Ker40 - latest IRC weapon?

[MKF]

Hull factor is a dynamic calculation, that not only takes into account quanitative observations from the boat data, but is also highly correlated to how full Mike Urwin's cup of coffee is. What ever you do make sure you don't get your certificate proceesed late on a Thursday when he is on his Nth cup of coffee...

My understanding is the at hull factor formula is:

[LOA/Disp^keel weight^log(depth)-(((number of berths+cabin doors)^(1/(depth of cushion mail salon - number of heads))/ number of spreaders]* percentage of coffee left in mikes coffee. This has been reverse engineered out over years of seeing our hull factorgo from 12.3 to 14.8!

Seriously!!

 

[doghouse]

hahahaa!

 

[Jambalaya]

So rather than distracting from the topic here Jambo (nice try @ changing the subject) can you let us know just how the HF is calculated or what is measured?

What is measured/used in the calculation is everything that is requested on the rating application. The rule favours seaworthy yachts, proper offshore yachts need berths and cooking facilities so there is consideration for the interior fit out over and above what is captured purely in the weight of the yacht. As has been posted many times the rating office came up with a sportsboat rule and a public grand prix public but no one really wanted one (and it was IRM boats which first brought Jason Ker to the fore), people raced OD or IRC.

 

[Jambalaya]

Hull factor is a dynamic calculation, that not only takes into account quanitative observations from the boat data, but is also highly correlated to how full Mike Urwin's cup of coffee is. What ever you do make sure you don't get your certificate proceesed late on a Thursday when he is on his Nth cup of coffee...

My understanding is the at hull factor formula is:

[LOA/Disp^keel weight^log(depth)-(((number of berths+cabin doors)^(1/(depth of cushion mail salon - number of heads))/ number of spreaders]* percentage of coffee left in mikes coffee. This has been reverse engineered out over years of seeing our hull factorgo from 12.3 to 14.8!

Seriously!!

MKF - we had a thread with formula's like this in it and a claim to have reverse engineered IRC once before - it didn't end well

 

[doghouse]

So rather than distracting from the topic here Jambo (nice try @ changing the subject) can you let us know just how the HF is calculated or what is measured?

What is measured/used in the calculation is everything that is requested on the rating application. The rule favours seaworthy yachts, proper offshore yachts need berths and cooking facilities so there is consideration for the interior fit out over and above what is captured purely in the weight of the yacht. As has been posted many times the rating office came up with a sportsboat rule and a public grand prix public but no one really wanted one (and it was IRM boats which first brought Jason Ker to the fore), people raced OD or IRC.

Unfortunately this is not the case, as good as their intentions may be.

These are proper cooking facilities.

 

[The Advocate]

What a crock, a gp boat can be just as seaworthy as a cruiser racer with all the bling, and in some cases more so. We have 10 berths, 3 burner stove with oven and a proper head, but we still get hit as gp. Boat has won a hobart and many thousands of offshore miles so there is no question about its sea worthiness.

 

[Steveromagnino]

So rather than distracting from the topic here Jambo (nice try @ changing the subject) can you let us know just how the HF is calculated or what is measured?

What is measured/used in the calculation is everything that is requested on the rating application. The rule favours seaworthy yachts, proper offshore yachts need berths and cooking facilities so there is consideration for the interior fit out over and above what is captured purely in the weight of the yacht. As has been posted many times the rating office came up with a sportsboat rule and a public grand prix public but no one really wanted one (and it was IRM boats which first brought Jason Ker to the fore), people raced OD or IRC.

Without distracting from the Ker, they did indeed come up with a sportsboat rule that rated boats basically exactly the same (or worse) as the IRC rule, and that's why it was the kiss of death, because it was a rule that favoured a 25 footer weighing 2 tons or a Platu weighing 1.2 tons and a sym kite, over a light weight smaller boat.

The modern SMS rule can fairly rate actual sportsboats ok and can handle all the potential issues that come up with an extreme boat, in a way that the old SBR rule could not.

And recently, I would say IRC is doing a pretty reasonable job as well for sporties, compared to before.

OK back to the scheduled program....GO THE KER!

