Below are the 5 most recent journal entries recorded in careybeard1026's InsaneJournal:

Monday, October 3rd, 2011
4:44 pm	Volumetric Efficiency of a Rotary Motor Explained rotary 13b engine Compression 540º of crank rotation. Combustion 810º of crank rotation. Exhaust 1080º of crank rotation. </ul> In other words, it will take a rotary engine 1080º of crankshaft rotation to full an intake, compression, combustion & exhaust cycle. Or three crankshaft rotations for each cycle. A piston completes a single stroke every single 180º of crank rotation: Consumption 180º of crank rotation. Compression 360º of crank rotation. Combustion 540º of crank rotation. Exhaust 720º of crank rotation. A piston engine needs 720º of crankshaft rotation to complete a cycle. In other words, two total revolutions of the crankshaft. A rotor rotates @ one/3 of the rate of the crankshaft. In other words, for each and every one revolution of a rotor, the crankshaft has done three revolutions. For instance when the tachometer on a car signifies 9000rpms, 1 rotor is turning at 3000rpms. On two rotor engines, the front & rear rotors are offset 180º from every single other. A rotation of 360º of the crankshaft will provide the two rotors via the combustion stroke. Since each combustion chamber is -in the case of a 13B- 654cc, each and every 360º of crankshaft rotation will displace a total of 1308cc. In buy to interpolate the cycles and volume displaced by a rotary motor vs. a 4 aide engine, we can use the following logic: A piston engine will take 720º of crank rotation to complete a cycle. In a rotary motor, 720º will create 4 combustion strokes: 360º of crank rotation => 2 combustion strokes. 720º = 360º x two 720º of crank rotation => 4 combustion strokes. 4 strokes = 654cc x 4 four strokes = 2616cc For simplicity factors, we can stipulate that a 1.3L, two rotor rotary engine is equivalent to a 2.6L four aide, 4 stroke aide engine. It may possibly not be academically correct, but it is a comparatively easy way of visualizing how the rest of this write up and the formulas that are usually utilized to aide engines can be applied to a rotary motor. Additionally, applying the very same calculations utilized to determine Volumetric Effectiveness (VE) on a aide motor, but for a rotary motor will yield optimistic results. If we were to take into account the rotary motor, a 4 stroke motor with a displacement of 1.3L, the benefits would render a VE of around one hundred% in a lot more than one particular instance, which is really unrealistic. Did I make any feeling? Mmm perhaps not but, try to adhere to the up coming steps as I try to make perception out of what I have gathered so far. A tiny experiment... Properly, these days I eventually gave up and decided to do a little experiment that I located whilst looking for an useful technique to determine Volumetric Performance on a motor vehicle with out possessing to yank the engine from the car. I arrived across the following experiment: Calculating your cars volumetric effectiveness I will assume that you are both as well lazy or exhausted to stick to the hyperlink, so I will make clear a bit on what does the experiment entail. (Comment on this)
4:43 pm	rotary 13b engine rotary 13b engine </ul> In other words, it takes a rotary engine 1080º of crankshaft rotation to full an consumption, compression, combustion & exhaust cycle. Or 3 crankshaft rotations per cycle. A piston completes one particular stroke each 180º of crank rotation: Intake 180º of crank rotation. Compression 360º of crank rotation. Combustion 540º of crank rotation. Exhaust 720º of crank rotation. A piston motor requires 720º of crankshaft rotation to total a cycle. In other words, 2 comprehensive revolutions of the crankshaft. A rotor rotates @ 1/3 of the rate of the crankshaft. In other words, for each one revolution of a rotor, the crankshaft has accomplished 3 revolutions. For illustration when the tachometer on a car implies 9000rpms, one rotor is turning at 3000rpms. On two rotor engines, the front & rear rotors are offset 180º from each other. This is ended up the engine is rated to create peak torque, for that reason its safe to presume that VE will peak at or close by 5500rpms. Additionally, you can safely believe that Volumetric Effectiveness plotted against motor pace will mimic the shape and attributes of the torque curve produced