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The Temptress Design Phase Draws to a Close

Over the last month work has continued well on the design of Temptress. We now have the entire boat modelled and a custom hardware kit designed to complement her lines. The driveline has been installed, a V-drive unit will accommodate an Ilmor V8 up to 365hp. We are also looking into suitable powering options for Diesel. Electric propulsion is also an area we are exploring with the design and we are looking at what might be needed within her structure to accommodate this type of system.

The Enlarged Cockpit Arrangement

Below you can see the new cockpit arrangement. A large open cockpit with bucket seats forward will allow for individual adjustment to suit driver and passenger. The rear bench seats will accommodate up to an additional 4 passengers and provide large storage lockers below. There is further storage below the foredeck and in easily accessible foot lockers.

Standard cockpit arrangement.

Customisations

Temptress, whilst custom in her basic form, offers a base from which to further tailor a boat to suit the clients needs. Her cockpit arrangement, hardware packs, upholstery and finish can be reworked to meet a range of different tastes, styles and requirements.

So far we have generated representations of the boat with varnished and painted topsides as well as varnished and upholstered sealing boards. Next we are modelling a wood framed windscreen option that will accommodate a running canvas in order to keep the occupants dry in foul weather.

Specification

Dimensions

  • LOA: 24′ / 7.3m
  • Max beam: 7’10” / 2.38m
  • Dry displacement: Approx 4000lbs / 1814kgs
  • Seats: 6

Powering

  • Ilmor petrol V8 320-365hp
  • Yanmar or Volvo diesel
  • Electric
  • Driveline: V-drive inboard
  • Fuel: Approx 50 gallons

General

  • Hull: mahogany
  • Finish: bright varnish or paint
  • Fittings: stainless steel
  • Upholstery: marine leatherette

Kitting the Boat

We will shortly begin work on kitting the boat. This process will involve setting up the boat for construction, designing the strong back system for building, jointing the frames, creating assembly jigs and compiling material lists. After this stage we should have a more definitive idea of kit costing. We will also begin looking into costing to produce her custom hardware kits.

Availability

Temptress will be available to purchase as a complete, commission built boat or as an extensively planned kit, aimed at advanced to professional level boat builders.

We hope to have this design available from late 2021; more details of her design will follow on as we progress with the work. If you would like to register an early interest to discuss pre-ordering a boat or kit then please feel free to contact me.

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A Classically Styled Modern Wooden Runabout

Modern wooden powerboat tender yacht tender and runabout Temptress IV

I am excited to present to you the early stages, and a little preview, of the latest design collaboration between myself and Berryer Design & Manufacturing. Michel Berryer and I have been working together since he helped me with the design of the rudder system utilised on Miss Isle. Since then, among our conversations I had expressed that I would like to put together a design for a new, modernised, classically-styled runabout. I have always leaned towards older designs because I love classic lines, and wood of course. The issue I face with my current approach in recycling old plans and designs from this period is that their hull shape and build methods are now somewhat outdated. However our latest venture to design an all new, modern wooden runabout is set to change things…

Since the early days of wooden runabouts, as you would expect, technology and design in several respects has advanced. Perhaps most notably, engine power and weight. Today we are seeing a standard V8 engine, comfortably producing 3-4 times the power it did some 80 years ago and at a reduced weight. Many old design, re-powered classic wood runabouts were simply not set up to accommodate such power.

In conjunction with that we have seen advancements in the way wood can be used in modern wooden boat building. Gone are the days of swelling bottoms, bilge pumps that run all day and varnish that needs topping up every season. Utilising modern construction techniques and materials, dimensionally stable wood boats can be built that are capable of rivalling their composite competitors in their maintenance and strength to weight ratios. More and more manufacturers are turning back towards building boats from wood again, and that’s what I like to see!

Temptress’ modern wood construction will ensure a strong, lightweight, low maintenance wooden boat that bears a far greener carbon footprint throughout her lifetime when compared to similar boats of fibreglass construction.

History of this Design

Temptress is a design that was first produced by Michel Berryer back in 1995 and had sat in his archives since then. Upon expressing an interest in putting together a new-classically styled runabout, Michel sent me the original lines for the boat which I immediately fell in love with.

Before beginning work Michel said he would like to re-visit this design and start over. He is currently in the process of producing a completely new hull from the ground up, that picks up the styling elements of the original.

Original 1995 lines.

