Mills 41

330,000 | Hong Kong Hong Kong


  • Make Mills
  • Model 41
  • Year 2016
  • LOA 41ft/12m
  • Class Performance Sail
  • Hull Foam Core Epoxy
  • Keel Fin Keel
  • Rig Sloop
  • Layout Aft Cockpit
  • Berths 8
  • Ancasta Ref 36490
  • Name AMBUSH


AMBUSH is an IRC41 from Mark Mills, launched in 2016 having been built by McConaghy Boats.
With a detailed understanding of the IRC rule, this FAST 40 style racer was penned with a more offshore focus, whilst maintaining similar characteristics to the inshore flyers that we have seen taking IRC by storm over recent years.
During her 4 year spell in Asia she has been one of the standout boats and with twin wheels, pedestal and Hall Spars rig there is a lot to like.
This really is a FAST 40 concept that offers owners true offshore potential in its DNA, with increased freeboard, minimal through deck penetrations and a powerful reaching hull-form.
Get in touch to find out more.


AMBUSH - Mills 41 IRC Design
Builder: McConaghy Boats China.
LOA: 12.52m
LH: 10.94
Displacement: 4464kg
IRC TCC: 1.236 (2020)

Hull built on male mould. Deck built over jigs.
E glass, core cell foam cored, resin infused Epoxy Construction
Autoclaved prepreg carbon rudder stock
Autoclaved prepreg carbon bow pole (removable)
Carbon keel internal structure
SG iron keel fin strut and lead bulb

From the designer Mark Mills: The design process involved a comprehensive CFD driven VPP study with our research partners KND / Sailing Performance, looking at multiple hull shape options, foil configurations, and sail plan sizes. This work built on our previous studies for new designs based on increasing form stability when heeled, resulting in significant gain upwind in a breeze. The focus for this design was to ensure these gains could be combined with strength in light/medium airs, as well as breezier conditions offshore in events like the Vietnam Race. Since these ambitions are not always mutually compatible, it became clear that including as much modabilitiy as possible into the basic boat would offer a range of benefits: firstly it provides the client a far wider range of competitive configurations by adjusting the key components of Draft, Displacement, Trim, and Sail Area. Secondly in the light of the IRC rule’s transition in recent years towards accommodating lighter faster designs including wide mode'able ranges in as many parameters as possible opens up the ability to respond to future rule adjustments flexibly, extending the competitive life of the boat. Thirdly it allowed the basic hull shape to deliver a wider range of possibilities for other clients looking to optimise future builds of the design more significantly for different conditions.

Engineering partner SDK of Rhode Island is one of the worlds leading composite raceboat engineers with prominent TP52 and Mini-Maxi designs as well as the current America’s Cup holder. They have produced a refined structural layout with a focus on weight reduction, global stiffness, and ease of movement internally, resulting in a simple interior with features such as a basic galley and cooler stowage on either side of the mast, Nav seat on the engine box, and a head to Starboard forwards adding offshore functionality.

Hull 1 in particular reflects the lead clients desire to keep the boat very simple and offshore-friendly, combining a rating conscious e-glass/epoxy/foam hull and deck construction with carbon in the high load keel structure to reduce weight and increase stiffness.

Spars & Rigging

AMBUSH is fitted with a carbon rig and boom package from Hall Spars NZ.

The rig is high modulus construction with all the usual refinements.
2-spreader setup and Nitronic rod standing rigging.
The boat is fitted with running backstays to allow the large square top mainsail.
Fixed carbon bowsprit with bobstay and 2:1 tackline ability.

AMBUSH has reefing capability for offshore and a cascade vang system.

Halyard arrangement is as follows;
2 masthead kite halyards
2 fractional halyards, one jib one kite
External arrangement for jib staysail
Load cell on forestay
Take down system

Sail Inventory

- 2020 Quantum 1 reef main, in build
- 2018 CSF J1
- 2020 Quantum J2
- 2020 Quantum J3 in build
- 2016 CSF J4
- 2019 Quantum A1 & A2
- 2018 CSF A3
- 2020 Quantum Cableless Code 0
- Spin Staysail CSF

- Main 3 reefs CSF 2017
- Delivery short hoist main
- Storm jib & trysail
- J1
- Light Weight VMG
- Heavy air A2
- Fractional A4
- Jib Top (cable or foil hoist)
- Jib Staysail
- Staysail


Instruments are B&G H5000 including a touch screen plotter.
Iridium Go
Laptop set up for the boat with Expedition.

4*2020s on mast
2* graphic displays in cockpit
Lithium house batteries
Rudder angle sensor

Deck hardware is Harken throughout
Pit, main winches Harken 50.3
Runners Harken 50.2
Primary Lewmar 60.3 with 2.4:1 top speed - pedestal driven.
Spinnaker take down system.


CAT 1 safety compliant (no guarantees to service dates)

Interior lighting LED,
Fans at Nav station and on bunks
2 Primus burners
Mesh pipe cots x 8
Full boat cover.

Spare mast jack, various blocks, training / delivery sails, extra VHF, Sat phone for grab bags etc etc

Finance Calculator

Ancasta are acting as brokers for the vendor who is not selling in the course of business unless otherwise stated. These details are prepared from information provided by the vendor and are intended only as a guide to give a fair description of the vessel but their accuracy cannot be guaranteed and they do not constitute part of any contract. A prospective buyer is strongly advised to check the particulars and to have the vessel fully surveyed by a qualified marine surveyor. Details are supplied on the understanding that all negotiations shall be through Ancasta brokerages. This vessel is offered subject to prior sale, price change or withdrawal without notice. Please Note: where the vessel’s status shows as “Preliminary”, details of the vessel have not yet been confirmed by the Vendor.