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and I hope you'll indulge me. I just have to tell somebody or I'll explode!

This afternoon I closed a deal to have a trailerable sailboat built according to my design ideas. it's built on a Potter 19 hull, but the sailplan and keel and deck layout are my designs. I didn't do all the engineering, of course, but the design ideas are all mine (except that I copied the ideas from other boats that have already been built.)

I'm so-o-o-o-o-o-o excited!

Here's the drawing:



Here's the stability curve:

Congrats on that, Judy!

What’s the turnaround time going to be on something like that? (Bet ya’ can’t wait). Tell us a bit about it - what design priorities did you change over the original layout? I assume time spent in a stock Potter led you to the ideas?

-Brian.

It's going to be a high performance sport version of the venerable pocket cruiser, the Potter 19, with a retractable sprit and a modern "Sport Boat" sail plan. Compared to the classic Potter 19, It's got a much heavier keel for increased stability range, a larger sailplan for more speed, and a bowsprit so it can fly a large asymm on a furler. Sail handling will all be from the cockpit.

I've sailed a Potter 19 for 15 years, in some very challengeing conditions. It's a great hull, ahead of its time, but the sailplan and foils are from the 1970's. The hull has the potential to be super fast, (as i proved 10 years ago when i became the first person to fly an asymmetric on it.) So I decided to bring the rest of the boat into the 21st Century, and incorporate 30 years of progress and innovation into a trusty old friend.

I hired Jim Antrim, a well respected naval architect in the San Francisco Bay area, to do the engineering for a new Potter 19, using the existing basic hull design, but incorporating my ideas on what the keel and rig should be like. I designed a new rig, deck layout, and sailplan. Jim Antrim figured out how to build the new keel to properly balance and complement the new sailplan. Jim also is doing the engineering to beef up the hull to handle larger loads. I hired Selden Mast to do the final engineering on the mast and rigging. Ken Lang,owner of International Marine, the Potter builder, designed the changes to the interior layout.

The Potter factory will start constructing the hull, deck and interior this week, and putting in all the wiring and what not. I'll be going down to the factory in southern CA after Xmas to "supervise" the production crew. I''ll be there to make sure they put the new hardware exactly where it belongs and make sure all the leads are fair and true.... and trouble shoot it as problems appear. It's not possible to get it perfect on paper the first time, so I'll have to actually lay it out on the deck and mark the positions for them. With a full crew, we should be able to install the whole deck layout in 4-5 hours. I'm sure I'll be the bottleneck.

I'll also be watching as they add the new structural bracing in the hull and talking with the architect if we run into any problems during assembly,install the chain plates for the rig in the right places and install some of the deck hardware and retractable bowsprit according to my sailplan and design. I'll probably supervise the fairing of the keel personally , because the production crew hasn't ever faired a keel before and I have. But other than that, they'll do all the work and I'll be there to make decisions when decisions need to be made.

I'll probably be a nervous wreck by time we're done

The mast will arrive in january, so I'll be on my own installing it and fitting the new standing rigging. Selden will send it with swaged fittings on one end, and Norseman terminals on the other. I'll probably me a nervous wreck by the time I'm done with that too.

Fair winds,
Judy B

I've seen Jim Antrim's boats reviewed (favourably ) by Robert Perry of "Perry on Design" fame in Sailing Magazine (a great column). Looks like you've done a lot of planning and homework for this project - it's going to be all your "baby".

I think you'll be turning a lot of heads with it. Make sure the stern is attractive. I think that's what most of the other boats in the race might be seeing most of.

A lot of work ahead for you - good luck Judy!

- Brian.

What a wonderful project!
Modifying and improving an existing design is always much more fun than just buying a new boat.
Good luck with it Judy.

Octaman

An important point. LOL

seahouse wrote:I've seen Jim Antrim's boats reviewed (favourably ) by Robert Perry of "Perry on Design" fame in Sailing Magazine (a great column). Looks like you've done a lot of planning and homework for this project - it's going to be all your "baby".

I think you'll be turning a lot of heads with it. Make sure the stern is attractive. I think that's what most of the other boats in the race might be seeing most of.

A lot of work ahead for you - good luck Judy!

