Working miniature engineering

Precision Model Steam Engines

Rocking Whale builds precision working model steam engines for miniature engineering, model boats, display installations and specialist distribution. The range spans compact single- and twin-cylinder designs through to a flagship V4.

The range

Choose by configuration and application.

Compare compact, inline, 90° twin-cylinder and V4 configurations by the mechanical layout you want to show, the space available and—where supplied—the published model-boat size guidance.

Selection guidance

Frequently asked questions.

Are Rocking Whale engines working model steam engines?

The range is designed around visible, working mechanical systems. Each product page gives the relevant configuration and selection information.

Which model steam engine is suitable for a model boat?

Start with the dedicated model boat steam engines page, then compare the published boat-size guidance on V2, L2, V4 and BL1K.

What is the difference between oscillating and slide-valve model steam engines?

Oscillating (wobbler) engines rely on cylinder pivoting to open ports, offering simple single-direction running. Slide-valve engines (such as the RW-V2, L2 and V4) use precision D-slide valves and Stephenson reversing gear for full bidirectional throttle control, higher thermal efficiency and authentic scale operation.

Can miniature steam engines be run on compressed air for bench testing?

Yes. All Rocking Whale miniature steam engines can run on regulated compressed air (0.5–2 bar / 7–30 psi) for workshop testing, timing verification and tabletop demonstration without firing a boiler.

Trade & project enquiries

Discuss the right steam installation.

For distributor evaluation, specialist retail, a volume requirement or a model-boat project, contact Rocking Whale with the models and installation you are considering.

Contact Rocking Whale