kangaroo paw...

[Matty]

just perusing your website and the new paw design rotor. This looks very similar to something you did a couple of years ago, but under a different name.

do you have any stats on the claimed improvements, eg air volume flow rate vs rotor speed, reduction in rotor temperature in benchmark tests, etc?

you claim a "20% improvement in efficiency", can you quantify exactly what you mean by 'efficiency', and what the numbers actually are?

I'm also curious about the comment that it "works on the same principal as an air-impeller, designed to extract hot air". As far as I can tell, every vented rotor has always worked on this principal, and nearly every air impeller I've seen uses full-length vanes. (the only difference being the aim to remove heat from said vanes, in which case I can see the advantage in increasing the turbulence.)

:)

[dbasteve]

Originally posted by Matty
just perusing your website and the new paw design rotor. This looks very similar to something you did a couple of years ago, but under a different name.
Yes. this was the first version, but quite different to what we do now.


[i]
do you have any stats on the claimed improvements, eg air volume flow rate vs rotor speed, reduction in rotor temperature in benchmark tests, etc?[/B]
Yes, The details are confidential, but this design was derived from stats compiled by ourselves, UNSW, and an independant Engineering consultancy firm that does work for Ford and GMH.


[i]
you claim a "20% improvement in efficiency", can you quantify exactly what you mean by 'efficiency', and what the numbers actually are?[/B]
By efficiency it is meant that under the same conditions, heat load input, and rotational speed that the pillar design is more efficient in expelling heat from the iron mass. This was done using CFD simulation. It's all about surface area and the ability of the design to take advantage of the volume of air passing through.


[i]
I'm also curious about the comment that it "works on the same principal as an air-impeller, designed to extract hot air". As far as I can tell, every vented rotor has always worked on this principal, and nearly every air impeller I've seen uses full-length vanes. (the only difference being the aim to remove heat from said vanes, in which case I can see the advantage in increasing the turbulence.)

:) [/B]
A very generalised description for easy understanding

[T-BONE]

Will you be applying the Kangaroo Paw technology to all your rotors now (eg can i order my rotors with the Kangaroo Paw)? And will race cars such as the V8 Supercars use the technology?

[dbasteve]

Originally posted by T-BONE
Will you be applying the Kangaroo Paw technology to all your rotors now (eg can i order my rotors with the Kangaroo Paw)? And will race cars such as the V8 Supercars use the technology?

At the moment only new products and some older popular stock have or will be done.

At the moment this technology is only used for discs up to 330mm diameter.
The larger 375mm x 35mm V8 supercars discs would require a full assessment of the suitability for this application and approval for use by the governing bodies.

Proving that this design works for performance street and certain track applications does not qualify it for this type of use (V8 SuperCar). The correct validation procedure needs to be undertaken to ensure suitability.

[T-BONE]

The V8 Supercars run a 17x9" wheel I believe. How do they manage to fit 375mm discs under there? Is it possible for me to fit that size under my HSV VR Clubsport wheels? And if I can't what else dictates what size rotor you can fit apart from the wheel diameter?

[dbasteve]

Originally posted by T-BONE
The V8 Supercars run a 17x9" wheel I believe. How do they manage to fit 375mm discs under there? Is it possible for me to fit that size under my HSV VR Clubsport wheels? And if I can't what else dictates what size rotor you can fit apart from the wheel diameter?

The AP Racing calipers have a very low profile on the diameter which would allow them to fit.
Wheel size is pretty much the limiting factor and of course you need room for the width of the caliper which is around 160mm.

The new Monaro GTS has a 362mm AP Kit option which may be a little less hassle to fit.

[Matty]

thanks steve. :)

out of curiosity, does any other brake company use a similar design? I wouldn've thought Brembo et al, and numerous race teams would have been all over this years ago if there was an appreciable benefit...

[dbasteve]

Originally posted by Matty
thanks steve. :)

out of curiosity, does any other brake company use a similar design? I wouldn've thought Brembo et al, and numerous race teams would have been all over this years ago if there was an appreciable benefit...

Brembo use a pillar type system in some of their performance product. E.G Nissan Skyline GTR, Subaru STi 2002, Supra, ect

A few companies use a round column system.

Most of these designs are tied up by patents too.