Aircraft Design Povver Loading Objective: Create a power loading class (model th

Question

Aircraft Design Povver Loading Objective: Create a power loading class (model that estimates power loading for 7 types of aircraft. What is Power Loading? Power loading is a term that dates to the earliest days of aircraft design, and it is simply the weight of the aircraft divided by its power W/hp, where weightis in pounds Power loadings typically range from 10 to 15 pounds per horsepower for small aircraft. A large power loading indicates a small engine for a given aircraft weight. High performance aircraft have power loadings aslowas 6 lbs/hp. Fields vmax is the maximum desired velocity of the aircraft in knots. hp is the maximum estimated horsepower of an engine in lbs. Methods Provide seven distinct methods that each return a value based upon the following formulas ixed Gear 215V 172V hp Acrobat hp Retract Gear WM 276V 511V. Ragwing hp Aluminum Fixed Gear W 248V 325V hp Ultralight hp Composit Retract Gear WK 680V hp Compos

Explanation / Answer

//PowerLoading.java
public class PowerLoading {

   private double vmax;
   private double hp;

   public PowerLoading(double vmax, double hp) {
       this.vmax=vmax;
       this.hp=hp;
   }

   //Returns the weight of fixed gear almunimum
   public double getWtOfFixedGear(){      
       double W=215.0*Math.pow(vmax,-0.61);      
       return W/hp;
   }

   //Returns the weight of retract gear almunimum
   public double getWtOfRectractGear(){      
       double W=276*Math.pow(vmax,-0.65);
       return W/hp;
   }

   //Returns the weight of fixed gear composite
   public double getWtOfFixedGearComposite(){      
       double W=248*Math.pow(vmax,-0.61);
       return W/hp;
   }

   //Returns the weight of fixed gear almunimum
   public double getWtOfRectractGearComposite(){      
       double W=680*Math.pow(vmax,-0.39);
       return W/hp;
   }

   //Returns the weight of Acrobatic aeroplane
   public double getWtOfAcrobatic(){      
       double W=172*Math.pow(vmax,-0.61);
       return W/hp;
   }

   //Returns the weight of ragwing aeroplane
   public double getWtOfRagwing(){      
       double W=511*Math.pow(vmax,-0.75);
       return W/hp;
   }

   //Returns the weight of ultralight almunimum
   public double getWtOfUltralight(){      
       double W=325*Math.pow(vmax,-0.75);
       return W/hp;
   }
  
   //Returns maximum take off weight
   public double MTOW(double pwrlding){
       return pwrlding*hp;
   }
  
  

}

-----------------------------------------------------------

//Tester.java
public class Tester {
  
   public static void main(String[] args) {
  
       //Set vmax and hp
       double vmax=150;
       double hp=180;
      
      
       //Create aninstance of PowerLoadig with vmax and hp
       PowerLoading ploadin=
               new PowerLoading(vmax,hp);
      
       System.out.println("vmax = "+vmax+" knot");
       System.out.println("hp = "+hp+" jp");
       double pl=ploadin.getWtOfFixedGear();
       System.out.printf("Power loading of fixed grear : %5.2f ",pl);
      
       System.out.println("MTOW = "+ploadin.MTOW(pl));
      
      
       pl=ploadin.getWtOfAcrobatic();
       System.out.printf("Power loading of Acrobatic : %5.2f ",pl);  
       System.out.println("MTOW = "+ploadin.MTOW(pl));
      
       pl=ploadin.getWtOfFixedGearComposite();
       System.out.printf("Power loading of FixedGear Composite : %5.2f ",pl);  
       System.out.println("MTOW = "+ploadin.MTOW(pl));
      
       pl=ploadin.getWtOfRagwing();
       System.out.printf("Power loading of Ragwing : %5.2f ",pl);  
       System.out.println("MTOW = "+ploadin.MTOW(pl));
      
       pl=ploadin.getWtOfRectractGear();
       System.out.printf("Power loading of Rectract Gear : %5.2f ",pl);  
       System.out.println("MTOW = "+ploadin.MTOW(pl));
      
       pl=ploadin.getWtOfRectractGearComposite();
       System.out.printf("Power loading of Rectract Gear Composite : %5.2f ",pl);  
       System.out.println("MTOW = "+ploadin.MTOW(pl));
   }

}

-----------------------------------------------------------

Output:

vmax = 150.0 knot
hp = 180.0 jp
Power loading of fixed grear : 0.06
MTOW = 10.116325436157744
Power loading of Acrobatic : 0.04
MTOW = 8.093060348926194
Power loading of FixedGear Composite : 0.06
MTOW = 11.669063758916838
Power loading of Ragwing : 0.07
MTOW = 11.922091642784522
Power loading of Rectract Gear : 0.06
MTOW = 10.627956389760246
Power loading of Rectract Gear Composite : 0.54
MTOW = 96.34591856673724

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