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Extreme Flight 78" EXTRA 300 ARF, Instruction Manual

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Extreme Flight 78

 

21. While the Extra is still upside down let’s install the rudder and

 

finish up the tailwheel 

installation as well as opening the exit hole for the incoming air that cools the batteries. 
Apply 30 minute epoxy to the

 

holes in the rudder post and to the rudder hinges. As you 

position

 

the rudder onto the vertical fin, be sure the tailwheel tiller arm is

 

inserted into the 

ball link. Push the rudder into position and wipe away any excess epoxy with a paper 
towel and denatured alcohol.  Use a #11 blade to remove the covering from the panel in 
the bottom of the fuselage as shown in the following picture.  Seal the edges of the covering 
to the airframe with a sealing iron. 

 

 

 

20

Summary of Contents for 78" EXTRA 300 ARF

Page 1: ...78 EXTRA 300 ARF Instruction Manual Copyright 2009 Extreme Flight RC ...

Page 2: ...ronautics in order to be properly insured and to operate your model at AMA sanctioned flying fields only If you are not willing to accept ALL liability for the use of this product please return it to the place of purchase immediately Extreme Flight RC Ltd guarantees this kit to be free of defects in materials and workmanship for a period of 30 DAYS from the date of purchase All warranty claims mus...

Page 3: ...material and into the ding in the wood Apply heat to the area with a sealing iron and the imperfection will disappear Deeper marks may require that this process be repeated a couple of times to achieve the desired result but you will be surprised at how well this technique works 4 DO NOT SKIMP ON SERVOS Your aircraft is equipped with very large control surfaces that deflect over 45 degrees A lot o...

Page 4: ...s carbon fiber structural reinforcement carbon fiber wing and stab mounting tubes aluminum landing gear titanium pushrods and a carbon fiber tail wheel assembly all ensuring the lightest most high performance aircraft possible You will notice there is a box built into the bottom of the glow gas version of the Extra s fuselage This is a pipe tunnel and will accommodate most canister mufflers and tu...

Page 5: ...ectric version uses a spring loaded dual hatch latch configuration When the bolts used to retain the canopy hatch and cowl are tightened against the bonded sealing washer the rubber on the washer compresses preventing the bolt from backing out The rubber on the washer also protects the surface of the cowl Tighten the bolts until the rubber compresses but do not allow the metal part of the washer t...

Page 6: ... in the covering over the 2 slots for the elevator control horns on the bottom of the elevator surface Double check to make sure you are cutting into the bottom of the elevator 2 Insert the 2 control horns into the base plate and trial fit the horns into the slot and make sure they seat properly against the base and elevator surface Trace around the base plate with a felt tipped marker 6 ...

Page 7: ...Scuff the portion of the horns that will be inserted into the elevator with sandpaper Apply 30 minute epoxy to the slots and thoroughly coat the horns and base plate bottom Reinsert the assembly into the elevator and wipe away any excess epoxy with a paper towel and denatured alcohol Place a 3mm bolt through the horns to help insure proper alignment and set aside to dry Repeat for the other elevat...

Page 8: ...8 ...

Page 9: ...9 ...

Page 10: ... drying piece so that any excess epoxy will pool around the rear of the hinge When you are comfortable with this process you should be able to do one side of a surface per batch of epoxy Glue all hinges into the stabilizer first After the glue has set trial fit the elevator to the stab and adjust if necessary There should be as little gap as possible between the stab and elevator When satisfied wi...

Page 11: ...uch detail as in the previous procedure Remove the aileron from the wing panel Locate the 2 slots for the control horns and remove the covering from the slots with a sharp 11 blade Follow the same procedure as outlined previously to install the control horns into the control surface and hinge the wing Repeat this procedure for the other wing 11 ...

Page 12: ...r heat shrink tubing Use the manufacturer supplied mounting hardware and install the servo with the output shaft toward the trailing edge of the wing Electronically center your servo Aileron servo arm length should be 1 50 We use and recommend the SWB double lock aluminum arms Thread 2 ball links onto the titanium turnbuckle pushrod Secure the pushrod to the control horns and servo arm as shown in...

Page 13: ... of the wing If there are wrinkles in the covering on the leading edge sheeting use a heat gun with a 100 cotton t shirt to remove them and prevent digging into the wood with an iron Use caution and avoid excessive heat as you may cause the Ultracote to shrink too much and lift at the seams Also take the time to seal the hinge gaps with Ultracote or Blenderm tape Clean the wings with Windex and pu...

