Quasiturbine> Product> QT.6LSC Academic


Everything begins with know-how acquisition and tangible experiences...
Familiarization is the objective of the academic units.
Not for commercial use.

Quasiturbine QT.6LSC
(A 600 cc displacement per revolution engine)
Academic Pneumatic Partial Kit

This page is followed by the Academic Pneumatic Partial Kit Assembly Guide at:
www.quasiturbine.com/EProductQT75 SCAcademicGuide.htm

Sales for 790 US$ (see purchase order at the bottom of the page)

Note: It is possible to order a Kit
already completed and assembled for double the price.

We ship air freight worldwide.
(Custom exempted within North America NAFTA zone).

Instead of completing the kit,
some prefer to do their own interactive exhibit:

Quasiturbine Educational Demo - Pneumatic / Steam
Property of Promotions Pierre Cormier 


Academic Objectives

(The manufacturer encourages competitions, but does not organized them)

Qtv2-SCAnim2.gif (70956 bytes)

Spectacular Demonstration

These units have an academic - educational vocation, and consequently do not aim high standard of performance. Once supplemented and assembled, these pneumatic-academic units turn under the effect of compressed air or nitrogen at a pressure as low as 0,3 bar (5 psi) and must not exceed 500 RPM and/or 2 bars (30 psi) at the pressure gauge (Less than 1 HP flow-in). However, don't anticipate a perpetual loop motor-compressor - motor, nor to extract 1 HP out of a 1 HP compressor, this motor will not do this kind of magic ! To make a success of this project, it is preferable to have good knowledge in mechanics.

Quasiturbine QT.6LSC Pneumatic (once completed)
Usable with pressure from 1 to 30 psi (2 bar)!

Concordia University Experimental generator Video at:
Communiqué at:

A silencer may be suitable for some demonstrations.
Not be used as a reversible compressor.

Notice: This product is custom made and not yet in commercial production.
It is offer for institutional and corporate application researches and demonstrations
and is not intended at this time for private individual retail sale.
Among the new emerging technologies like
hybrids, hydrogen, fuel cell, PV solar, in-wheel motor, power windmill, nuclear thermal...
the Quasiturbine is by far the least expensive innovation to familiarize with!

Pneumatic Power

A positive displacement pneumatic motor can be ideally represented (case without truncating the intake) by a piston in an infinitely long cylinder, in which case the power is proportional to the product of the pressure time the flow.
(Attention: The flow rates use in the following equations are not normalized to the standard atmospheric pressure)

Power (HP) = Pressure (psi) X Vol.Flow (cfm) / 229        (cfm = cubic feet/min.)
                                               (As an example: 1 HP = 10 cfm at 22.9 psi)
or (1 m3 / min = 35.3 cfm):
Power (kW) = Pressure (bar) X Vol.Flow (m3/min) X 1.70
                                               (As an example: 1 kW = 0.294 m3/min at 2 bar)

QT.6LSC Vol.Flow = 0.6 litre X rpm (in litre/min) = 0.021 X rpm (in cfm)

If the intake pressure increases, the flow (rpm) increases also, such that generally the engine power increases as the square of the pressure.

Remember that there could be a significant difference between the pressure applied at the engine intake and the actual pressure into the engine chambers. Also, efficiency of all engines falls in the free spinning regime, where the torque load demand is too low (or rpm demand too high) to extract all the machine power. Furthermore, no engine is 100 % efficient. Conventional turbine or piston engines are driven by similar pressure-flow relation (case without truncating the intake).

Free spinning (no load) in the 0 to 800 rpm range of a well run-in unit is typically given by:

Free spinning (rpm) = 38 X Pressure (psi) = 570 X Pressure (bar)
(Maximum engine power is produced near half of the free spinning rpm)

Project Components

Not all the parts shown are provided in the partial kit. The academic basic parts (partial kit) is made of parts similar to those used in pre-commercial Quasiturbine QT.6LSC (previously QT75SC) Pneumatic models. The kit is a simplified version unit without lateral seal, leak proof is done only by tide rotor-wall proximity and by the lubricant used. All complicated components are provided. It does include a simplified differential and a central shaft. External engine size is about 19.8 cm (7 7/8 inches) in diameter by about 6.4 cm (2 1/2 inches) in thickness. The QT.6LSC (previously QT75SC) has been extensively developed and fairly tested.

