The Hyperion YAK-54 40e sets the new
benchmark in electric aerobatic models. Constructed of hand-picked light
balsa and ply, the fuselage, wing, and tail group carefully follow the lines of
the full-size Russian YAK 54. The hand painted fiberglass cowl is simply... a
work of art: YAK54 louvers are molded in, and the paint and striping are a
perfect color match to the model covering. The prepainted super-clear canopy is
already mounted on a wood frame, with a preinstalled canopy latch for retention
to the fuselage (sorry, nothing for you to do here either!). Battery access
takes just a few seconds...
In order to please the 3D enthusiasts, Hyperion designers increased the aileron,
elevator, and rudder surface area, while staying very near the original outlines
of the whole flying surface. Unusual for a model in this size range, the tail
group is fully airfoiled; just another pointer to the dedication of the
Hyperion design crew. It's all simply beautiful, and a lot of fun when your club
members crowd around to get a look at the YAK...
In terms of size, the YAK-40 "40e" can be related to "Engine 40" class models,
but the little "e" means it is 100% electric. Designed from the "ground up"
around the extremely powerful Hyperion Z4020-14 motor, you have to experience
the performance yourself to believe it. At about 200W per pound, "Unlimited
Vertical" is just the beginning!
The YAK-54 40e weighs in at 5 pounds maximum (~2.3Kg). This very light weight
coupled with generous wing area and extremely rigid construction lend the YAK-54
an extremely wide performance envelope, from 3D Maneuvers to high-speed, Big Sky
Aerobatics. It will surly become the model that gets taken out every weekend;
it's that much fun to fly! The wings are removable in a matter of a few
seconds, for easy transport to the field, and storage at home.
Bigger flies better, and this large model is also very easy to see at a
distance. That sharpens the manuvers of any pilot, and is especially helpful if
your eyes aren't "what they used to be".
In the May 2006 issue Fly RC Magazine, they say this about the YAK 54 40e:
"The Hyperion Yak-54 “40e” is exactly what I was looking for. It is a
.40-size scale aerobatic model that not only comes in lighter than its glow
counterpart, it also offers superior performance. It also comes standard with
items usually found only with much larger and costlier airplanes. These include
a carbon wing tube, airfoiled tail surfaces, and a perfectly painted fiberglass
cowling. The Hyperion Yak has it all – including performance to match!"
We think you'll agree.
Click here for video of the original YAK 54e Production
Prototype
With this "REALLY-almost-ready-to-fly" just about everything is already completed for you. Just insert the hinges in the pre-slotted control surfaces and CA glue them, install servos/receiver, motor, controller and battery, screw on the cowl, then mount the propeller. An experienced builder can be ready to fly in three hours! The kits contain English-text build guide written by native English speakers, and CAD drawings for no-mistakes assembly.
We strongly recommend that you purchase Hyperion kits with
the "power set" option, for three good reasons:
First, the models are specifically developed for the power set, and extensively
flight tested to insure both stunning performance and perfect reliability.
When you buy the kit with power set, both the Kit and the Power Set have
discounts applied. In some cases this can amount to nearly 20%, and you always
save 10% or more on kit, motor, controller, adapter, and connectors.
And you can't get better quality parts, anywhere, at any price...
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YAK-54 40e POWER SET |
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| Z4020-14 MOTOR | TITAN 80A OPTO ESC | HP-Z40-FRTMNT |
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 |
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| 75g, 260W Peak in YAK55SP | Program by PC, Emeter, or Tx | Keeps prop on the motor! |
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Recommended |
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 |
 |
|
see comments |
HP-LVX3700 4S or 5S |
HP-LCL4200 |
PQ-3700XP 4S or 5S |
|
Required/Recommended Gear:
Required Tools:
HYPERION Z4020 Motors + TITAN 80A OPTO Power Set Here is some data using Hyperion LCL Series lithium battery packs and APC “E” series propellers. These results are with a freshly charged battery pack during the first 10 seconds of discharge. Actual average current would be lower, as battery voltage drops during the flight. Keep in mind, also, that these are EXTREMELY powerful systems, so full throttle is rarely used, and most of the flight is at half throttle, on average. TESTS BELOW WERE CONDUCTED AT MORE THAN 3000 FEET ABOVE SEA LEVEL. At sea level, amperage will be higher, so be careful to check motor temperature after first short flights. Peak current of about 55A~65A is ideal.
And
here are comments from one expert test pilot: (AT 3000' ABOVE SEA LEVEL) |
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ENJOY YOUR RUSSIAN THUNDER!
Copied with ACW permission.
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