Engine Definition and 999 Threads

Had this idea today in my garage when I was setting up timing marks on the crankshafts and flexplate,the front engines flexplate would not be spinning the transmission.The flexplate is 14 inch diameter could you weld a series of fan blades to the flywheel face, get a modified bellhousing create...

got a twin ls1 standing mile car project I've been toying with for a while.My question is the engines have beeen fit in the engine bay with the rear motor having minimal setback to allow room for the front engine,the total weight for both engines is 760 lbs,half of that weight is ahead of the...

Homework Statement So suppose there is a chemical rocket operating in the vacuum of space (assume it's a perfect vacuum). It generates a hot gas with a total enthalpy of h. What's the final speed of the rocket exhaust, in terms of h? Homework Equations The energy equation seems to be useful...

Would it be possible to couple and electric motor to gas engine in series so both would increase the overall power.I currently building a twin engine car with two gas engines coupled together crank to crank like the old school twin dragsters.I would like to connect a large D.C. Motor in front of...

https://www.sciencedaily.com/releases/2016/09/160929161628.htm Return trips to Mars without refueling could be a step closer, thanks to a unique new thruster technology.

Homework Statement An elevator is running upwards at the constant speed v. The magnitude of opposing forces is F_o. The elevator's mass is m and the voltage is V Find the magnitude current in the elevator's engine. 2. The attempt at a solution I tried to solve this task by energy equations...

Homework Statement Im working on the following problem and could need some help in answering them: Work is being produced from a cycle. In order to produce this work, energy is being taking from a high temperature sources at a ratio of 1000 kJ/kg and the extra energy is being deliver to a...

Now I'm aware of how at around 300 degrees C N2O breaks apart, resulting in more oxygen in the cylinders. I'm also aware that N2O cools down the air fuel mixture when it evaporates, increasing density and resulting in more volumetric efficiency. What I don't get, is why not just take in more...

What will happen with metal ball in the below picture? it will spin? if yes, when it will stop and why? I am not very faimiliar with physics, but I am sure that ball must spin :D http://www.cagof.com/Untitled.png

I have a 9 hp subaru engine that operates a soil mixer. I find it obnoxiously loud. From other reading the 'mufflers' on many small engines are little more than spark arresters. The location of the engine (about 6 feet off the ground, and the exhaust (on top) make me think that it should be...

What formulas do Diesel Electric Locomotive manufactures use when designing new Locomotives? Are there any good books on the subject? Locomotive meaning train engine. I want to understand freight engine designs not passenger. Thank you, Kevin

Hi, I am going to design my own 50 ci engine, straight 4 cylinder 2 stroke. I know nothing about how I should go about the crankshaft... Very few drawings so far, can anyone guide me on any formulas i should use to figure out what i need, based on piston weight, rod weight and size, etc...

I was just wondering how we can find out the efficiency of a rotary engine? Obvious, it is more efficient than a gasoline/diesel engine.For example the RX8 on 1.3 L in 2 rotors get 250 hp which is quite impressive for that capacity,also it works in 4 stroke,and the power to weight ratio is...

Homework Statement What is the clearance of an ideal otto engine if the efficiency is 46.4% and k=1.3 Homework Equations efficiency = Worknet/Heat Added k=1.3 hot air T= 1900kThe Attempt at a Solution i don't know how to start

Homework Statement A Carnot engine moves a piston which applies 5N of force to a rotating disc by moving a piston 0.25cm for a total of 5W of power. If the high temperature reservoir is 100K, what must the temperature of the low temperature reservoir be? Homework Equations The efficiency of a...

how much pressure can be generated upon ignition of gasoline/air in an internal chamber at atmospheric pressure? I know that combustion engines can generate well over 1000 psi on the piston but this occurs when the air is compressed to begin with.

Hi everyone,I am hoping to discuss the value of a design. The original idea was intended to receive the thermal energy from the exhaust from an internal combustion (IC) engine and produce additional power. The working principle is much like a Stirling engine except that instead of a regenerator...

