Reply
Go Back   TexasBowhunter.com Community Discussion Forums > Topics > Around the Campfire
 
Thread Tools Display Modes
Old 10-14-2021, 01:10 PM   #1
Pushbutton2
Pope & Young
 
Pushbutton2's Avatar
 
Join Date: Feb 2013
Location: Van,TX
Hunt In: Mc Culloch County (2015-2021) Van Zandt County since 2017
Default I tried to cipher this math problem in my head

Why? Cause I want to keep my brain sharp.. I haven't done much math lately and I'm rusty.

How many round trips to work before engine fails?
Will it fail on way home?
How far from home?
Engine fails @ 1 million rpm.
It's 43 miles to work & 43 miles home.
Engine idles @ 500 rpm. Avgs 7 minutes idling each before driving.
70 mph is 2,000 RPM ( less rpm more time)
80 mph is 2,300 RPM ( more rpm less)
Pushbutton2 is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:14 PM   #2
adam_p
Ten Point
 
adam_p's Avatar
 
Join Date: Sep 2011
Location: Pilot Point
Hunt In: Cooke, Denton, Oklahoma
Default

RPM is a measurement of speed not distance.
adam_p is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:14 PM   #3
Goldeneagle
Pope & Young
 
Goldeneagle's Avatar
 
Join Date: Oct 2006
Location: Allen, TX
Hunt In: Where ever I get a chance.
Default

Purple!
Goldeneagle is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:14 PM   #4
sideways
Ten Point
 
sideways's Avatar
 
Join Date: Nov 2009
Default

Is it a ford dodge or Chevy?


Sent from my iPhone using Tapatalk
sideways is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:15 PM   #5
MadHatter
Pope & Young
 
MadHatter's Avatar
 
Join Date: Feb 2014
Default

Is it a Toyota?
If so add a million rpms to your failure number
MadHatter is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:15 PM   #6
RLB
Pope & Young
 
RLB's Avatar
 
Join Date: Sep 2009
Location: Spring Branch / Bulverde, Texas
Hunt In: Comal County
Default

I'd like to see the tachometer that has 1,000,000 on it.
RLB is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:15 PM   #7
highspeed
Ten Point
 
highspeed's Avatar
 
Join Date: Jan 2010
Location: Here
Hunt In: The wilderness where the wild things are doing wild things.
Default

The engine fails after 1 million RPM???? Must be a Tecumseh
highspeed is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:16 PM   #8
Pineywoods
Pope & Young
 
Pineywoods's Avatar
 
Join Date: Jan 2014
Location: Livingston
Hunt In: East TX & North TX
Default

Is this the new common core math that I've been hearing about?
Pineywoods is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:16 PM   #9
Ag 89
Eight Point
 
Ag 89's Avatar
 
Join Date: Oct 2012
Location: SETX
Hunt In: Segovia, Menard
Default

It will fail at 1 million rpm. Doesn't matter how many times you go back and forth if less than 1 million rpm at any one moment. Now if it fails at 1 million revolutions, that is a different problem entirely.
Ag 89 is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:17 PM   #10
SabineHunter
Guest
 
Default

Ivermectin and zinc
  Reply With Quote Back To The Top
Old 10-14-2021, 01:17 PM   #11
RLB
Pope & Young
 
RLB's Avatar
 
Join Date: Sep 2009
Location: Spring Branch / Bulverde, Texas
Hunt In: Comal County
Default

Quote:
Originally Posted by adam_p View Post
RPM is a measurement of speed not distance.
RPM is a measurement of the revolutions the engine is making, not speed. It could be wound up, running @ 3,000 rpm's and going zero mph.....as long as it's not in gear.
RLB is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:18 PM   #12
Drycreek3189
Pope & Young
 
Drycreek3189's Avatar
 
Join Date: Jun 2013
Location: Troup
Hunt In: Cherokee, Rusk Counties
Default

Quote:
Originally Posted by MadHatter View Post
Is it a Toyota?
If so add a million rpms to your failure number
And 25,000 gallons of gasoline……..
Drycreek3189 is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:19 PM   #13
Muskles
Pope & Young
 
Muskles's Avatar
 
Join Date: Oct 2016
Location: Jacksonville
Hunt In: Cherokee Co
Default

Quote:
Originally Posted by Goldeneagle View Post
Purple!
Can you show your work? I came up with brown.
Muskles is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:19 PM   #14
highspeed
Ten Point
 
highspeed's Avatar
 
Join Date: Jan 2010
Location: Here
Hunt In: The wilderness where the wild things are doing wild things.
Default

