dpv.sub-gravity.comSub Gravity

DPVs Specificiations Here at SubGravity, we are constantly working to create the best gear possible. If our equipment isn’t better, we might as well not make it. When we first looked at launching our own line of DPVs, we had one rule: "Don’t make just another scooter". We looked at what was already available to consumers in the U.S., then expanded our search globally. During these months of intense research, it became very clear that there was already a scooter manufacturer with a design that was clearly above the rest- Bonex. We were so impressed by the German craftsmanship and engineering, we knew we had to bring them to the North and South American market. SubGravity DPVs, engineered by Bonex, are all about high performance and reliability in a compact package. These innovative scooters have been developed and tested extensively with these features in mind. Exploration dives are only possible when the equipment meets the demands of the project, is light and is 100% reliable. Simple operation as well as the easy handling makes diving in advanced environments safer and more enjoyable. State-of-the-art technologies such as lithium-manganese (LiMn) cells and modern servo technology are used in our DPVs. These features (along with many others) offer the safety and runtime that exploration divers expect from their high end equipment. Keep on scrolling and let us walk you from top to bottom! Warning : No person should attempt to operate, or use in any way, a diver propulsion vehicle (DPV or Scooter) without the proper training. Please read carefully and understand the instructions for use before using a SubGravity DPV for the first time. "Amazing how Bonex can pack that much punch in small package and keep up with speed and ride quality." Nose Locking System The locking system is located centrally in the nose. This dispenses with the need for housing snap catches. It is opened and closed quickly and reliably by releasing the central lock. Interior ventilation compensates for pressure fluctuations. When unlatched, it automatically balances internal and external pressure, meaning you never have to fight to close your scooter. Nose The nose is made of Delrin (or POM) for good impact strength. This takes hard knocks without lasting deformation even at low temperatures. This material grade is highly regarded for its impact strength. It also features the needed flexibility to, for example, absorb impacts even in a low temperature environment. At the same time it is strong enough, to avoid deformation. POM is used for the nose and various attachment parts. Weighting Comes out of the box perfectly weighted for fresh water. Easily adjust weighting and trim from fresh water to salt water with included weight. Weight plates are easily removed or added for on the fly weight changes (adding a camera and lighting system to the scooter for example). "Long story short, I love my Bonex from SubGravity !" Body / Internals Body The body "tube" is made of high performance carbon fiber. This not only offers an even, corrosion-resistant surface but is also extremely strong, while maintaining a low weight. For additional durability and strength, 2 internal layers of kevlar are used in conjunction with the carbon fiber. All carbon fiber models from SubGravity are rated to an impressive 200 m (656 ft). Internal Structure Remove the carbon tube, and industrial experience and expertise come to light. Sealed motors, cables, and connectors along with tested and proven battery technology all come together for a perfect blend of: Safety Performance Reliability Efficiency Balance Beauty (Bonus) Custom Brushless Servo Motor Brushless motors require that a controller be installed as well. Until now, the practice has been to externally wire a controller to the motor. While this does work and has for years, it introduces unnecessary clutter and complication to the overall design. The solution to this was obvious, integrate the controller into the motor itself! Seen here is the result of that idea, a fully sealed and integrated, brushless servo motor. We didn’t just make the motor cleaner and simpler, we made it more efficient too. The industry standard for motor efficiency is 92%. By designing a motor to specifically serve our underwater needs, we were able to bring our motors’ efficiency up to an astounding 96%. Higher efficiency means longer run times at higher speeds, with a much lower total weight. With the motor being fully sealed, we have reduced the risk of immediate failure and permanent damage due to flooding. Utilizing CAN Bus technology, the motor parameters and the battery are monitored to ensure sustained functioning of the Scooter. Thanks to the electronics integrated into the motor, the scooter monitors its motor temperatures at all times, allowing it to automatically reduce the speed output when heat levels get too high, preventing damage to the motor, and without the risk of sudden shutdown experienced on similar vehicles. Battery Technology The highlight of the SubGravity DPVs, engineered by Bonex, are the powerful servomotor and specially designed battery pack. The DPVs rely on tried and proven lithium manganese technology. Conventional DPVs normally use lead gel batteries, whereby two 12V blocks are assembled in series in a 24V unit. Although these packs are very robust, they are also very heavy and only have a short life. Our scooters operate with lithium manganese cells. These offer a high power density and also ensure long, trouble-free operation. After 500 charging cycles, the battery pack will still retain 80% capacity. Most divers will only reach this value after many years of use. The lithium cells have no memory effect and a very good self-discharge rate (less than 2%/month). They are safe in the case of any cell defects and insensitive to long periods of non-use. Features: LiMn power pack High power density Long life No memory effect Low self-discharge rate No danger of cell damage Capacity stability at low temperatures Power pack easy to remove "Everything worked as expected or even better." Safety Features Functional Safety An effective direct main switch is provided on all SubGravity scooters. This can be used to immediately switch off the drive in all diving situations. A soft start increases the operating safety by preventing abrupt movement. The power supply is increased temporarily when starting so that more thrust is available. This boost function can also be activated on the move and serves for maneuvering narrow openings with an increased current or starting up with heavy loads. The motor switches off immediately if an object gets caught in the propeller. The obstruction can be removed without danger and the dive continued. This cut-off protects both the operator and the entangled objects as well as the drive assembly of the Scooter. Emergency Bypass System Emergency operation is also possible by switching to a second, redundant control circuit. The emergency drive switch is part of its own circuit which maintains drive operation in the event of an electronic failure. Cave divers, in particular, appreciate this safety feature as in certain cases, the DPV is critical to a safe exit. Flood Tolerant All components of the DPVs are water-tight, and the electronic components have been additionally encapsulated. The SubGravity scooter, engineered by Bonex, will continue to operate even when water penetrates (partial flood). Should any problems arise, emergency operation is also possible by switching to a second, bypass control circuit. Prop Stop Feature Instead of a mechanical clutch, Bonex has developed an electronic cutoff for the safety of their divers. Were anything to impede the prop, it will automatically shut down. The diver can then safely remove the item (equipment, line etc), reset the DPV and continue on their way. Tail Aluminum Tail End The back is made of aluminum for stability and optimal heat dissipation. A hard anodising improves...