Jet Propulsion Flying Jet Ski Engine Power Pack MauiH2o
How it works
Unlike conventional aircrafts and jetpacks, the innovative Jetlev concept greatly improves thrust-to-weight ratio by locating the propulsion engine, fuel and related systems on a separate vessel tethered behind the jetpack, and uses water as the jet propulsion medium because its high density can carry vast amounts of power at much lower velocities, and generate nozzle reaction forces much more effectively, than gases. The Jetlev’s design and development was guided by six important principles:
Extensive research and test results helped us develop many safety features and “best practice” operating procedures. Although falling from height or at speed is inherently risky, from our experience falling from the JETLEV-FLYER is rare, and platform diving from 10 meters has been widely practiced for over a century with excellent safety records. Central to our safety design is using water as a safety net and enforcing low flight ceilings by restricting hose length. The jetpack’s 5-point quick-release harness, protective back rest and head support, safety saddle and inherent floatation are just some of the many other safety features.
Inherent stability and effortless control:
Even though the jetpack can generate upwards of 500 lbf (2.250 N) of thrust for lift and propulsion, the flight controls are isolated from that thrust and only take a few ounces of effort to adjust.
Flexible supply hose/tether:
A flexible water supply hose delivers power to the jetpack with pressurized water. It also serves as the tether, enforces a flight ceiling, discourages the pilot from flying over land, acts as a stabilizer, dampens vibrations, and maintains forward heading stability of the jetpack in flight.
High power-to-weight ratio:
Traditional designs of airplanes suffer from low thrust-to-weight ratios which limit their performance and agility. Even F/A-18 E/F fighter jets can barely overcome the force of gravity. To achieve a dramatic improvement in this ratio, we decided to locate the propulsion source on a separate boat-like unit, and transmit low pressure, high flow water to the jetpack through a supply hose and generate thrusts by nozzle reaction force.
We decided at the outset that jetpacks are not practical for commuting and should primarily be designed for recreation including short term rentals. For that purpose, they must also be very simple to learn and operate. Intuitive flight controls, inherent stability, and an effective training system means that most student pilots can learn to fly solo within a few minutes of in-water instructions.
Simple, intuitive flight controls:
Fly-by-wire digital throttle control; nozzles angles determine allocation of thrust between lift and propulsion (forward, neutral or reverse); differential nozzle deflection generates yaw moments; and weight shifting from side-to-side generates roll moments.
- Jetpack dimensions, with adjustable seat and adjustable control arms: 100cm x 100cm
- Jetpack dry weight (approx.): 16 kg
- Maximum Thrust: 2.250 N
- Thrust-to-weight ratio at take off 85 kg pilot: 2.5 : 1
- Boat length: 3,20 m
- Boat beam: 1,20 m
- Boat height with hatches closed: 75 cm
- Boat weight dry: 280 kg
- Engine: 4-stroke cycle marine engine
- Engine HP (approx.): 250 HP at 6.800 RPM JF 250 model
- Engine cooling system: Closed loop cooling with stainless steel internal heat exchanger
- Hose dimensions: 10 m L x 10 cm diameter
- Flight ceiling (measured at feet level): 8.5 m
- Measured top speed with a 100 kg pilot : 47 km/h
- Fuel capacity: 57 L
- Duration at open throttle up to 2 hours
- Duration at cruising speed up to 3 hours
The smoothness, stability, control, performance and ease-of-use surpassed even our wildest expectations. Once you try the Jetlev-Flyer, you will appreciate why we are so excited over the results. Key features of the carbon fibre production model :
Only one model with a 250 HP engine will be available initially.All metals used will be made of either stainless steel or hard coat anodized aluminum with Teflon coating to protect it against corrosion and abrasion. Hard coat anodizing has the equivalent hardness of sapphires, the second hardest natural material known to man behind diamonds.
Every part of the Jetlev is painstakingly made with great precision. All water seals are made with the same high grade O-ring systems that one would find in deep sea systems. Critical cables are protected by tough braided sleeves, and electronic control modules and cable terminations are encapsulated in tough polyurethane plastics to keep moisture out. No expense is spared to make the Jetlev system as reliable and low maintenance as possible.