Quote:
Originally Posted by adam_p View Post
RPM is a measurement of speed not distance.
Turn the 70mph into time it takes to get to 43 miles and from there, it can be converted to RPM.
highspeed is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:19 PM   #15
adam_p
Ten Point
 
adam_p's Avatar
 
Join Date: Sep 2011
Location: Pilot Point
Hunt In: Cooke, Denton, Oklahoma
Default

Quote:
Originally Posted by RLB View Post
RPM is a measurement of the revolutions the engine is making, not speed. It could be wound up, running @ 3,000 rpm's and going zero mph.....as long as it's not in gear.
Revolutions the engine is making is still a speed measurement. Not the vehicles speed, the speed at which the crankshaft is turning.
adam_p is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:21 PM   #16
adam_p
Ten Point
 
adam_p's Avatar
 
Join Date: Sep 2011
Location: Pilot Point
Hunt In: Cooke, Denton, Oklahoma
Default

Quote:
Originally Posted by highspeed View Post
Turn the 70mph into time it takes to get to 43 miles and from there, it can be converted to RPM.
Revolutions
Per
Minute

is always a speed measurement and there is no engine on the planet that can do 1,000,000 revolutions per minute.
adam_p is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:26 PM   #17
Gumbo Man
Ten Point
 
Gumbo Man's Avatar
 
Join Date: Aug 2021
Location: Livingston Texas
Hunt In: Onalaska Texas
Default

I’m coming up with 5 1/2 and 152. Oh hold on, what was the question?
Gumbo Man is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:26 PM   #18
bullhead44
Ten Point
 
bullhead44's Avatar
 
Join Date: Nov 2013
Location: collinsville tx
Default

My bet is it will fail well before reaching 1 million RPM
bullhead44 is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:27 PM   #19
Lynn21
Pope & Young
 
Lynn21's Avatar
 
Join Date: Mar 2012
Location: Mesquite,texas
Hunt In: Childress, Tx
Default

Burt Reynolds died.
Lynn21 is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:31 PM   #20
highspeed
Ten Point
 
highspeed's Avatar
 
Join Date: Jan 2010
Location: Here
Hunt In: The wilderness where the wild things are doing wild things.
Default

Quote:
Originally Posted by adam_p View Post
Revolutions
Per
Minute

is always a speed measurement and there is no engine on the planet that can do 1,000,000 revolutions per minute.
The engine fails after it has turned 1,000,000 RPM's
highspeed is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:33 PM   #21
Goldeneagle
Pope & Young
 
Goldeneagle's Avatar
 
Join Date: Oct 2006
Location: Allen, TX
Hunt In: Where ever I get a chance.
Default

Quote:
Originally Posted by Muskles View Post
Can you show your work? I came up with brown.
43mph/3000rpm=X
(X-80mph) x 1,000,000rpm = Purple


There ya go.
Goldeneagle is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:33 PM   #22
hpdrifter
Ten Point
 
Join Date: Sep 2014
Location: kerens
Hunt In: anywhere I can
Default

Quote:
Originally Posted by highspeed View Post
Turn the 70mph into time it takes to get to 43 miles and from there, it can be converted to RPM.
out of those, all you need is rpm. Miles comes into play for revolutions per trip.

but also tire diameter, rear end gear ratio, cruise gear ratio of transmission, you'd also need time in lower gears and their ratio.

But a tachometer takes care of that.

PB just think about deer hunting, watch odometer and make decision from there.

Somebody is lowballing engine failure. At 1700 rpm you'll have 102000 revolutions per hour.

Last edited by hpdrifter; 10-14-2021 at 01:50 PM.
hpdrifter is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:34 PM   #23
Trumpkin
Ten Point
 
Trumpkin's Avatar
 
Join Date: Feb 2016
Location: Austin, TX
Hunt In: Sore Finger!!!
Default

This is absolutely dead simple... 278.
Trumpkin is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:39 PM   #24
CEO
Pope & Young
 
CEO's Avatar
 
Join Date: Jul 2012
Location: The Woodlands, TX
Hunt In: TX, MO, CO
Default

Quote:
Originally Posted by Goldeneagle View Post
Purple!
Quote:
Originally Posted by Muskles View Post
Can you show your work? I came up with brown.
If my calculations are right (pythagorean theorem) you are both correct.

