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Лека идея на англиски какво е това Клас мотор от една марка и един модел.
http://marine.cat.com/cda/layout?m=319696&x=7&id=914324
MARINE ENGINE RATINGS GUIDELINES
Ratings should be applied on the basis of vessel operation, and on the type boat or hull design. Vessel descriptions such as workboat, pilot boat, or ferry boat; and hull design such as displacement or planing hull do not define the operating conditions of the vessel or the power demands on the marine engine. More than one rating could apply to these descriptions, depending on how the vessel is operated. Listed below are descriptions of ratings A, B, C, D and E followed by an overview chart.
Unrestricted Continuous - A Ratings
For vessels operating at rated load and rated speed up to 100% of the time without interruption or load cycling (80% to 100% load factor).
Typical applications could include but are not limited to vessels such as freighters, tugboats, bottom drag trawlers, or deep river tugboats. Typical operation ranges from 5000 to 8000 hours per year.
For 3600 Marine Engines only:
Heavy Duty Marine Engine - B Ratings
For vessels operating at rated load and rated speed up to 80% of the time with some load cycling (40% to 80% load factor).
Typical applications could include but are not limited to vessels such as mid-water trawlers, purse seiner, crew and supply boats, ferries, or towboats. Typical operation ranges from 3000 to 5000 hours per year.
Maximum Continuous - C Ratings
For vessels operating at rated load and rated speed up to 50% of the time with cyclical load and speed (20% to 80% load factor).
Typical applications could include but are not limited to vessels such as ferries, harbor tugs, fishing boats, offshore service boats, displacement hull yachts, or short trip costal freighters. Typical operation ranges from 2000 to 4000 hours per year.>
Intermittent Duty - D Ratings
For vessels operating at rated load and rated speed up to 16% of the time (up to 50% load factor).
Typical applications could include but are not limited to vessels such as offshore patrol boats, customs boats, police boats, some fishing, fireboats, or harbor tugs. Typical operation ranges from 1000 to 3000 hours per year.
High Performance - E Ratings
For vessels operating at rated load and rated speed up to 8% of the time (up to 30% load factor).
Typical applications could include but are not limited to vessels such as pleasure craft, harbor patrol boats, harbor master boats, some fishing or patrol boats. Typical operation ranges from 250 to 1000 hours per year.
И пример за това колко коня е един и сьщ модел мотор в различен клас,Катерпилар Ц32 - А клас 660 коня,Д клас 1600 коня,по-малките мотори имат и Е клас ма не на Мерцедес,а на дизелов мотор,с пьти по-слаб тормоз от А клас дьржи,много пьти по-слаб.
A-Ratings (available Keel Cooled or Heat Exchanger Cooled):
492 bkW (660 bhp) @ 1800 rpm (WOSR)560 bkW (750 bhp) @ 1800 rpm (WOSR)634 bkW (850 bhp) @ 1800 rpm (WOSR)709 bkW (950 bhp) @ 1600 rpm
746 bkW (1000 bhp) @ 1800 rpm (WOSR)
B-Ratings
(available Keel Cooled or Heat Exchanger Cooled):
970 bkW (1300 bhp) @ 2100 rpm
C-Ratings
(available Keel Cooled or Heat Exchanger Cooled):
970 bkW (1300 bhp) @ 1800 rpm
1082 bkW (1450 bhp) @ 2300 rpm (WOSR)
D-Rating
(available Heat Exchanger Cooled only):
1194 bkW (1600 bhp) @ 2300 rpm (WOSR)
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currentVote
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http://marine.cat.com/cda/layout?m=319696&x=7&id=914324
MARINE ENGINE RATINGS GUIDELINES
Ratings should be applied on the basis of vessel operation, and on the type boat or hull design. Vessel descriptions such as workboat, pilot boat, or ferry boat; and hull design such as displacement or planing hull do not define the operating conditions of the vessel or the power demands on the marine engine. More than one rating could apply to these descriptions, depending on how the vessel is operated. Listed below are descriptions of ratings A, B, C, D and E followed by an overview chart.
Unrestricted Continuous - A Ratings
For vessels operating at rated load and rated speed up to 100% of the time without interruption or load cycling (80% to 100% load factor).
