What is an RPM?

[@wezibanda3374]

Finally I found a video that simplified rpm to me like a toddler damn 👍

[@verycringeyoutubechannel7205]

Me to

[@shortcoolvideos3433]

nope, its soooooooooo confusing, and i didnt even learn anything

[@apprenticemath]

"Better" is a personal choice. Torque is another word to mean force, easy to measure. HP is always calculated from it. High rpm machines will need to be revved and raced to get going. Low rpm machines pull like a tank or a ship: not fast but can move a mountain or a load (towing). High rpm machines wear a lot faster and eat a lot more gas than low rpm ones (same engine sizes compared, not a race bike vs a dozer). (This posting is a simplified approach, not a doctoral dissertation, ok people?)

[@buahhatiumi3014]

Thank you very much Sir.. You are helping a lot.. thanks.. Love from Malaysia 🇲🇾

[@oliverbrookes8324]

1000 X r/min -- r means revs not revolution

[@apprenticemath]

Excellent question, will post a video on it. Idle is an arbitrary number regarding an engine speed at which the motor just barely runs but does not stall. Gasoline motorcycle engines idle at 1250 rpm, gasoline car engines idle at 800 rpm, diesel truck engines can idle at 500 rpm. To get any amount of work out of an engine, it needs to run faster than idling speed. To start on a steep uphill, you need "big gas", need to run the engine at 1500 rpm just to get going.

[@mahocomer5584]

You made it really easy to understand! Thank you 😊

[@apprenticemath]

Thanks for watching!

[@DevnullTheFirst]

Who's here after Ford v Ferrari

[@A10-Thunderbolt-II]

7000 rpms

[@rx7381]

LMAO

[@4gerars500]

Lmfao no

[@abhinavivaturi3387]

Ah ke

[@gameclips5482]

No lmfao

[@ianrobinson2474]

The watch thing you showed got it to me, thanks man 🙏

[@apprenticemath]

Glad I could help!

[@jsteins]

Most gasoline car engines run about 2500 RPM to 3000 RPM at highway speeds... so that would be about 50 turns per second. (ie 25 power strokes on each piston per second) If you have a 6cyl engine, that would be 150 power strokes+sparks for whole engine per second. Another way to look at it: if caris driving 60 mph (88 feet per second) at 2500 RPM in a car with 4cyl engine, then the gas used for each piston's power stroke is moving car fwd about one foot. (or 1/3 meter) For metric perspective: if 3000RPM gets a car with 6cyl engine to 120 kph (33.3 mps) then each piston power stroke (150/sec) moves car 0.22 meters. (22.2cm or 8.75 inches) There is also a 1/3 overlap for a V6, where power stroke for one cyl starts before the previous one finishes. Most 4-stroke diesel engines in pickup or truck will turn about 2100 RPM at road speed... so that is 35 turns per second. If that is a V8 truck engine, you have 140 power strokes per second, and could be driving 60mph, then each cyl power stroke moves truck about 7.54 inches or 19.16 cm. A V8 engine will slso have about 1/2 power stroke overlap, where another cyl fires when previous one is about half down... giving more even torque/power. Small gas engines like motorcycles tend to turn higher speeds, and may run 6000 RPM (twice as fast as car) near 120 kph... but could only have two pistons, which would be 100 power strokes per second, so a 4stroke 2cyl engine would move cycle about 33cm per power stroke. (aprox 1ft. which is similar ratio seen with car shown above)

[@yassersami]

very helpful and simple. Thanks Sir

[@TiberiusStorm]

Why do Motorcycle engines have over double the RPM's of a car engine??

[@apprenticemath]

To accelerate ferociously. A tractor idles at 700. A container ship redlines at 120. A Formula 1 car idles at 6000. Motorcycles have small & light pistons to make them rev.

[@AYouTubeChannelwithNoName]

Because a car is 3 times the size of a motorcycle

[@riteshkhatri2047]

Like Big eagle has big wings so he flaps them slow to generate lift but humming bird has small wings so it flaps 'em faster

[@cillianryan1065]

So if I understand correctly the amount of rpm defines how fast your wheels can spin

[@deambassador001]

Thanks man this was very helpful

[@musasizigodfreydixion6231]

Great video.I have understood the meaning of rpm.

[@mirzamohsinbaig6481]

You are my another sir without fee 😍❤️😍

[@Mrkhan-dg9dt]

Great , beautiful way of explaining. Thanks

[@taylormuzuana7078]

excellent explanation sir ,well done!

[@kCedarwood]

Ty so much for the visual and expounding on vocabulary

[@nsdfancy]

Your accent is like a little bit of every accent in the world lol

[@hancockscock2154]

I heard country german Russian n a lil bit of chicago lool

[@positive.stories]

Well explained!