Purple=70mph
Brown=80mph
CEO is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:39 PM   #25
adam_p
Ten Point
 
adam_p's Avatar
 
Join Date: Sep 2011
Location: Pilot Point
Hunt In: Cooke, Denton, Oklahoma
Default

Quote:
Originally Posted by highspeed View Post
The engine fails after it has turned 1,000,000 RPM's
No kidding?
adam_p is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:41 PM   #26
highspeed
Ten Point
 
highspeed's Avatar
 
Join Date: Jan 2010
Location: Here
Hunt In: The wilderness where the wild things are doing wild things.
Default

12.9 Trips @ 70 MPH so it'll fail on the way to work
11.9 Trips @ 80 MPH so it'll fail on the way home
highspeed is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:41 PM   #27
txpitdog
Pope & Young
 
txpitdog's Avatar
 
Join Date: Dec 2006
Location: Kingwood
Hunt In: Fairfield
Default

One closer to 10,000
txpitdog is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:45 PM   #28
Gclyde28
Ten Point
 
Gclyde28's Avatar
 
Join Date: Apr 2014
Location: Austin, TX
Default

Quote:
Originally Posted by highspeed View Post
The engine fails after it has turned 1,000,000 RPM's
Then it will never fail because it will never turn 1,000,000 in a minute.
Gclyde28 is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:48 PM   #29
highspeed
Ten Point
 
highspeed's Avatar
 
Join Date: Jan 2010
Location: Here
Hunt In: The wilderness where the wild things are doing wild things.
Default

43 miles / 70 MPH = 0.614 hours per trip
0.614 * 60 minutes = 36.857 minutes per trip
36.857 * 2000 RPM = 73,714.2857 driving RPM
73,714.2857 + (500 RPM idle * 7 minutes idle time) = 77,214.2857 total RPM per trip
1,000,000 / 77,214.2857 = 12.951 trips before failing
highspeed is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:49 PM   #30
Chew
Pope & Young
 
Chew's Avatar
 
Join Date: Oct 2006
Location: Kingwood, TX
Hunt In: Leon County
Default

Hangin' round the trailer shop by myself

And I had so much time
To sit and post about myself

And then there it was
Like tachometer mental pie

Yeah there it was
Like speedo superfly

I smell math and candy here

Who's that laughing at my missing hair?

Who's that casting devious threads in my direction?

Trailer boss this surely is a dream

Yeah online date this surely is a dream

Yeah hunters this surely is a dream.
Chew is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:52 PM   #31
adam_p
Ten Point
 
adam_p's Avatar
 
Join Date: Sep 2011
Location: Pilot Point
Hunt In: Cooke, Denton, Oklahoma
Default

Quote:
Originally Posted by highspeed View Post
43 miles / 70 MPH = 0.614 hours per trip
0.614 * 60 minutes = 36.857 minutes per trip
36.857 * 2000 RPM = 73,714.2857 driving RPM
73,714.2857 + (500 RPM idle * 7 minutes idle time) = 77,214.2857 total RPM per trip
1,000,000 / 77,214.2857 = 12.951 trips before failing


F
adam_p is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:52 PM   #32
hpdrifter
Ten Point
 
Join Date: Sep 2014
Location: kerens
Hunt In: anywhere I can
Default

Quote:
Originally Posted by highspeed View Post
12.9 Trips @ 70 MPH so it'll fail on the way to work
11.9 Trips @ 80 MPH so it'll fail on the way home
Na, one trip is to and fro. to work would be <.5 to home would be >.5
hpdrifter is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:52 PM   #33
Dugie
Ten Point
 
Dugie's Avatar
 
Join Date: Oct 2006
Location: Tyler
Hunt In: Ireland, TX
Default

Quote:
Originally Posted by highspeed View Post
43 miles / 70 MPH = 0.614 hours per trip
0.614 * 60 minutes = 36.857 minutes per trip
36.857 * 2000 RPM = 73,714.2857 driving RPM
73,714.2857 + (500 RPM idle * 7 minutes idle time) = 77,214.2857 total RPM per trip
1,000,000 / 77,214.2857 = 12.951 trips before failing
round trip is 86 miles.

43 is one way.

half your numbers.
Dugie is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:53 PM   #34
hntndawg
Ten Point
 
hntndawg's Avatar
 
Join Date: Oct 2006
Location: Kendalia
Hunt In: Kendalia
Default

Quote:
Originally Posted by highspeed View Post
43 miles / 70 MPH = 0.614 hours per trip
0.614 * 60 minutes = 36.857 minutes per trip
36.857 * 2000 RPM = 73,714.2857 driving RPM
73,714.2857 + (500 RPM idle * 7 minutes idle time) = 77,214.2857 total REVOLUTIONS per trip
1,000,000 / 77,214.2857 = 12.951 trips before failing

You forgot to take in to account the time it takes him to get to and from 70mph (80).

