jet engine - hornby railways · pdf fileidentify all the component parts and study the...

Jet Engine

A20005

A Product Hornby Hobbies Limited, Margate, Kent CT9 4JX UK Tel:+44(0)1843 233525 www.airfix.com

Batteries required:4 x 1.5 V - (Not included)

Hornby Hobbies 4/A20005A - R1 0610

Please retain these instructions and the address for future reference

Identify all the component parts and study the assembly sequences thoroughly before comencing assembly of the Jet Engine

Remove the plastic parts from the plastic runners as they are required

Remove any burrs from the plastic parts when separating from the plastic runners to assist when assembling

Study the assembly sequences for the electric components to battery box to ensure the electric cables are correctly instal led and connected for the successful operation of the power control unit, fan motor and nacelle light unit

Tools required to assemble the kit

Kit Parts - Engine Fan Blades

Kit Parts - Engine Turbine and Compressor Blades - Numbers 1 and 2

Kit Parts - Engine Turbine and Compressor Blades - Numbers 1 and 2

Leave components on the sprue until required.

12

21

3

SHO

RT BLADES

LON

G BLAD

ES

3

Battery Safety Guidelines

Used correctly, domestic batteries are a safe and dependable source of portablepower. Problems can occur if they are misused or abused – resulting in leakageor, in extreme cases, fire or explosion.

Please follow these simple guidelines to eliminate the possibility of such problems:

Only use good quality Alkaline batteries. To fit the batteries, refer to the instructions and the diagram inside the battery compartment. Make sure battery compartment lid is firmly secured.

Do not use re-chargeable batteries.

Do not short-circuit battery terminals.

Always take care to fit batteries correctly. Observe the plus and minus signs onthe batteries and in the battery compartment.

Always replace the complete set of batteries at one time, taking care not tomix old and new batteries or batteries of different types.

Always store unused batteries in their packaging and away from metal objectswhich may cause short-circuits.

Always remove dead batteries from equipment. Remove batteries fromequipment which you know will not be used for a long time, otherwise the batteries may leak and cause damage.

Always supervise children if they are replacing batteries themselves to ensure these guidelines are followed.

Always make sure that battery compartments are secure.

Never dispose of batteries in a fire as this can cause them to explode.

Never attempt to recharge ordinary batteries as this may cause fire or explosion.

Waste electrical products should not be disposed of with household waste. Please recycle where facilities exist. Check with your Local Authority or retailer for recycling advice.

Kit Parts - Securing screws and Instrument Panel Sticker

Kit Parts - Circuit board and voltage regulator, power switch and fan motor

Kit Parts - Battery cover, pylon half, plug, engine spindlespacers and washers and battery terminals

5

Assembly sequence 64



Note: Batteries are not supplied

Four batteries,1.5 volt - size C, are required to operate the completed Jet Engine model

To ensure a power suppy to the motor, the batteries must be correctly installed into the battery compartment as indicated

Push the securing bolt, for the battery box cover plate, through the hole in its lower lug.

Turn the cover plate over and place the clear retaining washer onto the bolt to secure the bolt to the cover plate

Push the locating lugs of the battery box cover into the locating holes of the battery box/base plate

jet engine

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jet engineAssembly sequence 58



Assemble the engine turbine/ compressor blades unit into the outer engine casing half.

Assemble the inner engine casing half onto the outer engine casing half aligning the screw holes.

Note: The inner casing half has a locating lug to ensure correct positioning into the inner engine nacelle half.

Secure the two engine casing halves with four screws, and at this stage check that the fan blades spin freely by blowing on them.

NOTE: If they do not spin freely, it is because the fan blades have been fitted too tightly together on the spindle, so remove the casing and gently ease the fan blades further apart.Blades must have “end float” when in position.

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Assembly sequence 1

Assembly sequence 2

Assembly sequence 3

Locate the push button into the top cover with the cut-out positioned

to the top of the push button

Locate the switch unit over the top of the push button and secure the

switch with two screws

Overview of the switch and button assembly secured inside the top

cover

7

Assembly sequence 7

Assembly sequence 8

Assembly sequence 9

Position the lever arms, voltage regulator and circuit board into the

base unit

Push the lever slides onto the lever arms

Overview of the electric cable connections between the base unit and base cover after

assembly

Connect the RED wire from the voltage regulator (speed control) to battery terminal

“B” with the nut and screw provided.Connect the BLACK wire from the starter

switch to the BLACK wire from the voltage regulator (speed control) by twisting together

and covering with sleeve as shown in sequence 10.

