STEAM AK420 KIT (with blades)
Since 2006, the Steam team has been working on the design and manufacturing of helicopter models. The AK420 helicopter is the latest innovation designed by the Steam team, which has redefined the standard for this class of helicopters. From the MK550/600 to Armor 700V1/V2/V3, to the AK400, AK700, and today's AK420, it is a combination of many different models.
(Internet is a memory, in 2011, we first proposed the concept of reducing the height of the main rotor, so that the power of the helicopter is more concentrated around the center of gravity, improve the sensitivity and responsiveness of the helicopter speed, this concept of low rotor head, now used by many manufacturers. This time the AK420 also uses these classic, both structural strength and aesthetic design; It can make your blood boil and sweep the sky.
The canopy is customized with ultra-thin fiberglass fiber, and the overall streamlined wrap and fit design brings good aerodynamic performance. Landing Gear adopts high strength reinforced plastic material injection molding, overall low and streamlined design, multiple mortise and tenon design, while increasing the hood clip. Effectively enhance the structural strength without increasing the weight.
The metal blade grip is equipped with the double hole rotor arm to obtain high strength axial and radial locking. This is an innovative patented design. The linkage ball mounting hole can have two sizes of 23.5/24.5MM at the same time, which can make the subtle change of 1MM from linkage ball to the center to correspond to the required flight feel. Double hole design can bring high cost performance of products. When the 380MM main rotor is used, the inner linkage ball mounting hole can be used. When the 420MM main rotor is used, the external linkage ball mounting holes can be used. Both sizes of the main rotor can control the helicopter, get a comfortable flight feel.
The open carbon fiber battery tray facilitates the installation of the battery, while strengthening the front frame structure of the fuselage, allowing the battery to be removed from the fuselage in case of strong impact, reducing damage to components. The carbon fiber motor protection board effectively widens the fuselage and facilitates the use of larger 32 series motors. Metal motor base adopts 6061T6 aluminum alloy high-precision five-axis CNC machining. The multi-way motor line outlet is reserved, which can disperse the installation stress of the motor base and reduce the wear of main gear caused by vibration. The highly integrated design results in a lighter, more rational structure.
Thick as a brick, up to 12mm thick main gear, redefine the helicopter industry main gear standards. Imported steel materials full CNC machining, high-precision CNC hobbing, the overall strengthening of the large frame mortice and tenon design, bring a lighter and stronger structure, Steam main gear strength is different, please apply Steam rubber grease HOT00006 when using to obtain better wear resistance.
The metal main gear central housing adopts a wedge-block bearing to lock the spindle, and its locking force is 3 times that of the ordinary needle one-way bearing, which can effectively prevent the spindle from slipping. The thickened center seat aluminum ring can effectively prevent the shaking of main gear in high-speed operation, and the use of upper and lower flange bearings makes the installation more convenient.
The tail drive gear adopts 6061T6 aluminum alloy material full CNC machining, high-precision CNC gear hogging, the overall enhancement of the large frame of the split mortice and tenon design, greatly reducing the manufacturing cost, the embedded gasket design structure, bringing better installation experience.
The electronics board provides a stable mounting platform for the gyroscope/receiver/antenna base and supports the tail boom holder. Using high-modulus carbon fiber sheet, with strong bending strength and anti-shrinkage strength, high-precision CNC single precision machining.
The advantage of locking the tail servo on the tail boom is that there is no need to adjust the length of the tail push rod, and it is easy to install and maintain. This tail servo mount is designed to prevent tail boom from slipping and to easily adjust belt tightness. Tail boom design up to 16MM in diameter reduces tail vibration.
The strong metal tail-box structure design can bring strong support to the tail-control system. The tail rotor holder is made of 6061T6 aluminum alloy CNC integrated molding. The three-bearing design lengthens the radial distance between the bearing and the shaft and effectively reduces lateral swing.
The tail control L-arm is injected with high-strength reinforced plastic materials and reinforced with multiple mortise and tenon joints to meet the stringent flight load requirements and effectively improve flight stability.
The AK420 has a first-class appearance level, high cost performance, extremely comfortable flight feel, and precision CNC machining allows it to obtain extremely low vibration value. This helicopter redefines the standard for helicopters in this class.