And OP forgot to include the color of his left fender, because that would have cleared it right up.
hntndawg is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:53 PM   #35
LakeJake
Ten Point
 
LakeJake's Avatar
 
Join Date: Sep 2011
Location: Lewisville, TX
Hunt In: North TX and West AR
Default

Driving your commute at 70mph is more efficient, in terms of fewer motor revolutions per day.

Driving your commute at 70mph:
73.71 minutes at @2000RPM =147,420 revolutions
7 minutes @500RPM =3,500 revolutions

Driving your commute at 80mph:
64.5 minutes at @2500RPM =161,250 revolutions
7 minutes @500RPM =3,500 revolutions

70 MPH Commute = 147,240 + 3,500 =150,920 revs per commute
80 MPH Commute = 161250 + 3,500 =164,750 revs per commute

This of course excludes the range of speeds accelerating and decelerating.

In other words... PURPLE
LakeJake is offline   Reply With Quote Back To The Top
Old 10-14-2021, 01:56 PM   #36
highspeed
Ten Point
 
highspeed's Avatar
 
Join Date: Jan 2010
Location: Here
Hunt In: The wilderness where the wild things are doing wild things.
Default

Quote:
Originally Posted by adam_p View Post
FANTASTIC JOB
fify
highspeed is offline   Reply With Quote Back To The Top
Old 10-14-2021, 02:01 PM   #37
JBJTX81
Ten Point
 
JBJTX81's Avatar
 
Join Date: Dec 2013
Location: Wise Co
Hunt In: Where the wife gives me permission to go.
Default

Quote:
Originally Posted by adam_p View Post
F
Not an F! Based on the info given its the best approximation one could surmise. You're having to operate under the assumption that the truck instantly goes from idling to 70 mph and there is no acceleration nor deceleration at any point during the trip.
JBJTX81 is offline   Reply With Quote Back To The Top
Old 10-14-2021, 02:02 PM   #38
TxDispatcher
Ten Point
 
Join Date: Jan 2012
Location: Bellville, Tx
Hunt In: East Texas Pineywoods, Austin County
Default

Quote:
Originally Posted by Gumbo Man View Post
I’m coming up with 5 1/2 and 152. Oh hold on, what was the question?
Pffft...everyone knows that it's always 3.5 and 120
Quote:
Originally Posted by Lynn21 View Post
Burt Reynolds died.
Say it isn't so!!!
Quote:
Originally Posted by Chew View Post
Hangin' round the trailer shop by myself

And I had so much time
To sit and post about myself

And then there it was
Like tachometer mental pie

Yeah there it was
Like speedo superfly

I smell math and candy here

Who's that laughing at my missing hair?

Who's that casting devious threads in my direction?

Trailer boss this surely is a dream

Yeah online date this surely is a dream

Yeah hunters this surely is a dream.
You da man, Chew
TxDispatcher is offline   Reply With Quote Back To The Top
Old 10-14-2021, 02:04 PM   #39
adam_p
Ten Point
 
adam_p's Avatar
 
Join Date: Sep 2011
Location: Pilot Point
Hunt In: Cooke, Denton, Oklahoma
Default

Quote:
Originally Posted by JBJTX81 View Post
Not an F! Based on the info given its the best approximation one could surmise. You're having to operate under the assumption that the truck instantly goes from idling to 70 mph and there is no acceleration nor deceleration at any point during the trip.
No it is not.

The vehicle will never reach 1,000,000 RPMs. Its simply not possible, no engine, internal combustion or jet turbine can turn 1,000,000 RPMs.
adam_p is offline   Reply With Quote Back To The Top
Old 10-14-2021, 02:11 PM   #40
SB09
Pope & Young
 
SB09's Avatar
 
Join Date: Oct 2011
Default

I'd like to see an engine that is turning at 1mil RPMs...
SB09 is offline   Reply With Quote Back To The Top
Old 10-14-2021, 02:19 PM   #41
DaveC
Pope & Young
 
DaveC's Avatar
 
Join Date: Oct 2006
Location: Crosby,Tx
Hunt In: Kinney County
Default

Quote:
Originally Posted by Chew View Post
Hangin' round the trailer shop by myself

And I had so much time
To sit and post about myself

And then there it was
Like tachometer mental pie

Yeah there it was
Like speedo superfly

I smell math and candy here

Who's that laughing at my missing hair?

