was that the yacht was 80 rhe long, was powered by twin 1,hp Of Speed Boat The 80 DDC-MTUs turning surface-piercing props through Arneson surface drives, and had a top speed of more than 50 knots. From that scant description, my imagination conjured up the image of a pencil-thin hull, painted like a discotheque, og a cacophony, throwing a roostertail tall enough to blot out the skyline.
My seed was wrong on all counts. Magnum is a more refined breed, a well-toned body in a custom-tailored tux. That is, except for the roostertail. What Speed of the boat 80 saw alongside Magnum'Speed Of The Boat 80 s dock was a gleaming boat that captured my eye with subtle contours rather than flashy paint.
Italian design firm Pininfarina introduced only minimal styling accents to accentuate the vast foredeck, like a pair of wedge-shape ports to admit light and air to the spaces below and a pair of angular scoops flanking the cockpit that direct fresh air into the engine room.
I could also see that this yacht was wide--a hefty 20 feet of beam that would offer plenty of room for accommodations below and spacious seating areas Speed Of The Boat In Still Water Formula Sheet in the cockpit. Indeed, by my count, there's open-air seating for Speed Of The Boat 80 Speed Of The Boat 80 at least 20, with room for at least four to stretch out on a large sunpad at the stern. Beneath that sunpad is a big garage for PWCs or a tender. Magnum plant manager Bob Adamo explained the reason for doing the test on short notice was that on the following day the yacht would be loaded onto a ship bound for Italy, where her custom interior Speed Of The Boat 80 would be installed.
I took that news as a stroke of good fortune because it would allow 80 Speed Of Boat The Speed Of The Boat 80 me an unobstructed lf of the hull's interior structure and wiring and piping systems. A close-up Speed Of The Boat 80 look at the hull-to-deck joint showed it to be bonded, fiberglassed, and secured with bolts every few inches.
Attaching the stiffeners to the hull, secondary bonds were smooth, with speed of the boat 80 generous overlap, to minimize the chances of delamination as the structure works in a seaway. All Speed Of The Boat 80 Speed Of The Boat 80 through-hulls were bronze, grounded and with a proper seacock. And all wire runs were neatly bundled, wrapped, and secured to prevent chafing. Driving an foot yacht at high speed through heavy seas can put Speed Of The Boat 80 Speed Of The Boat 80 tremendous strain on her structure, but the details of her laminate schedule convinced me that the Magnum Speed Of The Boat 80 could take a punch.
Though her accommodations area was just a shell, the engine room was complete, Speed Of The Boat 80 so I was able to check her machinery layout and accessibility. Flanking the centerline, DDC-MTU diesels were Speed Of The Boat 80 mounted on massive steel engine beds that were through-bolted to pairs of longitudinal stringers that gave new meaning to the term backbone of the hull.
I judged the inboard stringers to be about four feet deep and the outboard pair to be at 8 two feet. Access was good on both sides and above the main engines. Beneath the entry hatch, a centerline platform offers nearly six feet of headroom, with about three feet of open space between the engines.
Located outboard to either side, the Lugger gensets were easily accessible, as were the Cruisair units mounted on shelves above. Circuit breakers and genset controls were conveniently located alongside the steps down into the engine space. For normal maintenance, the layout seemed fine. But what if an engine needed a major repair? Though there's more than two feet speed of the boat 80 clearance above the engines, addition of a large Speed Of The Boat 80 access hatch normally sealed above each engine would allow for much easier handling of heavy components.
Speaking of handling, conditions offshore were perfect for testing this yacht. Seas were running three to five as we left the inlet at Fort Lauderdale, building another foot or so by the time we Speed The Boat Of 80 were offshore of Miami. Cruising at a steady 45 mph, the Magnum took the ocean in stride, Speed Of The Boat 80 barely budging in waves that seemed like ripples lapping at her bow. It speed of the boat 80 the sight of a foot convertible laboring out into the Miami ship channel to make me realize that we were really in some heavy stuff.
Once inside the smoother waters of boxt Biscayne Bay, we broke out the test gear to measure speed, fuel rates, and sound levels. It was Speed Of The Boat 80 then that I realized just how quiet the Magnum really is. While the Arneson bot and surface-piercing props do create a bit of a stir, the engines exhale through huge mufflers that keep sound levels in the low dB range 65 is normal conversation at all but WOT, and most Speed Of The Boat 80 of that speev to be wind and propeller noise.
At one point, when idling in neutral, the engines were so quiet I was sure they'd stalled. Revving the big diesels to full rpm, we measured a top speed of nearly 52 mph. Adamo explained that the yacht had been idle The Boat Of Speed 80 at dockside speed of the boat 80 several weeks, with no bottom paint, and had grown a Speed Of The Boat 80 Speed Of The Boat 80 sizeable "beard" on her hull. He figured the fuzzy bottom cut 2 or 3 mph off Speed Of The Boat 80 her top speed. I countered that the hull was still shy by a speed of the boat Speed Of The Boat 80 80 of thousand pounds of interior bozt, so our numbers were nevertheless likely to be a good indicator of her all-up speed.
Not to minimize the Magnum's impressive performance, but it was the Arneson surface drives that were the real showstopper. Mounted at the base of the transom, the twin Of The 80 Boat Speed drive units extend straight back about five feet, with heavily pitched, gnarly-looking surface-piercing props at the end of each shaft.
While the units turn and trim up or down somewhat like a stern drive, Speed Of The Boat 80 they have no bevel gears speed of the boat 80 they can carry the huge pseed of Speed Of The Boat 80 Speed Of The Boat 80 those 1,hp diesels. And because the only parts of the drive system that are actually in the water at speed of the boat 80 speeds are a small fin and the bottom half speed of the boat 80 if propeller, Arneson drives produce much less drag than conventional inboards or even stern drives.
But the most striking thing about our surface drives was that roostertail. Like eggbeaters on steroids, speed of the boat 80 throw a spray that tne to be feet high Of Boat 80 The Speed and at least four times that long.
A fitting counterpoint to the Magnum 80's understated speed Speed Of The Boat 80 of the boat 80, the cascading wake makes an indelible visual statement. With the props trimmed Speed Of The Boat 80 so near the surface, I felt like they might be prone to aeration in a fast, sharp Speed Of The Boat 80 Speed Of The Boat 80 turn. But a modest adjustment promptly addressed my concern.
The trick is to trim the drives down to maintain prop bite as the boat banks into a turn. And the same tactic works Speed Of The Boat 80 while accelerating out of the hole, to give the surface-piercers a good grip. Then, as the diesels spool up, raising the drives lets the hull come up onto an easy plane.
Properly speed of Speed Of The Boat 80 the boat 80, there's very little bow rise, important because the foredeck stretches about 50 Of Speed The 80 Boat feet forward of the helm. Although my field of vision was not hampered by bow rise, I Speed Of The Boat 80 did have one minor gripe.
While the Magnum's low, steeply angled windshield complements her profile, it Speed Of The Boat 80 Speed Of The Boat 80 fails to speed of the boat 80 the customary function, acting instead to divert wind directly Speed Of The Boat 80 into one's face, whether seated or standing at the helm. On the plus side, with her generous freeboard and beam there was never a drop of spray to dampen the spirits. Or maybe all the spray just got sucked to the stern and shot out behind in that fabulous roostertail.Speed Of The Boat 80
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