jet engine hits 161000 RPM!!!

[lolaroflmao]

in jet engines what spins around? why is it measured in rpm? isnt it just air being sucked in and blasted out the back. theres nothing spinning?

[MovieMad007]

@lolaroflmao Its sucked in yes, but its also heated to an extremely high temperature (hot air expands) and then released through a very small aperature - this creates the thrust!

[MovieMad007]

The turbine blades spin round a drive shaft

[havsys]

Which PC software you are using?

[Polybun]

heh, jese, that egt spike is harsh

[flyingv567]

big deal my car can hit 180000

[Turbolad995]

Can you make it spin even faster??

[mattsr71]

wer did u get that engine from????

[andrestyle2009]

the sound is like dragon ball's fights

[blastoizdrugi]

jebo te otac lazljivi

[littlebuch]

where are the 1000000000000 rpm's from the title cuz i saw only 160 not 160000000000000000000000000

[nlhans1990]

The RPM's are displayed in k's. Look at the gauge. It says: x1000.

So 161 means , 161 x1000 = 161.000 rpm

[littlebuch]

oh, thanks

[TheChiefEngineer]

where did you get the software and associated equipment from?

[jjw3579]

Why does the EGT climb for a bit as the RPM drops?

[ah89]

exhaust gas temperature perhaps??

[adamjayne]

Because at low RPM's they run really rich to keep the engine alive(runnin') and when they ramp it up the temp drops because the fuel is now being burnt WELL !(efficiently) and when the rpm's drop it goes back to runnin' rich.

[eolavsen]

As it starts too spool down the compressor draws less air, therefor there is less cooling air. Turbines are cooled by air ducted out and around the combustion case. So after the spike due to less cooling air the egt follows the rpm down. The opposite happens when accelerating. Higher power selection is made, more fuel dumped, EGT spikes then More cooling air is brought in as the compressor turbine spools up, EGT lowers.

[Cordius]

The air is actually moving extremely fast at higher RPM, but as it drops the air actually has time to directly affect the thermostat. It's not that the EGT itself climbs in temp, it's just the thermostat can only read temperature on air moving so fast. Heat takes time to transfer but it can only happen if it sits around the thermostat long enough. That's why the temperature won't update as fast as it should.

[texasdirtbiker]

not as much air going through to cool the gas down...

i think. im not positive.

[assailant85]

@jjw3579 I guess it's the same reason why it drops when the RPM is climbing in the first place, I'm thinking it could be because more air is sucked in and is cooling. when the RPM is dropping, less air is sucked in thus the temperature goes up. but just guessing

[drtracernum20]

@jjw3579 less air volume going through to cool the engine

[JameKugelmann]

@jjw3579 Hi, it does this because the compressor in the engine is at idle speed so the heat increases a little as the hot fuel and residual heat clears out of the engine

[jakedademon]

your forgetting the two main types of jet turbine compressors, high and low bypass. Fighter jets use low bypass, and commercial jumbos use high bypass. the changing the setup and theory just a bit. but i could be wrong, engines arent my expertise

[Cobija13]

LMAO the temperature

[yourmom922]

it sounds so tame at 20,000 rpms lol

[MystikalDawn]

jet engines are measured in N1 percent and lbs of thrust more so then RPM

[89tommyeflight89]

What do you think N1 is?

[MystikalDawn]

N1 Percent is basically how much the engine is running of its capasity, so if the engine is running at 40N1 then its running at 40% of its capasity.

[89tommyeflight89]

Lol..

My point is N1 is engine speed, (specifically low compressor) and is a ratio of RPM. You can have n1, N2 etc.

Your post is sort of contradicitng...

[MystikalDawn]

yes, N2 is typically higher then N1, i think but dont quote me on this is that N1 is the main blades that you would see from looking into the engine, N2 is the compression blades, correct me if im wrong though

[russell44]

At our university we measure it in RPM and it works just fine :)

And Theodore von Kármán has graduated here too...

[hondac55]

Theodore von Kármán was my hero back in highschool...then I dropped out, but I do make money. Highschool dropouts can make money! But just to be safe, stay in school :)

[russell44]

Roger! :)

[hondac55]

lol.

[Sterlingjob]

N1 is always higher. N1 is the fan and N2 is the high pressure compressor.

[TheChiefEngineer]

N1 is the speed of the Gas Generator, and N2 is the speed of the Power Turbine section.

[Sterlingjob]

You measure N1 as a percentage not an rpm because of the varying density of the air. If the air is denser you will get less of an rpm, if its a hot day the rpm will increase with the same fuel flow.

[rhodeislandrasta]

hah digital pegged out haha

[tommysbrowncaddy]

I think you can do better than this.

[kartkid100]

what kind of bearings did you use?

[chrigui]

HYBRID CERAMIC

the kolibri turbine hit 225.000 rpm

(martin lambert made)

[lbj18]

to day how much is jet fuel a gallon i wont to know im curius

[JephN]

$5.35/gallon in Philly.

[xmike615x]

what program are you using to read out the RPM? thank you

[cmnspwr]

680* C! Thats hot! Why do the EGT's go down as the RPM's increase?

[Fentanyl3]

as the airflow/rpm rises, there is more air to "cool" if you will the engine it also has to do with the mixture, compression ratio and other factors. It's also possible that the hottest area of combustion is being pushed beyond the sensor by the airflow coming in

[bchokola]

for the engines I'm used to dealing with, egt rises to bring up the rpm's, then the egt will settle back down after it's on speed.

[mikelzapi]

awesome, the jet engine and the data adquisition

[rodstartube]

timboy666 do you have a rc plane or helicopter??

[timboy666]

i have a rc plane but not for this engine yet!

[wtfmatelol]

yeh! im really impressed!! i really want a wren.. but there's no way i can afford it :(

[wtfmatelol]

how much fuel does it use up running at these rates?

and how much energy it put out?

sweet engine by the way

[timboy666]

Hi, it will burn about 1 litre every 4 mins but you wouldnt fly it on full power all the time! so fights

will last about 6 mins on 1 litre, its power output is

just over 16 lbs of thrust. not bad for something the size of a bake bean can!!

[kdwormy]

if I could manufacture a jet engine I would so build myself a jet... XD

[Fentanyl3]

You can, if you can weld a little bit, and have access to a drill, some sheet metal, and an old, but working turbo from a car or truck, if your pretty decent with welding/fabricating you can even build a pulse jet

[buddybestor]

can i get something like that for my bike...lol!

[timboy666]

it has been done before lol

[santhosh11dec]

@timboy666 hi... how do u calculate the RPM ?? wats that software called ?? is there a open source code for that software ?? please reply...

[renaman20]

@buddybestor

MTT Turbine Superbike

Top Speed: 230mph

$130,000



[timboy666]

Its based around the wren MW54

[macromadia]

whats the model of engine?