 

[Jambalaya]

What a crock, a gp boat can be just as seaworthy as a cruiser racer with all the bling, and in some cases more so. We have 10 berths, 3 burner stove with oven and a proper head, but we still get hit as gp. Boat has won a hobart and many thousands of offshore miles so there is no question about its sea worthiness.

If the boat has won a Hobart it would imply it's reasonably rated ? Or are you talking purely line honours ?

 

[doghouse]

What a crock, a gp boat can be just as seaworthy as a cruiser racer with all the bling, and in some cases more so. We have 10 berths, 3 burner stove with oven and a proper head, but we still get hit as gp. Boat has won a hobart and many thousands of offshore miles so there is no question about its sea worthiness.

If the boat has won a Hobart it would imply it's reasonably rated ? Or are you talking purely line honours ?

It's only been an IRC race since 2004. The boat he speaks of won the race in 1999.

 

[Jason AUS]

What a crock, a gp boat can be just as seaworthy as a cruiser racer with all the bling, and in some cases more so. We have 10 berths, 3 burner stove with oven and a proper head, but we still get hit as gp. Boat has won a hobart and many thousands of offshore miles so there is no question about its sea worthiness.

If the boat has won a Hobart it would imply it's reasonably rated ? Or are you talking purely line honours ?

It's only been an IRC race since 2004. The boat he speaks of won the race in 1999.

He's talking about Yendys/Sting/Knee Deep? That's not a GP boat? Really?

 

[The Advocate]

What a crock, a gp boat can be just as seaworthy as a cruiser racer with all the bling, and in some cases more so. We have 10 berths, 3 burner stove with oven and a proper head, but we still get hit as gp. Boat has won a hobart and many thousands of offshore miles so there is no question about its sea worthiness.

If the boat has won a Hobart it would imply it's reasonably rated ? Or are you talking purely line honours ?

It's only been an IRC race since 2004. The boat he speaks of won the race in 1999.

He's talking about Yendys/Sting/Knee Deep? That's not a GP boat? Really?

I don't consider it to be GP, but IRC does, and posted what I did in the context of the discussion.

 

[Presuming Ed]

This one?

http://www.kneedeepwines.com.au/about-us/the-yacht/

/monthly_06_2011/post-419-056050600%201308095335_thumb.jpg

/monthly_06_2011/post-419-017010700%201308095334_thumb.jpg

 

[DickDastardly]

Yep, that's it. Of course it's a GP boat. It was a fully cocked IMS 49 at launch (1999), no expense spared. Farr design #447.

 

[doghouse]

It was definitely a GP boat at launch, as full on as it gets. I sailed on a couple sister ships here in the States. I am just happy to see in those pics on the website they put some proper kites on it! Even though one appears to have met it's maker...

The crux of the argument (I think) is that it isn't a GP boat now, but IRC treats it as such. Or something or other.

 

[The Advocate]

I mean not GP due to age, in relation to new IRC specific boats.

 

[Jason AUS]

I don't consider it to be GP, but IRC does, and posted what I did in the context of the discussion.

Absolutely, I know it was posted in context - it's just that the builder describes it as Grand Prix yacht and the co-owners's son describes it as "a 50 foot 100% carbon fibre purpose built racing yacht..."

Hijack over - so how about that new Ker 40?

:lol:

 

[The Advocate]

It was definitely a GP boat at launch, as full on as it gets. I sailed on a couple sister ships here in the States. I am just happy to see in those pics on the website they put some proper kites on it! Even though one appears to have met it's maker...

The crux of the argument (I think) is that it isn't a GP boat now, but IRC treats it as such. Or something or other.

Exactly.

 

[Two Tone]

This one?

http://www.kneedeepwines.com.au/about-us/the-yacht/

/monthly_06_2011/post-419-056050600%201308095335_thumb.jpg

/monthly_06_2011/post-419-017010700%201308095334_thumb.jpg

Memory Lane from when she was 'Bounder' for a year... (Not Jess, but hi!)

 

[MKF]

Guys - any pictures on Father Ted's new toy...should be in the water by now???!!!

 

[Presuming Ed]

Memory Lane from when she was 'Bounder' for a year...

What happened to the JK Bounder - the one the keel (not the front) fell off?