RC Crazed Slim Phast 4"

RC Crazed Slim Phast 4"
$44.99  $33.74 
Manufacturer : RC Crazed
Available Options:
Choose a 3D Parts Color:
Add a Shark Fin:
Add a 2nd set of stock 3d parts:
Add arm protector paws:
Tell us your micro cam lens size:
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Slim Phast 4" Spare Parts Click Here - Slim Phast 4" 3D Parts Click Here

The RC Crazed Slim Phast is a purpose built racing frame and this new 4" model is no different.  It is light, strong, and feature packed. We designed the 4" variant around a 20x20mm stack to make it much smaller in the center section.  This gives you a very proportinal looking model with 1407 motors and 4" props. This frame is also designed around the RunCam Micro Swift FPV camera.  Full-size and mini cameras will work but you won't have the same degree of protection for your FPV camera.  This thing is very rigid and sports 4mm thick arms that are 10mm wide which are a good fit for some small 20A ESCs.  The arms are wide enough so that they don't turn in to rubber bands from the torque twisting produced by powerful motors and thick enough to crash and crash and keep on flying.  The main plate is 3mm thick and the top plate is 2mm thick. There is a slight stretch to the frame and the MTM comes in at 180mm.  We went through several prototype revisions to find the right balance of weight, strength and flight characteristics just like we did with our 5" model.  The Slim Phast 4 is designed around a 20x20mm stack and has M3 holes for the stack mount.  We include a set of our M3 to M2 adapters if you want to adapt the M2 to fit snugly in the M3 holes.

Our local Cleveland Quad Squad pilots really put this frame to the test and we kept refining it, a little longer here, a little wider there, a little thinner here and the result is pretty awesome!  We include loads of 3d printed parts to complete the package including camera mounts, a micro swift protector, a top plate mounted camera bumper, and a rear standoff mounted VTX and RX antenna mount.  We include all these parts in green but you can add a second set of parts in other colors as well as some other cool add ons like a GoPro Session mount, arm protector paws, a lens adapter ring for the RunCam Micro Swift with 2.3mm lens, and a single layer stack mount that holds an XM+ and a VTX03 perfectly!

3D Printed Parts you can print yourself: https://www.thingiverse.com/tekyguy/collections/slim-phast


  • Weight: 63g with all of the included hardware and 3d parts - 56.4g with all of the included hardware and no 3d parts
  • 20x20mm stack supported
  • Compatible with 14XX motors
  • 4" propellers
  • 3mm thick main plate
  • 2mm thick top plate
  • 4mm thick and 10mm wide arms
  • MTM distance is: 180mm
  • Designed for the RunCam Micro Swift, but works with most cams
  • Comes with all kinds of 3d printed goodies


  • 1 x 3mm main plate
  • 5 x 4mm arms (one spare included)
  • 1 x 2mm skinny top plate
  • 4 x M3x16mm steel bolts (inner most arm bolt)
  • 4 x M3x12mm steel bolts (outer most arm bolt)
  • 4 x M3x6mm steel bolts (top plate)
  • 4 x 20mm aluminum standoffs (inner most arm bolt)
  • 4 x M3 Flanged nylock nuts (outer most arm bolt)
  • 4 x M3 nylock nuts (inner most arm bolt between the arm and standoff)
  • 4 x M3 to M2 stack mount adapters
  • Camera standoff mounts
  • RunCam Micro Swift protective cover for 2.1mm
  • Camera guard bumper
  • VTX and RX antenna mount
  • Battery Strap

Option Parts

  • Add a 2nd set of stock 3d parts: This will get you the camera cover, camera mounts, VTX/RC antenna mount, and the top plate bumper as a set in the color of your choice
  • Add a Shark Fin: These are mounted with the 4 top plate bolts and really help with Turtle/Quopa mode by keeping two of your props off the ground and up out of the grass for easy self righting
  • Add arm protector paws: These guards will protect your arm ends and can be flipped around to double as motor soft mounts


Build Video (4" goes together the same as a 5"):


Post your build using this product to RotorBuilds.com and it will show up here!  Awesome :-)

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