“Temptress is to be a vessel with panache that harkens to a time of grace and opulence and yet delivers modern conveniences and performance with a smooth, dry ride.”

Michel berryer

Her new hull incorporates chine flats, convex bottom sections and a deadrise of approximately 12°. This combination makes the boat a good candidate for any of the grand lakes. She is also large enough, with sufficient freeboard to be comfortable and feel safe at sea or in rougher weather.

The new design will see the engine hatches moved aft to create a more spacious open forward cockpit. Seating will come in the form of a bench seat aft and two bucket seats forward. Her beam has also been increased from the original design to give further space in this area. A large storage area under the foredeck will comfortably accommodate life jackets, ropes, fenders, covers and passenger luggage to keep things tidy.

Temptress will be set up with easily accessible lifting points, making her the ideal candidate for hauling up on to the foredeck or tender garage of a large yacht. She can be quickly launched and used to run errands ashore from larger vessels. The option of electric power could also be utilised with a charging facility provided by her mothership. She is small and light enough to be trailered and launched by a large 4×4 or SUV making her suitable for an everyday launch.

Specification

Dimensions

  • LOA: 24′ / 7.3m
  • Max beam: 7’10” / 2.38m
  • Dry displacement: Approx 4000lbs / 1814kgs
  • Seats: 5

Powering

  • Ilmor petrol V8 320-365hp
  • Yanmar or Volvo diesel
  • Electric
  • Driveline: V-drive inboard
  • Fuel: Approx 50 gallons

General

  • Hull: mahogany
  • Finish: bright varnished
  • Fittings: stainless steel
  • Upholstery: marine leatherette

We are currently in the closing stages of the new hull design which you can see below. The next stage will see the cockpit and engine hatch layouts follow on. The dash, console and seating will be modelled before moving on to working through her driveline. More details will follow as we progress with this work.

Availability

Temptress is available exclusively to buy through Dan Lee Boatbuilding. She will be available to purchase as a complete, commission built boat or as an extensively planned kit, aimed at advanced to professional level boat builders.

We hope to have this design available from late 2021; more details of her design will follow on as we progress with the work. If you would like to register an early interest to discuss pre-ordering a boat or kit then please feel free to contact me.

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Reverse Engineering a Propeller

This project was a great example of how modern technology can be used to reverse engineer obsolete components that are no longer readily available. In this instance Albatross Marine were running low on ‘new old stock’ of propellers that they supply for Albatross boats. They sent me one of their last stock propellers in order to have it reverse engineered and re-produced.

Scanning

First of all the propeller was 3D scanned. This was done to an accuracy of 0.25mm using a Shining 3D Einscan H, handheld 3D scanner. The 3D scanner is used to take millions of surface measurements to replicate the item and generate a 3D mesh.

AESUB 3D scanning spray was utilised in order to make the propeller easier to scan. This is a non-marking spray that turns shiny objects to a flat white finish, while only affecting their surface dimensions by a few microns. Within a few hours it evaporates with no need for cleaning and without leaving any trace on the part.

Reverse Engineering

The next stage of the process involved reverse engineering the propeller. In most instances this involves drawing a new component inside or over the top of the scan mesh. Some interpretation is often needed to overlook small errors in the scan data or defects in the original part that may not want to be replicated.

left – you can see the blade profile being replicated in Fusion 360. The mesh modelling environment has a ‘pull’ feature which allows you to stick the surface that you are modelling to the scan mesh. You can also see how the cast propeller surface is faired out.

Making Corrections

The part that you are scanning may sometimes be slightly different from what you actually need to make. In this instance just the hub and one of the blades were modelled, the one blade was then distributed around the central axis to give three perfectly balanced blades.

Finally the finished model was upscaled by a 1 in 65″ factor, as determined by the casting shop, in order to account for shrinkage during the casting process. This will ensure that the finished propeller is produced in the correct size. Tabs were also added to the hub to aid the casting process.

Re-production

The new propeller will be 3D printed, cast and machined to create new stock that will be available to buy through Albatross Marine.

Albatross Marine

Albatross Marine offer a full range of services for Albatross Boats – from a few rivets that need changing, to a complete rebuild. They also supply new old stock and re-production parts.

Follow the links below for more information or visit their website.


Contact Me

If you are looking to have a component 3D scanned and reverse engineered then please feel free to get in touch and we can discuss the best approach for your project.