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Albatros

 

DVa

 

54”

    

Page

 

 

8

 
 

Copyright©

 

2005

  

Kurt

 

Bengtson

  

All

 

Rights

 

Reserved

      

Rev

 

10/05

 

 

Finished

 

Model

 

by

 

Dave

 

Ottney

 

 
 

Let

 

the

 

model

 

gain

 

altitude

 

slowly

 

off

 

the

 

runway.

 

Applying

 

too

 

much

 

up

 

elevator

 

at

 

slow

 

speeds

 

risks

 

a

 

stall.

  

Make

 

your

 

turns

 

gently

 

as

 

tight

 

turns

 

risk

 

tip

 

stalling

 

in

 

any

 

model.

 

Don’t

 

expect

 

the

 

elevator

 

to

 

make

 

the

 

model

 

climb.

 

Think

 

of

 

the

 

elevator

 

as

 

a

 

device

 

to

 

change

 

the

 

attitude

 

of

 

the

 

model.

 

The

 

wing

 

and

 

airspeed

 

ultimately

 

make

 

the

 

model

 

climb.

 

Often

 

down

 

elevator

 

applied

 

at

 

stalling

 

can

 

avoid

 

a

 

major

 

crash.

 

The

 

most

 

important

 

details

 

for

 

proper

 

flight

 

operations

 

are:

 

1)

 

CG

 

location.

 

Tail

 

heavy

 

models

 

never

 

fly

 

well

 

or

 

at

 

all.

  

2)

 

Down

 

and

 

right

 

thrust

 

3)

 

Straight

 

and

 

non

 

warped

 

wings.

  

  

Here

 

are

 

some

 

excerpts

 

of

 

Dave

ʹ

s

 

maiden

 

flights

 

.

 

“Throttling

 

up

 

it

 

lifted

 

off

 

in

 

about

 

10

ʹ

!!

 

I

 

couldn

ʹ

t

 

believe

 

it

 

just

 

kind

 

of

 

lifted

 

off,

 

nothing

 

radical

 

it

 

was

 

just

 

airborne

 

all

 

of

 

a

 

sudden

 

kind

 

of

 

level

 

and

 

climbing

 

at

 

a

 

shallow

 

rate.

 

I

 

powered

 

up

 

to

 

full

 

throttle

 

and

 

flew

 

straight

 

out.

 

It

 

needed

 

a

 

bit

 

of

 

aileron

 

trim

 

and

 

some

 

down

 

trim

 

to

 

get

 

it

 

to

 

fly

 

absolutely

 

level.

 

Speeds

 

were

 

scale

 

like

 

at

 

1/2

 ‐ 

2/3

 

throttle

 

with

 

only

 

a

 

bit

 

more

 

speed

 

when

 

it

 

was

 

fire

 

walled.

 

I

 

think

 

it’s

 

just

 

a

 

draggy

 

design

 

so

 

it’s

 

not

 

going

 

to

 

be

 

a

 

speedster.

 

The

 

full

 

throttle

 

performance

 

just

 

gives

 

it

 

ʺ

umph

ʺ 

when

 

needed.

 

 

I

 

found

 

aileron

 

turns

 

to

 

have

 

some

 

adverse

 

yaw

 

in

 

that

 

the

 

tail

 

dropped

 

a

 

bit

 

and

 

you

 

have

 

to

 

kind

 

slog

 

it

 

through

 

the

 

turn.

 

I

 

was

 

fortunate

 

in

 

that

 

Gary

 

Allen,

 

a

 

pretty

 

renowned

 

scale

 

modeller

 

who

 

belongs

 

to

 

our

 

club,

 

standing

 

near

 

by

 

giving

 

me

 

some

 

tips

 

on

 

how

 

to

 

deal

 

with

 

the

 

adverse

 

yaw.

 

I

 

had

 

pre

programmed

 

some

 

rudder/aileron

 

mix

 

in

 

on

 

the

 

radio

 

but

 

the

 

setting

 

wasn

ʹ

t

 

right

 

so

 

I

 

turned

 

that

 

off

 

and

 

did

 

coordinated

 

turns

 

manually.

 

I

 

did

 

find

 

that

 

I

 

had

 

to

 

give

 

it

 

a

 

bit

 

of

 

throttle

 

through

 

the

 

turns

 

and

 

then

 

would

 

throttle

 

back

 

for

 

straight

 

flight.

