Bengtson Company FOKKER EIII Instructions Manual Download Page 21

Fokker

 

EIII

   

Page

 

 

20

 
 

 

Copyright©

 

2007

  

M.K.

 

Bengtson

  

All

 

Rights

 

Reserved

   

Rev

 

07/11

  

 

 

 

 

Next

 

step

 

is

 

to

 

setup

 

and

 

install

 

the

 

elevator

 

supports

 

and

 

add

 

the

 

rudder

 

support

 

tube

 

and

 

the

 

tailskid.

 

 

The

 

next

 

thing

 

is

 

to

 

attach

 

the

 

brass

 

tube

 

at

 

the

 

rear

 

of

 

the

 

fuselage

 

that

 

serves

 

as

 

the

 

elevator

 

pivot

 

tube

 

and

 

rudder

 

pivot

 

tube

 

mount.

 

The

 

design

 

follows

 

the

 

more

 

standard

 

EIII

 

setup

 

in

 

that

 

the

 

elevator

 

horns

 

are

 

located

 

close

 

in

 

to

 

the

 

center

 

of

 

the

 

pivot

 

tube

 

where

 

the

 

EIII

 

I

 

am

 

using

 

as

 

a

 

model

 

(it

 

is

 

a

 

reproduction)

 

differs

 

in

 

that

 

the

 

horns

 

are

 

part

 

of

 

each

 

elevator.

 

I

 

have

 

looked

 

at

 

a

 

bunch

 

of

 

pictures

 

of

 

EIII

ʹ

s

 

and

 

this

 

is

 

the

 

only

 

one

 

I

 

have

 

seen

 

like

 

this.

 

 

In

 

any

 

case,

 

the

 

original

 

setup

 

calls

 

for

 

the

 

two

 

elevator

 

halves

 

to

 

be

 

glued

 

to

 

a

 

piece

 

of

 

3/16

ʺ 

brass

 

tube

 

(after

 

making

 

sure

 

they

 

are

 

flat

 

and

 

level

 

to

 

each

 

other).

 

The

 

elevator

 

horns

 

are

 

epoxied

 

to

 

the

 

tube

 

at

 

their

 

appropriate

 

location.

 

Prior

 

to

 

all

 

this

 

the

 

three

 

sections

 

of

 

elevator

 

pivot

 

support

 

tube

 

(7/32

ʺ 

brass

 

tube)

 

are

 

placed

 

on

 

the

 

3/16

ʺ 

brass

 

tube,

 

the

 

large

 

one

 

between

 

the

 

elevator

 

horns

 

and

 

the

 

two

 

smaller

 

ones

 

outboard

 

of

 

the

 

horns.

 

You

 

then

 

attach

 

the

 

wings

 

and

 

place

 

the

 

main

 

support

 

pivot

 

tube

 

against

 

the

 

rear

 

of

 

the

 

fuselage,

 

line

 

it

 

up

 

in

 

relation

 

to

 

the

 

wings

 

and

 

tack

 

glue

 

in

 

place.

 

There

 

are

 

several

 

holes

 

in

 

the

 

rear

 

top

 

and

 

bottom

 

fuselage

 

pieces

 

that

 

you

 

run

 

Kevlar

 

thread

 

thru

 

to

 

lace

 

the

 

whole

 

shebang

 

together.

 

Where

 

satisfied,

 

and

 

all

 

the

 

angles

 

and

 

dangles

 

are

 

checked,

 

the

 

three

 

pieces

 

of

 

brass

 

support

 

pivot

 

tube

 

are

 

epoxied

 

in

 

place.

 

 

 

 

Since

 

the

 

plane

 

I

 

am

 

modeling

 

has

 

the

 

horns

 

on

 

the

 

elevators,

 

one

 

could

 

use

 

a

 

single

 

piece

 

of

 

tubing

 

for

 

the

 

support.

 

I

 

instead

 

decided

 

to

 

make

 

my

 

elevators

 

removable.

 

During

 

construction

 

of

 

the

 

elevator

 

halves

 

I

 

glued

 

in

 

a

 

piece

 

of

 

3/16

ʺ 

brass

 

tube

 

which

 

will

 

have

 

a

 

section

 

of

 

5/32

ʺ 

brass

 

tube

 

inserted

 

in

 

it

 

to

 

act

 

as

 

the

 

pivot.

 

It

 

will

 

extend

 

out

 

of

 

the

 

elevator

 

half

 

and

 

go

 

through

 

the

 

short

 

section

 

of

 

support

 

pivot

 

tube

 

on

 

the

 

outside

 

edge

 

of

 

the

 

read

 

fuselage

 

and

 

extend

 

half

 

way

 

into

 

the

 

large

 

pivot

 

support

 

tube

 

(these

 

three

 

pieces

 

are

 

3/16

ʺ 

brass

 

tube).

 

The

 

larger

 

piece

 

is

 

centered

 

on

 

the

 

rear

 

of

 

the

 

fuselage

 

and

 

the

 

two

 

smaller

 

pieces

 

are

 

separated

 

from

 

the

 

end

 

of

 

the

 

main

 

piece

 

by

 

the

 

thickness

 

of

 

a

 

5/32

ʺ 

wheel

 

collar.

 

The

 

elevator

 

Summary of Contents for FOKKER EIII

Page 1: ...served Rev 07 11 Fokker EIII or Fokker EIII EZ 1 6 Scale R C Scale Model Instructions CONTACT INFORMATION Designed by M K Bengtson Prototype by Brian Allen Manufactured and Distributed by Bengtson Com...

