Veteran - Location: Ottawa - My Posts This: TopicForum
Specifications: Length: 1305mm Height: 410mm Width: 710mm Main rotor diameter: 1400mm Tail rotor diameter: 260mm Main rotor blades: 620mm-660mm Tail rotor blades: 90mm Flight time: ~20 Minutes with a consumption of 300 ml. Empty weight with ZG20 Engine: 3659g Weight complete with electronics ca.4431g without fuel
Specifications ZG20 Petrol Engine: Displacement: 20.1 cc
Bore: 32 mm Stroke: 25 mm
Power: 1.73 hp with our 3D tuning silencer:> 2.4 hp Weight only by the engine: 1185g complete with ignition, muffler, engine cradles and velocity stacks.
The current consumption of the ignition at 3.7 V: 1.1 A. In Idle from 4500 rpm engine speed to 1.6 A. The quiescent current is 45 mA. Our 3000 mAh Li-Polymer is sufficient for 30-minute flying time.
The kit contents: - Basic kit with standard white-painted hood Fiberglass - ZG20ccm ³ Zenoah gasoline engine with electronic ignition - Standard-Silencer
Optional Accessories & Tuning Parts: - Pull starter original Zenoah
- Alu-Tuning exhaust 3D/F3C
- Li-Po battery 3000mAh / 3.7 V
- Electronic ignition for the ZG20 Petrol Engine
- Painted Airbrushed Fiberglass canopy
The Radikal G20 gasoline helicopter is 3D-capable and of course, F3C. With a stable framework of the latest generation G10 frame and gasoline Zenoah engine it is suitable for all aerobatics. With its high torque and its relatively low speed, the Zenoah high smoothness, from his vibration operation results.
The kit also contains other electronics to build all the necessary components. Individual modules are pre-assembled, so that the Radikal G20 is ready to fly in a short time. The standard engine is started with a standard hexagonal starter. For those who want to give up a electric starter, there is an optional recoil starter.
Including Zenoah ZG20 petrol engine with electronic ignition, standard exhaust! Also, the use of scale-muffler is possible without restriction.
Rotor Head: Rotor head with aluminum yoke and reinforced plastic blade grips. Stabilizer rocker filled with ball bearings and adjustable Program for the FAI or 3D aerobatics. Continuous blade bearing shaft with adjustable damping. Stabilizer bar with an extra-stable linkage. CNC Machined, full ball Bell-Hiller mixer lever. Adjustable Bell-Hiller mixer to achieve the preferred mixing ratio. Stable Main Rotor Holder with 5mm rotor blade bolt. Blade holder with 18mm width allow the assembly of rotor blades from 12 to 18mm blade root. 29g Hiller Paddle for sport and 3D aerobatics. Two and a ball Thrust bearing in each blade grip. 10mm hardened rotor shaft.
Control system: Electronic CCPM with three servos. Electronic CCPM configurations in 120 ° or 140 °. Push / Pull hinged double ball-bearing rocker. Double ball-bearing Pitch levers. Aluminum pitch compensators for a minimum of play. Double ball-bearing, CNC Machined Swashplate for 120 ° or 140 linkages. 24 º Pitch range.
Drivetrain: Various gear ratios possible.
Tailrotor in autorotation. Upper and lower rotor shaft bearings clutch bearings in one-piece bearing block for maximum rigidity. Adjustable backlash. Stable 15×24mm clutch bearing support by ball bearings. Hardened 15 tooth clutch sprocket. Heavy clutch for a quiet idle. Hardened Hex to receive the E-starter extension.
Two rotor shaft collars to adjust the tooth mesh. Machined impact-14mm spur gear from Delrin for maximum loads. High quality ball bearings and screws. Cabin: Fiberglass cabin in white with iIncorporated carbon fiber reinforcements. Pre-drilled holes with rubber grommets for mounting on the mechanics. Tinted, high-gloss windshield. The necessary holes or openings for the swash plate and starter adapters are already prefabricated. Streamlined design for the fast forward flight.
Main Frame: Very stiffer G10 main frame with CNC milled lower bearing blocks. Carburetor fuel level located at centerline for a smooth Engine operation in all flight attitudes. Large 300 ml tank for long flight times. Separate front and rear frame allow for easy expansion the engine with carburetor and muffler. End Plate Frame in the cross design for reinforcement, in all three axes. Rear-facing cylinder head for optimal weight distribution for high maneuverability. Extra long front panel to secure Fixing the RC components. Convenient and easier access to the spark plug. Stable, but at the same flexible flat landing gear to accommodate hard landing shocks. Engine plate is made from CNC-machined aluminum.
Tail Rotor: Dual-ranging expertise and ball-bearing tail rotor drive gear. Multiple-ranging expertise in tail rotor drive gear for a smooth drive of the tail rotor. Dual ball-bearing, rigid drive shafts Carbon-Tailrotor linkage. Hardened steel tail rotor gearbox gears, helical cut. Dreifachgelagerte Tail Rotor Blade Grips (2x and 2x ball thrust bearing). At the tail boom mounted tail rotor servo for minimal slop. Ball bearing tail rotor pitch bridge for a linear tail rotor control. Flexible 3D elevation and side fins. Extra large 5×13mm bearings in the tail rotor gear box output. Sturdy, extra lightweight tail boom. Tail boom struts made of lightweight duralumin. Impact-resistant and lightweight 4.5g 95mm tail blades. Hardened Tail Rotor Shaft
The one-stage gearbox for minimal friction losses. The swash plate is hinged with three servos to 120 degrees. The tail boom is supported to minimize vibration.