by the motor. Notice that the plotted VE is relatively linear: will start @ 80% and climbs its way to a tad over one hundred%. If this experiment's outcomes could be validated and the parameters I utilised were precise, it would signify that the Renesis engine -on my automobile at minimum- is in simple fact extremely productive for a usually aspirated inner combustion powerplant -VE definition above. Calculating Volumetric Performance (VE) for the Renesis (13B MSP) rotary motor: We will use the subsequent values obtained in the course of our info log: Knowledge: Consumption Air Temperature (IAT) = 82ºF Engine Pace (RPM) = 8561rpm AirFlow (MAF) = 27.3lb/minute THEORETICAL AIRFLOW CALCULATION: Method: [(ED) x (rpm) x (VE)] / [(ES) x (C)] = TAF Variables: ED = Motor Displacement [in³] rpm = Engine Speed [RPMs] VE = Volumetric Performance [%] ES = Engine Stroke Coefficient [#] C = Conversion coefficient from in³ to ft³ TAF = Theoretical Air Movement [ft³] Solving: [(159.64in³) x (8561rpm) x (1)] / [(2) x (1728 in³/ft³)] = TAF TAF = 395.42ft³ Values: ED = two.6 Liters (1308cc x two) >> 159.64in³ rpm = I selected 8561rpm arbitrarily. VE = Because this corresponds to Theoretical VE, we presume VE = a hundred% (1) ES = Because we simplify a 13B motor to a four stroke piston engine -as a result two.6L- we use a coefficient of two. Do = 1728in³/ft³ AIR DENSITY & TEMPERATURE CALCULATION: Formulation: [(t1) / (t2)] = [(d2) / (d1)] Variables: t1 = Temperature of air for a recognized density [ºR] t2 = Temperature of the consumption air measured by the IAT sensor [ºR] d1 = Density of air for a recognized temperature [lb/ft³] d2 = Density of the consumption air [lb/ft³] Solving for [d2]: [(t1) / (t2)] x (d1) = (d2) [(491.67ºR) / (541.67ºR)] x (.0808lb/ft³) = d2 d2 = .073341lb/ft³ Values: t1 = 32ºF >> 491.67ºR t2 = 82ºF >> 541.67ºR d1 = .0808lb/ft³ VOLUMETRIC Circulation Rate CALCULATION: Method: [(MF) / (d2)] = AVF Variables: MF = Mass Movement charge taken from CANScan [lb/minute] d2 = Density of the consumption air [lb/ft³] AVF = Real Volumetric Flowrate [ft³/moment] Fixing: (Comment on this)
4:23 pm	rotary 13b engine rotary 13b engine The 2010 Mazda RX-eight is a great small powerhouse with an inexpensive price tag. In fact, U.S. Information and Globe Report lately ranked it as one of the 5 most cost-effective passe-temps automobiles for your cash. So what about the motor of this beauty? The 2010 Mazda RX-8 has a rotary motor, which the technological innovation is called RENESIS, and it is obtainable as possibly a 232-hp six-speed guide or 212-hp six-pace activity automatic transmission. The RENESIS rotary motor is the subsequent era of rotary motor that driven the RX-seven, retaining the electricity of the previous rotary design 13B-REW, keeping onto all the electricity of the RX-seven, while rising fuel economic climate and minimizing emissions, while the rotors weigh about 14% significantly less than the kinds used in the engine of the RX-7. The RENESIS motor also has its consumption and exhaust ports in the aspect housings, which enables far better heat dissipation and a more time electrical power stroke. RENESIS also passe-temps a six port induction method, named 6PI. Each and every rotor makes use of 3 of the ports, and every single also makes use of a variable intake timing mechanism, which allows it to increase compression effectiveness at equally higher and very low speeds. In addition, the RENESIS has two exhaust ports for every single rotor. This allows a enormous reduction in exhaust resistance. The two the automatic and guide versions have a 1.3 liter, two rotor rotary engine, able of 159 lb-ft of torque at 5500 rpms and are capable of a displacement of 1308 cc and a compression ratio of ten.: one, getting positive you'll get a whole lot of electricity for your dollar. The fuel economy is enhanced from the RX-7 as nicely... this car averages 16 mpg in the town and 22-23 on the freeway (23 for the activity automatic, 22 for the manual transmission). In conclusion, the motor of an RX-8 is a nice piece of machinery, and if you consider treatment of it, it will take care of you for a long time to arrive. (Comment on this)
