HeavyMetal PLUS - 7" Spec Racing Frame (Street League Approved)

The "PLUS" variant of our popular HeavyMetal frame is our most buget friendly high performance option... This purpose built Street League racing frame doesn't pretend to be anything else!!! Carbon fiber arms come together with powder coated A36 steel center plates giving this quad best in class size, durability, aerodynamics & center of gravity... Both HeavyMetal variants are compatible with OpenRacer Pods & Source One V3.0 Arms!!!

Flight Performance: In our experience PLUS frames fly well using standard racing PID tunes & offer several performance trade offs... 

Pros: improved straight line speed / acceleration, & improved triple corkscrew / barrel roll type maneuvers...

Cons: Reduced performance during Split-S / Hard 180° turns and high reverse airflow situations... 

(X-configuration HeavyMetal frames offer balanced race proven flight performance)...

In the Interest of science and learning: While doing R&D on the HeavyMetal PLUS we learned a few things ourselves at TurtleModeFPV... Turns out there have been several research studies done on PLUS vs. "X" drones ("X" is referred to as "CROSS" in the research)... Google searching the phrase "A Comparison Of Quadrotor Flight Configurations" will lead you to some heavy science papers... One take away was understanding with "X" frames Pitch, Roll & Yaw are decoupled from one another... On a PLUS configuration Yaw movement is coupled to both Pitch and Roll axis... A 2nd take away is that PLUS frames only use one motor for Pitch and Roll movement vs. "X" frames 2 motors... It was calculated that this causes a 30% reduction in authority... However, there is a counter argument that the longer lever arm on the Pitch and Roll axis of the PLUS frame partially negates that figure... There are also aerodynamic differences improving incoming air flow and other factors to consider... We'll let you sort out the rest!!!

Weight: 478 grams +/-3g

Specs: 294mm motor post to motor post laterally | Tru + (symmetrical arm spacing) | 6mm × 15.5mm Carbon Fiber Arms | 4.5mm Center Plates | 20mm × 20mm FC Mounting | 30mm × 30mm FC Mounting | 25.5mm × 25.5mm FC Mounting W/ Shared Arm Screw (Not Recommended)

Note: "PLUS" frames are NOT compatible with "Pro" Short Arms...

Included:

- HeavyMetal PLUS - Battery Plate - (1x)
- HeavyMetal PLUS - Stack Plate - (1x)
- HeavyMetal PLUS - 7" Spec Arms - (4x)
- HeavyMetal PLUS - Hardware Kit (1x)

Accessories: Downloadable For FREE @ https://www.thingiverse.com/turtlemodefpv/designs

Note: This design is part of the HeavyMetal PLUS - 7" Spec Frame open source project of which TurtleModeFPV is the originator and designer... .dxf, .stp & .stl Frame files available to download@  https://drive.google.com/drive/folders/10vLPVJuKY8PazuGRuKmR1o4qjKco5nj2

Additional Resources: 

TurtleModeFPV is an official frame sponsor of Street League Spec Drone Racing: See our frame and download custom Street League firmware @ https://streetleague.io/build-guide/