Zipwake interceptors definitively replace flaps


Give or treat yourself to a subscription to Boats in Motion print + digital and for only 39 euros a year you get the magazine at home plus read it on your PC, smartphone and tablet. With a sea of advantages.

Comfort aboard does not only depend on the space and volumes available, the comfort of the sofas or the layout of the interior and deck. An essential part, often underestimated, concerns navigation. In particular, stability at cruising speed. Today there is a new and in many ways more effective solution on the market: the Zipwake interceptors. Imported in Italy by the BU Marine-SAIM S.p.A., they represent the evolution of the classic flaps.

Zipwake Interceptors

You’re cruising with your friends or family on a planing boat. There is a wave or the weights are not evenly distributed on board. The result? A constant need to intervene to make the trim as acceptable as possible. Flaps have long been a key player in remedying this situation. Today, Zipwakes offer one more option with an affordable price and superior comfort. These trim tabs work on roll and pitch by giving an automatic response depending on the conditions the boat is in. The automatism is given by a software that analyses, according to length, speed and weight of the unit, a curve that tells the behaviour of the boat.

About Zipwake

Zipwakes are resin blades contained in a panel that is installed on the transom. The position of the interceptors depends on many factors, mainly related to the boat, such as weight, length and shape of the hull, especially the transom. These blades come out of the boat automatically, adjusted by software by about 3 centimetres for the S series and 6 centimetres for the E series. They are designed for planing and semi-planing powerboats ranging in size from 20 to 60 feet, i.e. from about 7 metres up to 30 metres. The two series are designed to diversify smaller and larger boats. On the E Series it is also possible to install S Series blades as a supplement.

Zipwake Interceptor
Zipwake Interceptor


How Zipwake interceptors work

Once roll or pitch is detected, through a gyroscope installed in the display, Zipwake interceptors act directly to correct the boat’s trim. Zipwakes are faster than trim tabs because they are controlled automatically. There is no need to manually adjust the trim tabs while navigating.

Zipwake interceptors start to come into action between 8 and 10 knots because before that the boat would not have the necessary lift to get the hull up on the water. They play a role both in planing in and at cruising speed to reduce fuel consumption. When turning, the boat tends to stay level when turning with this system.


Zipwake Interceptor
Zipwake Interceptor

What about when the boat is stationary? Some might rightly ask how these systems work when fouling forms on the hull. The answer is easy. Zipwakes have an automatic cleaning setting that can be activated so that periodically the blades come out of the boat even when the boat is stationary, without the need for activation. The important thing is that the system remains powered at all times.


If you have already purchased your boat, you can still retrofit Zipwakes. The kit comes in a box with all the components, depending on the length, aft space and weight of the model. If you wish, the boat owner can also install the system himself, as the installation kit comes with all the necessary instructions.

Zipwake Interceptor
Zipwake Interceptor

Zipwaker vs flaps

What are the advantages of interceptors over flaps? First of all there is the greater hydrodynamic efficiency of the Zipwake. The submerged part is far less and generates less turbulence in the water passing under the hull. The drawing below clearly shows what we are talking about. Both these two devices (trim tabs on the right and intruder on the left) develop a vertical force in the aft part of the hull (as indicated by the arrows in the drawing) which is called lift. This helps to lower the bow of the boat and speed up the entry to the plane. The difference? That while the interceptor results in minimal resistance, that of the flap is much greater. Also, as we have already seen, the reaction speed and (automatic) precision of the interceptor makes it quite advantageous.


Water flow in the aft area of the boat in a boat with traditional flaps or Zipwake interceptors
Water flow in the aft area of the boat in a boat with traditional flaps or Zipwake interceptors



From an economic point of view, this solution varies in price depending on the size and series chosen. However, the starting point is well proportionate to the overall price of the boat and does not weigh particularly heavily on the overall expenditure.

Zipwake Interceptor - Panel
Zipwake Interceptor – Panel

Click here for more information or a quote?


To keep up to date with all the boating news, selected by our editorial staff, subscribe to the Motor Boats newsletter! Just click on the link below, accept the Privacy Policy and click on the “Subscribe” button. You will then receive on your email, twice a week, the best news about powerboats! It’s free and you can unsubscribe at any time, without obligation! CLICK HERE



Leave a Comment

Your email address will not be published. Required fields are marked *

Are you already a subscriber?

Sign up for our Newsletter

Join the Sailing Newspaper Club

Powerboats, its stories, from small open to motoryachts. Sign up now for our free newsletter and receive the best news selected by the editorial staff each week. Enter your email below, agree to the Privacy Policy and click the “sign me up” button.

Once you click on the button below check your mailbox



You may also be interested in.

Jeanneau DB 37 fuoribordo

Jeanneau DB 37 (12 m): the outboard weekender to watch TEST

French experience, outboard engines and American-style hull, Italian style. A boat with an international scope that propels Jeanneau’s DB walkaround family into the high-end. Let’s talk about the new 37, outboard version. Weekender style with a deck that is extremely

Dracan 42 Sport Top

Dracan 42 Sport Top (12 m), the super-spacious weekend boat

Catamarans, of all sizes and for all uses, are now an increasingly common feature of the power boating market. And on closer inspection. Admittedly, there are notable differences from more traditional solutions, but the gain made in terms of onboard