Engine Signs

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Overview

Engine Signs are the second most important sign used on navycraft servers. The signs make vehicles go, and tell the server how much it can move the vehicle.

There different kind of Engines. Each one is assigned a cost, speed and power level per the type of engine it is.

Most Engine signs are dedicated for use with Ships, while there specialty engines dedicated for Aircraft and Tanks.

How it Works

The following is description of engine signs. This is a brief description what they do.

Each block with Minecraft has Weight, normally 1 ton. Each individual type has maximum power of blocks i can move and maximum speed it can propel it's assigned vehicle. Together they add up to total tonnage.

Example a Ship could be 1000 Blocks. You want Engine that able to handle this weight, while producing enough movement go descent speed.

Engines have power and a fix maximum speed it can obtain, which basically comes down to if a Engine has 500 power rating. You would need if using this same engine at least 2 Engines to equal the weight. There is additional information relating to this under Technical Details which explains in details how this work.


Building Vehicles with Engines

When building a vehicle. A player will need to consider two factors; Weight and Cost. If

Technical Details About Engines

Note the following is not necessary for operation of the vehicle, however knowing how it works can help players determine how apply it to their creations.

Engine Ratings

The different engine types are rated by two factors...maximum speed and power.

Maximum Engine Speed - The fastest speed an engine type can propel a vehicle. The engine will only contribute to the total thrust of the vehicle up until this speed. If a vehicle is made to go faster than an engine's maximum speed (through the use of other engines), then the engine will make no contribution to thrust.

Engine Power - Power represents the total vehicle weight that the engine is able propel at maximum speed. If the vehicle weight is under the engine power rating, then the engine is capable of propelling the vehicle up to the engine's maximum speed by itself.

Single Engine Physics

The thrust contribution of each engine is calculated using a formula...

Engine Thrust = (Maximum Engine Speed) * ( (Engine Power) / (Vehicle Weight) )^2

As an example, let's take the engines of the DD-Atlantis, the Gasoline 1. It has Maximum Engine Speed = 10 and Engine Power = 500 .

If we equip this engine on a ship whose weight is under or up to 500, then that single engine will fully propel the vehicle up to the engine's maximum speed of 10.

If we equip this engine on a ship whose weight is over 500, let's say 1000, then we use the equation above...

Engine Thrust = 10 * ( 500 / 1000 )^2

Engine Thrust = 10 * ( 1 / 2 )^2

Engine Thrust = 10 * ( 1 / 4 )

Engine Thrust = 2.5

That one engine will propel our 1000 heavy ship to a speed of 2.5.

This equation is designed so that as ships get heavier, the thrust they produce quickly diminishes. At 2000, the engine thrust will be 0.625....at 5000, 0.1. There is little use in equipping small engines on large ships.

Multi-Engine Physics

Resuming our example above, where we have a single Gasoline 1 engine on a 1000 weight ship...we get a speed of 2.5....so now what if we add a second engine? This doubles our thrust. So with two engines we have 2 * 2.5 = 5 ...now we are going 5.

If we place four Gasoline 1 engines on our ship, we get 4 * 2.5 = 10 ...with four engines our ship will reach the Gasoline 1 engine's maximum speed. If we place additional engines beyond four onto this ship, they will have no contribution. Placing additional engines would be inefficient and a waste of money (although it is nice to have backups!).

As for combining engines of different types...engine's thrust contributions are calculated from slowest engines first to fastest. They do not add the same way that engines of the same type do.

Let's say you combine some boiler engines with a max speed of 6 with some gasoline engines with a max speed of 10. The boiler engines calculate to give you a total thrust of 6...while the gasoline engines calculate to give you a thrust of 7. The actual speed of your vehicle will be 7...only the thrust of the faster engine that is greater than the thrust of the slower engines will be counted.

So let's say, same example, boiler engines still giving us the full thrust of 6, but now our gasoline engines can only give us a thrust of 5. Our vehicle will go at speed 6, the gasoline engines will have no contribution.


Ship/Submarine Engine Types

The following engine types may be used on ships and submarines.

Gasoline

Gasoline engines are basic, inexpensive engines. They have a high top speed, however a low power rating. This makes them suitable for light small boats, like patrol boats and speed boats.

The gasoline engine will not work on a submarine that goes into submerged mode. The engine will shut down when the sub is set to dive.

Gasoline 1
  • Max Engine Speed=10
  • Power=500
  • Cost=$50
  • Server Examples=DD-Atlantis, DD-Wasp
Gasoline 2
  • Max Engine Speed=12
  • Power=700
  • Cost=$100
  • Server Examples=PT Boat, DD-Scorpion


Diesel

Diesel engines are medium sized engines that are not as fast as the gasoline engines, however they have a higher power rating and are more efficient for driving larger ships.

