Racing frames just like the Skystars Bolt5 or Foxeer Caesar prioritize gentle weight and aerodynamic effectivity for optimum velocity and maneuverability. Their geometry is optimized to have the smallest friction within the air, and the battery is mounted beneath the body to acquire the optimum heart of gravity (COG).
My evaluation refers back to the SkyStars-RC Bolt5 body equipment, however because the Foxeer Caesar V2 has only some minor variations, you’ll be able to count on about the identical outcomes from that equipment too. Aside from the “X” and “S” logos on the digicam mount, these two frames look an identical. Each are manufactured from high-quality T-700 carbon fiber and have a 3d-printed TPU shark fin on prime for turtle mode (flip again).
SkyStars-RC Bolt5 adopts a totally symmetrical TrueX body design that provides equal stability on all axes as the space between the rotors is equal. With a wheelbase of simply 200mm, it’s the smallest 5″ body that I examined.
Skystars Bolt5 body evaluation
Final 12 months, SkyStars-RC despatched me this Bolt5 body with the F722HD Professional+KM55 flight stack, and I forgot about it till final week once I wished to construct a brand new racing drone. The body equipment was nonetheless in its authentic bag, together with mounting screws, TPU components, and two battery straps.
The Bolt5 body consists of 4 5mm thick arms, a prime plate, and two backside plates. The arms are held collectively in a backside and center plate sandwich. There may be sufficient area between the 2 plates to stretch the LIPO strap. The underside plate has rubber padding for safer battery set up.
Mounting Choices
The digital components will be put in within the heart of the body utilizing a 20×20 mounting sample. On prime of the flight stack, there may be room for an analog VTX or a low-profile HD digital VTX, such because the Walksnail Avatar HD Professional. The arms are suitable with motors which have a 16x16mm (M3) mounting choice.
3D-printed TPU mounts
Skystars-RC included two kinds of digicam brackets. Each TPU mounts present an aggressive digicam angle wanted for racing competitions. The VTX antenna holder can accommodate solely super-small antennas with quick pigtails.
The shark fin in entrance isn’t just a cool design aspect but additionally useful for Turtle mode, permitting you to flip over if you happen to crash the other way up. Sadly, the fin has the drawback of constructing it unimaginable to put in a GoPro or different digicam for 4K recording on board. When it’s absolutely assembled, the body weighs about 75 grams.
Construct Suggestions
Regardless of that no documentation is offered, you’ll be able to assemble the Bolt 5 body in lower than quarter-hour. Keep in mind to make use of thread locker or thick viscous grease on the screws to stop loosening.
For electronics, think about using a flight stack and VTX (analog or digital) with a 20mm x 20mm mounting sample (30.5×30.5mm is not going to match!). I accomplished the Bolt5 (Caesar V2) race body with a MEPS flight stack (F7 FC + 45A ESC), SZ 2306 KV1750 motors, 350mW VTX, and an ELRS radio receiver.
Beneath the body is room for 4S with as much as 2000mAh or 6s with 1500mAh LIPO. To keep away from reducing the battery (energy) cable by the propellers, I counsel you tie it to one of many arms.
Technical parameters
Materials
Toray carbon fiber T-700
TPU components
Turtle fin, Digicam, and Antenna mounts
Diagonal dimension (wheelbase)
200mm
Configuration
TrueX
Thickness of the arm
5mm
Suitable props
5.1 inch
Flight stack mounting
20x20mm M3
Motor mounting
16x16mm M3
Digicam mount
Nano (14mm)
Body equipment weight
76 grams (together with TPU and screws)