Noram Clutches

Graeme · Joined: 02 Nov 2001 Posts: 17

Does anyone know anything about these clutches... i.e what the different settings do and how they effect the kart?

Anything is a help,
Thanks!

Todd Godwin · Posted: Tue Nov 20, 2001 4:58 pm Post subject: Noram Clutches

At first they were Norams. Then I think they changed their name to Ratech but its the same clutch. They use a center hub with two projections. Then there are two shoes with slots in which the projections fit. The shoes are held in place by two springs and then theres a hub which fits around it all. You tune the clutch by putting the projections into different slots in the clutch, by using different weight springs and by using different weight shoes. This is a case where a picture would be worth a thousand words.

rich · Guest

The noram clutch is adjusted for engagement by changing the springs and shoes. Use stronger springs for more slip (higher engagement) weaker for less. The lighter shoes will have a higher engagement than the heavy shoes with the same spring. Noram has a sheet that list the different engagement combinations for springs and clutch shoes.

rich · Guest

The noram clutch is adjusted for engagement by changing the springs and shoes. Use stronger springs for more slip (higher engagement) weaker for less. The lighter shoes will have a higher engagement than the heavy shoes with the same spring. Noram has a sheet that list the different engagement combinations for springs and clutch shoes.

Graeme · Joined: 02 Nov 2001 Posts: 17

Thanks for the responce.

I found the type of chart you speak about... I was looking for Noram clutches all along while search engines seenm to pick up more for "Ratech". doh!

Anyway, I'm a little confused as to how to use this information.
It talks about one settings for "rapid engagement and low inertia starts" and the opposite for "gradual engagement and high inertia starts", with various settings in between.

How would you translat that into what happens on track.
does one work best for say, slow ocrners and the opposite for faster corners?
I'm a little confused about this.

Thanks a mill!

[ November 21, 2001: Message edited by: Graeme Brophy ]

Michael Polizzi · Joined: 18 Jul 2001 Posts: 1565

A low inertia start would be a rolling start: the clutch is set up to engage quickly as the clutch is already spinning (less likely to bog the motor)

A high inertia start would be a standing type start: cluth needs to engage slowly so as not to bog the motor.

The cluth needs to engage at or near the motors peak torque. so as not to bog down the motor.

A track with slow tight corners needs the clutch to slip and not load down the motor.

A wide open track with higher cornering speed can use a faster clutch engagement as you are always closer to yor peak power band.

Michael Polizzi69n
Full Bore Karting

Hance Lord · Joined: 30 Oct 2001 Posts: 44 Location: Afghanistan,

quote:
Originally posted by Graeme Brophy:
Does anyone know anything about these clutches... i.e what the different settings do and how they effect the kart?

Anything is a help,
Thanks!

You can read a copy of the setup that comes on the box at... http://user.fundy.net/barrettm/Noram%20Clutch%20tips.htm

Graeme · Joined: 02 Nov 2001 Posts: 17

Thanks a million guys...

So I think I've got this:
For tight cornered tracks you need it to engage gradually so you'd use a "high inertia" settings.
Hmmm... that might explain some things... thanks.