Diesel engines are also ideal for submarines as they have a submerged mode function...which means they are able to operate on submarines that dive. When a submarine is set to dive (through the SubDrive sign), diesel engines will go into ELECTRIC mode. While in electric mode the engine will produce half of it's normal thrust. When the sub is set back to surface mode, the engines will go back to fully ON and produce it's full thrust.

Diesel 1
  • Max Engine Speed=6
  • Max Engine Speed (submerged)=3
  • Power=800
  • Cost=$100
  • Server Examples=Uboat II, S-41 class submarine
Diesel 2
  • Max Engine Speed=8
  • Max Engine Speed (submerged)=4
  • Power=1400
  • Cost=$250
  • Server Examples=Uboat VII, Maru Ammo Carrier
Diesel 3
  • Max Engine Speed=10
  • Max Engine Speed (submerged)=5
  • Power=2500
  • Cost=$1,000
  • Server Examples=Balao class submarine

Boiler

Boilers are large engines for large ships. They have roughly the same speeds as the diesel engines, however they also have much higher power ratings and are the most efficient engines for large ships.

Boilers will not work on a submarine that goes into submerged mode. The engine will shut down when the sub is set to dive.

Boiler 1
  • Max Engine Speed=8
  • Power=1800
  • Cost=$250
  • Server Examples=CL-Castle
Boiler 2
  • Max Engine Speed=10
  • Power=2000
  • Cost=$600
  • Server Examples=CL-Fortress, DD-Fletcher
Boiler 3
  • Max Engine Speed=10
  • Power=4000
  • Cost=$1,250
  • Server Examples=CA-Spartacus

Motor

Motor represents an electric motor. Motors have the ability to operate underwater on submarines at full speed. They are light weight engines...they are faster than any diesel engine when underwater, however they have a very low power rating. They are ideal for mini-subs.

When equipped on a submarine and set to dive, motors will remain ON and continue operating at full thrust. There is only one motor available on Iron Seas...

  • Max Engine Speed=6
  • Max Engine Speed (submerged)=6
  • Power=500
  • Cost=$150
  • Server Examples=Mini-subs

Nuclear

Nuclear engines are the modern day "super engine" for ships and subs. They are extremely expensive, but come with a very high max speed and power rating.

Nuclear engines also are capable of operating at full thrust when used underwater on a submarine. There is only one nuclear engine available on Iron Seas...

  • Max Engine Speed=14
  • Max Engine Speed (submerged)=14
  • Power=6000
  • Cost=$10,000
  • Examples=LA-Class Submarine

Aircraft Engine Types

The following engines should only be used on aircraft.

Light Aircraft Engines

Small standard engines for aircraft.

Airplane 1
  • Max Engine Speed=14
  • Power=140
  • Cost=$50
  • Examples=AT-6 Texan
Airplane 2
  • Max Engine Speed=16
  • Power=140
  • Cost=$80
  • Examples=F4F Wildcat
Airplane 3
  • Max Engine Speed=16
  • Power=160
  • Cost=$120
  • Examples=TBF Avenger, JU-87 Stuka
Airplane 4
  • Max Engine Speed=18
  • Power=160
  • Cost=$160
  • Examples=F6F Hellcat

High Performance Aircraft Engines

Engines for high performance fighters.

Airplane 5
  • Max Engine Speed=24
  • Power=180
  • Cost=$400
  • Examples=F4U Corsair
Airplane 6
  • Max Engine Speed=24
  • Power=240
  • Cost=$500
  • ''Examples=P38 Lightning

Heavy Aircraft Engines

Engines for large and heavy aircraft.

Airplane 7
  • Max Engine Speed=18
  • Power=300
  • Cost=$500

Jet Aircraft Engines

Jet engines are the modern day "super engines" for aircraft. They have a really high max speed and power rating, but are extremely expensive.

Airplane 8
  • Max Engine Speed=28
  • Power=500
  • Cost=$5,000

Helicopter/VTOL Engine Types

Helicopter/VTOL engines do not currently exist on the server but are under development.

Tank Engine Types

The following engines are suitable for tanks and any land vehicles.

Light Tank Engines

Tank 1
  • Max Engine Speed=4
  • Power=200
  • Cost=$50

Heavy Tank Engines

Tank 2
  • Max Engine Speed=8
  • Power=400
  • Cost=$5,000

Notes

  • The Original Author of the Technical information for the Engine signs is Maximuspayne, one the main coders who created the original version of Navycraft.