Neutral Axis Duct with Tandem Telescopic Thrust Vectoring Leading and Trailing Edge Propellers for Multi-Mode Spatial Vehicle [NADTVPMSV] is a single monocoque chassis frame for a multi-mode vehicle that can travel in all land, air, over water and under water as a perfect road vehicle, perfect flying machine, perfect speed boat and perfect submarine. NADTVPMSV comprising of a longitudinal and transverse ducts with tandem thrust vectoring leading and trailing edge propellers integrated with at least one concealed or non-concealed leading and trailing bidirectional edge thrust vectoring propeller propellers connected with shaft and power source like motor or engine for providing vertical, horizontal and angular thrust to monocoque chassis frame; retractable under chassis wings with single to multi directional fluid flow design, opening and closing mechanism to control the flight as well as to adapt according to mode of the vehicle; one or more wheel tires and suspension components for the vehicle with at least one steerable wheel to travel on surface; at least one ballast tank to submerge and manoeuvre the vehicle under water.

An amphibious vehicle, which enables wave making resistance upon traveling on water to be reduced and propulsive performance of its vehicle main body to be improved, is to be provided. An amphibious vehicle of the present invention includes: a vehicle main body that is movable on water and on land; a rear portion flap having a front end portion fixed to a rear portion of the vehicle main body; and end plates respectively provided at both side end portions of the rear portion flap.

An amphibious vehicle for traversing land and bodies of water includes a chassis, and a cycloidal propeller coupled to the chassis and which includes a plurality of cycloidal propeller blades rotatably coupled to the chassis and each extending parallel a rotational axis of the cycloidal propeller, and an extension/retraction system configured to extend the plurality of cycloidal propeller blades away from the chassis and to retract the plurality of cycloidal propeller blades towards the chassis.

The present invention provides a power train for an amphibian operable in land and marine modes. The power train including a prime mover, a first land propulsion device, a first marine propulsion device, and a speed change transmission, wherein the prime mover is arranged to drive the first land propulsion device via the speed change transmission in land mode, and at least a portion of the prime mover is located between the speed change transmission and a rearward most part of the amphibian, with the speed change transmission located spaced ahead of the prime mover by a selected distance using one or more drive shaft(s).

An Amphibious Vehicle (AV) is capable of planing with less power than prior similar size amphibious vehicles and using mostly off-the-shelf part. The AV uses an outdrive and propellor instead of a pump, and also include leading rear wheel well flaps which are spring biased forward against the hull bottom for on-road use, and pivot back to fill a gap between the hull and rear tire, reducing drag during in-water use. The combination of the propellor and wheel well flap allows planing with less horse power. An engine faces to the rear and either reversing differentials to reversing carrier and hubs provide correct wheel rotation. A reversing gear box attaches to an engine front and reverses rotation providing correct rotation for an outdrive and propellor.

A convertible ducted fan engine and mounting system. The convertible ducted fan engine has a shroud encircling a mechanical fan. The convertible ducted fan engine includes a fluid-propulsion configuration in which the mechanical fan rotates freely with respect to the shroud to produce thrust through fluid flow, and a drive-wheel configuration in which the shroud rotates about the rotational axis.

A human powered watercraft or land vehicle is described herein. A watercraft or land vehicle may have two pedals that reciprocated are in a linear or slightly curved trajectory but not a circular motion. As the two pedals are reciprocated, an output shaft is rotated in either a clockwise or counterclockwise direction when the left pedal is pushed forward or when the right pedal is pushed forward. The output shaft may be connected to a propeller of a watercraft or a land vehicle so as to propel the watercraft or land vehicle forward. The output shaft may receive rotational input through two gears mounted to the output shaft with one-way bearings that enable the output shaft to rotate in the same direction regardless of whether the left pedal or the right pedal is being pushed forward.

The embodiments disclose an amphibious vehicle system including a unibody, one-piece watertight buoyant body structure, filled with closed cell foam to create buoyancy in case of leakage, configured to carry at least one user and cargo, at least one motor drive system having at least one waterproof battery module, replaceable in a watertight compartment, coupled to the watertight buoyant body structure configured to drive at least one propulsion system to propel the amphibious vehicle on land, a twin hulled front portion segueing to a single rear hull housing the motor and differential with water channels to allow water flow to propeller, at least one boat propeller water propulsion system coupled to a pivoting self-contained motor configured to propel the amphibious vehicle through water, wherein the self-contained motor is configured to steer the amphibious vehicle in water, and a steering system configured to control wheels and propellers simultaneously.

A utility sled is formed from a lightweight material and includes a handle flexibly attached to the front end thereof. The handle includes a hook that is seated within a small opening of the utility sled when not in use. A pair of retractable wheels is attached to an exterior of each sidewall of the utility sled. The sidewalls are biased outward when no load is present. When loaded, the sidewalls advantageously tend to straighten vertically. The formed bottom of the sled includes a plurality of ribs which both add strength to the sled as well as function as sled runners when the wheels are retracted. The ribs operate to reduce friction between the sled bottom and the underlying surface.

An amphibious vehicle includes a vehicle body, a prime mover, a drive wheel, a water propulsion device, a drive wheel transmission, and a propulsion transmission. The drive wheel is disposed on a front side of the prime mover. The water propulsion device is disposed on a rear side of the prime mover. The drive wheel transmission is disposed on the front side of the prime mover and transmits power from the prime mover to the drive wheel. The propulsion transmission is disposed on the rear side of the prime mover and transmits the power from the prime mover to the water propulsion device.