20' Plywood Catboat MADAM TIRZA

1 review

Format: Print
Sale price$95.00


Select the format you want to order... Print or Digital

A small daysailer/cruiser with berths for two.

Designed by Charles Wittholz

LOA - 20'
LWL - 19' 3"
Beam - 9' 6"
Draft (cb up) - 2'
(cb down) - 5' 3"
Displ. - 4,400 lbs.
Sail Area : Gaff cat - 338 sq. ft.
Marconi cat - 315 sq. ft.
Gaff sloop - 406 sq. ft.
Construction: Plywood planking over sawn frames
Lofting is required
Skill level: Intermediate to advanced
Plans include 9 sheets, plus 1 page of additional notes from the designer.


20' Madam Tirza was featured in Boat Design Quarterly #43.


If ordering Digital plan sets: These files are in PDF format. Some designs will have just a single page needed to be printed on large paper... typically if they had full-sized mold patterns. Other pages could be printed on letter or tabloid size paper, if you want to save printing costs. You'll see a measurement on pages that have full-sized drawings, so your local print shop will just need to print to that size. And, this particular design has no full-sized patterns. 


“Your downloads are ready” will be the subject line of an email you’ll receive from us—once we’ve processed your digital order. That email has the link to click, so you can then download the file.

This isn't an "instant" process, so if we're asleep, you may need to wait for regular business hours for us to process the order. Although we are quite timely, we may not be processing on weekends & holidays. 

Customer Reviews

Based on 1 review
Norman Collins
Long time cabinetmaker, 1st time boatbuilder

Looking over the plans, I see I have a few things to learn. But I’m excited !

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