Injector

This forum is dedicated to the Live Steam Hobbyist Community.

Moderators: Harold_V, cbrew

Greg temp
Posts: 23
Joined: Fri Aug 25, 2017 9:16 am

Injector

Postby Greg temp » Fri Aug 25, 2017 10:26 pm

Hello everyone,
I am currently biulding a 7 1/4 inch guage 4-6-4 Hudson locomotive. I know it's easier to by a injector,but I was wanting to have a go at making one.
Does anyone here have or know where I can aquire a set of working drawings to machine from,any feed back will be muchly appreciated

BClemens
Posts: 214
Joined: Sat Oct 08, 2016 10:04 pm

Re: Injector

Postby BClemens » Fri Aug 25, 2017 11:35 pm

Texts: "Minature Injectors inside and out" by D.A.G. Brown and "Locomotive Injectors" by 'The Inspector'.

The first book explains construction with many diagrams and drawings.

These are both currently available.

BC

Greg temp
Posts: 23
Joined: Fri Aug 25, 2017 9:16 am

Re: Injector

Postby Greg temp » Sat Aug 26, 2017 12:11 am

Great thanks for that will investigate them,
It's better to try and fail than not to try at all,

BClemens
Posts: 214
Joined: Sat Oct 08, 2016 10:04 pm

Re: Injector

Postby BClemens » Sat Aug 26, 2017 6:52 am

Interesting from across the pond...
http://www.modelenginemaker.com/index.php?topic=5054.0

BC

User avatar
Short Line Tom
Posts: 17
Joined: Tue Jan 03, 2017 9:35 pm
Location: Römerberg/Germany

Re: Injector

Postby Short Line Tom » Sat Aug 26, 2017 2:30 pm

Some more good informations on paper.
The Model Injector from Ted Crawford.

Cheers!
Tom
Each new machine was made on a "used" one.

Greg temp
Posts: 23
Joined: Fri Aug 25, 2017 9:16 am

Re: Injector

Postby Greg temp » Sat Aug 26, 2017 6:53 pm

BClemens wrote:Interesting from across the pond...
http://www.modelenginemaker.com/index.php?topic=5054.

I've just had a look at the link you posted,after reading it(twice),it seems to me I could be spending a lot of time in my workshop and still not get it right,,,so the the question now is do I just buy one and know it's going to work,or make one or two or three and still not get it wright.
Thoughts please
It's better to try and fail than not to try at all,

User avatar
FLtenwheeler
Posts: 1206
Joined: Sun Jan 05, 2003 8:47 am
Location: Florida, on the Lake Wales Ridge

Re: Injector

Postby FLtenwheeler » Sat Aug 26, 2017 6:57 pm

Hi Greg

I know one person that made 4 and was able to get one to work.

Then there was the person that spent 3 or 4 years and never got it right.

It depends on why you are in the hobby. To build things or to run locomotives.

Tim
He who dies with the most unfinished projects: Should of put more time into their hobby.

Greg temp
Posts: 23
Joined: Fri Aug 25, 2017 9:16 am

Re: Injector

Postby Greg temp » Sat Aug 26, 2017 7:05 pm

Hi Tim,
I've heard of guys making a few before they got one to work,,to answer your question I'm in the hobby to build things,I've made all my valves so far,nothing on my loco is of the shelf,
So to quote my grand dad (you don't learn anything if you don't try),

I think I'll give it a crack,,got nothing to loose
It's better to try and fail than not to try at all,

User avatar
makinsmoke
Posts: 1662
Joined: Thu Jul 10, 2003 12:56 pm
Location: Texas Hill Country

Re: Injector

Postby makinsmoke » Sat Aug 26, 2017 8:18 pm

1. Buy one, install it and run.

2. Build one, or more if necessary to get one
to work. That way the pressure is off to get one
working for your build, plus you can put your
injector in once it's working, or plumb both sides
for injectors and install the bought one,
and keep the other side for your injector.

Just my two cents....

Greg temp
Posts: 23
Joined: Fri Aug 25, 2017 9:16 am

Re: Injector

Postby Greg temp » Sat Aug 26, 2017 9:09 pm

Thats a great idea,,I think I will do that,
It's better to try and fail than not to try at all,

User avatar
Dick_Morris
Posts: 2050
Joined: Sat Jan 04, 2003 2:09 pm
Location: Anchorage, AK

Re: Injector

Postby Dick_Morris » Sat Aug 26, 2017 11:56 pm

Do a search here. There has been at least one thread with a collection of injector article citations. In at least one article in ME, there was a fixture to test injectors under simulated conditions but not putting more water into the boiler. It sounded like a good idea to me.

BClemens
Posts: 214
Joined: Sat Oct 08, 2016 10:04 pm

Re: Injector

Postby BClemens » Sun Aug 27, 2017 5:27 am

Chapter 8 in "Miniature Injectors Inside and Out" is on testing injectors and has a design for a quite elaborate test device with pressure gauges and etc.

This is another avenue in the construction of the locomotive but part of the whole and it does sort-of detract from the main project. If the boiler for the locomotive is finished and available for testing the injector it is just another step but if a test boiler must be fabricated, that is far from and halts building the locomotive. Every side project will lead to something else to pursue.

This forum has had a number of interesting posts on injectors.... making a 'side step' into injector fabrication all the more enticing. I found and purchased the Australian book too... I had already built (not quite complete) an upright (Merryweather) boiler a few years ago that is large enough to do some testing - the loco construction is going to suffer.

BC


Return to “Live Steam”

Who is online

Users browsing this forum: No registered users and 16 guests