Twin Shark
Instruction Manual
INTRODUCTION
BEFORE YOU START
1. If you are not an experienced R/C pilot, plan to have a fully competent
pilot check your completed model and help you with your first flights.
Even though we have tried to provide you with a thorough instruction
manual, R/C models are rather complicated and an experienced mode-
ler can quickly check over your model to make sure your first flights are
successful.
2. Please assemble your model exactly according to these instructions. Do
not attempt to modify or change your model in any way as doing so may
adversely change its flying characteristics.
3. Before you begin, please check the entire contents of this kit to make sure
that no parts are missing or damaged. This will also help you to become fa-
miliar with each component of your plane. If you find that any of the parts
are either missing or damaged, please contact your dealer immediately
for replacement.
Note: Your dealer cannot accept kits for return if construction has begun.
4. Trial fit each part before gluing it in place. Make sure you are using the
correct part and that it fits well before assembling. No amount of glue can
make up for a poor fitting part.
5. The manual contains drawing showing the default position of the Centre
of Gravity (CG) and recommended control surface throws. Please note it is
essential to keep the recommended CG position for the first flight other-
wise the model could be unstable, hard to control or even unable to fly
at all! Later you can fine tune the CG position to suit your flying style and
skills.
SPECIFICATION
Wingspan
2700 mm
Length
1285 mm
Wing area
45 dm2
Weight
1680 g
All-up Weight
1950-2050
Motor
C3548-750
ESC
KAVAN R-50SB SBEC
Propeller
11x8”
SAFETY PRECAUTIONS AND WARNINGS
• An R/C aeroplane is not a toy! If misused, it can cause serious bodily harm
and damage to property. Fly only on a safe place following all instructions
and recommendations in this manual. Beware of the propeller! Keep loose
items that can get entangled in the propeller away from the spinning pro-
peller, including loose clothing, or other objects such as pencils and screw-
drivers. Ensure that yours and other people’s hands, and face are kept away
from the rotating propeller.
• As the user of this product, you are solely responsible for operating it in a
manner that does not endanger yourself and others or result in damage to
the product or the property of others. This model is controlled by a radio
signal that is subject to interference from many sources outside your con-
trol. This interference can cause momentary loss of control so it is advisable
to always keep a safe distance in all directions around your model, as this
margin will help to avoid collisions or injury.
• Never operate your model with low transmitter batteries.
• Always operate your model in an open area away from power lines, cars,
traffic, or people. Avoid operating your model in populated areas where
injury or damage can occur.
• Carefully follow the directions and warnings for this and any optional sup-
port equipment (chargers, rechargeable batteries, etc.) which you use.
• Keep all chemicals, small parts and anything electrical out of the reach of
children.
• Moisture causes damage to electronics. Avoid water exposure to all equip-
ment not specifically designed and protected for this purpose.
• The model is mostly made of plastics - it is not fireproof. It may not be ex-
posed to higher temperatures otherwise severe distortion of the foam air-
frame or other damage may occur.
SET CONTENTS
YOU WILL ALSO NEED
• At least seven channel RC set, 14.8 V 2600-3300 mAh LiPo flight pack.
• Regular modeller’s tools - modeller’s knife, screwdrivers, pliers etc.
• Almost ready to fly model of a sailplane with the brushless motor, speed
controller and servos installed, instruction manual.
3
MODEL ASSEMBLY
Congratulation on your purchase of the semi-scale model of the HPH 304TS Twin
Shark sailplane! You are about to start the assembly of a model manufactured
from virtually unbreakable EPO (extruded polyolephine) foam powered by a
mighty brushless motor and lightweight LiPo battery. Everybody who has al-
ready mastered flying a “full house” trainer - with aileron, elevator, rudder, and
throttle control - will enjoy this beautiful high performance glider.
HPH 304TS Twin Shark – a Czech sailplane with German roots
In 1962 Eugen Hänle founded the Glasflügel Segelflugzeugbau GmbH. that soon
has become famous as the first company to produce glass-fibre sailplanes in
large numbers. Glasflügel’s designs have been always known for innovative solu-
tions becoming standard features of modern sailplanes: quick assembly systems
for wings and tailplane, trailing edge airbrake-flap combinations, highly practi-
cal cockpit and control system design and many more. Unfortunately, after the
untimely death of the founder in a flight accident in 1975, the company encoun-
tered financial difficulties; it was finally dissolved in 1982.
In the middle of 1990 a young Czech company called HPH (already established as
a museum quality scale model manufacturer) restored the production of one of
the latest sailplanes designed by the Glasflügel – Type 304. The manufacturing
plant in Kutná Hora (central Bohemia) started with the HPH 304CZ built using the
original moulds and jigs, later upgraded to 15 metres FAI class HPH 304C Wasp; in
2006 they introduced a brand new 18 metres class design named HPH 304S Shark
and finally the 20 m two-seater class sailplane HPH 304TS Twin Shark in 2017.
1. Connect the aileron (A) and flap (F) servo cables to the corresponding ex-
tension cables in the wing opening in the fuselage - double check the co-
rrect connection.
(Fig. 1)
Note:
The kit is supplied with Y-cables for ailerons and flaps so you can use
even the most basic 6-channel radios to control your Twin Shark. If you intend
to use independent control of aileron and flap servos and an advanced com-
puter radio, you will have to replace the default Y-cables with four 25-30 cm
extension cables.
2. Insert the wing halves into the fuselage and secure with the M6 nylon bolt.
(Fig. 2)
3. Attach the horizontal tailplane to the top of the fin and secure with two
M3x10 mm screws.
(Fig. 3)
4. Attach the elevator push rod (the elevator servo is installed in the fin) to
the elevator horn.
(Fig. 4)
Your Twin Shark is fitted for the belly landing as supplied; you might wish to add
the undercarriage.
5. Remove the screw and the foam filler from the landing wheel bay.
(Fig. 5)
6. Install the wheel yoke using the same screw into the wheel bay.
(Fig. 6)
7. Insert the wheel into the yoke, attach the dummy undercarriage doors
from both sides of the yoke and secure with two screws. (Fig. 7)
