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Member postings for Brian Abbott

Here is a list of all the postings Brian Abbott has made in our forums. Click on a thread name to jump to the thread.

Thread: A change of scale.
20/01/2020 22:29:52

Thanks all for taking the time to reply.

Reason I ask, having recently found an article in an old copy of Model Engineer, the chap went on to show that he had added some extra items to his 1” Minnie taken from the drawings for the 1.5” Alchin ( spot on Richard ).

He added a governor, displacement lubricator, cylinder blow down valves and a couple of other items, so thought I might try and do the same.

So, again, thanks all.

PS. the artical was in Volume 155 Number 3763

20/01/2020 15:18:27

If someone a little brighter could confirm for me.

If I have a drawing that is scaled 1.5" to the foot and I want to make it 1" to the foot, do I simply.

Multiply the 1.5" dimension by a value of 8

then divide by 12?

So.. 3/8(0.375) x 8 = 3 then div by 12 = 1/4(0.250)


Thread: Brian's 1" Minnie Traction Engine
18/12/2019 23:08:19

Thanks both.

Small victory tonight, finally sat on its wheels.


Edited By Brian Abbott on 18/12/2019 23:22:41

11/12/2019 22:46:25

Well i've done it now.

Decided to stay true to Mr Masons book and soldered the first one.

Time will tell.


Thread: Steel Boiler Tubes.
11/12/2019 19:36:36

Hello both, thanks for the reply’s

Its the tubes i was thinking not the barrel but thank you.

Talking to a chap yesterday but i cannot remember which he said,

no matter, just interested.

11/12/2019 12:16:51

Hello All.

Am I correct in saying steel boiler tubes are cold drawn seamless tube?



Thread: Brian's 1" Minnie Traction Engine
11/12/2019 12:12:30

I did mine before, as Jason said it's just easier.

minnie (14).jpg

27/11/2019 22:54:34

Hello Derek.

There are inner and outer covers which get soldered onto the hubs, fixes everything together.
When I soldered the rear hubs I used a soft solder paste, worked ok but i had an issue with corrosion from the flux.

It has been suggested that I try an epoxy glue instead of solder but I’m not sure.

Slight change of plan at the moment as I forgot to cut the slots that imitate the tyre tread so that’s next on the list, then solder them up.

26/11/2019 13:06:38

Thank you Derek.

Just waiting for some more 10ba bolts to arrive, i can then bolt everything tight and check for true.

Riveting and soldering then.


21/11/2019 22:34:57

Hello Ray.

Not thought of JB weld, will have a think about that.

How strong does it set ?

Not ready to set the eccentric yet, need to drill the exhaust port into the cyclinder but have held off until i fit the chimney base, am sure when the time comes i will fail.

Front wheels progressing ok, fingers crossed i will have it on its wheel soon.


18/11/2019 23:57:30

Hello all.

More help needed,

When i made the rear wheels i soldered the hub and spokes using cup alloy soft solder paste, after doing this and for some time afterwards i suffered from rust around the joint.

I am about to solder the front hubs, is there a better way of doing this ?

Is soft solder paste the best option, would silver solder ( paste or rod ) need to much heat ?

Could glue with an epoxy but don't really want to do this.

Thanks for any help.

Thread: MINNIE TRACTION - Steam link between Cylinder Block and Boiler
28/10/2019 21:02:28

Hello Malcolm

I just machined a slot to match the pocket in the cylinder, possibly not the best solution to reduce priming but I not going to worry..

minnie (269).jpg

Thread: Brian's 1" Minnie Traction Engine
23/09/2019 16:07:00

Thanks for the replies chaps, does look offset but as there is no dimension i would imagine it’s just how it was drawn, anyway i’m going with equal about just to keep the wheel jig the same for both sides, thanks again

Nigel, see your point regarding having a clearance hole, i am not brave enough to key the eccentric, i have found an article in the model engineer that explains how to set the timing using a DTI so am going to try that method if i live long enough....

22/09/2019 19:14:18

Hello all.

Bit stuck and i need a little help.
Just starting making the parts for the front wheels, looking at the drawing the hub looks to be offset to the center of the wheel but i cannot see a size on the drawing, anyone any idea ?

front wheel.jpg

Thread: Injector help
03/07/2019 23:15:30

Hello Paul.

What size injector is that one ?

02/07/2019 22:49:40

Since found out the following, not sure if its correct but..

Steam inlet and outlet are normally the flat type, water feed can be coned or flat, depends on the injector..

Regards the performance of the injector i don't think it makes any differance.


30/06/2019 23:07:09

Hello all.

Need some help if possible.

Are the union nuts and nipples used for normal fitting the same as you would use to connect an injector?


are both horizontal and vertical injectors the same in terms of performance?



Edited By Brian Abbott on 30/06/2019 23:27:48

Thread: Drawing for a miniature quarter turn valve
24/06/2019 08:18:28

Thanks guys,

Duncan, will drop you my email address.


23/06/2019 21:41:37


I need to make a replacement injector isolation valve, many of the comercial places make them but i need one with a flane mount, what i am after is a design i can adapt.




Edited By Brian Abbott on 23/06/2019 21:42:36

23/06/2019 20:53:12


Does anyone know where i can find a drawings for a miniature quarter turn isolation valve ?


Edited By Brian Abbott on 23/06/2019 20:55:51

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