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FUSELAGE DECISIONS, Continued... 




Landing Gear Mount -

 

The aluminum landing gear is designed to simply bolt to the bottom of the fuselage.  

That's fine, but I got fancy and inset the mount 3/8" so the bottom of the gear would be flush with the bottom of the 
fuselage.  It's a little extra work and you lose a bit of prop clearance, but it looks good to my eye.  You also need to 
decide on mounting hardware.  I bolted my gear in place using six 10-32 x 1" button-head socket screws threaded 

into blind nuts.  

Note:

  Mounting hardware and axle bolts are included with the optional Main Wheel Package. 

 



Wheels and Axles -

 

Du-Bro 6" wheels will probably work okay, but I sure like the looks of the Sullivan 7" wheels 

on the prototype.  The axle holes in the aluminum gear are 5/16".  I used hardened-steel 5/16"-18 x 2-1/2" socket-
head cap screw for axles.  The nice part about these axles is that the wheels actually ride on the smooth part of the 

shank, and the socket head fits neatly into a recess in the wheel.  Simple and strong.  I've had a tendency to design 
landing gear a little light in the past - this one's not going to have that problem! 
 



Tailwheel -

 

There are several good tailwheel assemblies on the market.  My prototype uses a Sig extra-large 

tailwheel  assembly  with  a  1-3/4"  Du-Bro  tailwheel.    The  Graph  Tech  #304  assembly  is  a  high-quality  alternative 
(available from BTE).  If you choose something else, be sure it's rated for at least a 35 lb. model. 
 



Tailwheel and Rudder Cables -

 

I used Du-Bro 4-40 pull-pull cables on both the rudder and the tailwheel.  Both 

sets of cables are attached to a Sig tiller bar, which in turn is driven by a single servo.  Give some thought to the 
routing of any cables, including the installation of guide tubes. 
 



Servo Positioning -

 

Lots of room to play with!  My elevator servos are in the rear fuselage, under the stabilizer, 

to keep the pushrods short and stiff.  I used Hitec 700BB servos on all of the control surfaces.  These are big and 
heavy, but they have a lot of torque (133 oz.-in. @ 4.8V, 161 oz.-in. @ 6.0V) and they are inexpensive.  You will need 
a  variety  of  servo  extension  wires,  Y-harnesses,  and  possibly  servo  reversers.    I've  had  real  good  luck  with  the 
products from Electrodynamics; they use heavy-gauge wire on all their extensions.  They also offer connectors in 

different colors, which is great for color-coding those aileron and flap leads with the connectors from the receiver. 

Electrodynamics, 31091 Schoolcraft, Livonia, MI 48150.  Phone: 734-422-5420.  www.electrodynam.com

 

 



Radio System -

 

This is a catch-all category, but you need to think about things like where you want to mount 

your switch or switches, how many batteries you're going to install, and how to route your antenna.  Actually, much of 
this can wait until the model is framed up, because you might want to position your battery (or batteries) to help with 
balance.   After  reading  several  articles on  large  model  radio  installations, I  decided  to go  with  two  receivers,  two 
batteries,  and  two  switches.    The  batteries  are  each  4-cell,  1400mAh  and  the  switches  are  Super  Switches  from 

Cermark (they have a built-in charge jack).  The dual Hitec Supreme receivers aren't so much for redundancy, but 
more to split up the servo load.  The left receiver controls the left-hand aileron, flap, and elevator, while the right 
receiver runs the right-hand aileron, flap, and elevator.  My throttle servo is on the left receiver, rudder on the right.  
At the very least, I recommend using dual batteries and switches for redundancy.  If you go with one receiver, you 

should probably use a servo isolator, like the Pow'R Bus Pro from Electrodynamics. 

 



Color Scheme -

 

Think about it now because if you plan to use a plastic film covering, you may want to add 

support sticks where the colors meet and overlap.  Also consider that you will probably want to paint the inside of the 

cabin area to match your trim scheme.  It took nearly ten rolls of Monokote to cover the BTE prototype. 
 



Structural Modifications and Additions -

 

The Super Flyin' King is a natural for hauling cargo, dropping candy, 

or towing gliders.  Maybe you're thinking about adding floats later.  Plan ahead for these things and install hard points 

or whatever equipment you may need during construction.                                                                                     

-SFK 

PAGE 15 

Summary of Contents for SUPER FLYIN' KING

Page 1: ...hes Wing Area 3380 square inches Length 96 inches Weight 36 pounds approximate Engine Range 60cc 80cc Gas Manufactured by BRUCE THARPE ENGINEERING 8622 E EVANS CREEK ROAD ROGUE RIVER OR 97537 phone 54...

Page 2: ...TABLE OF CONTENTS 0 1 2 0 3 4 5 4 4 2 22 0 2 0 0 0 6 0 7 1 0 2 2 8 9 6 7 5 2 1...

Page 3: ...is 2 move the web all along the rib to be sure it is straight along its entire length front to back Left Outer Wing Panel with all spars sub LE and servo lead tube in place Shear webs have yet to be...

Page 4: ...tick to hold the ends of the W 1 ribs but found out later it would have been smarter to use a sheet of 3 32 balsa maybe one or two inches wide Use only a few spots of glue so it can be removed later A...

