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HD502 KIT INCLUDING 500MM MAIN-BLADES AND 80MM TAIL BLADES

HD502 REWORKED VERSION:
The HD502 stays a very attractive version to enter the fantastic world of HD Helicopters. HD has decided to optimize the existing HD500 further more. Next to an all new canopy made from HeliCenter Berlin in the same awesome quality as the HD750 version the new HD500 has a new battery quick release system based on the logic of the HD750.
The new canopy and the new battery quick release system is 100% compatible to the previous HD500 CELL version.

Based on a high-strength aluminum frame with optimized torsional stiffness and minimum weight the HD 502 CELL DBDS with its new Direct Belt Drive System sets standards in the 500 heli-class segment. Apart from a neat outer appearance the main development focus was on the construction of efficient yet weight-saving components.

It is for example possible to install a 48,9mm engine. The battery will be mounted upside down to enable an optimized center of gravity adjustment . The rotor head is a completely new design taking into consideration the latest trends on the market. A seperate swash locker arm will be available as an additional option. While focusing on the belt drive, the main objective was to ensure a very smooth and silent sound eliminating any noise like that originating from a traditional drive system. Precisely manufactured and light-weight aluminium belt wheels combined with a 18mm belt care for highest quality and silent operation. 3 bearing blocks for the main rotor shaft and a contra bearing on the engine ensure no loss of torque and maximum power on the main drive. A high innovative but simple belt-tension unit was designed to guarantee a perfectly tight tail belt under all conditions. The engine and ESC block features additional cooling ribs for a more efficient heat dissipation. Designed for 465mm up to 520mm blades the HD 502 CELL DBDS is perfect for extreme 3D but can also be flown with low RPM. It is the ultimate “toy” for all kind of pilots and leaves no wish open.

The goal of HD Helicopters is not to establish another typically known or existing helicopter model but to provide a brand new and high innovative design which will set and raise the bar in the market of helicopter models.

Technical data HD 502 CELL DBDS:
500 class optimized for 5-6s operation
Main blades: 500mm (included in the kit)
Rotor diameter with 500mm main blades: 1125mm
New Direct Belt Drive System with a 18mm belt and light weight aluminium wheels for smooth and silent operation
Take-Off weight ca. 1980 Gramm without batteries
Length: Ca. 970mm
Width: Ca. 140mm
Height: Ca. 295mm
Tail rotor: 220mm
Main rotor: Ø 10mm
Tail shaft: : Ø 4 mm
Main drive gear: 120T
Optional pinion 17T / 18T / 19T /
Drive gear ratio: 120T / 15 - 1 : 7,05 to 1:6,31
Tail gear ratio: 76T / 17T - 1 : 4,47
Integrated Tail Belt Tension System
Usage of 48,9mm engines possible (Pyro 600-09 L, Pyro 650-83 L, Scorpion HK 4020/4025 820kV)
Battery mounted upside down for an optimized center of gravity
Contra engine bearing and 3 bearing for the main rotor shaft

IMPORTANT NOTE:
If you plan to use a stronger motor like Pyro 650-83L or Scorpion 4025 please go for a lower kV between 800 and 830 and use the 19T pinion. With these powerful motors the motor-belt needs more teeth to run on to avoid early stripping.

For more information please feel free to contact HD Helicopters at info@hd-helicopters.com