By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Oct 22nd

Merryweather Steam Fire King self propelled

this is the story of my freelance constructed fire king

All Topics | Latest Posts

Search for:  in Thread Title in  
Werner Schleidt01/03/2019 10:38:54
77 forum posts
125 photos

Hallo Duncan,

I am lazy with drawings normaly I made the most on the fly out of my brain. I send you an article from a german

publication by PM.


Howard Lewis01/03/2019 11:42:52
2341 forum posts
2 photos


A splendid account of the work that you have done, and the problems that you have overcome, to make such a marvellous model.

We enjoy reading your reports and seeing the videos.

I am in awe of you!


Werner Schleidt17/03/2019 17:19:47
77 forum posts
125 photos

Hello all ,

many thanks for your comments.

The last thing I add after the winter season is a new name plate. On an old photo it is visible that the fire king was christening to the name Dreadnought.

So I add this for the new steam season.


The firemen and I are waiting eagerly to come out of the basement to be in the new steam season.


Werner Schleidt05/05/2019 12:33:38
77 forum posts
125 photos

Hello all ,

on a nice easter sunday I made a test ride with my fire king to see how the turbulator work.

Last year in october I saw the performance and made the subjectiv rating that it is a remarkable improvement.

The added turbulator in the center flue tube.


This time I added measurement equipment to see the exhaust temperature, the pulling force and the speed.

I recorded this by my own software via bluetooth with a smartphone.

Test drive.jpg

test equipment 1.jpg

test equipment 2.jpg

total drive.jpg

The colours are green the pulling force max 200 N, red the sppeed max 8 Km/h, violet the exhaust emperaturemax 350 °C, the calculatet distance in grey max 1500 m and blue the calculated power max 100 W

To show the measurement more in detail I devided it in parts. And marked the parts in a road map.


The fllowing diagrams are related to the parts marked in the map.

part 1.jpg

The ride over the pedestrian way into the street there was a peak force of 180 N . In 2 the journey starts.

The violet down peaks are related to the cold steam engine and a high waterlevel.

part 2.jpg

At Position 2 I filled the grate with coal nearly to the fire door. And then I start driving. In 3 I had to look to traffic and slow down a little. And then I was in full motion the boiler had lots of power an nearly constant 330 °C exhaust temperature and I was able to hold the speed legal speed of 6 km/h.

part 3.jpg

The same I made at position 2 I filled the boiler grate with coal and looked to the oil pump.

part 4.jpg

In 3 on my way back home I had to wait and made a traffic related stop. On my way the safety valve blew very often and I tried to pump water to come down with the pressure. I drove the round as fast as possible to see what happens.

smoke box.jpg

With this fast driving there is not much unbourned coal int the smokebox. With a vaccum cleaner it was an easy job to clean.



For me it was a great success to see how the fire king performs now. There were some little drawbacks . I forgot to weight the coal ,it was about 3 Kg and 14 liter water. The powersupply of my measurement equipment was only good for one round. The wiring of the sensors to the recorder have to be improved.

best regards


Werner Schleidt06/10/2019 15:40:43
77 forum posts
125 photos

Hello all,

thanks for more then 10000 views on my disriptions here. I had never thought that there is so much interest.

I had many projects ongoing this year. One Item was the poor behavior of my donkey pump. In connection with the displacement oiler the pump has to less or to much oil. And so was the behaviour of the pump. I decided to build a mechanical pump. It was very tricky to put it in function ,but now after 3 Steps the system work fine.

In September we had our club steam days with insider and the public. It was two days of fun. I made a Video for documentation.

I hope you can enjoy it.

best regards


Jon Lawes06/10/2019 16:20:50
325 forum posts

Thank you Werner, very interesting.

Jon Lawes06/10/2019 16:20:51
325 forum posts

Thank you Werner, very interesting.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
Meridenne Boat 2019
TRANSWAVE Converters
Eccentric July 5 2018
Eccentric Engineering
Allendale Electronics
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest