Rekon 4 FR Freestyle Frame Kit 4 Inches Frame

This is the Rekon 4 FR Freestyle Frame. We have recently seen a lot of 4″ frames that were geared up for long range flight, it’s great to see a practical 4″ frame designed to be used in a 4″ freestyle configuration.

Dave C the designer of the Rekon line-up shares his thoughts about this frame and it’s possible use.

the design

I developed the Rekon 4 FR to create a sub 250g freestyle platform that gests as close as possible to a “classic” five-inch quad. And while performance was the main objective, I still wanted it to be practical for everyday use:

– A robust frame with quick swap arms that can take hard crashes and offers good component protection.

– The option to carry light HD cameras (Naked GoPro, SMO, Insta 360).

– Compatibility with a widely available battery sized (650-850mah 4S).

– And finally, have some margin towards the sub 250g goal, so you do not have to worry about every gram of wire or tape you add to your build (if you are choosing the frame kit instead of the BNF).

     why 4 inch?

1. A 4” platform can be built sub 250g pretty comfortably and you will be able to carry a relatively large battery for 4-6min of aggressive freestyle. The disc load is lower than on a sub 250g 5”, making it less floaty and having more momentum when you “throw” the quad during freestyle tricks.
2. A 4” quad can carry a naked GoPro type camera easily and without a noticeable impact on flight performance. The analogue version is still sub 250 with a 25g naked GoPro and a 650mah 4S (unfortunately the digital version is not since the vista adds around 14g)
3. 4” t-mount props have gotten pretty mainstream and there is a decent choice and availability (which is not the case for 3.5”)

  motor & prop choice

The motor and propeller configuration was crucial to achieving the desired flight characteristics. After weeks of testing, I finally settled for an intermediate stator size with an aggressive kV. A stator larger than 1804 (e.g. 1606, 2004, 2204) didn’t seem to offer any noticeable improvement of flight characteristics while adding a significant amount of weight. Anything smaller than 1804 just did not have enough torque to make the quad feel locked and snappy enough.

The best performing props were the Gemfan 4023 tribades. They are more on the aggressive side in comparison to the HQ T4x2x3 and while they can be pretty amp hungry on the relatively high kV 1804 motors, they ensure the quad has an impressive punch!

Product Information

Feature:

• Support (20×20-25.5×25.5mm) mounting holes;
• Supports AIO/stack installation at the same time, ultra-light and lasts super long in flying.

• Brand Name: Rekon
• Model:Rekon4 FR Freestyle Frame
• Material:3K Carbon Fiber
• Type:4″ frame
• Wheelbase:180mm
• size:180*140mm
• Top plate thickness:1.5mm
• Bottom plate thickness:1.5mm
• Middle plate thickness:1.5mm
• Arm thickness:4mm
• Space of top and middle plate:20mm
• Motor mounting hole:∅9-12
• Installation holes:20x20mm/25.5×25.5 mm
• Support camera:19*19mm
• Weight:52.2g

• Package Includes
• 1x 1.5mm top plate
• 1x 1.5mm bottom plate
• 1x 1.5mm middle plate
• 2x 1.5mm camera side plate
• 4x 4mm Machine arm
• 2x M2*25mm Black mesh aluminium columns
• 6x M2*20mm Black mesh aluminium columns
• 5x Round head screws M3*20
• 4x Head cap screws M2*20
• 4x Cup head screws M2*12
• 4x Cup head screws M2*9
• 12x Round head screws M2*6
• 2x Round head screw M2*4
• 5x M3 Self-tightening nuts
• 4x M2 Self-tightening nuts
• 8x M3*6.6 shock-absorption balls
• 4x M2*4 shock-absorption Standoffs
• 2x Battery straps 15x200mm
• 1x Battery Anti-slip pad
• 1x TPU SMA antenna base
• 1x TPU antenna base
• 1x TPU GoPro fixing bracket
• 1x TPU Naked Gopro mount
• 1x TPU T-shape antenna fixing mount

Recommended Parts:( Not Included )

• Flight Controller:Zeus25/ZeusF722 mini
• Motor:14XX/16XX/18XX
• ESC:25A-40A
• Camera:19X19mm
• Propeller:4 Inches

More Information

• Rekon Website