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6″ Scale Allchin 7NHP Traction Engine SO686

Model Type General Purpose 7NHP Traction Engine
Boiler Construction Welded Steel
Boiler Maker Franklin & Bell
Boiler Year 2000
Build Completion c. 2021
Condition Ready to go
Asking Price £64,995


A superb example of a very rarely seen large-scale miniature – this one is a large half size engine which is particularly impressive!

Bought by the owner and builder as a set of castings and boiler many years ago; this completed traction engine is the result of a meticulous, long-term project. Since completion in around 2021 (the first hydraulic test was 04/08/2021), it has been maintained and perfected by the owner to become a reliable and free-running engine.

Key Features:

  • The welded steel boiler was commercially made by well-known makers Franklin & Bell in 2000. The original material certification and certificate of conformity are present, as are the boiler inspections since the initial boiler inspection in 2021. They have been conducted by a well-known examiner with the 10-yearly hydraulic valid until 2031 and the steam test due to expire in June 2025 – this one is available for a swift handover should the buyer wish to use it straight away!
  • A single-cylinder, four-shaft, 2-speed arrangement with a slide valve actuated by a Stephenson’s linkage.
  • Mechanical water pump and steam injector fitted for filling the boiler when in steam, as standard.
  • Benefits from being constructed with a stainless-steel tender and ashpan. The owner made it with longevity in mind.
  • Steam whistle, mechanical lubricator, and pressure release valves, as expected. Also a dummy set of Pickering-style governors.
  • Well-built to a high standard throughout. It has been maintained well and comes out as a large half size engine. The finish is good, and the builder is clearly accomplished.
  • The paintwork is in good condition. It is hand painted (and visibly so) but it’s smart and it looks the part with full signwriting throughout.
  • The wheels are on original metal strakes, adding to the impression that this a largely prototypical miniature. The wheels are fully riveted adding to the efforts made to make the whole engine feel authentic.
  • Removable double seat – it looks authentic with it removed but is very practical with the seat fitted.
  • Includes a half-day tuition session, if requested by the buyer. 

Overall, an impressive large-scale miniature traction engine. It will comfortably seat two for driving and has enough weight to be fun to drive. Although a large miniature (see dimensions below the photos), it is still very manageable and would fit in a typical garage. It is nicely made and clearly hasn’t seen much heavy work since completion!

Asking Price – £64,995

Warranty and Aftercare – All our ‘ready to go’ miniature steam traction engines include a 3-month warranty and a subsequent 33 months of technical support!

We always encourage prospective buyers to view vehicles and steam engines in person prior to purchase. This engine is advertised for sale by Berrybrook Steam & Classics on behalf of the owner and seller.

For more information, please speak to Matt on 01392 833301 or email [email protected]

As with all our miniature steam traction engines listed for sale, we recommend viewing in person where possible. Appointments are recommended so please try to contact us before travelling for a viewing. 

Please ask about our flexible part-exchange options. Delivery can be arranged to anywhere in the UK, and beyond, at buyer’s expense.

Height 66 1/2 inches
Width 47 inches
Length 105 inches
Weight (approx.) c. 1,500-2,000kg

Please note – dimensions and weights indicated above are approximate for guidance only. They exclude any easily removable components such as trailers, seats, spark arrestors etc and are supplied to give an indication of the storage or van space needed!

For Sale

LOOKING TO SELL?

We specialise in the sale of steam engines and historic vehicles of all shapes and sizes! 

If you are looking to sell your steam engine or historic vehicle, we make both cash offers and sell on commission. We would be more than happy to discuss the possible sale of your vehicle with you.

Find out more

EXPERIENCE DAYS

Do you want to get involved in the world of steam? Are you considering buying a miniature steam engine? Are you stuck for a gift idea or are you simply looking for a good day out?

If so, we offer two different style days, tailored to suit your needs…

We offer a ‘Traction Engine Experience Day’, perfect as a gift and a fun day out learning a bit about what running a steam engine involves. We also offer a ‘Miniature Driving Lesson’ which is a half day course in the practical use of a scale traction engine.

Find out more

THE BERRYBROOK STEAM & CLASSICS SHOP

Visit the official Berrybrook Steam & Classics online shop where we sell a range of steam-related products including gifts, parts and accessories for your miniature steam engine, gift vouchers for steam experience days and branded clothing!

Find out more

The Milbury Model Company

We are delighted to announce the launch of our brand new partner website, the Milbury Model Company!

Our newest department is dedicated to supplying high-quality, brand new model and toy-sized steam engines, spares, accessories, gifts and more…

We are official stockists for Wilesco, Mamod, Jensen, Maxitrak, Oxford Diecast and more! All available from our Devon-based shop and online.

Find out more

The Berrybrook Blog

Looking to find out more about the preservation movement, traction engines, historic vehicles or our heritage?

The Berrybrook Blog visits a range of topics to interest all readers!

See our Blog

We can help you sell…

We specialise in selling steam engines and historic vehicles of all shapes and sizes.

If you are looking to sell your steam engine or historic vehicle, we make both cash offers and sell on commission.

Find out more

Opening Hours

Mon

8:30am
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5:30pm

Tues

8:30am
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5:30pm

Wed

8:30am
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5:30pm

Thurs

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5:30pm

Fri

8:30am
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5:30pm

Sat

Closed*

Sun

Closed

Our showrooms are open to anyone and you are more than welcome to pop in to say hello, regardless of whether a purchase is on your mind or not!

*We are occasionally open on some Saturdays by prior agreement only – please ring 01392 833301 on a normal working day to arrange a visit.

We are typically closed on Bank Holidays.

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