 

During

 

a

 

couple

 

of

 

circuits

 

I

 

found

 

that

 

pure

 

rudder

 

turns

 

with

 

the

 

appropriate

 

elevator

 

input

 

made

 

for

 

very

 

smooth

 

turns.

 

I

 

took

 

it

 

up

 

higher

 

and

 

throttled

 

back

 

applying

 

full

 

up

 

to

 

see

 

what

 

the

 

stall

 

would

 

be.

 

One

 

shutter

 

and

 

it

 

“mushed”

 

straight

 

forward

 

regaining

 

speed

 

and

 

lift.

 

I

 

kind

 

of

 

figured

 

it

 

would

 

be

 

like

 

that,

 

so

 

landings

 

would

 

be

 

simple

 

as

 

it

 

turns

 

into

 

a

 

real

 

floater

 

when

 

slowed

 

down.

  

As

 

with

 

the

 

other

 

planes

 

I

ʹ

ve

 

done

 

for

 

Kurt,

 

this

 

one

 

is

 

a

 

real

 

nice

 

flier.

 

I

 

didn

ʹ

t

 

attempt

 

any

 

scale

 

aerobatics

 

but

 

I

ʹ

m

 

sure

 

it

 

will

 

be

 

capable

 

of

 

loops,

 

very

 ʺ

barrelly

ʺ 

rolls

 

and

 

nice

 

stall

 

turns.

 

Again

 

its

 

slow

 

speed

 

characteristics

 

relieve

 

the

 

fear

 

of

 

coming

 

close

 

to

 

the

 

ground.

 

I

 

also

 

think

 

that

 

if

 

you

 

wanted

 

to

 

try

 

something

 

like

 

a

 

Magnetic

 

Mayhem

 

or

 

Endoplasma

 

geared

 

like

 

in

 

the

 

E3D,

 

it

 

would

 

work

 

well

 

with

 

this

 

plane.

 

I

ʹ

ve

 

flown

 

these

 

systems

 

also

 

and

 

I

 

think

 

this

 

plane

 

would

 

be

 

fine

 

with

 

them

‐ 

nice

 

economical

 

alternative.

 

  

 

CONTACT

 

INFORMATION

 

 

Distributed

 

by:

 

 

Bengtson

 

Company

 

PO

 

Box

 

51102

  

Pacific

 

Grove

 

CA

 

93950

 

 

Phone

 

and

 

Fax:

 

831

393

0991

 

 

e

mail:

 

[email protected]

 

Web

 

Site:

  

www.aerodromerc.com

 

 

Summary of Contents for Albatros DVa 54"

Page 1: ...lbatros DVa 54 R C Scale Model Instructions CONTACT INFORMATION Designed by Kurt Bengtson Prototype by Dave Ottney Manufactured and Distributed by Bengtson Company PO Box 51102 Pacific Grove CA 93950...

Page 2: ...ormer stringer and keel construction Fuselage is sheeted or planked Removable wings Top and bottom wing alignment is built into model Scale dihedral includes in wing ailerons Removable laser cut balsa...

Page 3: ...fuselage side frame over the plan including the side keel Add the front former F2 and the last former F7 then the side keel Using the side keel the other formers are added aiding their correct alignme...

Page 4: ...ingers are there for support of the sheeting planking only If sheeting is to be used and to avoid the difficulties that Dave had in sheeting choose the lightest balsa Cut to a rough shape and soak in...

Page 5: ...he uprights can add significant strength It is also possible to fashion a shock absorbing axle by adding a second axle on top of the one that secures the undercarriage Landing Gear Detail Attach the s...

Page 6: ...rs Peel off the paper and adhere to your model Use black material for the crosses and white for the backgrounds WHEELS Gluing the ply sides on the balsa core makes the basis for the wheels Use the bra...

Page 7: ...BLY Wing Mounting Aligning Bolts on Wing Panels The lower wing is attached to the fuselage through two 8 32 nylon bolts that screw into blind nuts in the ply ribs located in the bottom wing The cabane...

Page 8: ...ol surfaces centered glue the horns into their slots Pushrods Fitting the Rigging Wires Use strong thread or Kevlar fishing line or elastic beading cording to simulate rigging wires Use small screws f...

Page 9: ...t and you have to kind slog it through the turn I was fortunate in that Gary Allen a pretty renowned scale modeller who belongs to our club standing near by giving me some tips on how to deal with the...

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