Emma Mærsk, Worlds Largest Container Carrier

Main Engine:

This engine includes a 2.5:1 gear, so while external gears had to be used in the sub, it's build-in here. The engine will be connected to the prop via a stern tube, and a flexible joint. More data will follow.

Regulator, main engine:
 

You will also need a regulator in front of the engine, and here I can suggest "Navy V40R" from Graupner, but this is not a critical choice. (The V40R runs on 4.8 -> 16V) Ask your local dealer for advice, and availability. Remember that it must be able to reverse the engine, be temperature protected, and capable of surviving the stall current of the engine. (If you travel forward, and then go directly to reverse without allowing the engine to stop first, then the stall current will be drawn for a short period of time.) The Navy V40R delivers 5.5V (via the BEC) to the receiver and servos, so this also solves the problem concerning the voltage for these components. The Navy V40R is watertight, and can be placed anywhere inside the hull, but do reserve space for cooling. Failure in this component will be devastating, as it is the power source for the receiver etc. so beware of the connections and temperature. The technical data are as follows:

 

Type:	Graupner part no.	Voltage range:	Current not cooled	Current water cooled	Current < 10s	Battery Elimination Circuitry out:	Height:	Length:	Width:	Weight:
Navy V40R	2875	4.8 - 16V	40A	60A	120A	5.5V 3A (Shortly)	13.5mm	60mm	29mm	30g.

Bow thruster Engine:

This bow thruster has an Ø22 tunnel, and will fit fine in the bow of Emma. More data will follow.

Regulator, bow thruster engine:
 

This regulator will run the bow thruster. What is great about it, is that it has a build-in failsafe, so the thruster will stop, should the ship get outside radio range. The reason for using a regulator, and not just a on/off switch for the bow thruster, is that this gives me much greater control over the vessel. It will be possible to mix this unit with the rudder channel via a switch on the remote, giving a much better rudder performance. Note: The BEC must be disconnected, as the RX will be powered by the other regulator!!!

 

Type:	Robbe part no.	Voltage range:	Current not cooled	Current < 10s	Battery Elimination Circuitry out:	Height:	Length:	Width:	Weight:
Regulator	ROB-8400	6-12V	20A	25A	5V 1,2A	25mm	46mm	37mm	60g

Servo:

This is the servo for the rudder. More data will follow.

Type:

Graupner part no.

Voltage range:

Current inactive:

Current active

Force: Ncm

Force: Kg

Active angle:

Speed:

Height:

Length:

Width:

Weight:

C577

4101

3.9

39mm

40mm

19mm

40g

Small switches:

Robbe makes some small, brilliant RC switches. They come with a jumper that allows you to set the switch function to be either latching, or momentary. Since mine will go on latching switches in the remote, the RC switches will be set to be momentary. (If set to latching, I would have to toggle them on and off, rather than having the switches follow the remotes manual switch.) The switch is also available in a double version, should you want it.

Type:	Robbe part no.	Voltage range:	Current inactive:	Current active	Height:	Length:	Width:	Weight:
RC switch	ROB-8444	4.8 - 6V		24mA	14mm	42.5mm	51mm	18g

Double end-point switch:

Uses transmitter stick end points or a 3 way switch, to switch functions on and off. Suitable for controlling a wide range of functions on model boats and submarines. Control two separate functions from one channel. (The two sounds, fog horn and engine alarm.) Can be used to control momentary or latching functions independently on each function. Microprocessor technology results in glitch-free operation. Built in failsafe operates on one or other function on loss of signal. Eliminates the hassle of servos and micro switches

Type:	Subtech part no.	Voltage range:	Current inactive:	Current active	Height:	Length:	Width:	Weight:
2 x End p-Switch	SES-3	?-24V		4A / output	10mm	58mm	23mm

Transmitter:

The transmitter needs to be able to handle the following functions: Engine forward / reverse, rudder port / starboard, bow thruster port / starboard, nav. lights on / off, radars and deck light on / off, and two sound effects. This is 8 functions. Note that the right stick end points will be used to control radars and deck light on / off via the SES-3. This little trick adds a channel to this 7 channel transmitter. The Graupner kit MC12 with expansions can handle what we need. Please refer to the chapter Remote Control Configuration for details. Being able to store up to eight different models, the MC12 just asks for use with both my sub, and Emma.

Receiver:

For the ship I choose a different receiver than I used for the sub, because this receiver offers something I found pretty cool: frequency channel scan. This allows me to use another receiver some day, and thereby have the sub and the ship on separate channels. This receiver also offers build-in failsafe for all channels! Features include: 8 servo outputs, PPM dual conversion, push-button frequency channel scan, programmable fail-safe, receiver monitor, digital servo analysis, LED voltage display and error indicator, automatic A-band and B-band detection, separate battery socket, no plug-in crystals required

 

Type:

Webra part no.

Voltage range:

Freq.

Current

Channel grid:

Sensitivity:

No. of servos:

Temp. range:

Antenna length:

Height:

Length:

Width:

Weight:

Scan DS8

20256/40

3.5 - 8V

40 MHz

15mA

10 kHz

0,7µV

8

15* to + 55*

1000 mm

18mm

57mm

31mm

25g

Webmaster: Robert Holsting