- Brian.

Congratulations on a very exciting project. I do hope you will post some photos when it is completed. All the best to you, Judy.

You didn't mention who is supplying the sails

Just one more person who can't wait for good weather next spring!

Congratulations,

Willy

Hi Judy,

Fantastic! What an amazing project! Can you explain a bit about the keel design and weight? What is the total sailplane area?

Also--what is this costing if you don't mind my asking, and what is the manufacturing technique for the hull?

Matt

Whipsyjac wrote:You didn't mention who is supplying the sails

Just one more person who can't wait for good weather next spring!

Congratulations,

Willy

We don't have solid water where I live.

I'll be sailing it in early Feb on San Francisco Bay, if it isn't raining, for the shakedown. Heck, I'll be sailing it for shakedowns even if it IS raining.

I'll be taking it in Mid-February to the Havasu Pocket Cruiser Convention at Lake Havasu, AZ. It doesn't rain much in the middle of the desert.

Judy

mastreb wrote:Hi Judy,

Fantastic! What an amazing project! Can you explain a bit about the keel design and weight? What is the total sailplane area?

Main 107 (but I reduced roach slightly after calculating this)
150% Genoa 125
Jib 85
Spinnaker 300

Empty displacement 1624#
Total ballast 260 kg/672#
Draft at typical displacement = 49.33"

Typical displacement with 2 crew and 150 pounds of stores: 2124#
RM30 at typical displacement = 4.72 kN-M
Angle of vanishing stability = 101*

Maximum displacement with 4 crew and 500 pounds of stores: 2824#
RM30 at max displacement = 5.45 nK-M

Angle of vanishing stability = 101*, which far exceeds the ORC guidelines of 90* for offshore sport boat racing. The requirement for monohulls is 103*. (but the LOA is too short to meet guidelinesI think)

Personally I like the hard shine of the Potter 19, I better like the off set Swing keel under setee under port side on the Sanibel 18. Potter has the daggerboard in center of cabin and in the way of cabin space and if bringing it up will spill water top of trunk as you know.
SW florida you need the shallow draft and bottom out on a even keel.
I like the Sanibel 18 but if it was a hard shine would be a big hit as with the soft shine it's tender until you get the 15 degree heel, not so with the Potter 19.
Even the Compac 19 is a great design if it was a centerboard with off set .
I have done extentive Sailing in my previous CP16, CP19 and Potter 19.
Just my thought of Trailer sailers in thin waters.
The Mac.X fits all the requirements for us.
Hope it works out for you.
Dave

Judy B wrote:and I hope you'll indulge me. I just have to tell somebody or I'll explode!

This afternoon I closed a deal to have a trailerable sailboat built according to my design ideas. it's built on a Potter 19 hull, but the sailplan and keel and deck layout are my designs. I didn't do all the engineering, of course, but the design ideas are all mine (except that I copied the ideas from other boats that have already been built.)

I'm so-o-o-o-o-o-o excited!

Here's the drawing:



Here's the stability curve:

Best of luck with this! I researched buying a bare hull from the factory, before getting my M model. I was going to use a lug rig with it, going the opposite way you are rig wise. Unstayed mast, very carefree to sail. Might have added a few refinements over the rig on my V22.2
Ix

Hi All
Judy thats great that u will be there when the boat is being built & modified , when people ask me how can u remember where all ur lines go & which ones to grab @ the blink of an eye I tell them I designed it or copied it & modified it to fit my boat & then installed it , so without even thinking about it while sailing u just reach & work the said lines without any thought process involved it just comes to u automatically which & where specific lines r , also if u end up with a twisted or knotted line jamming up on u which should not happen !! as u rigged the boat u will have a good idea where the problem lies .
Yes its nice to have something u designed & modified & made , just makes u feel so proud when sailing her or when people come up to u & say where did u get that boat I have never seen one like that before & u can say thats right it's a first one & only
Is that going to be a canted keel or r u going fixed & maybe using leeboards just curious as to ur thoughts also I hope u r going to post some sea trails for us guys stuck on the solid water !

Congrats & we r all looking forward to hearing about ur future adventures with this nice boat

J