Hello, So say that I have a small four stroke engine that is designed to be kept static at ground level. I then take this engine and mount it to a small air plane, feeding the engine with either still air from inside the cabin (cargo) or the outside wind. The exhaust is fed out to the wind...

I'm confused on the efficiency of a Thermal engine in the case it is reversible or not reversible, in particular where the ideal gas follows isochoric or isobaric processes. Infact during isochoric and isobaric processes $$Q_{isochoric}=n c_v \Delta T$$ $$Q_{isobaric}=n c_p \Delta T$$ So the...

The thermal engine efficiency is defined as $$\eta = \frac{W_{\mathrm{produced}}}{Q_{\mathrm{absorbed}}}\tag{1}$$ A more general definition of efficiency (not only for thermal machines is) $$\eta = \frac{\mathrm{Work \, produced}}{\mathrm{Energy \, absorbed}}\tag{2}$$ But suppose that, in one...

https://www.researchgate.net/post/Gibbs_free_energy_U-TS_PVIn_a_high_pressure_environment_when_PV_equals_TS_can_we_actually_use_the_entire_internal_energy_of_a_system_to_do_work?_iepl%5BviewId%5D=EMvZ8y3kBTyHiPzK6A8YVYvn&_iepl%5BsingleItemViewId%5D=erF86LeZ0BmbObFXKscz92Ib&_iepl%5BactivityId%5D=7...

I'm trying to determine the amount of load (power loss) a theoretical engine will suffer from an AC alternator, such as one you would find on an automobile engine, they produce something of 40 amps with 110 volts I believe? To be specific, I'm curious to know how much a theoretical engine would...

hi. i want to know how much force acts on every piston in an v8 engine and how much torque acts on the crankshaft . pls also tell me how much energy is created in an engine and how much of it is lost, say in friction and other factors. pls tell the force at start of engine in car and at...

Hi everyone, I have been looking at Carnot heat engines in a bid to better understand entropy, and I can't figure out how it actually does work. Why does the piston move? In some diagrams I have seen weights being removed from the piston, reducing the pressure at constant temperature and...

Does lightning heat air 5 times more the the suns surface? If so can a hybrid lightning jet engine work, as lightning heats up air, more then fuel can? Americas 5th gen jet fighter can travel 3* more then enemy jet's. That means it's a hybrid engine right? Compressed air heated sees the air...

Hello Everyone, I am designing Simulink model for HIL testing. Basic concept: Input: Throttle angle ----> Injection timing from that I have calculated requested torque (% of max torque)(chekced and correct) Real torque follows requested torque with delay. (long list of conditions depending on...

hello everyone, i would like please to know what is Effective Compression Ratio for an RC 2stroke Engine that i have ? the value in the info is 9.7, so i need to know the meaning and what values are the best ? what is the range ?

Hi all, I’m currently investigating the engine in-cylinder pressure by simulation and experimental method. All inputs parameters in the simulation were exactly follow the engine technical specification (engine geometry, compression ratio, fuel injection parameters, initial pressure and...

hello everyone, i hope you're doing well, i am new to this forum so i am not sure if this is the right place for my question what i am doing is trying to calculate the air flow needed for intake of an RC engine Zenoah G320RC in the attachment files, it's a pdf for the info about the Standard...

https://www.sciencedaily.com/videos/d5be126450ab9c4b5c94a7455f267d0a.htm The video does not say how this hyperloop (engine) works can anyone explain?

NO TEMPLATE---MISPLACED HOMEWORK So it seems like a pretty simple question, and in all likelihood it is, but my lecturer somehow managed to miss this bit in his lecture notes. A heat engine operates between 500K and 300K with 20% of the efficiency of Carnot engine operating between the same...

This isn't for any particular project or assignment, but I've tried solving this in the past and haven't figured it out. Say you have an RC seaplane, like the one pictured, with the engine mounted well above and aft the CG. You're going to need to angle it down a little to counteract the...

I know a bunch of people who have their own website or blog, including myself. When you search some of the sites’ names, they pop up immediately as the very first link and, for other ones, it just never pops up. I’ve tried to read about this, but I find it hard to understand. How does this work...

