Olga 28 and 31

Efficient trailerable outboard cruisers with berths for 4.

Olga 28: outboard powered (mounted in a well or on the transom) or optional inboard diesel 

Olga 31: outboard on a swim step or mounted on the transom. 

Olga 28 with an outboard well

Olga 31 with a swim step

The Olga 28 and 31 are trailerable power cruisers constructed with plywood and epoxy. The design was inspired by the classic power boats of the Pacific Northwest, while the construction takes advantage of modern materials to produce a lightweight, easily maintained boat. 

If you've been looking at trailerable trawlers or small tugs, consider either the Olga 28 or 31. They offer excellent performance and efficiency in a beautiful package. 

Olga 28 Arnhem built by Sytse Douna in North Carolina. She is powered by a 115 HP outboard. 

Olga 28 Luna constructed in Germany by Friedbert and Monika Hennemuth.  They fitted the boat with an inboard diesel and sail drive, and will cruise the canals and lakes in Europe. Click arrow for more images.

Olga 28 Tardis constructed by Paul Kessinger. Powered by a 90 HP outboard, she is cruising the US East Coast from Maine to Florida. Click arrow for more images. 

The Olga 28 and 31 were designed for a couple or a family to cruise the Puget Sound, or up the Inside Passage to Alaska. They are also great boats for cruising in warmer climates, where the spacious pilothouse provides welcome shelter from the sun. Both designs are built with plywood planking over plywood bulkheads, frames and stringers. Builders have the option of using a traditional chine or using epoxy coving and biaxial tape ("liquid joinery" style); bulkheads and interior joinery can also be secured with cleats or epoxy and tape.

There are several options for mounting an outboard. The Olga 28 places the outboard in a well or at the transom, while the Olga 31 has the option of a transom or swim step mount. I recommend 90 or 115 HP for the Olga 28 (for a top speed of about 16-18 knots), and 115 for the Olga 31 (the latest Olga 28 to be launched, Arnhem, made over 22 knots on her maiden voyage with a 115 HP outboard). Drawings are also available for an inboard diesel on the Olga 28, either with a sail drive for lower speeds, or via a v-drive for higher speeds.


Main cabin on Luna

Forward cabin on Tardis. 

Comfort is important in a coastal cruiser. 

The Olga provides berths for 4, 2 in the large forward double, and 2 on the convertible main cabin settee. The settee is raised for a better view while underway, and has generous stowage below. The galley includes sink, stove and refrigerator. The standard layout has a private head and separate wash basin forward, while the Olga31 offers the option of an aft head with standing headroom. With either layout the raised deck and large deckhouse gives the Olga a remarkably spacious interior for her size.     

Olga 28 with outboard well, standard layout 

Olga 31 with aft head and transom-m0unted outboard.

Building the Olga 28

The Plans

The plans for Olga include 12 sheets (24" x 36") and a 60 page construction guide with text and photos. The slideshow gives a preview of the plans.  You can order plans below.

Buying plans 

All plans are sold as PDFs. These are high-resolution files, and the same as I would use to print the drawings if I were to send paper copies. Why PDFs? Because this eliminates the cost and hassle of shipping, and allows you to print extra copies as needed during the build (and you will need to after a few epoxy, 5200, and coffee spills). They can be printed at most good copy shops.       

Payment options 

Study plans - just $10

If you're seriously interested I encourage you to order study plans. These include 6 sheets of drawings (sent as high-resolution PDFs. exactly the  same as the building plans), and an excerpt from the Construction Guide, all for just $10.

These will be emailed to you, usually within 24 hours of your order. 

Choose study plans on the drop down menu, and choose your payment option.     

Building plans - $500 

The plans for the Olga 28 and 31 include 12 sheets (24" x 36") and the full 60 page Construction Guide with text and photos. 

These are high resolution pdf files, and I will email them to you, usually within 24 hours of your order. 

Please review the Terms and Conditions before ordering building plans for either design.

Olga 28 

Select study or building plans from the drop down menu. If ordering building plans make sure to choose the correct power preference (outboard or diesel).  

 Olga 31

Select study or building plans from the drop down menu.  

Terms and Conditions

Conditions of Sale

Plans sold by Mark Smaalders Yacht Designs are subject to the following conditions:

1. Copyright in all plans and associated information remains with Wooden Boat Designs LLC. Purchase of a set of plans gives the buyer the right to use the information on those plans to build one vessel.

2. Plans are sold with the understanding that only one boat will be built from any given plan set. Builders wishing to construct additional vessels should contact Mark Smaalders Yacht Designs prior to commencing construction.

3. Builders are responsible for any changes made from the plans without prior approval from Mark Smaalders Yacht Designs.

4. The liability of Mark Smaalders Yacht Designs and Wooden Boat Designs LLC is limited to the price paid for the plans.

5. The fee charged for stock building plans includes consultation to clarify questions regarding the plans and advice on the construction of the vessel, but does not include personal supervision, or design additions or alterations. 


All study and construction plans are sold as electronic versions only. They are sent to the purchaser via email, generally within 48 hours, upon notification from PayPal of a successful purchase.