Typical applications could include but are not limited to vessels such as freighters, tugboats, bottom drag trawlers, or deep river tugboats. Typical operation ranges from 5000 to 8000 hours per year.
For 3600 Marine Engines only:
- Continuous Service (CS) Rating is suitable for continuous duty applications, including dredges, for operation without interruption or load cycling.
- Maximum Continuous (MC) Rating is generally used for vessel applications involving varying loads. The engine power actually produced is limited by application guidelines, leaving a power reserve for unusual operating conditions. Operating time at loads above the Continuous Service rating for a given RPM is limited to 1 hour in 12 or 8.3% of total operating hours.
Heavy Duty Marine Engine - B Ratings
For vessels operating at rated load and rated speed up to 80% of the time with some load cycling (40% to 80% load factor).
Typical applications could include but are not limited to vessels such as mid-water trawlers, purse seiner, crew and supply boats, ferries, or towboats. Typical operation ranges from 3000 to 5000 hours per year.
- Some 3500 engines have "Bhp ratings" which are typically used in fast commercial and passenger vessels including catamarans and SWATH vessels with high load factors.
- 3600 marine engines indicating "Fast Commercial Vessel Ratings (FCVR)" are typically used in high speed commercial vessel applications with approximate load profile: 85% of operating hours at rated power, 15% of hours at less than 50% rated power.
Maximum Continuous - C Ratings
For vessels operating at rated load and rated speed up to 50% of the time with cyclical load and speed (20% to 80% load factor).
Typical applications could include but are not limited to vessels such as ferries, harbor tugs, fishing boats, offshore service boats, displacement hull yachts, or short trip costal freighters. Typical operation ranges from 2000 to 4000 hours per year.>
- Some 3500 engines have "Chp ratings" which are used in fast commercial and passenger vessels and cruising yachts with moderate load factors.
Intermittent Duty - D Ratings
For vessels operating at rated load and rated speed up to 16% of the time (up to 50% load factor).
Typical applications could include but are not limited to vessels such as offshore patrol boats, customs boats, police boats, some fishing, fireboats, or harbor tugs. Typical operation ranges from 1000 to 3000 hours per year.
- Some 3500 marine engines have "Dhp ratings" which are used in patrol craft, fast passenger vessels, and cruising yachts with low load factors.
- 3600 marine engines indicating a "Military Fast Vessel Rating (MFVR)" are typically used in patrol craft and other naval vessels with low load factors.
High Performance - E Ratings
For vessels operating at rated load and rated speed up to 8% of the time (up to 30% load factor).
Typical applications could include but are not limited to vessels such as pleasure craft, harbor patrol boats, harbor master boats, some fishing or patrol boats. Typical operation ranges from 250 to 1000 hours per year.
- Some 3500 marine engines have "Ehp ratings" which are typically used in fast patrol craft and fast yachts with low load factors.
И пример за това колко коня е един и сьщ модел мотор в различен клас,Катерпилар Ц32 - А клас 660 коня,Д клас 1600 коня,по-малките мотори имат и Е клас ма не на Мерцедес,а на дизелов мотор,с пьти по-слаб тормоз от А клас дьржи,много пьти по-слаб.
A-Ratings (available Keel Cooled or Heat Exchanger Cooled):
492 bkW (660 bhp) @ 1800 rpm (WOSR)560 bkW (750 bhp) @ 1800 rpm (WOSR)634 bkW (850 bhp) @ 1800 rpm (WOSR)709 bkW (950 bhp) @ 1600 rpm
746 bkW (1000 bhp) @ 1800 rpm (WOSR)
B-Ratings
(available Keel Cooled or Heat Exchanger Cooled):
970 bkW (1300 bhp) @ 2100 rpm
C-Ratings
(available Keel Cooled or Heat Exchanger Cooled):
970 bkW (1300 bhp) @ 1800 rpm
1082 bkW (1450 bhp) @ 2300 rpm (WOSR)
D-Rating
(available Heat Exchanger Cooled only):
1194 bkW (1600 bhp) @ 2300 rpm (WOSR)
WebRep
currentVote
noRating
noWeight
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