Bengtson Company FOKKER EIII Instructions Manual Download Page 23

Fokker

 

EIII

   

Page

 

 

22

 
 

 

Copyright©

 

2007

  

M.K.

 

Bengtson

  

All

 

Rights

 

Reserved

   

Rev

 

07/11

  

 

 

The

 

front

 

end

 

of

 

the

 

EIII

 

is

 

covered

 

with

 

aluminum

 

sheet

 

(cockpit

 

forward

 

and

 

cowl).

 

To

 

replicate

 

this

 

I

 

covered

 

these

 

sections

 

with

 

some

 

chrome

 

Ultracoat.

 

It

 

went

 

on

 

well

 

but

 

I

 

learned

 

that

 

when

 

covering

 

solid

 

surfaces

 

with

 

this

 

material

 

you

 

have

 

to

 

be

 

very

 

careful

 

with

 

the

 

temperature.

 

If

 

it

 

gets

 

to

 

hot

 

it

 

seems

 

to

 

dull

 

very

 

quickly.

 

So

 

a

 

bit

 

of

 

experimenting

 

found

 

a

 

good

 

temp.

 

The

 

fuselage

 

sections

 

were

 

covered

 

in

 

individual

 

pieces

 

to

 

pattern

 

after

 

the

 

full

 

scale

 

ship.

 

I

 

wanted

 

to

 

cover

 

the

 

cowl

 

in

 

two

 

pieces,

 

one

 

left

 

side

 

and

 

one

 

right

 

side

 

but

 

the

 

radius

 

on

 

the

 

front

 

edge

 

of

 

the

 

cowl

 

was

 

too

 

difficult

 

to

 

cover

 

without

 

getting

 

a

 

lot

 

of

 

wrinkles

 

ironed

 

in

 

so

 

I

 

ripped

 

it

 

off

 

and

 

covered

 

the

 

cowl

 

with

 

about

 

six

 

smaller

 

pieces

 

that

 

were

 

easier

 

to

 

handle.

 

 

>>

 

One

 

of

 

the

 

features

 

of

 

the

 

Fokker

 

Eindeckers

 

is

 

the

 

distinctive

 

swirl

 

pattern

 

on

 

the

 

metal

 

covered

 

areas.

 

Like

 

the

 

Spirit

 

of

 

St

 

Louis,

 

if

 

it

 

is

 

not

 

there

 

it

 

just

 

does

 

not

 

look

 

right.

 

One

 

of

 

the

 

previous

 

posters

 

suggested

 

using

 

a

 

piece

 

of

 

a

 

Scotch

 

Brite

 

scouring

 

pad

 

to

 

impart

 

the

 

swirls.

 

I

 

have

 

an

 

old

 

electric

 

drafting

 

eraser

 

that

 

I

 

chucked

 

a

 

length

 

of

 

1/4

ʺ 

diameter

 

wood

 

dowel

 

in

 

and

 

glued

 

a

 

small

 

circle

 

of

 

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

 

minutes

 

to

 

do

 

all

 

of

 

the

 

chrome.

 

I

 

had

 

to

 

change

 

the

 

pad

 

piece

 

a

 

number

 

of

 

times

 

but

 

I

 

think

 

the

 

effect

 

came

 

out

 

well.

 

 

 

 

Next

 

is

 

the

 

attachment

 

of

 

the

 

rudder

 

pivot

 

tube

 

support

 

piece

 

to

 

the

 

elevator

 

pivot

 

support

 

tube.

 

 

The

 

design

 

calls

 

for

 

a

 

short

 

section

 

of

 

brass

 

tubing

 

that

 

fits

 

into

 

the

 

slot

 

left

 

in

 

the

 

rudder

 

when

 

it

 

was

 

originally

 

built

 

(See

 

post

 

#31

 

on

 

page

 

3).

 

This

 

piece

 

of

 

brass

 

tubing

 

is

 

to

 

be

 

bound

 

to

 

the

 

elevator

 

pivot

 

support

 

tube

 

using

 

some

 

Kevlar

 

thread

 

and

 

epoxy.

 

I

 

decided

 

to

 

cut

 

the

 

section

 

of

 

tube

 

and

 

then

 

silver

 

solder

 

it

 

to

 

the

 

elevator

 

tube

 

as

 

this

 

would

 

make

 

for

 

a

 

neater

 

installation.

 

The

 

design

 

is

 

fine

 

and

 

in

 

fact

 

is

 

probably

 

somewhat

 

easier

 

to

 

do,

 

however,

 

one

 

never

 

builds

 

a

 

plane

 

exactly

 

according

 

to

 

the

 

design

 

does

 

one??!!!!!

 

 

I

 

used

 

3/16

ʺ 

diameter

 

tubing

 

on

 

the

 

rudder

 

or

 

the

 

pivot

 

support

 

tubes

 

as

 

the

 

rudder

 

balsa

 

pieces

 

were

 

also

 

3/16

ʺ 

thick.

 

I

 

thus

 

cut

 

a

 

short

 

section

 

of

 

3/16

ʺ 

brass

 

tube

 

to

 

fit

 

the

 

gap

 

minus

 

about

 

10

 

thousands

 

or

 

so

 

to

 

allow

 

for

 

a

 

free

 

fit.

 

I

 

then

 

used

 

a

 

small

 

length

 

of

 

5/32

ʺ 

brass

 

tube

 

as

 

the

 

pivot

 

to

 

check

 

the

 

fit,

 

smoothness

 

of

 

rotation

 

on

 

the

 

pivot

 

etc.

 

When

 

done,

 

I

 

then

 

used

 

a

 

piece

 

of

 

sandpaper

 

to

 

thoroughly

 

clean

 

the

 

tube

 

piece

 

and

 

the

 

area

 

of

 

the

 

elevator

 

pivot

 

support

 

tube

 

where

 

it

 

would

 

be

 

attached.

 

I

 

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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