10-1_Engine Numbering & Identification

© Wärtsilä Land & Sea Academy 1 Chapter 10-1 6-Jul-07

RT-flex Control Elements

RTA Hands-onEngine Training

Engine Numbering and Designation

Engine Identification

Chapter 10-1


RT-flex Control Elements RTA 2-Stroke






RT-flex Control Elements RT-flex 2-Stroke


RT-flex Control Elements Engine Identification

Rules for Identification of Engine Versions

• The need to identify and allocate design drawings and documentation to the right

engines, requires a rule on how to identify engine versions clearly

• Such a rule for the identification of engine versions must be valid for all Wärtsilä

Sulzer engine types

• In order to ensure this, specific rules are applied



Identification of 2-stroke Engines

RT… Basic type designation

RTA type designation for RT engines with a camshaft

RT-flex type design for RT engine with “Sulzer Common Rail”

Examples

7 RTA 84 T - B

6 RT-flex 58 T - B

Number of

cylinders

Type designation

Bore size in centimeters

Main application (see next page)

Modification letter



Main Application7 RTA 84 T - B

• C stands for Container ship or general fast ships

• U stands for Universal or general marine applications

• T stands for Tanker, Bulker or general slow ships

• F stands for Fixed installations like diesel power plants

NOTE: F is not standing for RT-flex so RTF is not an official engine identification

Proper writing 7RTA84T-B

6RT-flex58T-B

12RTA96C

There is no space between the numbers and letters



Modification Letter7 RTA 84 T - B

This letter must be decided in accordance with some requirements

All letters of the alphabet may be used from B onwards except C, F, T and U



Modification Letter is required if…

• The previous engine is offered and built in parallel to the new engine version

Example: RTA-2 and RTA-2U or RTA-2U and RTA-2U-B

• Engine is changed in its power and /or speed to scuh an extent that new data sheets and calculation programs (WinGTD) have to be issued

• Engine is changed in its characteristic such that a different propeller layout is required

• Engine is change externally in such a way that new installation drawings have to be made, i.e. modified engine can not be installed in the place of the previous engine without alteration to the engine room

• Engine is change internally in such a way that it is basically a new engine, i.e. engine description, manuals, drawings etc must be considerably modified



Who decides when to introduce a new Engine Identification

• Head of Technology department Wärtsilä Switzerland

• Licensees are not entitled to make any changes


RT-flex Control Elements Terminologies

• Operating side• Non-operating side• Driving end• Free end• Designation of cylinders• Clockwise rotating

• Counter-clockwise rotating• Designation of bearings• Thrust bearing• Top dead center• Bottom dead center


RT-flex Control Elements Assessment

1. How many main bearings does a 9 cylinder engine have.

2. Why is it forbidden to take out two adjacent lower main bearingsshells at the same time?

3. Make a principle sketch of a twin engine installation with a right- and left-hand engine.

4. What is the number next to the “RTA” indicating?

5. RTA84T-B, for what stands the letter “T”?

Documents

10-1_Engine Numbering & Identification