(The QT.6LSC is similar to the QT50SC shown in this picture)
Not all the parts shown are provided in the partial kit.

Although functional, these sets of basic parts are not intended for commercial uses. They are not intended to produce useful power, nor for steam or hydraulic use. Well constructed and assembled, well lubricated and operated within the limits, these units can generally totalize several hundreds of hours without significant breakdown and/or wearing.

Included in the Kit

(The QT.6LSC is similar to the QT50SC shown in this picture)

What is included in the partial kit:

  • A set of 4 pivoting blades slightly oversized in thickness.

  • A steel stator housing slightly oversized in thickness, whose interior surface is already rectified and polished, and including 4 radial ports (two intakes and two exits, standard NPT 1/2").

  • A set of 4 slightly oversized contour seals and their associated springs
    (seals which have to be slightly rectified to accommodate the contour).

  • 4 roller cylindrical supports and 4 axes for the pivoting blades.

  • A suggested internet drawing to help make the lateral side covers (see the assembly guide).

  • An Internet Assembly Guide giving indicative instructions for assembly and construction at: www.quasiturbine.com/EProductQT75SCAcademicGuide.htm

NOT Included in the Kit

The central differential and the main shaft are not included neither,
but can be bought separately.
(The QT.6LSC is similar to the QT50SC shown in this picture)

What is NOT included in the kit:

  • Two lateral circular side covers including the tracks for the rollers supporting the pivoting blades.

  • 8 central rollers supporting the pivoting blades and their needle bearings.

  • The housing holding bolts.

  • Fittings to ports of admission and exhaust (compatible with NPT 1/2" standard).

  • Final correction, settings of dimension, selection of the tolerances, polishing, adjustments, assembly...

  • The foot for anchoring the engine to a table (essential to build one).

  • The tools, abrasive pastes and the facultative antifriction pastes.

  • The pin-hole pressure gauge, the tachometer and compressed air or nitrogen (neither the compressor, the bottle, nor the regulator).

  • The static or dynamic rotor balancing has not been verified.

  • Two central cross arms (not suitable as power takeoff).

  • Simplified central differential and the main shaft (available separately).

  • The in-line air accumulator (minimum 1 litre) nearby the engine intakes to attenuates the intake line perturbations.

Condition of Operation

It is the buyer and/or operator responsibility to comply
with all applicable national and local laws and rules,
including those on security and pressurized products.

  • It is the buyer and/or operator responsibility to comply with all applicable national and local laws and rules, including those on security and pressurized products.

  • Familiarize yourself well beforehand with the Quasiturbine technology (see the associated site at: www.quasiturbine.com ).

  • Intended for near ambient temperature intake air (be careful not to run a supply air compressor for a too long period, which could overheat the intake air).

  • For optimum performance, the feed line must be well balanced between the two intake ports, which must be done by ending the line passed the 2 T by an accumulator (buffer) tank (minimum 3 litres), on which the pressure gage can be located.

  • Always make it turns gradually (without abrupt acceleration).

  • In break-in phase, reposition the rotor away of a dead spot before each start, by turning the central shaft.

  • Always ensure that the rotor is adequately lubricated (pneumatic tool oil only). (Never use oil with additive like antifriction, because large air flow or steam oxidized the oil and precipitate the additives in glue like product fatal to the Quasiturbine operation).

  • Ensure that the hoses and fasteners (particularly the flexible ones) are of quality and well anchored.

  • Avoid intake flow restriction like low flow rate regulator or additional flexible air hose. Place a pressure gauge close to the engine intake or on the end of the line damper tank. Pressure at the gauge can be fixed by varying the hand ball valve opening.

