Dreamer3000’s Weblog

Hekal Round Eng

Last updated Sunday   28 March 2014.

This page is about a real life- all ready built -three prototypes engines and actually ran. see below.

The site (patent) come from Egyptian engineer , and is by far the best  publicly shared Mathematical and Engineering calculation work ever done on / into circular engines.

Unfortunately the site is no longer ruining-available.

This engine only addresses the Mechanical conversion mechanism dogma and presents a solution.

Currently at 35% thermal efficiency and maximum theoretical 60% with normal metal and maximum theoretical 80% TH.

Lots of great comparison Charts Figures and Diagrams.

I have tried to locate it again and emailed the owner with not results so far.

sorry for the inconvenience, at least i kept some of the info from him.


I will try to explain each to the best of my knowledge. Each figure is set to medium size, to click on it to enlarge or to go to original website.

Direct Piston torque arm compare

The above Picture “Direct Piston torque Compare” shows how in Normal Reciprocating Piston Engine , the effective length of the torque arm is changeable and related to the crank angle twist (angle), resulting in the biggest loss of power, missing out on the Maximum/peak Gas pressure .Since the Effective Lenght of Tourqe Arm (ELTA) is Zero or a fraction of a hundred.

So when there is absolute maximum gas power there is no torque at all

Gas pressure PSI Tourqe Arm x (Piston Area)514 x Zero x 1.705 = Zero.

While in a Circular engine the Effective Lenght of Tourqe Arm (ELTA) is at complete and continuous or full length. resulting in full usage of the maximum peak of the gas pressure.

Gas pressure PSI Tourqe Arm x (Piston Area)

514 x .65 x 1.705 = 578.4

Since i am not good with units , i think it is Pound Per foot. but doesn’t matter the unit the point is the huge difference in out pot power . this is the same chart redone and pasted here.

I will try to post an excel sheet with graphs.

Here is a chart Called “Power Stroke tourqe” from the Inventore Reseearcher Professore Hekal him self.

As you can see there is a huge difference in power out put.
Also evident is the delay in power production from TDC or the Beginning of the Combustion , in both the Wankel (W.R.E) and Piston (P.E) engine, that is due to the fact that it is needed to have some angle value to start having an effective torque length arm .
while it is very clear that power generation start immediately with Combustion or with Maximum Gas pressure
generation in any Circular engine (H.R.E) or Complete torque engine.

This next image gives you a Break down and distribution of the power for a unit of Gasoline , explaining the diffidence between Circular engine and and Piston engine.
Using same amount of gas pressure. It also clear that it is the fault of the arm length. that is varying in both the Reciprocating Piston engine and in the Wankel eccentric rotary engine,  Resulting in that huge power loss or reduction.
While the Circular engines has a firm steady complete full length of torque arm.
This next  Table explains the many different attributes of both engines.
so many things to talk about here i right now have to leave it to your intelegance.

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