Who's that casting devious threads in my direction?

Trailer boss this surely is a dream

Yeah online date this surely is a dream

Yeah hunters this surely is a dream.


Good job, my brain started singing along 1/2 way through.


WOT is the only way to run an engine, it gets the oil pump pushing the oil harder which extends engine life.
That and some Slick-50 will screw your math all up.







Sent from my iPad using Tapatalk
DaveC is offline   Reply With Quote Back To The Top
Old 10-14-2021, 02:22 PM   #42
Graysonhogs
Pope & Young
 
Graysonhogs's Avatar
 
Join Date: Jan 2012
Location: Savoy, Texas
Hunt In: Fannin/Grayson/Erath
Default

No way to know without knowing tire pressure and what direction.


Sent from my iPhone using Tapatalk Pro
Graysonhogs is offline   Reply With Quote Back To The Top
Old 10-14-2021, 02:22 PM   #43
jshouse
Pope & Young
 
jshouse's Avatar
 
Join Date: Jul 2012
Location: Rockwall
Hunt In: NE Texas
Default

did yall hear that fat joe left atlantic?
jshouse is offline   Reply With Quote Back To The Top
Old 10-14-2021, 02:24 PM   #44
StrayDog
Ten Point
 
StrayDog's Avatar
 
Join Date: Nov 2010
Location: Funky Town
Hunt In: Coleman County
Default

Although it was stated 1 million rpms, I believe he meant the engine would fail after 1 million revolutions. While this is a hypothetical problem, think about this: at 70 mph running at 2000 rpm’s, your engine is turning 120,000 revolutions each hour you drive. So let’s say by some magical phenomenon, you only drive 70 mph. It would take 8.33 hours or 583 miles before the engine revolves 1 million times. 70 mph @ 2,000 rpms for 100,000 miles - the engine revolves 171,428,571 times.

Ok - back to doing math I get paid to do…

Last edited by StrayDog; 10-14-2021 at 02:52 PM.
StrayDog is offline   Reply With Quote Back To The Top
Old 10-14-2021, 02:27 PM   #45
JBJTX81
Ten Point
 
JBJTX81's Avatar
 
Join Date: Dec 2013
Location: Wise Co
Hunt In: Where the wife gives me permission to go.
Default

Quote:
Originally Posted by adam_p View Post
No it is not.

The vehicle will never reach 1,000,000 RPMs. Its simply not possible, no engine, internal combustion or jet turbine can turn 1,000,000 RPMs.
I see where you are coming from and I think my mind like most everyone else's when to 1mm R's
JBJTX81 is offline   Reply With Quote Back To The Top
Old 10-14-2021, 03:56 PM   #46
MadHatter
Pope & Young
 
MadHatter's Avatar
 
Join Date: Feb 2014
Default

Quote:
Originally Posted by SB09 View Post
I'd like to see an engine that is turning at 1mil RPMs...
Does it matter what kind of engine ?

https://www.livescience.com/3075-spi...llion-rpm.html
MadHatter is offline   Reply With Quote Back To The Top
Old 10-14-2021, 04:59 PM   #47
smokeless
Ten Point
 
Join Date: Aug 2009
Location: Minerva
Hunt In: Searching
Default

What kind of oil are you running.??
smokeless is offline   Reply With Quote Back To The Top
Old 10-14-2021, 05:28 PM   #48
ThisLadyHunts
Ten Point
 
ThisLadyHunts's Avatar
 
Join Date: Mar 2020
Location: Central Texas
Hunt In: Austin, Boerne, Wyoming, South America
Default

Quote:
Originally Posted by SabineHunter View Post
Ivermectin and zinc
Best answer yet!
ThisLadyHunts is offline   Reply With Quote Back To The Top
Old 10-14-2021, 06:17 PM   #49
Dr. Evil
Ten Point
 
Join Date: Jan 2008
Location: Leon Springs, Tx
Hunt In: Searching
Default

I think the truck is 4.5 years old.
Dr. Evil is offline   Reply With Quote Back To The Top
Old 10-14-2021, 06:19 PM   #50
dgilbert
Ten Point
 
dgilbert's Avatar
 
Join Date: Oct 2006
Location: Lake Granbury
Hunt In: Coke Co
Default

I'm not professional, can't help.
dgilbert is offline   Reply With Quote Back To The Top
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 02:35 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Copyright 1999-2012, TexasBowhunter.com