  • It is recommended not to exceed 500 RPM and/or 2 bars (30 psi) at the pressure gauge (less than 1 HP flow-in). No free running at more than 20 psi, and for short period only.

  • Avoid flow restriction at exit.

  • The use of a tachometer (with magnetic pick up, like the one used on bicycle ?) is cheap and also recommended.

  • Once in use, the engine will progressively break-in and rotate better and better,
    periodically dismantlement may require little break-in every time...

  • Never exceed the recommended limits.

  • Intake air must be reasonably clean and near ambient temperature.

  • The unit should not be used in reverse as compressor.

  • Silencer could be used (not supplied) with some effect on efficiency.

  • Important - Do not pressurized the central area - Never plug the lateral side cover ventilation drain.

Safety Precautions

  • It is the buyer and/or operator responsibility to comply with all applicable national and local laws and rules, including those on security and pressurized products.

  • These units must be supplemented, assembled and operated under the constant supervision of qualified adults.

  • Anchor the unit well on a table before each start-up.

  • Never exceed the limits and suggested conditions of operation.

  • Wearing safety glasses, mask and fastened hair is recommended. Use ear plugs when noisy.

  • The demonstration room must be well ventilated.

  • Check the tightening of the bolts and adapters. Be wary of the rupture or the decoupling of any of the flexible hoses.

  • Have a distant valve at hand to cut the air flow (nitrogen) as needed. Never operate while alone.

  • Particularly during breaking-in under compressed air, it can happen that the rotor stops at a dead point, and refuses to turn when the pressure is applied. This situation is unstable and call for urgent pressure release. In absence of pressure, slightly turn the rotor with the central shaft and pressurize it again...

  • During the demonstration, nothing should approach the central zone of the rotor; make observations at a distance of 50 cm (20 po.) or more.

  • Always be careful, never run it alone et always keep a prompt hand on the intake pressure valve. Follow closely the instructions.

Remark on Pneumatic Efficiency

Unfortunately, most current compressors are not design for 20 - 60 psi output, which make them running at only a fraction of their nominal power when feeding a low pressure Quasiturbine. For this reason, compressor must generally be oversized to sustain experimentation, or the system must have an important air reservoir.

Remember that the Engine Power is proportional to the TORQUE time the RPM. Power is zero at maximum torque (because rpm is then zero), and Power is also zero at free spinning rpm (because the output torque is then zero). Maximum Engine Power is near midway, when the rpm is "half the free spinning rpm", and the torque "half the maximum zero rpm torque". Running in excess of "half the free spinning rpm" requires a high steam flow for little torque and power output, a non-efficient engine regime to avoid.

Engine are supply without intake synchronization valve or cut-off device (see www.quasiturbine.com/EProductQTCutOffValve.htm), which can be installed by the buyer looking for high efficiency overall system. An high efficiency pneumatic motor does not guaranty the high efficiency of the entire pneumatic system. All gas heat up during compression and cool down during relaxation. The cooling effect must not be under-estimated. As an example, a typical 200 bar (atm.) cylinder empty adiabatically (without thermalization to ambient temperature) gives at the end an air so cold that its volume is then a 1/4 of that of the air once back to the ambient temperature (isothermal relaxation). In those temperature conditions at the entrance of a pneumatic motor, the efficiency is catastrophically low and the lubricant solidified, increasing considerably the internal engine friction... Generally, the reversibility of the compression - relaxation cycle reduces with an increase in pressure, which favors for high efficiency consideration the use of the lowest design pressure possible. The measurement of the exhaust temperature gives generally a good indication of the efficiency, since the minimum of energy lost into the environment correspond to an exhaust temperature equal (neither inferior, nor superior) to the ambient temperature. This condition can be achieved by a slight heating (solar) of the gas before its entry into the pneumatic motor. Since the Quasiturbine rotates from pressure as low as 1/10 of atmosphere (bar) (one psi !), one understand why the Quasiturbine is so well adapted to high efficiency system... For high pressure drop (not allowed with the unit), an air heating coil would be necessary to prevent freezing of the oil within the Quasiturbine.

