The Bottom Bracket Upgrade design provides an FEA-optimized, Aluminum 6061-T6 crossbar construction that prevents unwanted flex during high-torque maneuvers of both the helicopter lower frame section and the connected tail boom braces. Compatible with the T-Rex 500 Electric Series (E/GF/ESP) helicopters the new upgrade provides unprecedented strength in an ultralight design - weighing only 41 grams; and provides far greater protection and support of the carbon-frames in the event of a high-impact crash.

Material: Aluminum 6061-T6

Models: All ALIGN T-Rex 500 (E/GF/ESP) series (replaces stock ALIGN part #H50021).

Includes:

• One (1) T-Rex 500 Series Aluminum Bottom Bracket Upgrade
• Six (6) M2.5 x 0.45 x 10 mm Socket Head Cap Screws (Class 12.9)
• Two (2) M2.5 x 0.45 x 12 mm Socket Head Cap Screws (Class 12.9)
• Four (4) M2 x 0.4 x 10 mm Socket Head Cap Screws (Class 12.9)

Finish: Clear anodize, mirror-polish CNC gloss

Weight: 41 g (design is FEA optimized for maximum strength and minimum weight)

• AT500-BBU Installation Diagram (PDF)