Well, i know the guy who does the videos rather well ;) and the videos are only chosen for being spectacular and not fast. Mild to no wheel spin is faster but very boring to watch. Thats also the...
Type: Posts; User: RenM
Well, i know the guy who does the videos rather well ;) and the videos are only chosen for being spectacular and not fast. Mild to no wheel spin is faster but very boring to watch. Thats also the...
Don't be ridiculous. Those starts are chosen for the Video, because they look more spectacular then a perfect start and this video does by no mean show an average of the FS starter field.
...
You have 2 parameters:
- the air consumption of the engine
- the maximum restrictor air flow
Air Consumption:
For a naturally aspirated engine you can estimate a volumetric efficiency of 1. So...
Traction Control is not very fuel efficient with an engine that uses intake-manifold fuel injection. The only way to control the power output fast and reliable is by changing the ignition and thus...
I am sorry, i really dont understand your question : "Also the goal is to find the engine RPM at initial turboshaft RPM "
If you are running a static simulation the initial turboshaft rpm doesnt...
You should really rethink your turbo matching. If you don't need a wastegate, your turbine will be way to big to get a good transient response which is VERY VERY important in FSAE.
Perhaps your...
Hello Ritwik,
1) get the engines burn duration you need to run a pressure indication system and calculate the burn rate from the sensed pressure signal. This will however require a very expensive...
Okay i am trying to clear things up a bit.
As apalrd said the IVC (intake valve closing) is the most important part of the cam timings and is very influential for cylinder filling for a naturally...
I would advise you to change cam timings first, because this can be done easily and has a big effect.
Changing the duration of the cams without any calculations of the influence it has on your gas...
the average piston speed at 8,500 rpm is 18,9 m/s so there should be room for higher rpms.
increasing the compression ratio shouldn't be too difficult considering the relatively large stroke.
You obviously haven't been to FSG yet. There are enough fire extinguishers, run-off ares and more then enough bumps on the track ;)
Well there are very capable and small electric motors from hobby rc applications. The main problem i see here is the map of the compressor used. It only fits to way bigger engines.
people rule out superchargers as a viable option way to soon. Especially given the circumstances in FSAE.
- Modern Superchargers do have a very good efficiency that is no worse then radial...
wow, one of the few times that i have to say i think Z is right (even though i would have build a different engine then him).
The Mahle Engine was a good concept badly executed.
The AMG Engine to...
the burn rate is not an issue just as the heat transfer losses are no issue for a multi cylinder engine. Its just something that decreases your efficiency.
With our 4 cylinder car, we can quickly...
I dont think that the power to weight ratio of the engine is very meaningful. Youd have to compare the power to overall weight (including driver) to get a real comparison:
Driver weight: 70 kg,...
You will get higher turbulence and thus a higher flame speed with a single compared to a four, especially as most 4 cylinder engines cylinder heads are optimised for a large filling rather then for...
i am of course comparing a single na to a 4 cylinder na.
Thx for noting when the rant starts.
I have no where argued that a car with a 1 cylinder engine is not competitive. Dont read anything...
Wrong. With the air restrictor a single cylinder na engine will never produce as much power as a 4 cylinder, due to the fact that you can not keep a constant pressure difference over the restrictor....
You seem to confuse quite a bit and i was not specific enough.
The decrease in density at the restrictor throat increases the volume flow rate at the restrictor throat. Thus the decrease in...
A decrease in density INcreases your volume flow for a given mass flow.
With increased volume flow and fixed flow area the flow speed is increased.
Increased flow speed means that choked flow is...
Your calculation is wrong. What you didnt consider is, that the density of the air decreases as the flow is accelerated through the nozzle (see Bernoulli). This increases the volume flow and flow...
a clever designed electric supercharger wont need a lot of energy during an endurance. Depending on your boost pressure 3-5 kg in batteries will be more than enough.
Your idea sounds nice in...
For most parts the processing costs are way higher then the material costs. So simply ignore the machining costs if its done inhouse is not a feasible away, as it would strongly penalize the teams...
It would be nice to have the real price of the cars, but it will never happen. What about self machined parts? There are no invoices for that. And furthermore invoices can be "tweaked" too easily to...