I know that this has been talked about already, but from the responses, I feel the topic was not addressed to the fullest, but as we know a Jet engine is subject to the amount of O2, so i was looking at a earlier post about this topic. within the replies to that topic the rocket engine was...

Im currently writing a code to find the optimum rpm points to shift gears to maximize acceleration. Thus far I've found the shift points and the rpm's after an upshift, meaning I have my bounds on my rpm vs torque curve. For simplicity's sake I'm assuming and increase of 1000 rpm to take 1...

Homework Statement Homework Equations P=2piNT/60 P=I^2R Pin=Pout/efficieny E=P/t The Attempt at a Solution 2.1 P=I^2R = (5)^2x48 = 1200W 2.2 Pin=Pout/efficiency = 1200/0.86 = 1395.35W 2.3 P=2piNT/60 *3100.78=2pi(500)T/60...

Hello All, Is it possible to work back from drive torque at wheel to engine torque? Can it be described with basic equations and is the calculation same between all wheel drive and front wheel drive? Thanks Anj,

I had an exam last week and I just got it back today. On the exam was a question that I got wrong even though his wording was terrible (he's from India) and I feel that it was not clearly expressed what he was saying. The question is: "A heat engine is 20% efficient. If it absorbs 500 J of heat...

Hi, I've defined engine power requirements based on driving dynamics, but am not sure how to extend this to engine parameters. From design requirements, I've fixed my gear ratios, and hence can determine how much power and torque is required from the engine at a particular speed. I want to then...

< Mentor Note -- Poster has been reminded to use the Homework Help Template and show their work on schoolwork problems >[/color] Hello everyone I have some questions on engine calculations that I need help in please. 1) A reciprocating internal combustion engine operates on a 4 stroke cycle...

Homework Statement A 112 hp car engine operates at 11% efficiency. Assume the engine's water temperature of 85°C is its cold-temperature (exhaust) reservoir and 445°C is its thermal "intake" temperature (the temperature of the exploding gas-air mixture). (a) What is the ratio of its efficiency...

What's going to let an engine last longer: 1) Accelerating quickly to just above desired speed and coasting until speed drops 2) Holding engine at a more constant lower rpm to achieve that desired speed I know to some extent 1) is better for fuel when the acceleration isn't too hard but...

Internal engines got a flywheel connected to the crankshaft on one side, and on the other there is a wheel that drive all the engine accessories with a belt. If the main power output would be taken from the "belt" wheel and not the flywheel, would I receive the same power output? And if no, is...

Every thermodynamics cycle needs to do negative work to the environment, which lower its total positive work. For example, in Carnot cycle, the most efficiency possible: 1/ Engine receives heat from hot reservoir, expands and do positive work to surround 2/ Surround does work to engine...

Hello, I am trying to find out if there are any differences between how the Electric engine for car works vs how an Electric Engine for Drone works. I am sure the both consist of an Ignition coil, stator and rotor. However I have not been able to find the any schematics for a drones electric...

the vw type 1 engine comes with flaps that close when the engine is cold. i know the flow through the fan doesn't completely stop but for the sake off argument let's assume that is does. the fan is spinning but there is no flow. what power is required to maintain the pressure differential...

We have tried to convert a petrol engine into a compressed air engine back in our graduation project. At that time we only measured the RPM of engine using tachometer and pressure of compressed air using pressure gauge. Now, we need to know the power of wngine at those readings. As the setup is...

Hi! I am a student who is passionate about engines and mechanics (although the major I'm pursuing is CS.I believe we must not inhibit our intellectual curiosity). The following link will take you to the picture of an uncovered General Electric Next Generation Turbofan engine used by the 787...

What is the price per kilowatt or hp for the simplest, cheapest diesel engine, such as ones used for powering irrigation pumps? Say one of 1/2 MW or 1 MW. S.A.

I have a small confusion that can an irreversible engine have greater efficiency than reversible engine if both have different source and sink temperatures?I know that under same conditions reversible engines are more efficient but what can be concluded under different conditions like both...