Author Topic: MOTO MATHS: We can work it out ...  (Read 14254 times)

0 Members and 2 Guests are viewing this topic.

Offline Berwick Boy

  • B-Grade
  • ***
  • Posts: 164
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #15 on: May 22, 2014, 08:01:33 pm »
I know it's simple maths ... but in my opinion it's fun.  As a kid, I'd often work out actual
CCs of a bike, when reading bore and stroke in brochures.  I like numbers  :)
(And apparently we need to do this stuff from this age on, or otherwise it's Sudoku)


Offline Mick D

  • Legend
  • *****
  • Posts: 2915
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #16 on: May 22, 2014, 08:01:53 pm »
No. ONE:
   In November, 1970, a Yamaha RT1 Enduro is cruising highway at 5,700 RPM, and sits on 95 kph.

Question:  How far does it travel (in metres) per single revolution of the crankshaft?
0.2777777778 meters traveled per crank revolution
That would be metre not meter. Just sayin'  :P :P :P ;D ;D ;D

The unit is very important  :D

Get with it Greg, there is no such thing as an Aussie spell checker ::) ::)

Ask Denny boy and Greggy Holmes if you don't believe me ;D
"light weight, and it works great"  :)

Offline Mick D

  • Legend
  • *****
  • Posts: 2915
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #17 on: May 22, 2014, 08:05:03 pm »
I know it's simple maths ... but in my opinion it's fun.  As a kid, I'd often work out actual
CCs of a bike, when reading bore and stroke in brochures.  I like numbers  :)
(And apparently we need to do this stuff from this age on, or otherwise it's Sudoku)



Yeah, me too,,,,I wish I had a bigger bank account to do it with though;D ;D ;D

That's a good sketch, cracks me up ;D ;D ;D
and I didn't need the spell checker to type that Scrivo ;D ;)
"light weight, and it works great"  :)

Offline HVA61

  • Legend
  • *****
  • Posts: 627
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #18 on: May 22, 2014, 08:08:11 pm »
Me too
Autos are the way forward , see you round like a robot
Take the short cut, go Cross Country
The shortest distance between two points is Cross Country
CCM's and HL's bark like mad dogs

Offline Mick D

  • Legend
  • *****
  • Posts: 2915
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #19 on: May 22, 2014, 08:10:05 pm »
Measured in pascals(N/m2) how much spring tension(force) does a circlip require to retain a set of Montesa fork dampers ;D
"light weight, and it works great"  :)

Offline Mick D

  • Legend
  • *****
  • Posts: 2915
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #20 on: May 22, 2014, 08:12:35 pm »
And I want to see an honest answer up here, by the time I get back from the bottloe
"light weight, and it works great"  :)

Offline Snowy 76

  • Legend
  • *****
  • Posts: 566
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #21 on: May 22, 2014, 08:27:56 pm »
OUCH!!
Couple of CR`s

Offline Tim754

  • Legend
  • *****
  • Posts: 4011
  • Northern Country Victoria
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #22 on: May 22, 2014, 08:55:55 pm »
Isn't pascals the unit of air pressure? Kilo-pascals, or naa that be a Latin American axe murderer. n/m2 maybe Newton /metres Squaredances.

Sorry it's these great night time Flu pills  6 of um an shites I be feelin bloody finnnnnnne nows                      .. 8)
I may not agree with what you have to say, but I'll defend to the death your right to say it.
                                                   Voltaire.

HeavenVMX

  • Guest
Re: MOTO MATHS: We can work it out ...
« Reply #23 on: May 22, 2014, 08:57:22 pm »
Measured in pascals(N/m2) how much spring tension(force) does a circlip require to retain a set of Montesa fork dampers ;D
carried out an RCA on the fork remains to determine what happened. As usual at least three things came together to give the Ohhhh Far...........k moment. If any any of those had been eliminated there would have been no ouch moment.

That crash makes two wacks (or whacks whichever you prefer) on the head in a little over a year, remember the working bee incident ::)  :'( when you craddled my head as I flaked it and fortunately I came too just before you launched into mouth to mouth :o :o :o :o

To answer your question? ideally for circlip that size about 560 kp/mm2 but as low as 480 kp / mm2 should do the job

note the unit kilopascal/millimetre2  ;D :-X

The ones in the GP Monty forks appear to have had 1 kp/mm2  :o :o

At least I didn't fall (pun intended) for the old I'm completely stuffed so I'll do just one......... more la......p  ;)  crash :-[ :o  ;D ;D ;D ;D ;D ;D jokin OK
« Last Edit: May 22, 2014, 09:32:20 pm by HeavenVMX »

Offline Berwick Boy

  • B-Grade
  • ***
  • Posts: 164
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #24 on: May 22, 2014, 09:29:44 pm »
Another numerical topic.  If working out historical costs - to see what
it costs in today's money - I use a very rough estimate of doubling the money for every
decade.

