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EG recommends an initial CG setting of 7.0 – 8.0 inches behind the 

 

BALANCING and PRE-FLIGHT: 

1.  Most state of the art aerobatic aircraft allow for a wide margin for balancing depending on what level 
of precision or freestyle the pilot prefers.  To perform properly without being too pitch sensitive, you must 
not go too aft on the CG.  

leading edge of the wing at the root.

  More experienced pilots may want to set the CG further aft for 

more 3D capability.  Varying weights of engines and radio gear will dictate how you should install each.  
The batteries can easily be located pretty much anywhere in the fuselage.  For those using a 100cc engine, 
servo cutouts are provided in the rear of the fuselage for the rudder servos.  These options should allow 
you to balance the model without adding any weight. 

Note:

  The best way to check your balance is to trim for level flight at about 1/2 to 3/4 throttle and then 

roll inverted.  The aircraft should maintain level flight with very little to no down elevator input.  If the 
aircraft climbs when inverted then you’ve probably got your CG too far aft.  If the nose drops more than 
slightly, then you are most likely nose heavy.   

 

Recommended control surface deflections:

 

  

Low Rate  High Rate 

Elevator 

15 degrees 45-50 degrees 

Rudder 

25 degrees 40 - 45 degrees 

Ailerons 

25 degrees 35-40 degrees 

 

 

 

FINAL ASSEMBLY AND PRE-FLIGHT INSPECTIONS: 

 

1.  Before arriving at your flying field, be sure all your batteries are properly charged and all radio 
systems are in proper working order.  

2.  Install the wings onto the fuselage being careful to align the wing tube with the wings and not force it.  
The wing tube may be initially tight but will loosen some with use.  Guide your servo wires into the 
fuselage openings and connect to the proper aileron channels.  Servo clips are recommended.  Once you 
have the wings fully seated in the fuselage tighten the wing bolts inside the fuselage.   

3.  Fill your fuel tank making sure your vent line is not plugged or capped.  With the canopy off, this is a 
good time to check for any fuel leaks.   

4.  Position the canopy in place and tighten the canopy screws.  Be sure to use the supplied rubber 
washers under the screw heads.   

5.  If you have removed your horizontal stabilizers, intall them once again and check all bolts and 
connections. 

6.  Check all control surfaces for secure hinges by performed a slight tug on the control surfaces and 
observing if there is any give in the hinges.  Check all control rods, ball links, servo screws, etc. for 
proper operation and installation.   

7.  Check your batteries and perform a proper range check once again with the engine off and running.  Be 
sure all surfaces are moving in the correct direction and the proper amount for your flying setup. 

8.  You are now ready for your maiden flight!  Good luck and enjoy your new aircraft!  If you have any 
comments or questions about this manual or the aircraft please email “

”. 

Содержание Extra 300 Mid-Wing

Страница 1: ...to fly R C model This ARF adopts the latest 3D design features and emphasizes high performance light weight and fun The plane is designed by professional engineers and built by skilled craftsmen Many...

Страница 2: ...aft com E mail mfg egaircraft com Specifications Wing Span 102 inches Length 95 inches including spinner Wing Area 1934 sq in Flying Weight 23 to 27 lbs Engine 85cc to 100cc Gas Radio 6 to 9 Channels...

Страница 3: ...ild your model carefully and correctly If you are not an experienced flier have your work checked and ask for help in learning to fly safely This model aircraft is not a toy and must be operated and f...

Страница 4: ...ailerons and elevators One or two high quality rudder servos totaling at least 330 in oz or better Appropriate servo arms for the above recommends two 36 two 18 three 12 two Y harnesses two 6 two 6 ex...

Страница 5: ...coating of epoxy to prevent engine oil from soaking in This is especially important around the engine compartment and servo openings with exposed areas 4 Some modelers prefer to seal the hinge gaps us...

Страница 6: ...ide of the hinge points Install this end into the holes of the rudder and make sure each hinge is properly aligned at exactly 90 degrees to the hinge line 6 Now coat the other end of the hinge points...

Страница 7: ...06...

Страница 8: ...e using 4 small wood screws as shown in the pictures below 4 Install the main wheel axles to the composite landing gear and tighten the nylon insert lock nut Install one wheel collar onto the axle Use...

Страница 9: ...08 5 Fit the wheel pant in place and install using the two supplied screws Use thread lock to secure the screws in place Repeat the above steps for the other main gear...

Страница 10: ...09...

Страница 11: ...your servo arms relative to each other and the rudder horn is critical for proper rudder operation without binding or excess cable slack 3 If you are using two rudder servos you will need to set up t...

Страница 12: ...ks about half way onto one of the threaded couplers Feed the loose end of one of the cables through a brass tube and then through the threaded coupler Holding the rudder centered adjust the cable leng...

Страница 13: ...the engine center line is offset to the left to compensate for the right thrust built into the engine box 2 Place the cowling in place on the fuselage and measure the distance from the firewall to abo...

Страница 14: ...nnections neatly and firmly 5 Assemble the throttle servo mount using the supplied laser cut parts This mount can be used if you are using an engine with a rear carb such as the 85 cc engines The typi...

Страница 15: ...and a fill line to a fuel port which can be mounted on the fuselage side opposite your ignition switch Make sure your vent line does not come close to any hot exhaust part the lines to the tank 7 Ther...

Страница 16: ...g the supplies screws and rubber washers 2 Install the propeller and spinner Large gasoline engines are very powerful and can cause damage to persons or property if propellers and spinners are not ins...

Страница 17: ...provided in the fuselage to guide the wires 5 Slide the stabilizer carbon fiber tube into the fuselage and install both stabs onto the tube Connect the servo wires and secure the connections with eith...

Страница 18: ...xperienced modeler or have them double check your work 5 This manual will describe the use of two separate transmitter channels for each aileron servo Other options include programmable servos or matc...

Страница 19: ...mount your switches just below the canopy Mount your switches according to the manufacturer s instructions and route your wires safely and securely as above 4 Your receiver battery s can be mounted i...

Страница 20: ...EMBLY AND PRE FLIGHT INSPECTIONS 1 Before arriving at your flying field be sure all your batteries are properly charged and all radio systems are in proper working order 2 Install the wings onto the f...

Страница 21: ...2 0...

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