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jet-planes-cannot-move-in-free-space-why-java I have some stations/ships with fake interiors that Id like to be able to float around in helmet-free. and thanks for maintaining this mod.  When I try to launch the plane, it refuses to move and crawls at m/s at full thrust. Then if I try to tilt upwards with the wings, it will increase speed and shoot of at m/s. If I stop moving wings, the plane at full thrust will decelerate and crash. Does anyone know why this is happening? I'm not great at building planes, but I am completely lost at what is going on here. Also I have no mods installed this is stock only. Edited August 1, by Moonfrog. In this week's QA, Fraser answers questions about why jet planes can't fly into space, what does he mean when he says "the Universe", and why we need to. The highest-flying jet plane in level flight was the Lockheed SR Blackbird with a height of 85, or 25, meters and where the air density is just 2% of that at sea level. At that height it’s travelling at around Mach , or mph. The SR pilots had to wear a full pressure suit with its own oxygen supply in case of a cockpit depressurization or emergency ejection.  They also don’t work in space because there is no air with oxygen in it to combust the fuel. So, This is why space vehicles are launched by rockets. Rockets can have much more power, and can operate from a speed of zero on the Launchpad to Mach 33 and beyond which is the escape velocity of earth.

Code Review Stack Exchange is a question and answer site for peer programmer code reviews. It only takes im minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. Write a Java class "Air Plane". Object-property names and types are given and compulsory.

Write the according constructor and getter- setter-method. Check within the constructor the given values for whhy valid. Further requirements concerning the implementation of the methods I have written into my code as comments.

So therefore: I would appreciate your comments and hints concerning my implementation of the described task. Consider the " builder pattern ". As I started to pass in arguments to the constructor, it was hard to keep the semantics right. The builder pattern has only one assertion: It doesn't matter how many arguments you passed in, it will always build a consistent object.

Return-statements are structural identical to goto-statements although they are a formalized version. What all goto-alike-statements return, continue, break hav in common: They are not refactoring-stable. They hinder you to apply reforings like "extract method".

If Jet Planes Cannot Move In Free Space Why You you have to insert a new case in an algorithm that uses break, continue and return-statements you may have to overthink the whole algorithm so that your change will not break it. These return values may be sufficient for trivial cases in trivial environments where less exceptional cases occur.

In complex environment a method execution may fail due to several reasons. A connection to the server was lost, an inconsistency on the database-side was recognized, the execution failed because of security reasons There modern languages introduce a concept for "exceptional" cases: Exceptions.

I suggest to not publish true or false. I suggest to have either frre return value or the new value of the loadWeight.

Exceptional cases I would handle with the concepts of exceptions. I would expect a signature like this:. The OverloadedException may not be signature relevant RuntimeException but it expresses the intention of the method. If you want to make comments it is an indicator for that your code itself may not be clear enough.

I intentionally said "avoid comments" but not "do not comment anything". First think planez the things that will be compiled and run to be as clear as possible. Then if you think it's neccessary to comment then comment.

Comments have to be maintained separately. They are "uncompiled" code and cannot be be put under test. So they may lie if they diverge from your code semantics. In your comment you mentioned that "liter" may be negative.

This is an allowed value but your method signature Jet Planes Cannot Move In Air Free Space Why Quota says "fillUp". So one of them is lying. You now have two possibilities:. The best "comment" for a "procedure", "function", "method" is a set of tests that show the usage of it so other developers can see, how your code will work in different situations.

Instead of testing your object in a main-scope I suggest to make You should decide which coverage you want to aim. I prefer condition coverage over statement coverage because it moe you to keep your methods small. If you have long methods with several conditions your test case count may explode.

As you see in the test cases, I have comments. They describe the business rules you want to enforce. Not only can maxWeight and the other parameters invalidly be negative, it can also be exceeded by the the loadWeight. Planes travel large distances, possibly reaching countries far far away, where people might use the imperial system or even other, more arcane ones.

You have an implicit contract of what units the values should be given in. That contract is not clearly communicated. Are the weights in metric tonnes? The fuel in gallons? Imperial units were used for the sections designed by the British team and metric units for those designed by the French team. And even within the metric system for example, do you use kg, t, g, … for weight?

You have to clearly document what units you are expecting. Ideally, you'd use some built-in mechanism to work with units. Basically speaking, the dimension of a variable is specified and then the conversion of units jet planes cannot move in free space why java that dimension. Sadly, the proposal linked to above was withdrawn, because nobody cared to do it.

I guess there are other libraries in place that do this. It's out of scope for a beginner program and nobody expects you to use a system like this. This paragraph is just FYI. Parsing the ternary operator is a bit harder to read.

This might be personal preference. There's also a blurry line where simplifying code becomes obfuscation to cryptic one-liners. Don't be tempted to write everything jet planes cannot move in free space why java as little code as possible. You have to draw that line for yourself. Even if you have some validity checks, you have to come up with a contract on how they are enforced.

What should happen if some invalid value is passed to your class? Maybe you want to throw new IllegalArgumentException "Negative weights aren't possible. There is no clear right or wrong here. Poanes a matter of how you design your class. What's important plands that you communicate whatever you do clearly.

Even jet Jet Planes Cannot Move In Air Free Space Why Item planes cannot move in free space why java you don't perform any validity checks, you should explain this to possible users of your class: " Hey there, if you pass nonsense to this class, it won't check for that and you have to live whatever garbage it produces as a result.

In yours it's obviously not, because you were asked jaa do them. This is a subjective one. When I read kerosinStorageI jet planes cannot move in free space why java with that the size Are Pascall Jet Planes Gluten Free Quiz of cannt tank or container that the kerosene is stored in.

In your code it is the actual amount of kerosene left in the plane. I suggest to jwt that name to just kerosene. Either make this method a jet planes cannot move in free space why java or rename it to addKerosene or something like that.

Admittedly, this is more about code duplicationbut I could not resist completing the trilogy. That's a bit misleading, because if you have setters for properties, you should perform the validity checks in the setters, not in the constructor. As you have it right now, you have duplicated code to limit the value canot kerosinStorage.

You do it once in the constructor:. In your current code, you have some validity checks in the setter methods fillUp and loadbut they are not called in the constructor. Don't make your ,ove members private if you offer public getters and setters without any functional logic. Just make your members public. This saves you 70 i. It makes your class more readable, the access of the variables less complicated and saves Bytecode. Sign up to join this community.

The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with jet planes cannot move in free space why java private group. Create a free Team What is Teams? Learn more. Asked 4 years, 4 months ago. Active 1 year, 10 months ago. Viewed 4k times. Moreover are the following methods to implement: info load fillUp fly getTotalWeight getMaxReach Further requirements concerning the implementation of the methods I have written into my code as comments.

Expect 1 liter Kerosin as 0. The parameter 'liter' can be a negative number. Doesn't have to jet planes cannot move in free space why java overfilled. Prevent a negative number as value of the 'kerosinStorage' property!

It passed that test but I'm still not sure about it.

A rocket carries oxygen with fuel so that fuel can be burnt with the help of oxygen in space results to release hot gases but a jet carries only fuel Coz it get oxygen from our Earth's atmosphere therefore it can't work in space. Sep 12,  · A jet could fly in space. It couldn't produce thrust, maneuver, or keep the cabin pressured in space. Use a rocket to put it into orbit and it will fly until gravity eventually pulls it back down. The strict definition of flying is to move through the atmosphere and . Why jet planes cannot move in air-free space? Contrarily, jet has only fuel. It takes oxygen from the atmosphere to burn the fuel. Jet engines have two openings one .

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