Help identifying engine model

[classicsteve]

Single cylinder, single acting, horizontal poppet valve engine.

I have seen one of these before, so I suspect it is kit built, but I can't find the make or age, so offer it to you for suggestions. Thought to be 60s or 70s, the maker of this one is no longer with us.

I have tried pasting in an image, but can't get it to come up in preview, if it doesn't appear you should see the engine if you click on the link below.

jteqzq.blu.livefilestore.com/y1pF0Y16WfffK-yMVD47gsAGAHPaahT7rC5aqfHqXmYgeqWLqSqYTv_c7Bt3FUOGxKLcKG33xJtzRgK1CZXrVetHYLu1pv1tZi2/PoppetModel4.jpg

[Tel]

That was the easy bit - can't help with the wot however.

Attachments:

[classicsteve]

Thanks Tel, glad you brought the image up - I thought that clicking on the image icon and pasting the url between the bracketed entries was enough. Clearly they have found a way to make it even more difficult, I even tried reducing the size down to a 64th of the original and that didn't fix it either. But there was no error message.

I posted the same question on Home Model Engine Machinist (no problems with pasting images there) - we shall see what they come up with.

I have used Google, and the search engines on the model sites, and not found any info. Given it is so distinctive, someone must know.

[jasonb]

I've seen them before, think the name begins with a J, give me a while and It will come to me.

Jason

[jasonb]

Its a Jowitt poppet valve engine. Original engien was designed by Samuel G. Jowitt in 1907.

Castings were by Chelston Model Engineering. May have "CME" on the cylinder cover. Cost of castings, materials & fixings at the time in 1987 was £35.00 plus £2.60 P&P

Build series in ME by Stan Bray starting No 3807

Jason

[classicsteve]

The perfect answer, everything I wanted to know.

All that remains is for ME magazine to provide a cost effective way for me to access the back numbers - I suspect that it is already in place but I am not sure how it works. So I am sure someone will enlighten me.

Thanks
Steve

[Deleted]

Steve, I think you'll find the most cost effective answer is to be very nice to our John! (Baggo that is). Having met him I suspect that you could ply him with the odd IPA in exchange for the odd scan?
No offence meant John! I promise I'll get back on to the Brit ASAP....
JB

[classicsteve]

As I have the engine, and it is very tidy, I will just wait for someone to sell those copies on eBay or elsewhere. I have heard some magazine owners are very up-tight about copying of old articles !

However I want to know more about the original 1907 engine. Was it just a patent, or a production engine, and what for ?

Steve

[classicsteve]

I would also like to know about Chelston Model Engineering - as they simply don't exist in any records I can find.
Steve

[baggo]

Hi Steve,

I have got duplicate copies of the 2 ME's covering the engine if you are interested. You're welcome to them for the cost of postage.

John

[jasonb]

When you get the mags from Baggo you will see CME have adverts in both, and it says the engine was "designed & built" by Samuel G. Jowitt in 1907. But who knows in what quantities.

Jason

[classicsteve]

There was a Samuel G Jowitt who features in patents from 1914, in association with JH Sheppee, and later with Sheppee Motor Company named as employer. The patents are more related to a device used to power assist bicycles, but in earlier years the Sheppee Motor Company made steam powered wagons, and was into using liquid fueled flash steam boilers and superheated steam. The was setup in 1902 by Colonel Sheppee, in York (Francis Sheppee was his son).

So it is just possible that the same Samuel G Jowitt, was involved with Francis Sheppee, and the poppet valve engine might have been a response to very high-temperature steam generated by flash steam boilers.

A patent search for Francis Sheppee reveals some interesting ideas for flash steam boilers in vehicles under the uninspiring title "Improvements in or relating to a Fluid Pressure Motor and Generator System." v3.espacenet.com/publicationDetails/originalDocument?CC=GB&NR=190427736A&KC=A&FT=D&date=19051026&DB=EPODOC&locale=en_gb

This talks about the problems of very high temperature that can arise in flash steam boilers - which in this case appear to be oil fired. Poppet valves are well suited to high steam temperatures.

Even more closely related to the Jowitt engine is the UK patent 13384 "Improvement in Motors for Operating Pumps and the Likes"v3.espacenet.com/publicationDetails/originalDocument?CC=GB&NR=190613384A&KC=A&FT=D&date=19070530&DB=EPODOC&locale=en_gb, which states that only lift or tappet valves can be used with highly superheated steam. The patent is about ways of getting variable cutoff with this sort of valve.

Very interesting ....

[jgb7573]

Thanks for that pointer to espacenet.com. I can see myself disappearing in there from time to time!

[k11gmh]

Hello cheshire steve if you are still interested reference the side rod engine and you would like the construction notes let me know send me your details via Brunells contact details and I will post you a set free of charge cheers Graham

[classicsteve]

Thanks Graham, received the construction notes yesterday. I am not at all sure I sign up to Stan Bray's methods of using glue anywhere you can get away with it. I hope this Poppet engine doesn't have a stuck together crankshaft - I know they stick airplane wings together these days, but for a historic model it doesn't seem right to me.