IE:  If a DT1 cost $650 in 1970, then I'd double that for every decade

1970  $650
1980  $1300
1990  $2600
2000  $5200
2010  $10,400  (holds fairly true)
2020  $21K   (fails ..?  I don't think a YZF will reach this)

Offline Mick D

  • Legend
  • *****
  • Posts: 2915
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #25 on: May 22, 2014, 09:33:03 pm »
Bizzzzzzzzzzzzzzzzzzzz, sort of wrong boys :'(
Isn't pascals the unit of air pressure? Kilo-pascals, or naa that be a Latin American axe murderer. n/m2 maybe Newton /metres Squaredances.

Sorry it's these great night time Flu pills  6 of um an shites I be feelin bloody finnnnnnne nows                      .. 8)
About time you sacked that doctor Tim ;D ;D ;D

Measured in pascals(N/m2) how much spring tension(force) does a circlip require to retain a set of Montesa fork dampers ;D
carried out an RCA on the fork remains to determine what happened. As usual at least three things came together to give the Ohhhh Far...........k moment. If any any of those had been eliminated there would have been no ouch moment.

That crash makes two wacks (or whack whichever you prefer) on the head in a little over a year, remember the working bee incident ::)  :'( when you craddled my head as I flaked it and fortunately I came too just before you launched into mouth to mouth :o :o :o :o

To answer your question? ideally for circlip that size about 560 kp/mm2 but as low as 480 kp / mm2 should do the job

note the unit kilopascal/millimetre2  ;D :-X

The ones in the GP Monty forks appear to have had 1 kp/mm2  :o :o

At least I didn't fall (pun intended) for the old I'm completely stuffed so I'll do just one......... more la......p  ;)  crash :-[ :o  ;D ;D ;D ;D ;D ;D jokin OK

We are  governed by the metric system in this country and as a base line for the scientific community, as such "The unit of tension is the same as the basic unit of force" Its one of those ambiguities.

A pascal is a measure of force, pressure or tension per unit area, defined as one newton per square meter, whoops metre ::).

You will argue all your life long, but the unit of spring tension is correctly measured in pascals. Although because One Pa = one N/m2, you will find that most say for example suspension guys will quote in N/m2.
Nut indeed the Scientific community chooses and does quote spring tension in Pa(Pascals)

"light weight, and it works great"  :)

Offline Lozza

  • Legend
  • *****
  • Posts: 4206
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #26 on: May 22, 2014, 09:34:42 pm »
Top Fueler needs 120hp to drive the fuel pump and 600hp to drive the blower. Pistons cost $60 each plugs $2
Jesus only loves two strokes

Offline Mick D

  • Legend
  • *****
  • Posts: 2915
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #27 on: May 22, 2014, 09:52:55 pm »
At least I didn't fall (pun intended) for the old I'm completely stuffed so I'll do just one......... more la......p  ;)  crash :-[ :o  ;D ;D ;D ;D ;D ;D jokin OK

Yeap some stuff we just have to live with ::) ::), like flipping your bike on the start line ::) some turtles just aren't ever gunna let ya forget >:( ::) ???  ;D ;D ;D
"light weight, and it works great"  :)

HeavenVMX

  • Guest
Re: MOTO MATHS: We can work it out ...
« Reply #28 on: May 22, 2014, 09:53:10 pm »
I stand corrected. Meter it is! Never liked the way metre was pronounced anyway  :-X
Enjoy your new Maico
« Last Edit: May 22, 2014, 10:09:44 pm by HeavenVMX »

Offline Mick D

  • Legend
  • *****
  • Posts: 2915
    • View Profile
Re: MOTO MATHS: We can work it out ...
« Reply #29 on: May 22, 2014, 10:51:38 pm »
Gee, apologies to your thread with my drivel Berwick Boy ::) ::) :-[

Never liked the way metre was pronounced anyway  :-X
Enjoy your new Maico
Thanks, I am excited to be picking this Maico up tomorrow. Its a beautiful goer ::)

I have never accepted the way the  French Academy of Sciences imposed the their way of spelling Metre upon the rest of us, just because it was their concept, wankers.

Educations vary, even in the same country.
That is what I recalled
Just found this,
Link to Unit of tension

Goodnight :) 
« Last Edit: May 22, 2014, 11:16:14 pm by Mick D »
"light weight, and it works great"  :)