4:16 pm	Mazda 16x - The Potential of the Rotary Motor rotary 13b engine The Mazda RX2, Mazda RX3, Mazda RX4, Mazda RX7 and now Mazda RX8 are all examples of productive rotary engine sports activities vehicles. The New Mazda 16x Rotary Engine must more popularize this offbeat combustion engine which capabilities (as rotaries often have) a compact design with an extraordinary electrical power-to-bodyweight ratio all in just 1.6 Liters. Mazda is calling this new rotary motor the "long-stroke rotary engine." As you may possibly already know, the 13B rotary motor has a displacement of just 1300cc, which is 1.three Liters. While the Mazda 16x has an motor displacement of 1600cc (800cc x two), which is one.6 Liters and even though they've made the 16x drastically larger than the 13B - it weighs less than a 13B. This is due to aluminum aspect housings, which Mazda states shouldn't scare us. Mazda's purpose here is "greater thermal efficiency" - which essentially implies, any vehicle powered by the Mazda 16x is going to shift like stink. Mazda says this [thermal effectiveness] will boost torque at all engine speeds. (Rotary engines are notorious for obtaining lower torque, specially on the lower-conclude.) They've also additional Immediate Fuel Injection so you can assume the 16x to be considerably a lot more affordable compared to rotaries of the prior. Unsafe emissions will be tremendously reduced as effectively and energy ought to be marginally enhanced compared to frequent multi-level fuel injected rotaries such as the 13B. This ought to lean the fuel-air combination out as effectively and could boost the rotaries nasty habit of flooding each time you move her down the road a block. Mazda has done amazing items with their light and sporty one.three Liter 13B - just visualize what they can do with this new Mazda 16x! Better yet, just envision what you could do with this new Mazda 16x rotary engine! Sadly, nonetheless, Mazda has but to announce a manufacturing motor vehicle to carry the 16x. The closest we've gotten is the Mazda Taiki, a far-out prototype produced by Mazda below the "Nagare"(which is, Japanese for "flow") idea of design and style. So when will we see this new rotary engine in motion? Numerous anticipated this new rotary engine to seem in the 2009 Mazda RX8, but when the cover was pulled off at the North American Global Vehicle Present in Detroit, we saw nothing but the Mazda 13B MSP Renesis engine beneath it's glimmering hood. To answer the issue your guess is as very good as mine. (Comment on this)
4:07 pm	Mazda Generates the Economical Jeu Auto the 2010 RX-8 rotary 13b engine The 2010 Mazda RX-eight is a good minor powerhouse with an economical price tag. In fact, U.S. News and Earth Report just lately ranked it as one of the 5 most affordable jeu cars for your money. So what about the engine of this beauty? The 2010 Mazda RX-8 has a rotary motor, which the engineering is known as RENESIS, and it is offered as either a 232-hp 6-velocity manual or 212-hp 6-pace activity automatic transmission. The RENESIS rotary motor is the following generation of rotary motor that driven the RX-7, retaining the electricity of the previous rotary product 13B-REW, keeping onto all the energy of the RX-seven, while increasing fuel economic climate and decreasing emissions, even though the rotors weigh about 14% less than the types employed in the engine of the RX-seven. The RENESIS motor also has its intake and exhaust ports in the facet housings, which permits far better heat dissipation and a extended electrical power stroke. RENESIS also jeu a six port induction program, referred to as 6PI. Every single rotor makes use of 3 of the ports, and every also utilizes a variable intake timing mechanism, which enables it to increase compression efficiency at both large and low speeds. In addition, the RENESIS has two exhaust ports for each rotor. This permits a huge reduction in exhaust resistance. Each the automatic and handbook models have a one.three liter, 2 rotor rotary engine, able of 159 lb-ft of torque at 5500 rpms and are capable of a displacement of 1308 cc and a compression ratio of 10.: one, getting sure you'll get a whole lot of electricity for your dollar. The fuel economic system is enhanced from the RX-seven as nicely... this auto averages 16 mpg in the town and 22-23 on the freeway (23 for the sport automated, 22 for the manual transmission). In conclusion, the engine of an RX-eight is a good piece of machinery, and if you just take treatment of it, it will get treatment of you for decades to appear. (Comment on this)