|
Simon
Cocker's M.Y.A. 'Bison' is a model of the Russian 4 jet reconnaissance
aircraft. Like John Hill's Dash 8, it is most impressive
in flight. Span is 92", length is 80", AUW is
6.5lbs. Controls are Rudder, Elevator, Ailerons and
Flaps. Simon sent in a few extra constructional details
and ideas for other similar model layouts worthy of
consideration. I quote : -
"This
model proved to be of easy and reasonably quick and cheap
construction. Basically, the components were cut from
white foam and veneered by Pat Teakle as follows : -
| 1. |
Fuselage |
Veneered
inside and out, being supplied in 2 halves, i.e. - in a
long cylinder cut into 2 section across the
diameter. Rear section of the fuselage is conical
shaped, again in 2 parts.
|
| 2. |
Fin |
One
big part.
|
| 3. |
Tailplane |
Two all moving
tailplane halves. |
| 4. |
Main Wings |
Full span top spar, 2/3
span bottom spar. Bowden outer cables installed
for both aileron and flaps. |
The
nose section and tailcone were shaped from balsa block, wing
retainers are 12mm flat steel strips with rear incidence piano
wire peg. Good old elastic bands on cupboard hooks -
small self tapper type screws straight into 1/8" ply wing
root holds wings onto fuselage very effectively.
The
all-moving tail is very simple. Bowden cable and grub
screw linkages for Rudder, Elevator, Aileron and flaps.
The whole model is covered in silver solarfilm with panel
lines marked on wing with permanent ink architect's pen, stick
on self adhesive matt black vinyl for windows etc. Jet
intakes are from 1/4" sheet balsa and jet nozzles from
blue foam."
|
Simon
Cocker with his completed 'Bison' at the Leek PSS Fly In
- 1988 |
Simon
suggests that the Tupolev Tu-20 'Bear', Tu-16 'Badger' and
Boeing B-52 Stratofortress can be similarly built to his Bison
layout and continues : -
"In
designing one of the above to take to a stage where the
cutting templates can be made, it is first necessary to draw
up a full-size model from a 3-view. I use decorating
lining paper - decide on the span of your model and mark that
out. Now draw around the centreline the fuselage
shape. I usually scale up the 3-view to about 1/3 size,
noting on the drawing all the appropriate dimensions in mm's
and then work at the corresponding scale.
You
can soon have a full-sized plan view of the model drawn
up. It is obvious where your formers must go to plot the
template positions for the fuselage etc. Likewise for
wing, fin and tailplane template positions at tips and
roots. Wing templates can be cut using sharp scissors
from either 1/32 ply (sanded carefully) or thin gauge
aluminium printing plates obtainable from local printing
firms. Lead in 'tabs' on start and finish for the
cutting wire to rest on should also be incorporated into the
rib templates.
Hollow
out the fuselage sides and veneer inside and outside.
Apart from reducing weight a little, a hollow fuselage enables
one to vary the position of R/C equipment - thus locating the
CofG at the correct point without the need for ballast."
<Back>
|
