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HSB 99 222 Steam-Engine

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UPDATE 1: Updated water-tanks, updated coal-compartment, cabin interior overhaul and some minor details added.

In the beautiful Harz Mountains in central Germany lays the world's largest steam rail network. It is operated by the HSB Hartzer Schmalspurbahnen. Their most famous engine is the 99 222. She is a 2-10-2 tank engine build in 1931 by Berliner Machienenbau AG and commissioned by the (GRB) German National Railways).

A friend of mine invited me to the Hartz for a holiday and because the both of us are Lego and steam train fans he suggested I should make a scale-model of the 99 222, our favourite engine. So I sat down with a lot of Lego (sadly not enough), LDD, Stud.io and lot of pictures of the real deal. After hours of designing and a lot of trial and error I finished what I think is my best steam  engine yet.

Some technical data of the model:


Parts                                    



Parts            1010                



                                             



Dimensions                         



Units            Length Weight Height



Centimeters 30,80   8,90      10,90



Inches          12,10   3,50      4,30



Studs            38,50   11,10    13,60



                                             



Weight                                 



Units            Weight             



Grams          596,00             



Ounces         22,02               



2x4 Brick     259,13             


Some specifations of the real model. Sourced from Wikipedia:


Number(s)                              DRG: 99 221 – 99 223



                                                 DR from 1970: 99 7222-5



Quantity                                  3



Manufacturer                         Berliner Maschinenbau



Year(s) of manufacture        1931



Wheel arrangement              2-10-2T



Axle arrangement                 1′E1′ h2t



Type                                        K 57.10



Track gauge                          1,000 mm (3 ft 3 3⁄8 in)



Length over buffers              11,636 mm (38 ft 2 in)



Height                                     3,650 mm (11 ft 11 11⁄16 in)



Width                                      2,550 mm (8 ft 4 3⁄8 in)



Wheelbase                            4,800 mm (15 ft 9 in)



Overall wheelbase               8,700 mm (28 ft 6 1⁄2 in)



Empty weight                        50.2 tonnes (49.4 long tons; 55.3 short tons)



Service weight                      65.8 tonnes (64.8 long tons; 72.5 short tons)



Adhesive weight                   50.5 tonnes (49.7 long tons; 55.7 short tons)



Top speed                             40 km/h (25 mph)



Indicated Power                   650–700 PS (480–510 kW; 640–690 hp)



Starting tractive effort         102.97 kN (23,150 lbf)



Driving wheel diameter      1,000 mm (3 ft 3 3⁄8 in)



Carrying wheel diameter   550 mm (1 ft 9 5⁄8 in)



No. of cylinders                   Two, outside



Cylinder bore                       430 mm (16 15⁄16 in)



Piston stroke                        400 mm (15 3⁄4 in)



Boiler Overpressure           14 bar (1.40 MPa; 203 psi)



No. of heating tubes           114



No. of smoke tubes            32



Heating tube length            3,500 mm (11 ft 5 3⁄4 in)



Grate area                           1.78 m2 (19.2 sq ft)



Radiative heating area      7.7 m2 (83 sq ft)



Superheater area               33.3 m2 (358 sq ft)



Evaporative heating area  95.9 m2 (1,032 sq ft)



Water capacity                    8 m3 (280 cu ft) or 8,000 litres (1,800 imp gal; 2,100 US gal)



Fuel                                       Coal: 3 tonnes (3.0 long tons; 3.3 short tons)



Parking brake                      counterweight brake



Locomotive brakes            vacuum-controlled compressed-air brake †



Train brakes                        originally K-P m.Z. and Schleifer driver's brake valve.



                                     



  
I hope you like my model as much as I liked designing it and please feel free to give any feedback.
Thank you for your time.



 



 



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