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Introducing Alligator Aerodyn
Modification for all Zenoah RC Series of Engines to use in R/C Gas Helicopters
(G230RC, G240RC, G260RC, G270RC, G290RC and G3x0RC)
In 2009, when Helibug first introduced a unique mounting system design for
Zenoah RC Engine, It was an obvious winner. After a lot of critics in the
begining from all over the world, it turned out that many manufacturers
started to dump a copy of our design without adding any innovation to it.
Lesson learned :)
offcourse, it is the most successful mounting system ever designed in the
history of RC Helicopter by Helibug.
But many of the 'copiers' missed the most important part of a correct gear ratio. In the
history of r/c gas helicotper, before Helibug was established, any gas
helicopter gear ratio below 7 was like 'the sky will fall' - these are the
documented expressions left on many public forums if you search a little.
Our gear ratios made it possible to flow more usable power to the r/c gas
helicopters.
Its now time to give a better design in the form of Alligator
Aerodyn
As important as 'weight' is in any RC Helicoapter, 'Mass' is equally
important for any 3D maneuvers. Flying in 3D takes a lot more power from the
engine when there is a huge mass trying to fight the wind during flips,
rolls or any other 3D flying. It is a mathematical fact.
Alligator Aerodyn is based on any stock zenoah rc engine. Utilizing the
engine without pull start and pull start cover to reduce a huge mass and
weight off the engine.
Alligator Aerodyn does not require pull assembly and pull start cover
Note: Flyers using a modified engine; please check with your engine
modifier for the maximum temperatures their modified engine hits. Modified engines produces much more heat
(in some cases up to 300 Farhanheit) compare to stock engine.
Alligator Aerodyn mod is tested on a stock Zenoah/CY engine with no
over heating issues.
Reduced Mass
Alligator Aerodyn is a re-engineered modification for any Zenoah RC engine
with basic Aero Dynamics applied to the engine design to reduce excess mass in the
form of stock fan cover, pull start and lightened flywheel. Alligator
Aerodyn uses the core of any Zenoah RC engine. Modular design for additional
advance features like built-in remote mini autostart & spring loaded pull
start.
Using 'engine crankcase' as a strong connecting element, Alligator Aerodyn
features a built-in 'stepped mounting' system to reduce the width &
length of the side frames. This modification alone, reduces around 40% mass
from the engine.
Embedded Engine Internals / Engine
Turn-off Switch & RPM Sensor Locations
The Alligator Aerodyn CNC machined fiber reinforced bottom plate is machined
with the engine internals to house stock fan shroud, flywheel, ignition and
engine turn-off switch. Skids mounts direct to the bottom plate at an
independent location which does not require you to remove the side frame
screws. Any RPM sensor for gyro can be installed with a ziptie easily.
Lightened Flywheel - DIY'able :)
From years, lightened flywheel is used as an option on HPI Baja R/C
cars. It is a 'time tested' method, used to cut some weight off of r/c car.
A pull-start is the only way to start r/c car unlike r/c helicopter, where
we have the option to start the engine with built-in start shaft using
electric starter. Alligator Aerodyn does not require zenoah stock pull
starter area as the design allows us to use Spring Loaded pull start.
With this feature, almost 15mm of the bottom mass from the flywheel is
removed. It is a proven technique - only better in r/c gas helicopter.
A modified flywheel or complete engine with modified flywheel is available
through Helibug. This mod can be a DIY with a small hobby size lathe or from
any small machine shop or ask your favorite engine seller/modifier.
(For DIY: Flywheel fins needs to cut down by 11.50mm - Center area used for
pull start needs to cut down by 15mm)
Spring Loaded Removable Pull Start Option
(Coming Soon)
Agronomically designed pull start lever direction for even easier pull.
With an 'optional' attachment for spring loaded pull start from CY 46cc
engine, turns the starting mechanism into almost effortless. This also
guarantees that you never break your r/c gas helicopter skids. Spring
loaded system makes it easier as its loaded with spring acts like power
storage. you will never need to hold your r/c gas helicopter with a foot to
start. This gives the flyers additional pleasure start from the begining of
a nice flying day.
On-board 150+ Watt Alternator/Generator
Option (Coming Soon)
Alligator Aerodyn features an on-board alternator/generator. High power in a
small size.This alternator will require the bottom part of the engine and
installs on the flywheel. More details will be available very soon !
Integrated Side Frame Mounting
Alligator Aerodyn utilizes engine mounting from both sides of Crankcase
(Top & Bottom) and works as a 'stepped-baseplate'. Engine crankcase
keeps a strong bond between the top and bottom plates eliminating the need for additional frame material used on
the forward side of the r/c helicopter.
With all that, Alligator Aerodyn is fully detachable system - just like
Helibug Spark Design. You will be able to remove Alligator Aerodynr
completly without the need to remove any sides of your r/c helicopter.
Overall, around 40% of the 'mass' is removed from the engine resulting in a
much better performance without wasting too much power due to a huge mass
when flying in 3D
Like any other nitro engine, you will need a Helicopter Engine Starter -
Align Super Starter can handle the starting section perfectly. Thats what
Helibug recommends to use for all non-DIY flyers. If you are a DIY'er than
there is nothing better than a custom Dynatron starter with Makita Lithium
battery pack :)
Other than DBug-600 Universal,
Alligator Aerodyn will be available for many other active RC Helicopter models
Please follow the links on the left for 'Alligator Aerodyn Enabled' r/c gas
helicopter reference design kits
WARNING: The radio
controlled model helicopter built from this conversion kit is not a toy and
is not meant for children. It is a flying machine capable of causing
property damage and serious bodily harm to both the operator/assembler
and/or spectator if not built and operated correctly and responsibly.
Rotating components, especially the main rotor blades, are an ever-present
danger. Model helicopters operate differently than model cars and airplanes.
Helicopters by their nature are not positively stable, meaning that even if
properly assembled and adjusted, helicopters will not recover from an
unwanted flight attitude, nor will they hold any particular orientation
without constant control inputs from the pilot.
IT IS YOUR EXCLUSIVE RESPONSIBILITY TO PROPERLY BUILD,
MAINTAIN AND OPERATE R/C HELICOPTER.
HELIBUG has spent considerable time making this product
reliable and easy to build, but only the operator can insure that it is
safe. Because the safe operation of this helicopter is beyond the control of
the Manufacturer and distributor, the owner/operator assumes all risk of
use.
