omahoy.org github ↗

Open marine hardwareConcept 02

omatiller.

From the screw
to the software.A tiller pilot, built from scratch for Dash.

Design study 002Pacific Seacraft 25 · Dash
Omatiller concept 02: a pale rounded housing with a graphite service cover and orange controls, a stainless ram ending in a tiller fitting on its pin, a pivot pin and socket underneath, and a keypad and heading display on top.

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Explore the mechanism. Every part starts as dimensioned CAD.Concept geometry · not yet built or tested

Under the cover

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01 / THE HOUSING

Made to come apart.

The housing is 445 mm long, the same as the classic tiller pilots, and a little taller to fit the brushless drive. Four screws lift the service cover off its gasket, and a wiper cleans the ram where it meets the weather.

445 × 100 × 138 mm · service cover · replaceable seals

Our hardware. Our protocol. Your boat.

No NMEA network
required.

Omatiller is being designed around its own heading sensor, controller, and motor drive. Holding a heading won't require an NMEA 2000 backbone, a proprietary chartplotter, or a gateway between them.

Existing instruments can still have a place: omakeel already reads NMEA 0183 GPS and AIS data. NMEA is a compatibility option for the wider suite, not a prerequisite for this pilot.

01Heading sensorIts own box, at least 750 mm from the motor
02Omatiller controllerESP32 in Rust. ODrive S1 over CAN.
03Brushless drive + ramA correction at the tiller

Planned architecture · optional Omahoy app connection

Designed for Dash

A 24.5-foot Pacific Seacraft with a tiller and a lot of sailing ahead. The second study uses the mounting spacing common tiller pilots use: the pin 589 mm from the seat socket and 460 mm from the rudder stock. The 250 mm of travel is still a placeholder until we measure Dash's tiller.

Open all the way down

Python CAD, an original Rust control stack, and a design you can inspect. Part outlines for the motor and controller are placeholders until the parts are in hand. Bench testing and supervised boat trials come before steering.

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