SB-21FH Nitro Pipe Set (O.S. Max 91 HR-Z Speed) by Hatori

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This is the Hatori SB-21FH Nitro Pipe Set. The SB-21FH has no pressure tap, and was developed for the OS 91 HR-Z 3D Speed to provide increased torque. When used with O.S. engines it is recommended that you tune your rotor speed and gear ratio to 11,000~14,500 rpm. This is also the preferred rpm range to use during heavy cyclic and collective loads during 3D flight, as torque will drop off after 15,000 rpm. 

This product was added to our catalog on October 24, 2011.

Richard Chin
Monday, Jun 1 2015 (about a year ago)
Hatori SB-21FH Nitro Pipe Set (O.S. Max 91 HR-Z Speed)
Fragile pipe, dents very easily unlike other pipes. Has a non existent warranty if the internals or seams break.