SpeedyBee Bee35 3.5-Inch Frame

The SpeedyBee Bee35 is a 3.5-inch cinewhoop frame engineered for smooth proximity flights and digital FPV systems. It uses a custom aluminium heatsink at the front to actively cool the DJI O3 Air Unit during extended flights, addressing the thermal shutdown that enclosed whoops are prone to.

Key features

• Aerospace-grade 7075-T aluminium front and base plates dissipate heat from the O3 or other 20-hole digital air units, with silicone damping to cut the lens "jelly" effect.
• Tough injection-moulded 3.5-inch prop guards with a built-in LED-strip groove for indoor safety and visibility.
• Flight stack mounting in 20x20, 25.5x25.5 and 30.5x30.5mm patterns, plus 20x20/25.5x25.5mm VTX mounting.
• Horizontal or vertical battery strap mounting, and a quick-release design needing only 6 screws to free the body and prop guard.

Specifications

• Wheelbase: 153mm
• Propeller size: 3.5 inches (90mm)
• Top plate thickness: 3.5mm; bottom plate thickness: 2mm
• Motor mounting: 12x12mm
• Camera spacing: 19mm, 20mm
• Weight: 138g

SpeedyBee recommends 1806, 2004 or 2006-class motors — 2500-3500KV on 4S or 1800-2300KV on 6S — making this frame a solid platform for a full-sized action camera or the DJI O3 for stabilised recording in tight spaces.