Page 2: ...are made up of a laser cut piece of 3 16 balsa and a 1 32 ply doubler for the front and a stick built aft end from 3 16 square balsa The first thing to do is to glue the doublers to the balsa sides ma...

Page 3: ...esting puzzle of parts I would recommend studying the plans carefully as it takes a bit of pondering to get the whole thing figured out It consists on a main gear of 1 8 music wire and a number of sup...

Page 4: ...previously as a spacer The landing gear will then be epoxied in place and the 1 8 lite ply cap added and the whole shebang is then glued into the fuselage It has to be done in this order since once th...

Page 5: ...inside to reinforce this area Note that I have glued the block in backwards the wide piece on the bottom should be facing the rear not the front This is not a real problem as I will just have to read...

Page 6: ...d at the plans and saw that the second one gets installed on the top of the fuselage Always pays to look closely at the plans I have thus glued the second F4 in place on the top of the fuselage The ba...

Page 7: ...from two pieces of laser cut 3 16 balsa that have a long scarf joint that require gluing I pinned a long metal straightedge to the board to keep it from moving and then pinned the trailing edge piece...

Page 8: ...o find any 3 8 carbon tube that did not cost and arm and a leg At 75 each the hardwood dowels are a buy The dowel fits into a laser cut round notch on the front of each rib and it is glued in place Ri...

Page 9: ...then sanded round on its edge and the last wing rib and the leading edge dowel are sanded and blended into the wing panel The wing panels are held against the fuselage side by two 8 32 bolts and acco...

Page 10: ...y epoxied in place When dry the panels are then slid into the tubes and the retaining screws draw everything up tight and snug I have not yet epoxied the tubes in place I will leave them loose until I...

Page 11: ...main gear wire by about 1 8 at its point apex I clamped a piece of 1 8 thick spruce to the main gear wire using clothespins and then clamped the wire L2 to the spruce Let dry thoroughly and when dry...

Page 12: ...solder joints are filed and cleaned up as needed RUDDER I decided to build up the rudder It consists of a number of 3 16 thick laser cut balsa parts that you assemble over the plans with a drop or two...

Page 13: ...ll six pieces of laser cut 3 16 balsa for the front of the cowl to allow proper shaping and three spacers that are made up from three pieces each of 1 4 sq balsa The cowl is covered with two pieces of...

Page 14: ...g edge and glued in a piece of 1 16 x 3 8 balsa flush with the rib bottom This will form part of the hatch hold down and also give the covering something to grab on to I then placed the hatch cover in...

Page 15: ...es The design calls for carving these out of some blue or pink foam As I am a bit concerned about the short nose and long tail on the EIII and just about every other WWI aircraft I decided to make my...

Page 16: ...r bolts to the front ply rings and the whole shebang gets bolted the airplanes firewall The dummy cylinders are constructed of a couple of laser cut balsa disks with some card stock wrapped around the...

Page 17: ...outrunner in the crankcase you will need to carve a relief passage in the crankcase to allow the motor wires to pass freely back to the rear of the mount without rubbing against the rotating can This...

Page 18: ...nets I then glued the magnets in place making sure they were properly orientated The front hold down is simply a piece of 1 8 square spruce glued to the front of the hatch and then a piece of 1 32 ply...

Page 19: ...As before I added some 1 16 balsa guide tube supports installed the guide tubes and added the internal fuselage guide tube supports as outlined for the rudder Major difference here is that the rudder...

Page 20: ...glued and wrapped to the horizontal stabilizer support tube I have not yet made these pieces up I have covered the elevators and rudder with some Polyspan and will probably clear dope them and paint...

Page 21: ...tween the elevator horns and the two smaller ones outboard of the horns You then attach the wings and place the main support pivot tube against the rear of the fuselage line it up in relation to the w...

Page 22: ...lace the tube to the end of the fuselage As the thread was yellow I dug out some gray acrylic craft paint and dabbed some on the thread I then used a small curved end syringe to apply 30 minute epoxy...

Page 23: ...the Scotch Brite pad to it with a drop of CA I made up a small test section of Chrome Ultracote ironed on to a scrap of wood and went to town Came out well so I started on the EIII Took about 30 minut...

Page 24: ...acing wires everywhere Four on each panel surface 4 top and 4 bottom and the fuselage brace pylon has four that connect to the fuselage top decking Lets not even start talking about all the wires in t...

Page 25: ...d checked for alignment Due to a slight twist I have in my fuselage I had to fiddle with the slot a bit to get the tailskid lined up properly When satisfied the rudder pivot tube is cut to length from...

Page 26: ...couple of turns on the couplers to tension them properly so I do this and spin the locknuts up against the end of the clevis to lock everything in place The servos used are as follows The center serv...

Page 27: ...bead aisle at the local Michaels craft store along with a package of some nice small crimp ferrules These worked out well There are four wires one from the top corner of each leg and they meet at the...

Page 28: ...ends together for an instant bond The best way to align the ends is to glue them while they are in place on the wheel Then attach the tires to the wheels and CA in place A thin bead of CA around the r...

Page 29: ...I need to reduce the elevator throw and mix in some exponential to calm things down Other than that it looked very nice in the air It was getting bumped around quite a bit by the breeze so I would ca...

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