Page 14: ...g from the area where the base plates will go as done previously with the aileron and elevator Mix up some 30 minute epoxy and use a small blade to fill the 2 slots with epoxy Use plenty of epoxy and be sure to completely fill the two slots Use an epoxy brush to completely cover the areas on the rudder horns and base plate that will glue into the rudder Slide the rudder horns back into their prope...

Page 15: ...e ball link and the hole in the bottom of the rudder Push the ball link into the hole as shown in the picture Use a little excess epoxy to form a fillet around the bottom of the ball link Make sure the hole in the brass ball is aligned front to rear to accept the tailwheel tiller arm Go ahead and glue the hinges into the rudder at this time using the procedure outlined previously 15 13 While this ...

Page 16: ...e of pieces of masking tape while you drill 2 holes with a 1 16 drill bit Apply a few drops of thin CA to the holes and allow to dry then secure the assembly to the bottom of the fuselage as shown with the 2 provided coarse thread wood screws and 2 washers Fuselage Assembly 16 We ll begin by installing the landing gear Locate the aluminum main landing gear 4 3mm bolts lock nuts and washers Insert ...

Page 17: ...ck neoprene tubing Use a sharp hobby blade and cut through one wall of the tubing horizontally along the length of the tubing Press the tubing onto the edges of the fairing as shown and secure with thin CA Make sure the seam is on the rear side of the fairing 17 ...

Page 18: ...k into place and apply masking tape to keep it in position while the glue dries 18 20 Locate the 2 axles 2 locking nuts 2 wheels 2 wheel collars and 2 wheel pants from the hardware package Place the wheel onto the axle and secure with a wheel collar Place the threaded portion of the axle through the hole in the landing gear and screw the lock nut onto the axle but do not tighten completely There i...

Page 19: ...e wheel pants drill a 1 16 hole though the plywood plate that is glued inside the pant at the location of the hole in the landing gear Secure the pant in position with a single wood screw Repeat this process for the remaining wheel pant 19 ...

Page 20: ...r post and to the rudder hinges As you position the rudder onto the vertical fin be sure the tailwheel tiller arm is inserted into the ball link Push the rudder into position and wipe away any excess epoxy with a paper towel and denatured alcohol Use a 11 blade to remove the covering from the panel in the bottom of the fuselage as shown in the following picture Seal the edges of the covering to th...

Page 21: ...designated location and bolt the motor mount assembly in place If using a different motor or mount use the marks on the firewall to determine proper motor position Be sure to use the offset line to the right of the vertical center line to accommodate for the motor offset due to the built in right thrust angle in the motor box Distance from the front face of the motor box to the motor drive washer ...

Page 22: ...at results this servo has recently been updated and re released as the Hitec 7985 We are using the SWB 3 5 offset rudder arm We highly recommend the use of this quality product to ensure correct geometry 24 Next let s install the pull pull rudder cables Look into the rear of the fuselage and you will see a nylon tube installed on each side of the fuselage Use a pieces of wire or T pin to open the ...

Page 23: ...h stab elevator assemblies onto the carbon fiber mounting tube and secure with 2 3mm bolts inserted through a washer and the mounting tabs and into the corresponding blind nuts already installed in the fuselage Thread a ball link on each end of a titanium pushrod and secure to the servo arm and elevator control horns with a 3mm bolt and nylon insert locknut Again we recommend the SWB 1 5 inch serv...

Page 24: ... cowl place four strips of masking tape on the fuselage as shown and use a felt tipped marker to mark the location of the bolt holes in the cowl mounting tabs 24 28 Place the canopy hatch onto the fuselage to aid in alignment Peel the tape back just ...

Page 25: ...ed hatch latch mechanism The wings are retained by inserting the 1 4x20 nylon bolts through the holes in the fuselage just behind the wing tube and into the pre installed blind nuts in the root rib of the wing Be careful not to cross thread the bolts and inspect them periodically to insure thread integrity 31 Included in your Extra kit is a set of side force generators SFGs These aerodynamic devic...

Page 26: ... 5 from the leading edge of the wing measured at the root and extends back from this point CG is determined with the Extra in the upright position One of the best ways to dial in the proper CG for your aircraft is the 45 degree line test Fly the aircraft in front of you from left to right or right to left if you prefer at full throttle Pull the aircraft into a 45 degree up line and establish this ...

Page 27: ...e only way to set up the Extra Start here and then adjust to fit your own preferences and style of flying Elevator 8 10 degrees low rate 18 20 exponential all you can get high rate 60 65 exponential Aileron 20 degrees low rate 30 40 exponential all you can get high rate 65 70 exponential Rudder 20 degrees low rate 50 exponential all you can get for high rate 80 90 exponential Again this is just a ...

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