Construction design is a tough class
For around 43 years, Terhi, a branch of the globally operating "Otto Brandt Group", which also includes Silver and Sea Star boats, has been involved in the research and development of extremely resistant boats that have nothing to do with conventional GRP bowls, although at first glance they hardly differ from them on the outside. “ABS” plastic is the magic word, but more on that later.
Concept, Exhibattending, processing
The success rate of these Finnish products is truly impressive. Because hard to believe - and actually designed as a rowing boat - but motorizable up to 4.4 kW (6 HP), the type "385" alone has been sold 40,000 times (in words forty thousand) over the years. Before the test exhibit presented here has screwed its way up to these production dimensions, many deep-drawing molds will have to be warmed up, but this relatively young Terhi offspring is well on the way to conquering the title “Primus” in its class.
After all, it is not just the reputation of near resilience that precedes Terhi boats. Every day, these robust fins prove their application possibilities in the face of the most divergent conditions in practice. No matter whether as a private just-for-fun-pleasure boat, government vehicle, work or fishing boat, as well as in tough, material-killing charter use.
A not insignificant quality feature here, the absolute unsinkability and thus a safety factor that can hardly be surpassed. The space between the lower and inner shell of the fuselage up to the coaming is filled with closed-cell, water-repellent polyurethane foam under tons of pressure. As a result, if the hull of the boat were cut apart in the middle, both parts would continue to float. Impressively delivered evidence from a crew of two confirmed this thesis. With a power chainsaw directly on the water, they dared to make this bold cut and, after the end of the action, rowed separately to the bank.
Anyone who uses the "free encyclopedia Wikipedia" can read the following facts about "ABS" plastics: A.crylonitrileB.utadienS.tyrene copolymer is a synthetic terpolymer made from the three different types of monomers acrylonitrile, 1,3-butadiene and styrene. An apostrophication with which one will certainly break open doors with chemists, but throw a big question mark at the feet of the layman. In plain language, an almost indestructible sheet plastic, freely deformable under high temperatures up to the molten state. Easily repaired if damaged, such as by welding. Conditions that are more than ideal for the production of boat hulls like a Terhi.
And this test part can also be “celebrated” briefly and succinctly. No corners, no edges, everything round and smooth, no razor-sharp, frayed GfK cutting or milling points and thus a closed surface structure, for which the dreaded osmosis is a foreign word, among other things.
The foredeck concept with the three lockable locker lockers, which also serve as seats, is cleverly ingenious, especially comfortable if the right upholstery has been ordered. The windshield of the steering position console with its stable handrail fully lives up to its name. The rev counter is clearly visible, as is the trim indicator, glass holder, 12 V socket, bilge pump and navigation light toggle switch. The plastic-coated, five-spoke rudder and the single-lever control are ergonomically coordinated and driver-friendly. Plenty of space in the aft transverse bench, which can also be locked, next to the battery and mobile outboard tank. Side handrails, a bow railing open to the front, the tidy engine pan, bathing ladder, four mooring fittings, self-draining device, a stable rubbing strip and the non-slip flooring complete the test exhibit.
Empty weight 240 kg, permitted payload 525 kg. Here - in contrast to many other, far more spectacular, floatable objects - the situation is somewhat turned upside down. Example: A steel yacht weighing tons with a CE-approved bunker mass of around two thousand kilos is already a highlight. This “water flea”, on the other hand, is given such immense buoyancy due to its foamed overall construction that it is almost certainly a few kilos more Ballast.
Terhi allows a motorization upper limit of 22 kW (30 PS). A power brand that, if the "445" is used permanently alone or in pairs, is absolutely sufficient. Even the small family with a picnic basket and bathing accessories can cope with it very well, as can be seen from our driving values under full load at 5,900 rpm with almost 40 km / h (21.5 kn). If the underwater part of the 30cc Honda is trimmed close to the mirror, it takes about six seconds, then gliding is the order of the day. 4,200 rpm, 16.1 km / h (8.7 kn). From this speed level onwards, the helmsman should make friends with the rocker switch for power trim in the gearshift lever. A question of experience, feeling and load distribution to find the optimal angle of attack. In the test subject approx. 60% above the zero position. Then put another nine seconds on it, we're planning with VMax over the lake.
But here it comes: Now a firm hold is the order of the day - for the crew on board - because after only 2½ turns of the rudder from side to side, it is hard on. And that happens damn fast, so that even at "only" 40 km / h unexpectedly considerable centrifugal forces develop. On track, without smearing or getting stuck at the rear, with a moderate heel angle, the Terhi rushes into an arc of about three boat lengths without showing the slightest sign of cavitation. Whether over starboard or port, the course change smoothly by reversing with the precisely built Teleflex steering on the 30 Honda, which also runs linearly from idle to maximum rated speed without buckling and accelerates cleanly.
In addition, the absolutely stable straight-line travel, clean, dry run through the steeply skimmed foredeck without splashing water, which also acknowledges a not calculated jump over an unexpected wave with a full reinsertion into the wet element, is also praiseworthy. Here, among other things, the indisputable advantages of the high strength of the hull through the foaming technology become clear. Annoying, hollow-sounding yogurt cup acoustics - none of them.
A final word on the subject of motorization in this chapter. As already mentioned at the beginning, a maximum of 22 kW (30 PS) is quite okay. The chronicler also puts on this shoe that this Terhi would not be overwhelmed with significantly more power on the mirror, you just have to be able to handle it. This objection based on the consideration that if the CE-compliant maximum load of 525 kg were ever fully exhausted, speed losses cannot be discussed away. Perhaps the shipyard will fight for a 33.5 percent concession on this point, so that 7.4 kW (10 PS) and thus a maximum of 40 PS would be possible.
If you are looking for a boat that can be easily trailed with any mid-range towing vehicle, is absolutely easy to care for, does not require any financial pull-ups in terms of acquisition or operating costs, but still allows pure driving pleasure, then you are undoubtedly well advised to opt for the Terhi 445 C. You can also choose the Terhi 445 C. 15 HP engine available.
|Construction / design||Terhi|
|Country of manufacture||Finland|
|Motorization test KW (PS):||22 (30)|
|Price standard / test ship:||5940,-/ 15.000,-€|
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