[@MrJerm200]

What part of the vehicle does it go by though, just the axels? Thought it had something to do with the engine

[@apprenticemath]

Some trash from a bin on campus, don`t know ...

[@SimplexSM]

It goes by the crank sensor.

[@apprenticemath]

There is not. Mechanical, contact-type gages and instruments have frictional losses, however small, = they show less than actual rpm due to frictional losses. Non-contact gages and instruments have no fricion losses, they have signal delay and processing losses, = they show less than actual rpm due to signal losses. Non-contact instruments are pretty accurate though. Actual rpm is determined mathematically.

[@jolxmrh329]

Thanks for your efforts it’s helpful

[@chamandorarwanda12]

This is a good explaintion... Please make another ones for torque, force .erc

[@apprenticemath]

Thanks, will do!

[@markaustinsickbasshead274]

Thanks . Simple and best explaination

[@ragequit5856]

The Hero we needed.

[@mohamadkafim]

That was very Helpful. Thanks

[@sLiLHaMyTSubscribe]

You could simply finish the video by saying- rpm can be defined as "rounds per minute"

[@shakerxero2773]

Great video

[@apprenticemath]

Glad you enjoyed it

[@radiagulzan]

this was soo helpful thank you !!

[@madushankamewan144]

Good job man

[@jerikmanalastas9747]

Hi, I came here from Initial D, 2nd stage to understand RPM much clearer.

[@megosmegos8910]

Thank you !

[@mikemeetstec]

How'd you do in physics?

[@TREoriginal]

The rpm in car will be 6000.Cz 6= (6*1000) rpm. Btw the video was helpful.

[@joeblo3295]

is there such thing as an accurate 100$ precise rpm calculator?

[@shawnaburns5158]

Simple,,,if you keep the tachometer needle on number 1 for 60 seconds 1 minute / you're engine has turned 1,000 times in the minute

[@jesuisshirley0716]

So simple thank you❤❤

[@apprenticemath]

You're welcome 😊

[@TheCitySirs]

what is idle and what does it do to a car when its on idle?

[@fletcher2313]

TheCitySirs idle is when the engine isn’t being accelerated but it is on You were 5 years younger when you asked this

[@bibiwastaken]

@@fletcher2313 lmao

[@nelsonnong6985]

Fletcher Damn you rock

[@leejohnson.]

What makes 1 rev??? In other words... what axel or shaft that is revoluting once every minute? I want to know what object/ component/rotor or shaft... is making 1 revolution?

[@apprenticemath]

Any. You can walk around a chair taking 1 minute, which is 1 rev = go around once. 1 full circle. 1 rpm.

[@leejohnson.]

apprenticemath hahahaa i want to know what makes 1 rev in a car lol

[@shawnaburns5158]

All the moving components of the motor I was told

[@naimurrahman1927]

Thank u very much.from Bangladesh.

[@poojam6279]

Is engine speed and engine rpm the same??? What is the formula to calculate engine rpm...can u please guide.i am working on a project and need these values for calculation

[@altangerelerdenebat8730]

My english very bad .but i understand .explain so good

[@MelianLimGachaVideos]

RPM! Get in Gear!

[@alge8200]

Sir i wish you were my instructor.

[@shawkir35]

I like your pen.

[@Sacky203]

Does it mean that a car which is having 300 horsepower is faster than the one that is having 200 horsepower?

[@apprenticemath]

Speed has nothing do with power. A 1000 horsepower tractor or a 10 thousand horsepower tanker is very slow. For a bit of explanation on power, see kzbin.info/www/bejne/i5Sxaol9qruSq7c

[@sumandas9487]

sir i have a question a man using a kite reel fitted with ball bearing 3 inch diameter and rpm is 3000 will you please tell me what is the answer in meter/second?

[@apprenticemath]

Not enough data

[@sumandas9487]

apprenticemath hello i wanted to built a kite reel that can fast in pulling the kite i saw it and got some data about it now what type of data you need to do the correct calculation.

[@apprenticemath]

To calculate what? Length of string? The lift the kite generates in a 10-knot northeasterly wind at 2 pm in the afternoon? The age of the busdriver?

[@MixUpMike69]

How do you know how much RPM your car has when you change piston etc

[@apprenticemath]

MixUpMike69 Same piston size - same rpm, same tachometer reading. One of the pulleys on the side of the block are mounted on the crackshaft, direct measurements can be taken on it.

[@edwinbuelatv9147]

Thank you.

[@apprenticemath]

No worries!

[@evelyndominguez2443]

QUESTION ANSWERED. THANKS 🔺️👁🎬

[@sudiptakumardeka9042]

Equip energy on you stay strong and speak clearly

[@devontatro8803]

Thank you that is very useful for me.

[@bommareddybrijendrareddy9301]

But rotations is about it's own axis whereas revolutions are not, they revolve or circulate their whole body about some axis circumference. The crankshaft too rotates about it's own axis, how is it revolutions per minute then? Please correct me if I am wrong. Thanks.

