• Kratos
  • Kratos
  • Kratos
  • Kratos
  • Kratos



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The Atmospheric Adventures Kratos is a pure racing machine. The designer, Bulbufet, originally set out to create an airframe that he wanted to fly and solves all of the major issues that he has had with existing options. The two primary concerns were (1) lowering the camera towards the ground while still protecting it against damage in crashes, and protecting the VTX from all possible damage that would be caused by an antenna taking a large hit. Beyond that, thinking about the Kratos as a racing machine, we decided to support 5” and 6” propellers, and develop it as a “stretch-x” quadcopter frame, which is the ultimate racing form-factor.


  • 4mm single plate. The struts both on front and back will help disperse impact that would cause breaks at the stem of the arm to send shock through both arms, preventing major damage to electronics or frame.
  • The “cow catcher” and back arm strut are removable and replaceable. You have the option to take them off. That being said, if you do run them and break them in a crash, you can easily drop a new strut in without the need to replace the entire frame.

6" Stance

  • By having a wider stance, pushing the props/motors out further, we create a more stable platform. The fulcrum of the lever that the motors have on the entire quadcopter frame is out further, and so each motor’s thrust has greater impact on the stability of the machine. This also gives you the option to run 6” propellers as well.

Camera Positioning

  • We’re dropping the camera down inside the bottom plate, so as to bring the pilot perspective further down in line with the COT (center of thrust), which gives the pilot a better sense of control and feel relative to where the airframe is in 3d space.
  • The camera is also nearly at ground level, which means that you are more aware of your height off the ground.
  • Camera mounting height can be lowered or raised more or less depending on pilots’ desired camera angle. 

Lower Top Plate

  • The standoffs are currently set at 25mm.
  • Lowering the center of mass lower into the thrustline creates a machine that flies on rails.


While all quadcopter frames are unique, this design was heavily influenced by elements of other frames on the market, and we just wanted to leave room to recognize the other designs. This market thrives on sharing of information and designs, and we want to make sure that the influencers are recognized.


  • Base Plate 4mm Thick - 64.3g
  • Back Cross Strut 4mm - 5g
  • Front Cow Catcher 4mm - 3.3g
  • Camera Side Plate 1.5mm - 1.5
  • VTX Mounting Plate 1.5mm - 1.6g
  • Antenna Holder 1.5mm 0.8g
  • Top Plate 1.5mm - 6.3g
  • Nuts/Screws/Standoffs 11.6g
  • Totatl Weight 95.1g


  • 1x Base Plate
  • 1x Back Cross Strut
  • 1x Front Cow Catcher
  • 2x Camera Side Plate
  • 1x VTX Mounting Plate
  • 1x Top Plate
  • 1x Atmo Simple PDB


Replacement Parts




Reviews (2)

2 reviews 3 out of 5
  • Chuck D. Dec 28, 2016
    Love how it flies, love the struts more than I thought I would
    I wasn't sure what I thought about the struts sticking out, it is great way to secure the antenna and protect the camera. After getting the Kratos (I had BulBufet himself build mine) I was really impressed with how sleek and centered the profile of the quad is and those struts were very strong feeling. I like how they can be removed, so depending on how you hit, you may only need to be replacing a small piece of CF. It flew amazing with the setup Paul had put on with the F60 motors and 5051 Racekraft props.
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  • Brent S. Dec 30, 2016
    I had high hopes but thats all it was.
    I just finished building the Kratos frame. I was in love with the ideas that Paul put together and it just looked like an all around winner. I can say this much I have only flown the frame once and that was it. She exploded after its maiden after hitting concrete from 50 ft up face first. I know what you are thinking well DUH its going to break something right? It didn't just break, both front arms completely broken off. The cam mount that's supposed to help protect the cam didn't help at all. The smile plate was missing and the cam shattered. The top and bottom plate both broke free from the standoffs. I have crashed plenty of frames in my FPV adventures this was BY FAR the worst damage I have ever seen in ANY of the 10+ frames I have purchased. I would leave a picture of the carnage up here but I cant. You can see it on my instagram if you like though infidel_fpv. I loved the ideas Paul just the stress of a crash in a uni-body this large is too much for it. If this was a unit where arms can be fitted to a bottom plate ill bet we are talking a new ball game then.
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This product was added to our catalog on Wednesday, November 02, 2016.