I ordered two sets of CF blades like the ones shown here this morning. MAH called me to confirm and they will be here tomorrow. They have great customer sevice so far! They are distributed by MRC and RCHover.

Background


MAH is a Russian company specializing in composite radio controlled helicopter products. The company was founded by designers with ties to the Russian aerospace industry. They were involved with various composite technology development programs, one of them being related to high efficiency aircraft propulsion systems. Their professional experience and knowledge eventually merged with their interest in the radio control hobby. This brought about the beginning of what has now become a recognized name in the RC Helicopter community. As we all know, this hobby has benefited greatly by advances in technology. As the helicopters themselves became more capable, the level of flying also dramatically increased, especially in the 3D arena. More demands were placed on rotor systems, and MAH has continually been on the leading edge of innovation throughout.


DBK International is the United States based importer of the MAH product line, located in the New York metropolitan area. The president of DBK International, Dmitry Kupershmidt, is an avid radio control enthusiast with over five years of helicopter experience. Dmitry worked very closely with MAH to develop the Generation II product line. DBK International is proud to be the exclusive United States based source for consumers, distributors, and vendors, for this exciting new innovation in rotor blade design.


Product Line


MAH manufactures high quality composite rotor blades and flybar paddles for radio control helicopters. The MAH product line contains blades fitting the most commonly available helicopters – from micros through 90 size machines. MAH is also developing special application rotor blade systems for heavy lift machines, such as camera ships. In addition to main rotor blades, MAH also manufactures a complete line of high performance tail rotor blades. All MAH rotor blades are matched by center of gravity and overall weight. Refer to the following tables to see our current offerings.


Main Rotor Blade Design


MAH blades have always been well known for their appealing aesthetics. The trademark carbon fiber weave bordered by white gel-coat contributes to both form and function. Showcasing the black carbon fiber weave is an important finishing design goal. When static, the blade is quite attractive, yet when in motion the white gel-coat borders create a highly visible blade disc. This is very important from both an orientation and a safety standpoint.


MAH blades are designed with an emphasis on 3D flight performance. In order to achieve crisp and responsive flight characteristics the blades must resist span-wise flexing and twisting. Each blade is created with 6 layers of hand made carbon fiber laminate to satisfy this requirement. The interior structure of MAH main rotor blades consists of six primary components.


1. Bass wood root / bolt reinforcing insert in blade root

2. Fixed brass bushing inside bass wood to accept blade bolts

3. Balsa main spar

4. Balsa trailing edge spar

5. Lead weight, impregnated into carbon fiber laminate

6. Steel wire, attached to blade bolt structure and lead weight


MAH blades incorporate a revolutionary steel safety wire retention system. This assures a high level of safety in the event of a “structurally compromising impact,” better know as a crash. The wire substantially lowers the energy of a separated blade tip / lead weight assembly by tying the two structures together.


In addition to the above design features, MAH blades also feature “Dual Taper” technology. The blades are tapered along their chord as well as their airfoil cross sections, from root to tip. This design provides increased efficiency along the rotor blade span – optimized for 3D flight.

*Photos courtesy of Osterizer