The tail rotor servo is right on the tail boom mounted, thus there are no corrections to the steering linkage to a dismantling of the tail pipe is required. The tail rotor is articulated with a sturdy handle. The figure shows the Gasser with carbon fiber tail rotor blades and tail fins.
The servos employ a push & pull system. This will assure the power transferred to the swash plate and the servo are unilateral. The image shows optional aluminum servo horn The rotor mast with swashplate, pitch compensators, Hiller mixers and rotor head. The continuous sheet bearing shaft gives the necessary rigidity of the rotor head for the hard-3D usage.
These photos are of an early proto-type. Several changes have been made since these photos have been taken. No current production model photos were available to publish at the time of this writing. The decals will also be different for the canopy.
Confirmed by Century Heli USA:
Release in Europe is slated for the beginning of October 2009. Release in the USA should follow shortly after.
This model will be available with or without engine. The engine is a Zenoah G20 that is sourced from Horizon. The current frame is G10, but a carbon fiber version will be produced at a later date.
This model will be available with either a Predator rotor head (HT version) or a revised and upgraded NX-50 style head (LT version) that has had its shafts and bearings enlarged.
MAP pricing on two variants:
Radikal G20 HT with Predator rotor head and no engine $549.95 USD
Radical G20 LT with upgraded 50-size rotor head, no engine $499.95 USD
The HT version can be stretched to use 90-size rotor blades.
The model is currently on the water and should arrive in mid-October 2009.
What do you guys all say..
Raven
Vision 50 Flybarless Super Modified 5s Brushless 130MPH+ Stryker F-27
Ahhh now I have to wait out in the pumpkin patch for the great pumpkin to bring me mine ! Good timing for me the temp will be nice and cool to break in that gasser !
i wish i could afford to get helicopters flying as fast as Century pumps them out!
notice that the frames are made in sections and held together via bearing blocks. if you break a section in a crash, your not changing the entire side of the helicopter.
the design of the helicopter looks extremely simple and to the point. It also looks like it would be easy to work on.
i noticed the spec says up to 660mm blades. as far as i know, Rotor tech doesn't make 660mm blades anymore, if they ever have. I wonder if they will bring out 660's for this heli.
Thats very nice. That is a Century isnt it? Wheres the good ole' upper frame assembly!! I like it. Now I just gotta figure out how to put a 50 nitro in it...
No anti rotation bracket?
The good ole times are now ,Hawk, Raven, Raven NX, Logo 10
Thats one of the best looking frame layouts that century has come out with and you guys made it a gasser???
Next thing...
Weight complete with electronics ca.4431g without fuel
Be blunt about it too...
4431 grams = 9.76868284 pounds
The engine didnt really show off blinding power in the videos and it looked like the tail had a couple issues in the hover which I hope isnt from that high voltage box in the back of the airframe or from static build up on the boom.
Im not trying to be negative, I wouldnt say anything if this design didnt have a lot going for it. Hell make it fit 90 sized engines, too, or at least make mounts for a 90 or the new 55 engines....now that would be radical!
The engine didnt really show off blinding power in the videos and it looked like the tail had a couple issues in the hover which I hope isnt from that high voltage box in the back of the airframe or from static build up on the boom.
It's a gasser. But then if you knew anything about gassers, you'd know that while breaking in the engine, the tail will kick a little. All I saw in the hover video, was an engine running rich and the tail kicking a little is normal...
Eco8gator , youtube says that clip was posted March 11, 2009, god knows when the clip was made, and the info above says (quote) ""These photos are of an early proto-type. Several changes have been made since these photos have been taken""
So your telling me that a few frame changes braught the weight down? Unless that engine has been remade or lightened or what ever then the weight is still around 8.5-9 pounds.
And your right, I know nothing about gassers other than the one I flew down here in palm beach didnt really kick like that but it was definitally broken in and flying good...it was a Century Pred BTW.
Again, I like the frame design. But if Century is making another IC based frame design why on earth is it only a gasser and one that is on the heavier side? With a nitro engine mount for a 50 and possibly a 90 it would be super sweet and a huge upgrade to the nitro century heli line. I mean come on the NX looks reasonable but IMHO that wasnt the right step fwd, this airframe is the right step forward.
Nothing like a good smooth motor...I have heard some engines are not smooth, but the stock engine I have was ruff when first setting up, but after adjusting the timing with good needle settings, it does fine.. Just like with any gas engine, it can always use some balancing...
If your thinking about vibrations dampeners, no way...Its not needed if you do it right ....
Its best to have everything hard mounted, even the tank...The tank can give you clues to getting rid of vibs..
If you mount the engine with rubber on the bottom, the next joint, or connection is the clutch bell which is hard mounted..If the clutch moves from vibs on the bottom, then the clutch will loose its grip performance, which will screw up your auto clutch bite, which will strip gears, which will make you unhappy....
You would have to isolate the clutch and engine with dampeners, but then if using direct drive, you would chew on the main gear..You could do belt drive, with a belt tension device..
