|
| Home Products
Accessories In Depth info Images Video Clips Testimonials Spare parts Users Manual Contact |
   The Magnus is the latest addition to the stable. Utilizing the latest in Lithium Polymer battery technology, advanced electronic speed controls, and a new 1000 watt motor, we have built a machine with a good and evil personality.... Speed/power, endurance and light weight: Yes, this baby has it all. Speeds approaching 300 ft/min with a single cylinder, over 250 feet/min with tech gear... this machine rocks. Runtimes up to 5 hours. Range up to 10 miles*. Only 52 llbs/24Kg. As with any vehicle, you must choose between speed and endurance. The beauty of the Magnus is you have more choices... go flat out for 50+ minutes on top speed, cruise around at 200 foot/min for 2 to 3 hours on cruise speed, or choose the power saving speed 1 and have your long burn times at slower speed. The Lithium Polymer battery pack (nickel, manganese, cobalt chemistry, which is safer than traditional Lithium/Cobalt) provides 950 watt/hours in small package. For comparison, this scooter has the same amount of stored energy as a UV-42!   ![[comparison table]](comparison%20table.JPG)  Simple, fast electronic speed control. 3 distinct speeds, you always know which speed you are running on... and your corresponding run times. To match speed with your buddies, simply adjust the mechanical pitch adjustment so that the team is all running at the same speed. The Magnus scooter has a relatively large brushless DC electric motor (BLDC ) motor. BLDC motors have been commercially available since 1962. Brushless motors differ in that they do not have brushes (carbon/copper contacts that transmit power to the motor windings). The elimination of the brushes reduces maintenance, which is important in motors under continuous operation... however as DPV's are used only sporadically, brushes rarely if ever need to be replaced in the Submerge brushed motor. Instead, we have chosen the BLDC motor as they are easier to obtain in the necessary size, and work well with modern, micro electronic speed controllers, which have only become readily available in the last 10 years. The Magnus is more powerful than our Submerge brushed motor. Most times, big motor beats a small motor, regardless of the method of control (brushes or electronic speed control). The Magnus is a little more efficient in the 200 ft/min range than our N-19 and UV scooters, and happens to have a motor which is about 10% heavier. Using thrust as a measure, the Magnus is not as efficient at full speed (~250 feet/min) as our brushed motor scooters are at full speed (~200 ft/min). Expressed as power in vs thrust... the Submerge brushed scooters produce about 50 lbs thrust with about 550 watts vs the Magnus brushless powered scooter at approx 70 lbs thrust and 1000 watts. Our brushed motor scooters (N-19, UV's) do not have a electronic speed control (ESC), so the motor RPM can not be controlled. As slow speed operation is seldom required for any significant period during a technical dive, this inefficiency can be overlooked. However, for the Magnus, an ESC is definitely required, as the added RPM/power makes it impossible use the variable pitch mechanism as the only speed control method (the props cavitate on anything less than pitch#5.. 200ft/min under full power operation). As a welcome, if marginally important side benefit, the use of the ESC allows the Magnus scooter to be 3 to 5 times more efficient at very slow speeds as compared to the N-19/UV scooters (at speeds equivalent to our N-19/UV scooters on pitch#1 to #3). Be careful of giving excessive regard to scooter range specifications. The max ranges achieved at slow speeds may have scientific or comparative value in rating the max range under the most extreme circumstances, but the range to be expected on a regular dive is half or less of the max possible figure. Look for the range at cruise speed as a more realistic performance indicator. The battery pack position within the hull is adjustable... no more finding the right position for the trim weights. Just add any necessary trim weights to the provided pocket in the nose cone (where it can't come loose and cause havoc), and move the pack position within the hull to effect trim changes. The Magnus is available for USD $6500. *With single cylinder. May require cylinder changes to achieve the 4 to 5 hour runtime. |
| Submerge Scooters. Jupiter, Florida USA. Phone 561 747 3640 submerge@silent-submersion.com |