Allchin 1.5″ Injector Options

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Allchin 1.5″ Injector Options

This topic has 6 replies, 4 voices, and was last updated 30 January 2020 at 10:43 by Howard Atkins 1.

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29 January 2020 at 14:24 #449634
Howard Atkins 1
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@howardatkins1
Hi,

What's the preferred injector for the Allchin 1.5" Royal Chester?

I'm replacing the injector on my fathers Allchin, should I buy a standard size 2 injector or the 'Allchin' injector from Polly Models?

Regards

Howard
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29 January 2020 at 14:24 #2931
Howard Atkins 1
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@howardatkins1
29 January 2020 at 15:01 #449642
Clive Brown 1
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@clivebrown1
As specified in the original Hughes' design, the injector has a side inlet for the water. The Polly injector might have that feature whereas most commecial offerings don't AFAIK. However, I 'm not suggesting that side entry is essential.
29 January 2020 at 17:28 #449669
Nick Clarke 3
Participant
@nickclarke3
In the re-run of the series in the 1970's W J Hughes noted that the original injector was taken from LBSC's 3 1/2" loco Petrolea – if that gives you any idea of the capacity required??
29 January 2020 at 21:28 #449720
julian atkins
Participant
@julianatkins58923
Hi Howard,

Suggest you contact Paviersteam, usual disclaimer, though currently the website omits the previous extensive list of Len Steel injectors to the Gordon Chiverton designs, so I don't quite know what has happened recently.

What is wrong with your father's original injector fitted?

I recall Bill Hughes stating he was going to describe the injector for 'Royal Chester', but I don't think he ever did. I thought I had a complete set of MEs for 'Royal Chester', but I might have missed an issue, as I am not that interested in miniature traction engines generally.

Cheers,

Julian
29 January 2020 at 22:16 #449732
Nick Clarke 3
Participant
@nickclarke3
Posted by julian atkins on 29/01/2020 21:28:08:

I recall Bill Hughes stating he was going to describe the injector for 'Royal Chester', but I don't think he ever did. I thought I had a complete set of MEs for 'Royal Chester', but I might have missed an issue, as I am not that interested in miniature traction engines generally.

Cheers,

Julian

That sound like the mag i was reading by chance the other day – He mentioned the Petrolea reference to his original articles and that he had drawn up his own design in the 1970's but he had not yet traced it and had prints produced and readers were not to write in for them yet. It may never have happened.
30 January 2020 at 10:43 #449785
Howard Atkins 1
Participant
@howardatkins1
Thank you for all your replies, very helpful.

Polly models 'Allchin' injector has a side inlet for the water.

As for the original injector this has been machined incorrectly, it will not function and modification to suit would be rather difficult.

Regards
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