[@kymmurray9098]

Its a little beyond the scope of this video but you have to think of the shaft or axle irrespective of its radius (and thus circumference) and how you measure what is a single turn. You may know that a circle is made up of 360 degrees in common terms. Thus a point on the circumference of the shaft rotates 360deg in a single whole turn..... 180 deg in a half rotation and 90deg in a quarter and so forth. This leads onto the topic of expressing degrees as 'radians' as in more general engineering terms "revolutions per minute" is converted to or expressed as "radians per second"..... but maybe Ive gone off topic too much already

[@bommareddybrijendrareddy9301]

@@kymmurray9098 Haha lot of information to process! But thanks mate!

[@apprenticemath]

Rotation and revolution are interchangeable synonyms in this video. Bicycles have 2 cranks on a shaft, (so it`s a crankshaft), rpms are important to keep a pace. Starting your crank, pedal and knee at 12-o`clock position you rotate first a 1/4 turn to 90-degree position, then down to 6-o`clock position, back to vertical 12-o`clock position, the shaft on which the cranks are mounted did 1 revolotion. Doing 80 of these in a minute, or 80 rpm on a bicycle for an hour could be a nice cardio workout, depending on gearing. - sorry about the long wait -

[@nazorated]

Thanks bro i needed this😃

[@ayeshamobile2576]

Thanks you so much brother

[@runbou3019]

អគុណបង👏thank

[@mithunsahu8437]

Very thankful to you

[@jeganathanamaladhas5968]

thanks to make me learn rpm

[@kpop_is_my_addiction]

Excellent

[@AYouTubeChannelwithNoName]

Revolutions per minute

[@Premium_Me]

Tysm

[@wellimstillwrongbut2065]

Thank you

[@BinodonVideoNews]

helpful video

[@joeblo3295]

thanks for the vid

[@MehediHasan-bp7ox]

very helpful thanks

[@kenesufernandez1281]

❤️

[@bbbbbb-em4kr]

thank you very much

[@jurijasimunovic2701]

SF9 STAN? ¿

[@Nancivlog]

Super

[@shazgee1996]

sounds very much like United's Murinhio... Portuguese

[@catchsight1]

Correct on spot

[@torianapalacki1006]

If rpm just simply measures the amount of rotations a wheel turns per minute, what is the point of rpm then. why do we need to know how many times a wheel rotates per minute? Wheel sizes are different from bikes to motorcycles to cars to trucks, so speed can't be measured with rpm cause if one small wheel is going 100 rpm and a big wheel is also going 100 rpm, the big wheel is going to get further so you can't use it for distance per minute so like whats the point of it. Why are their rpm pedometers on things. Why do we need to know how many rpm of a wheel on a vehicle? Like i get what rpms is, but i dont understand the point of it and why people use it as if it does have to do with speed cause like I said, all wheels aren't the same size so it can't be reliable for measuring speed to me.

[@TaM-6cT]

I thought it was RPM means Rate Per Metre

[@madushankamewan144]

Why motorcycle rpm high and car rpm low

[@apprenticemath]

Designed to accelerate fast (mc) vs. putt-putt for long life and low wear (car, tractor, ship)

[@pietmatsobane6790]

Thanks :-)

[@rushanbista3946]

1/60 rpm is not correct. Cause / And 60 already indicate p,m So if you write 1/60 rpm it will be 0.016666667 so it's totally incorrect . In easy way. R indicates rotation So RPM= Rotation per minute

[@0xssff]

thanx bro :D

[@surronstar]

don’t u mean 1/60 seconds not 1/60 minutes

[@apprenticemath]

actual full turns in 1 minute

[@joeblo3295]

oh ok,thanks.

[@Drsparjan]

60 seconds to rotate once

[@dreamkiller808]

r u British or American speaking bro☺

[@apprenticemath]

neither really

[@dennisabalajen4990]

it's the overinger they have chanel on youtube

[@gamereviews3559]

Yah Ek Achi Film Ha neither

[@josephcaporale5671]

sounds danish to me or dutch or french idk western european fo sho love the accent tho americans arent that lucky

[@Ray-mw1fx]

He has a certain European accent.

[@peacesantisuk4278]

I came here after Ford v Ferrari

[@MrKamei]

Why are you trying to sound like Johny depp?😁

[@stupidnameunreal]

i feel like im in school

[@swastikkar5329]

So rpm= acceleration???

[@apprenticemath]

somewhat, yes

[@seuthee5082]

What accent is this?

[@NOLACKINGSLIME]

2:33 wrong 1000 times every minute....

[@vbarcodev9714]

Haha funny guy

[@rahibahmed1395]

Hahaha

[@bassdaily4596]

ur complicating things man

[@nipsycole9480]

Good student but bad teacher lol