The Pegasus Thruster is considered top-of-the line for Scuba divers and is built to commercial specs. It is very expensive at $4000 U.S.
Here are the specs:
12 Volt High Torque DC Motor
- 35-45 Minute Continuous Run Time*
- -5.1lbs. Negative Buoyancy
- Submersible to 325 feet
- Anodized Aluminum Structure
- Double Sealed Housings
- NiMH Battery
- Conical Shroud
- Speed up to 170 Ft. per minute*
- approx. 35 lbs. Static Thrust
- Dimensions: L -23.5" x W-8.5" x H-8.5 Wet Plug Connectors
- <b>Battery Charger</b>
- Explosion Proof Design
- Meets New DOT Air Carrier Regulations 49 CFR Subchapters 171-175, "Shipment of Hazardous Materials" Guidelines
Below are the component weights:
- Battery 5 Lb 10 Oz
- Motor 5 Lb 8 Oz
- Bracket 1 Lb
- Switch 8 Oz
The Blue Robotics T200 is capable of 11 pounds thrust, roughly 1/3 of the Pegasus. The Pegasus claims a top speed for the SCUBA diver of 170 feet per minute, a little less than 2 miles per hour. Keep in mind the drag goes up as the square of speed, so to go just 1 mile per hour would require only 6 pounds of thrust. If you will only be diving in situations of less than 1 mile per hour current, and don't mind a quite slow acceleration from stop, the T200 will get the job done, sorta.
If it were me, I would use two T200’s, which will not drive up the cost very much. Building such a thruster pack for SCUBA diving would be a simple engineering task using Blue Robotics parts.
I’ll be glad to help.