HobbyKing DragonFly EDF Assembly Manual Download Page 9

 

 

Step 9: Finishing touches, CG and throws 

Install  your  electronics  in  the  usual 
manner.  If  you  have  a  4  channel  radio 
you  will  need  to  install  2  servo  Y-
harnesses  to  combine  the  two  aileron 
servos  and  the  rudder  and  nose  wheel 
servos. 
 
The location for the CG is shown to the 
right.  Adjust  the  location  of  the  battery 
such  that  the  CG  lies  between  53  and 
58mm  behind  the  leading  edge  of  the 
main  wings,  as  measured  at  the 
fuselage. 
 
The control throws should be +/- 6mm for 
the ailerons and elevators and +/- 10mm 
for  the  rudder.  If  you  are  using  dual 
rates, add and subtract 1.5mm on these 
values  for  high  and  low  rates 
respectively. 

 
 
 
 
 
 

Important: 

!

 

Pre-flight adjustment and trimming must be done before flying. Check that all 
linkages, nuts, servo horns, linkage nuts and screws are tightened. 

!

 

Ensure the flying field is spacious and safe to fly. Bench test the electronic power 
system on load for 1 minute.  

!

 

Check all electronic equipment. Range-check the radio equipment. Test all control 
surface are moving in their assigned directions before each flight.  

!

 

Check the battery voltage before use, even the batteries are recently charged. 

!

 

After the first flight, it is prudent to check the CG for all subsequent flights.  

 

 

Summary of Contents for DragonFly EDF

Page 1: ...is required Specifications Meterial Plywood and film covered balsa Wingspan 920MM Length 830MM Flying weight 800 900g Motor 2830 3600kV Included EDF 68mm Included ESC 40A Required Servo 5x9g Required MG90S is recommended Battery 2200 mah 3S Required Radio system 4 channel Required ...

Page 2: ... and struts Pushrods x5 Long and short CF rod pins Additional hardware screws clevises horns etc Fiberglass fin Equipment required not included 4 channel radio and receiver 5x9g servos 30 50A ESC Battery 2200mah 3S1P is recommended Strong epoxy 15 30 min and strong CA glue Velcro 30cm servo extension wires x2 2mm drill bit Small screwdrivers and Allen hex keys Craft knife ...

Page 3: ...t away the covering film from the slot for the servo arm Attach the servo to the underside of the servo bay covers either by gluing the servo directly in place or by gluing small wooden blocks in the appropriate locations with CA glue and screwing the servo to these Do not forget to drill 1 5mm pilot holes into the wooden blocks before screwing into them Attach 30cm servo extension leads to the se...

Page 4: ...e right Secure the control horn to the rudder Next route the elevator pushrod through its plastic sleeve from the top of the vertical stab through to the fuselage Glue the horizontal stab in place as shown using 30 minute epoxy Allow to fully cure before continuing Note that this joint is keyed by design in order to maximize bond strength You will need to cut a small amount of covering film away f...

Page 5: ...ach servo and control surface trim the excess length off each pushrod Step 5 Main landing gear install The main landing gear struts are glued screwed directly to the underside of the main wings Locate the reinforced area in which these sit and cut a small grove in the plywood into which the strut will sit using a craft knife Drill a 3mm hole at the end of the grove closest to the fuselage at 10mm ...

Page 6: ...e landing gear strut in position Secure with the included control arm and hex screw Attach a pushrod and metal clevis Install the nose landing gear servo in the provided servo mount Make sure to mount the servo as far away from the centerline of the fuselage as possible to avoid the pushrod interfering with the battery pack ...

Page 7: ... in the wall of the EDF housing to accomplish this Once you have fed the three motor wires through this hole solder a male bullet onto each Secure the EDF unit to the fuselage using four short wood screws For added efficiency add the EDF inlet shroud should be glued in place using a few drops of CA glue Next attach the plywood motor mounts using strong CA glue or epoxy as shown Remove a portion of...

Page 8: ... the covering film from the fuselage in the following locations Slide the large CF rod into one of the main wings and slide that wing in place onto the fuselage Slide on the other main wing and secure one to the other using the rubber o ring as shown You may need to adjust the eyelets to achieve the correct tension in the rubber band Locator pin Eyehook ...

Page 9: ...nd 10mm for the rudder If you are using dual rates add and subtract 1 5mm on these values for high and low rates respectively Important Pre flight adjustment and trimming must be done before flying Check that all linkages nuts servo horns linkage nuts and screws are tightened Ensure the flying field is spacious and safe to fly Bench test the electronic power system on load for 1 minute Check all e...

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