Connect the red wire from the starter switch to battery terminal “C” with the nut and screw

provided.(Nut and screws connections are to be used on wires

with ring terminals.)

See assembly sequences 10 to 18 for the correct method of connecting the electric cables

A

C B

RED RED

RED

BLACK

BLACK

9




Assemble the 1st stage compressor blades, numbers 1 and 2, the cone, spacer and spindle washer onto the spindle as indicated.Please make sure that you assemble the correct size blades (SHORT).

Assemble the smaller 2nd stage compressor blades with the spacer and coned blade to the rear, as indicated, onto the spindle.

Assemble the 1st stage turbine blade with coned end facing forward and fit the mating turbine blade No. 1, with collar, also facing forward.

Assemble the larger 2nd stage turbine blades. The coned end of the first turbine blade faces forward and the mating turbine blades, numbers 1, 2, and 3 are fitted with their collars also facing forward.Please make sure that you assemble the correct size blades (LONG).

With the turbine blades in position fit the end cap with collar facing forward into the recess of the rear mating turbine blade.

jet engine

12

SHO

RT BLADES

21

3

LON

G BLAD

ES

24

jet engineAssembly sequence 46



Push the air directional tubing through the lower aerofoil half and position the motor housing onto its cradle

Motor housing and air directional tubing in position

Position the top aerofoil half onto the lower aerofoil half

22




Slide the shrink sleeve over folded exposed cable ends

Apply heat using a hair dryer to secure the shrink sleeve in position

Cut a piece of shrink sleeve to the appropriate size and slide the

shrink sleeve over exposed cable ends

A

A

B C

RED

BLACK

RED

11




The battery cover securing nut and blanking plug are positioned into

the aperture as indicated in assembly sequences 20 and 21

Place the nut into the aperture and allow it to drop inside

Push the plug fully into the top of the aperture to lock the securing nut permanently inside aperture

13




Push the collar of the air directional tubing onto the fan motor housing unit.

Note: The collar is recessed to fit onto the motor housing. Ensure the collar is pushed securely in position over the two halves of the fan outer casing to hold them together

Connect the motor electric cables to the engine light unit supply cables by twisting them together as indicated, red to red and black to black

Cut two pieces of shrink sleeve to length and thread over the joined cables as indicated

jet engine

RED

BLACK

BLACK

RED

20




Secure the pylon to the lower aerofoil half using two screws with integral washers

Thread the motor electric cables through the hole in the lower aerofoil half and position the upright support pins into the location holes of the lower aerofoil half and engine nacelle unit

Secure the lower aerofoil to the upright support unit using two screws

jet engine

18




Locate the top cover and support unit onto the base unit and place

the control levers through the holes in the top cover

Secure the base unit to the top cover using six screws

Push the control lever handle onto the control lever arms

15




Thread the motor electric cables through the hole in the top of the upright support unit

Position and secure the upright support rear cover onto the upright support using six screws

Locate the outer pylon cover onto the inner engine nacelle and pylon half

Note: Ensure the electric cables from the nacelle light unit are threaded through the pylon as indicated before assembling the units

jet engine

16




Secure pylon halves using two screws

Thread the electric cables through the lower aerofoil as indicated

Locate the pylon and inner engine nacelle unit into the lower aerofoil

half

17




Assemble the fan blower air directional tubing as indicated

Ensure the vertical down tube with locating notch (clear solid plastic)

engages with the cut-out in the right angle elbow piece (clear solid plastic). This will ensure that the air

passes through the tubing in the right direction to turn the engine

turbofan blades when the fan motor is switched on

Locate the fan blade onto the motor spindle ensuring that it is fully

pushed onto the spindle to prevent rubbing on the outer casing

Push the outer casing over the fan blade

This is a very tight fit - ask an adult to help.

19




Push the location pins to the upright support, into the top cover location holes

Note: Ensure the pins to the upright support are the correct way around to ensure the electric cables from the power controller can be fed through the access holes when assembling the base unit

Secure the upright support to the top cover using two screws as indicated

Offer the assembled base unit to the top cover and thread the electric motor connections from the power control unit into the upright support unit

jet engine

14




Push the exposed cable end through the hole in the battery terminal post

Secure the cable end onto the battery terminal post

Slide the shrink sleeve over the battery terminal post and connected cable, and apply heat using a hair dryer to shrink the sleeve in position

jet engine

B C

B C

B C

RED

12




Connect the exposed cable ends to the wires from the motor housing by twisting them together as indicated

