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JetCom SR 71 Blackbird EDF, Construction Manual

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JetCom SR 71 Blackbird EDF Construction Manual Download Page 2

+++ construction manual SR 71 Blackbird (EDF Version) from ++ 

List of material: 

 

Part no.  Material 

Application 

1+2 

6 mm multiple bonded 
plywood 

Main gear mount point 

3 

6 mm multiple bonded 
plywood 

Nose gear mount point 

4* -------------- 

--------------------- 

5 

Poplar plywood 

Servo mounting frame 

6* -------------- 

--------------------- 

7+8 

Plastic molding 

Servo covering 

9 

Carbon sticks 

Rudder fixing 

10+11 Composite 

Intake 

rings 

* applicable only for turbine version 
 
 
 

Overview of provided frames*: 

 

1

2

3

4

4

5

5

5

5

6

6

7

8

9

9

 9

9

  

 

 
*Frames no. 4 and 6 are applicable only for the turbine version and will not be 
included in delivery of the EDF version.

 

 

 

Page 3 of 20 

EDF version 1.0 

Summary of Contents for SR 71 Blackbird EDF

Page 1: ... 4 Mounting of nose gear 5 Mounting of elevons 6 Installation of the rudders 7 Mounting of the rudders 9 Installation of the servos 10 Installation of the EDF 11 Installation of the battery 15 Suggestion for the installation of the interior equipment 16 Centre of gravity and throws 20 Recommended accessories 20 Spare parts 20 Page 2 of 20 EDF version 1 0 ...

Page 2: ... gear mount point 4 5 Poplar plywood Servo mounting frame 6 7 8 Plastic molding Servo covering 9 Carbon sticks Rudder fixing 10 11 Composite Intake rings applicable only for turbine version Overview of provided frames 1 2 3 4 4 5 5 5 5 6 6 7 8 9 9 9 9 Frames no 4 and 6 are applicable only for the turbine version and will not be included in delivery of the EDF version Page 3 of 20 EDF version 1 0 ...

Page 3: ... 46 mm x 36 mm and be made on the bottom of each wing half Please ensure the cut outs do not exceed the size given above to avoid damaging the retract plate frames Trial fit the retract plates into the retract frames already glued in the wing Use Hysol epoxy or similar to glue the mounting plates into position Make sure the retracts are 90 degrees to the fuselage to ensure a proper working retract...

Page 4: ...the bottom of the wing and the fuselage Cut the wing skin to allow the struts to retract properly in and out making sure you have enough clearance Mounting of nose gear A cut out needs to be trimmed in the fuselage nose to enable the mounting of the retract plate as demonstrated on the following pictures Page 5 of 20 EDF version 1 0 ...

Page 5: ...the elevons making sure they are well spaced out The wing and elevons have balsa inserts to accommodate the hinges Glue the hinges in place using good quality epoxy or equivalent Be careful that the joints of the hinges keep free of epoxy if necessary bedabble them with some oil or silicon to ensure their flexibility For safety reasons we recommend to dowel the hinges additionally so that they are...

Page 6: ...ctional as follows You need to cut the rudder as shown in the pictures below A balsa structure frame is provided inside the rudder This frame is located in the middle of the saw kerf for fixing the hinges To allow mobility you need to add a piece of balsa wood at the front of the rudder Afterwards the balsa should be tapered by grinding it Now you need to glue the hinges in the front of both parts...

Page 7: ...ed in the kit Using a razor saw cut the skin of the rudder to accommodate the servo and the servo tray The size of the cut out can be found on the picture below Now you can glue the servo tray into the rudder Afterwards you can fix the servo The servo and the rudder are connected by a 2 mm connecting rod which is fixed by a rudder horn as demonstrated on the next picture Page 8 of 20 EDF version 1...

Page 8: ...ike you did for the first only side inverted For optical reasons we recommend to locate the servos on the inner side of the rudder Mounting of the rudders The rudders are connected with the fuselage by using the provided 6 mm carbon rods Roughen the carbon rods carefully Than you can glue the carbon rods in place by using good quality epoxy or equivalent Page 9 of 20 EDF version 1 0 ...

Page 9: ...an flatten the gap with smoothing cement Installation of the servos On the bottom of the fuselage cut outs for the servo plates need to be provided The picture below shows you the center of the servo mount location The cut outs need to be 43 mm x 43 mm Use Hysol or similar epoxy to glue the mount plate into the cut out Once the epoxy is dry you can fix the servo To connect the elevon with the serv...

Page 10: ...stallation of the EDF The following specifications are belonging to the use of the Schuebeler DS 30 DIA 3 ph EDFs On all air intakes the short and the long ones a 1 mm balsa layer needs to be glued at the reinforced end of the tubes by using good quality epoxy The direction of the fibres should be parallel to the axis of the tube Once the epoxy is dry add a thin layer of plywood to the balsa The p...

Page 11: ...e prepared all air intakes as described you can go ahead assembling the tubes and the EDFs as demonstrated on the following pictures The tubes will be affixed on the EDF by using adhesive tape that is wrapped around the EDF and the pipe coupling Page 12 of 20 EDF version 1 0 ...

Page 12: ...ould not be difficult to implement them Adjust the inner diameter of the structure frames if necessary The tubes should be overlapping in the front of the gondolas It is important that the EDF units are mounted aligned in the gondolas It should neither show angular distortion nor side trust Now the intake rings should be affixed with Hysol or similar epoxy on the edge of the tubes and the front of...

Page 13: ...DF Version from JetCom At the outlet the tubes can be fixed with a 1 mm balsa layer If necessary add a plywood layer in addition After fixing the tubes in the gondolas like this glue it with Hysol or equivalent Page 14 of 20 EDF version 1 0 ...

Page 14: ...Version from JetCom Installation of the battery The battery must be placed in the center of gravity see page 19 of the manual Ensure that they are not able to move during the flight e g by fixing them with Velcro Page 15 of 20 EDF version 1 0 ...

Page 15: ... for the installation of the interior equipment It is always a matter of individual preference on where to install the various electronic components receiver battery and so on The pictures below show the installation we have used for our model Page 16 of 20 EDF version 1 0 ...

Page 16: ... construction manual SR 71 Blackbird EDF Version from JetCom Page 17 of 20 EDF version 1 0 ...

Page 17: ... construction manual SR 71 Blackbird EDF Version from JetCom Page 18 of 20 EDF version 1 0 ...

Page 18: ... construction manual SR 71 Blackbird EDF Version from JetCom Page 19 of 20 EDF version 1 0 ...

Page 19: ...okit retract small 3 kg or EJF 3 gear air retract set low profile Main gear WaBo struts SR 71 nose gear Eurokit CAR 15082 000 INTAIRCO wheels and brakes No IAC 1000 diameter 57 mm main and nose wheels EDF 2x Schübeler DS 30 Dia 3 ph Motor 2x Hacker B40 13S Controller 2x Hacker MASTER 40 O flight Servos HS 5125 MG or HS 125 MG Elevon and Rudder 2 x Mini servos only if mechanically retract valve and...

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