Page 5: ...r webs for the C channels front and rear No glue yet You might have to use tape to hold the rear web in place against the rear spars Now position your joiner assemblies on the webs I positioned my set...

Page 6: ...er Three 6 32 x 3 4 Socket Head Bolts Six 6 Washers and Three 6 32 Hex Nuts Notice I used a washer under the bolt heads to keep the bolts from digging into the aluminum Now the webs are ready to be gl...

Page 7: ...ace of the wing Mark the sheeting as you go so you ll remember their uses later on Aileron sheeting Select another six sheets and slice four of them in half along their full length These eight 1 1 2 x...

Page 8: ...t to add extra wood for trimming curved corners later Center TE Sheeting no diagram This is to sheet the small wing section between the flaps in the center wing panel The final piece for the top shoul...

Page 9: ...he sub LE to match the airfoil contour in preparation for the leading edge sheeting Glue the top LE sheeting in place Again notice the sheeting should cover only half the width 3 8 of the main wing sp...

Page 10: ...build a flat wing panel once the remaining sheeting is glued in place your wing panel will be locked into its final state In case you re wondering the SFK doesn t have or need washout Try for zero wa...

Page 11: ...I had to sand nearly a full ply off to make the plate match the thickness of the balsa sheeting Check yours before gluing and take steps to be sure it will be flush with the trailing edge sheeting to...

Page 12: ...x 4 1 2 x 10 1 8 When dry flip the wing over upside down and pin it down this time with the top spar against the table Support the TE with a stick then take a long careful look at the panel from all...

Page 13: ...beveled to match the slope of the ribs Remember to make right and left ailerons and flaps Aileron Upside Down After sanding the front face of the aileron I decided that my hinges would need more mater...

Page 14: ...Drill 3 8 holes for the tail brace hard points as shown on the plans Add the dowels and the lite ply reinforcements When dry use your big sanding block to sand both sides of the stabilizer flat The el...

Page 15: ...the model s centerline so that the prop shaft ends up centered at the front of the model Cowling and Spinner This is where builders will need to do their greatest amount of innovating because of all t...

Page 16: ...n 6 0V and they are inexpensive You will need a variety of servo extension wires Y harnesses and possibly servo reversers I ve had real good luck with the products from Electrodynamics they use heavy...

Page 17: ...nition wire Carb Box as recommended by Cactus Aviation Only bottom of carb box is attached to F 1 the top and sides are removable Bottom of box has large hole for air intake Bellcrank is linked to cho...

Page 18: ...sets the tailwheel mount and the diagonal sticks on the bottom of the fuselage This picture is a little out of order because some upcoming steps are already done here The plywood plate in front of F 3...

Page 19: ...recess it into the fuselage as shown here If not the length of the rear mount will have to be trimmed The half moon cut at the front of the bottom sheet is optional it s purely for looks The big hole...

Page 20: ...o support false floors which of course I ve yet to finish Fuselage Top showing the cabin rear and laminated wing blocks glued in place Cabin Rear Wing Block Support Fuselage Top showing the position o...

Page 21: ...sheeting extends rearward slightly to overlap the front of the stabilizer Also notice that I added some balsa triangle stock to reinforce the tailwheel mount Above Hatch removed The hatch is held down...

Page 22: ...0 1 2 3 4 1 5 6 7 PHOTO 1 PHOTO 2 PHOTO 3 PHOTO 4...

Page 23: ...0 1 2 3 PHOTO 1 PHOTO 2 PHOTO 3 PHOTO 4...

Page 24: ...4 5 4 6 4 0 7 0 8 0 0 9 4 1 PHOTO 5 PHOTO 6 PHOTO 7 PHOTO 8 PHOTO 9...

Page 25: ...1 0 1 9 5 9 7 6 A PHOTO 10 PHOTO 11 PHOTO 12...

Page 26: ...ut there may be times in the future when nobody is available Of course some would argue that flying alone is unsafe too but I ll leave that up to you The eyelet is bolted to a 1 4 plywood plate and is...

Page 27: ...LERONS 1 5 8 UP 1 DOWN ELEVATOR 1 UP 1 DOWN RUDDER 1 1 2 LEFT 1 1 2 RIGHT RUDDER DEFLECTION WITH FULL AILERON 3 4 FLAP DEFLECTION FULL MOVEMENT 40 DOWN ELEVATOR WITH FULL FLAPS 7 16 0 1 2 3 0 0 4 5 6...

Page 28: ...0 12 3 4 5 6 7 6 8 3 9 7 9...

Page 29: ...ough call It might be okay without them but I didn t want to find out the hard way that I was wrong I added wires to mine which have held up well but there are sturdier and more expensive alternatives...

Page 30: ...ALL BALSA PARTS BAG 4 1 4 4 6 4 5 0 9 3 0 7 9 3 0 1 3 0 3 0 SMALL PLY HARDWOOD PARTS BAG 3 0 8 8 1 4 4 LITE PLY PARTS 3 8 7 1 2 4 3 2 4 9 2 3 9 2 4 9 2 1 2 5 9 1 2 4 2 9 2 2 6 2 2 4 9 2 0 2 6 5 2 0 2...

Page 31: ......

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