Sale Details


  • Sale and operation are restricted to adults only.

  • Sale priority goes to schools, colleges and universities.

  • Use for academic demonstration only (commercial modification is not suitable, nor recommended).

  • Pneumatic air-nitrogen only (less than 2 bar - 30 psi),
    no steam conversion attempt must be made (could be dangerous).

  • Intended for demonstration.

  • Additional parts of replacement can be ordered by kit owners.

  • The Assembly Guide suggests data and methods only as indication, and it is up to the purchaser to make sure that he understands well the steps and the details of the project.

  • To make a success of this project, it is necessary to have good knowledge in mechanics, machining and assembly techniques.

  • Note: It is possible to order a Kit already completed and assembled for double the price.


  • The Purchasers understand it is a prototype, and release the manufacturer and its associated parties from all responsibilities relative to the use.

  • Sold without tested specification.

  • Guaranty of the manufacturer is limited to the replacement of the defective parts.

  • The purchasers must have read the present page as part of the purchase order agreement and invoice, and declare themselves satisfied with it.

  • Sales done in Montréal, Québec Canada.

  • The present document and conditions must be transferred to the chain of future owners of the unit.

  • If there is intellectual property risk, the manufacturer can simply refund and not deliver.


  • The price includes the applicable local sale taxes if required, but not the shipping costs.

  • The insurances and customs fees are the responsibility of the purchaser.

  • As possible, shipping will be made in the 4 weeks following the reception of the deposit, or according to the production capability of the moment (to be notified when ordering).

  • Failure of the buyer to make final payment or take delivery of the unit within 3 months of the  notice of completion will be interpreted as an abandon of the product without compensation.

Purchase Order (PO) Form

Ordering a
Partial kit of Quasiturbine QT.6LSC academic
Add a note if you want to order a Kit
already completed and assembled for double the price.

To : Quasiturbine Tronçonneuses
Casier/Code/Porte 2804 - 3535 Papineau
Montréal Québec H2K4J9
514-527-8484  Fax: 514-527-9530
Associated website : www.quasiturbine.com

A partial Kit of academic
Quasiturbine model QT.6LSC Pneumatic
without the simplified central differential and main shaft
(available separately for 250 US$).
Not intended for useful energy production.
Mainly for academic purposes.
To be use only under competent supervision.
Guaranty is limited to the replacement of defective parts.

Sale done FOB Montréal, Québec Canada
Price including Canadian local sale taxes when applicable
but not the shipping and
custom fees (NAFTA Exempted? # 8413.81):          790 US$
Money rate conversion at http://fr.finance.yahoo.com/m3
(Note: It is possible to order a Kit
already completed and assembled for double the price.)

The web pages
www.quasiturbine.com/EProductQT75SCAcademic.htm and
are an integral part of the present purchase order
and constitute the terms and conditions accepted by the buyer.

          Authorized Officer                               Date: ______________

QT Owner Name: _________________________

Shipping address: _________________________


Phone: ______________________     Fax: _______________________



Package: For the complete and running unit (less for the kit parts)
Weight: 14 kg / 30 pounds.
Size: 30 cm X 30 cm X 26 cm height / 12 X 12 X 10 inches height.

Email to info@quasiturbine.com
An invoice will follows with payment instructions.

Assembly Guide

This page continues with the Academic Pneumatic Partial Kit Assembly Guide at:



(Manufacturer under a privileged QT-BLADES supply license agreement)
Casier/Code/Porte 2804, 3535 Ave Papineau, Montréal Québec H2K 4J9 CANADA
(514) 527-8484      Fax (514) 527-8484
Associated website www.quasiturbine.com   info@quasiturbine.com 

Subject to changes without notice - January 7, 2007