Online videos of the engine design including animations and early access snippets of interest are now available at you tube
Pioneer 3 Prototype Build Commences
Sunday, 16 September 2012
Final design specifications have been released for the 3rd generation Shepherd Engine. The following image provides a brief overview of a fully balanced two cylinder configuration. This is intended to verify the engines initial operational characterisitcs before we embark on exploring other configurations such as a four cylinder model.
The prototype is a two stroke with each cylinder being approximately 2.2Ltr resulting in a total engine size of 4.4Ltr. The stroke of the engine is 13cm. The overall diameter of the engine support sleeve is 30cm. The length of the engine, excluding the counter weight module and the planetary gears, is 90cm.
The engine mounts are visible on each side. In the centre of the engine we have provided a transparent section to the main support sleeve which shows the cam lobes and fixed cam followers which are attached to the engine support sleeve. Fuel hoses can be seen in green at each end, along with the air intakes and exhaust chambers which service each combustion chamber separately.
It is expected the engine will be producing test results in the next couple of months. Once we have independently verified the performance figures we will be able to start releasing videos and more detailed data about the engines design.
Next Generation Engine Promises Significant Innovation
Tuesday, 29 November 2011
Work on the next generation prototype is currently being finalised. A large number of significant innovations has resulted in dramatic reductions in size, part count and operational complexity. The freedom this revolutionary architecture offers us has resulted in further staggering innovation which will be explained after a new round of patents and intellectual property protection initiatives gets underway early in 2012. Analysis of the new engines design characteristics has given us great confidence that we are now in a position to finally start releasing this technology to the world.
We would like to thank the thousands of supporters that have given us encouragement, advice and goodwill over the last two years since we first revealed the engine to the world on this web site. Many of you have wanted to buy shares in our company but it was too soon as we were not 100% confident we had resolved all of the issues. With the release of the next generation design we are now fully confident. We have established proper commercial structures to administer and manage access to the technology by manufacturing organisations and to attract private equity funding. Enquiry from interested parties is welcome.
Field Trials in Hamilton
Wednesday, 11 November 2009
Initial Testing Results
Wednesday, 11 November 2009
Static torque tests have just been conducted with the engine. Measurements record 2200Nm of torque at 400 psi on the 1.8 Ltr prototype engine. At 1500 rpm this equates to around 228 Kw / 306 Hp of power.
From these tests a number of comparative analytical values can be calculated for the current engine configuration [ 2 x 866 CC cylinder two stroke/ 1500 RPM / 398 BMEP]: In particular for every litre of cylinder volume the engine is generating approximately 257 Kw of power and 2448 Nm of Torque.
These figures provide a first glimpse of the engines incredible potential and industry changing power and torque equations. Each of the two pistons is providing on average 2400 Nm of force which can be fully harvested over two thirds of the length of the power stroke.
Commercial Development Programme To Begin
Wednesday, 05 August 2009
The origin of the Shepherd Engine design is based around an entirely new architecture that of fixed pistons and a movable combustion sleeve. Shown here you can see the the combustion sleeve drive rollers coming out of slits cut out of the stationary housing holding the pistons. The drive rollers push against the sinusoidal slopes of the outer cam lobs converting linear motion into rotational motion with levers having a fixed length.
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