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Quasiturbine QT.6LSC
Steam Engine

(2024 update - EIndex.htm)
We now have air/steam motors-expanders
1.5 and 12 kW in stock.

Published recently:
    -2023 Quasiturbine Fundamental of Internal Components
      Behavior and Detonation Flash Compression
      for Early Energy Recovery.
           En FRANÇAIS ICI
  1-2022 Quasiturbine High Power Density Engine
      with Displacement Exceeding External Volume
  2-2021 Quasiturbine Engine Stator Confinement Profile
      Computation and Analysis.
           En FRANÇAIS ICI
  3-2021 Quasiturbine - A Different take on...:5 min. Video
  4-2017 Quasiturbine Engine Replacement for Piston
  5-2015 Small QT Compressed Air Enegy Storage (CAES)
  6-2012 The Quasiturbine at the invention autopsy
  7-2001 (Book): La Quasiturbine écologique (286 pg)
  8-2000 TV Historical sub-titled : A 14 min. Video
  9-Here for more Technical QT Papers
10-Search Quasiturbine   GOOGLE   BING   YAHOO   in BOOKS

The Quasiturbine (Qurbine) is a « Positive Displacement » turbine alternative. suitable as a double-circuits Rotary Motor or Expander for compressed air, steam and other fluids, or (later) as an advanced Internal Combustion Rotary Engine, as well as (later) for Compressor of various thermodynamic cycles.
The Quasiturbine is a compact, low weight and high torque machine with top efficiency, specially in power modulation applications, like in aviation or for Drones propulsion.

QUASITURBINE Hand Rotation Test
QT5LSC (5 litres) Expander up to 12 kW under 4 bar (60 psi)

The Quasiturbine is a pistonless Rotary Machine using a deformable rotor whose blades (sides) are hinged at the vertices.
The volume enclosed between the blades of the rotor and the stator casing provides compression and expansion in a fashion similar to the familiar Wankel engine, but the hinging at the edges allows higher compression ratio and different time dependencies, while suppressing the Wankel rotor dead time and single rotor vibration, and this without the complex rotor synchronization gears.

At only 2 bar (30 psi). Power goes up with pressure...

This chainsaw is shown only as a sample
 of 1.5 kW QT engine application.
The chainsaw is not available for sale at this time.

For optimum efficiency and clean environment
under any load, torque, pressure, flow, power or RPM !

Quasiturbine MOTOR / EXPANDER suitable for AIR / GASES / STEAM
12 kW QT5LSC (5 litre displacement)    
and the    1.5 kW QT.6LSC (600 cc displacement)

 Pressure-flow energy conversion :
+/- 80 % of the perfect « single-stage theoretical expander ».
(Optimum all across the power range - No off-peak penalty)

At only 1 bar (15 psi). The 2011 Great Oregon Steam-Up

Air demo at only 1/4 bar (4 psi).

Fan demo at 4 psi (1/4 bar), too much torque for this strong man!

2003 APUQ à l'ÉTS vidéo 1:2 min.

2009 APUQ vidéo 1:2 min.
See also :

Quasiturbines Currently Manufactured
(Purchase order form on descriptive pages)

QT.6LSC Academic kit                                               discontinue US $
               (kit assembled and running)                           

QT.6LSC Pneumatic / Steam   1.5 kW                                  1900 US $

QT5LSC Pneumatic / Steam   12 kW                            6900 US $

QT40LSC Pneumatic / Steam  100 kW                           Later

For details and prices, see the
« PRODUCTS AVAILABLE » section in the left column.

Air freight available worldwide.
(Custom exempted within North America NAFTA zone).


Double reversible circuits and self-priming demonstration


(produit not offered)
Test bench made by a group of volunteers at
from an internal combustion engine block loaned par Quasiturbine.
Projet initiated and directed by
M. Claude Gratton, ex-pompier de Montréal.



Typical comparison:
Engine displacement
versus the Total engine volume

4 strokes engine type         Unit displacement         Engine volume

Piston                                    1                          15 to 25
Wankel                                   1                           10 to 15
Quasiturbine                            1                           1.5 to 5

The Quasiturbine is a positive displacement turbine
with a total displacement near the engine volume

(Imagine one day, a 3 litres car engine into a 3 litres volume!)

Follow us on:

Quasiturbine # 10 of the « very best clean energy technologies » !

Video of running Quasiturbine
ASME / IGTI 2007 Turbo Expo Conference

Quasiturbine has no vane

Unlike vane pumps, which vane extension is important and against which the pressure acts to generate the rotation, the Quasiturbine contour seals have an imperceptible extension and the rotation does not result from pressure against these seals. Since the cylindrical (or oval) stator of vane devices has a radius of curvature greater than the rotor, the two surfaces (rotor - stator) cannot reach a close fit at top dead center (TDC), while the surfaces of both the rotor and stator of the Quasiturbine fit exactly against one another to produce a high compression ratio. This is why QT is efficient (less pressure charging losses), and this is why there is no vane combustion engine. Quasiturbine publishes « efficiency data ».

Quasiturbine Explained Simply 

The Quasiturbine at the invention autopsy:
 A bibliographic overview prior to 2012
Youtube Video Channel

Homepage continues...
La Quasiturbine est une Machine Rotative à Losange Déformable (MRLD), Pulswer, MRLD, Ambert, gipa, génissieux  514-527-8484

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