Red to Red and Black to Black

Double check the polarity of wires are correct, Red in + ve and

Black in – ve,Slide the shrink sleeve over the

wire joints

Apply heat using a hair dryer, shrinking the sleeve an to the

joint wires

_

+

_

+

_

+

RED

BLACK

RED

BLACK

RED

BLACK

21




Secure the aerofoil halves together using four screws

Assemble the large front fan engine blades

Push the engine spindle into assembled large fan blades

23




Twist the exposed cable ends together

Cut a length of shrink sleeve and slide over the cables

Fold the exposed cable ends to secure them together and to enable the shrink sleeve to pass over the top of the exposed part of the cables

jet engine

A

A

A

BLACK

RED

10

Assembly sequence 4

Assembly sequence 5

Assembly sequence 6

Insert the battery terminals inside the battery aperture as indicated

Ensure the terminals with connection posts are pushed firmly into their location slots with their posts protruding through the box cover

Ensure that the ‘D’ shaped shaft of the voltage regulator is fully rotated in a anticlockwise direction before inserting into the mating aperture of the control lever.

See assembly sequence 6

Push together and assemble the lever arms, ensuring that they are both aligned as shown, and push the ‘D’ shaped shaft of the voltage regulator into the mating aperture of the right-hand lever arm

jet engine

8




Push the tailcone halves together

Assemble the spacer, washer and tailcone onto the spindle

Assembled engine fan/turbine/ compressor blade unit

25




Assemble the turbine blade and engine casing into the inner engine nacelle locating the casing lug into

the nacelle notch.

Note: Secure the electric cabling with adhesive tape into the engine

nacelle as indicated

Assemble the clear outer engine nacelle half onto the lugs of the

inner engine nacelle half. Click and secure into position

Insert the instrument panel sticker into the recess to the top of the

base cover

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Kit Parts - Turbine blade spindle, shrink sleeve and clear tube

Kit Parts - Various

Kit Parts - Engine casings, air ducting elbow and down tube

jet engine

6

Kit Parts - Lower and Upper Aerofoils

Kit Parts - Base and Cover

Kit Parts - Outer and Inner Engine Nacelles

Kit Parts - Rear Cover and Upright Support

jet engine

4

Assembled kit

To operate the Jet Engine, press the button to start the motor and

then rotate the lever handle to increase or decrease the power to

the engine turbine blade assembly


Using a cross head screw driver,tighten the bolt to secure the

cover plate to the base

29

jet engineThe Jet Engine

The jet engine was developed simultaneously by Great Britain and Germany in the 1930s. A young flying officer in the British Royal Air Force, Frank Whittle, and a German physics student, Hans von Ohain both developed the idea at the same time for a turbojet power plant which over the years has become the jet engine as we know it today.The original turbojet jet engine was a breakthrough in engineering which enabled aircraft to fly up to speeds of 500mph, today the jet engine has been developed so that they can fly at up to three times the speed of sound which is nearly 2000mph!The jet engine is in the shape of a barrel with both ends open. Huge quantities of air are sucked into the front end and then compressed with the use of fan blades. The compressed air is fed into the combustion chamber at the centre of the engine. A constant spray of fuel is fed into the chamber which then mixes with the air inside. When the air and fuel mixture burns it becomes extremely hot which causes the mixture to expand massively. This expansion makes the hot gases rush out of the exhaust nozzle at the back of the barrel-shaped jet engine. As the air rushes out of the jet engine a big fan known as a turbine spins around and sucks more air into

the front of the engine through the forward compressor. As the gases rush out of the jet engine this causes the engine to move for-ward, this is based on the famous scientist Sir Isaac Newton’s Third Law of Motion. Newton discovered that for every action there must be an equal and opposite reac-tion, so the big push of gases out of the back of the jet engine (or backward thrust) results in an equally strong push forward (forward thrust). The faster the jet engine spins, the more air is sucked in which, in turn creates more power. When you have built your Jet Engine switch it on and move the handle backwards and forwards to adjust the speed and see how the engine works. Today jet engines based on the original design are used for most Military aircraft, however, the design has been adapted for use on large passenger aircraft to make the engine both quieter and cheaper to run. By increasing the size of the front fan blades part of the air is fed directly to the turbine at the back while the rest of the air is directed through the centre of the engine. The colder air fed to the back mixes with the hot gases from the turbine which expands to give greater thrust from the same amount of fuel. Since its invention the jet engine has made the world a smaller place allowing people to travel large distances at speeds they would have never dreamt of before.

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Notes

jet engine - hornby railways · pdf fileidentify all the component parts and study the...

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