Can't Sink: A Vintage Rowboat Plan With Built-In Buoyancy
A 9 ft 6 in rowboat with air chambers hidden in the seats and a fiberglass skin over wood, sized for three adults.
The name makes a bold promise, and the design backs it up with air chambers tucked inside the seats. Can't Sink is a compact rowboat, 9 ft 6 in (2.9 m) long with a 47 in (1.19 m) beam, that carries three adults. Its hull is fiberglass laid over a wooden framework, a mix that suits builders who want a tough, low-maintenance skin without giving up the comfort of working in wood. Think lake mornings, pond fishing and a tender that shrugs off bumps.
Can't Sink at a glance
| Detail | Can't Sink |
|---|---|
| Type | Rowboat |
| Length | 9 ft 6 in (2.9 m) |
| Beam | 47 in (1.19 m) |
| Capacity | 3 adults |
| Construction | Fiberglass hull over a wooden framework; air chambers in the seats; two mold frames |
| Designer | C. T. Allen |
| First published | Boat Builder's Handbook, p. 123 |
| Craft Print | No. 288 |
| Plan sheets | 8 |
Peace of mind, built in
Buoyancy is the headline here. Sealed air chambers in the seats mean the flotation is part of the structure rather than an afterthought, which is reassuring when children or nervous passengers are aboard. At under ten feet it stays easy to move around on a trailer or a small roof rack, and the 47 in beam gives three adults enough elbow room for a relaxed morning on the water.
The build uses only two mold frames, so the setup is modest. You shape the wooden framework, cover it in fiberglass and end up with a hull that resists scrapes from docks and gravel beaches better than bare plywood would. It also means less sanding and repainting each spring, so more of your season is spent rowing rather than maintaining.
The original plan sheets
These are the 8 original sheets, scanned from the magazine. For building, use the full-size PDF in the download section below.
Who designed it
C. T. Allen drew Can't Sink, and it appeared in the Boat Builder's Handbook on page 123 as Craft Print 288. Allen contributed several small-craft designs to that series, and this one shows a practical interest in safety for everyday family boating.
Before you build
- Test each seat air chamber for leaks before you glass over it, since a pinhole there undoes the whole idea.
- Set the oarlocks so the handles sit just above your lap when seated; for a 47 in beam, short oars of around 6 ft usually feel right.
- Work fiberglass in a warm, dry space and wear a respirator, because resin fumes build up quickly in a closed garage.
Download the plan
All eight original sheets of Can't Sink in one file, at full size and ready to print or keep on a tablet beside the bench.
Download the complete plan (PDF, 8 sheets, 6.9 MB)
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