Member postings for Andy Joyce 1

Fizzy, the loco was this one. Unfortunately ISRS could not test the boiler due to the stuck regulator and where unwilling to free it and issue a pressure test certificate (for a fee) due to the current workshop workload.

Still interested to know what certification is required to run on a club track.

Thanks Nigel. Am I correct that all is needed to get a boiler certificate is a pressure test followed by a steam test. Intent would be to join a club and run it on their track.

Considering a 3 1/2 inch loco from Station Road Steam. Unfortunately the engine comes with no paper work or pressure test. Is this a dud engine to buy for a first off project?

Thanks Bill

New to the hobby so wish to buy a 3.5 gauge ready built locomotive but those I have seen on a well known site don't come with any paper work. Is this a fools purchase as it will be impossible to get the necessary certificates without knowing the materials used to construct the boiler.

Well a diamond drill did semi work but found with such a thin wall the drill just deforms the tube. So I find the best approach is to grind a V then clean up the shape with the drill.

First batch of tubes cut so at least some progress is being made.

Thanks Jason

Diamond drill ordered!

Did try end milling last night but that just deformed the tube.

Thanks Jason. Diamond drill now purchased.

Also tried end feed milling this afternoon but the tube just deforms without any support inside.

Jason, Do you think this tool would work?

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Colin

Your diamond core cutter could be an option, but they are not cheap are they. Note they don't say they are suitable for metal. More tempted to try a carbide burr.

Will talk tomorrow to the guys in our workshop at work to see if they have any suggestions particularly with regard to the use of a 4 flute milling machine cutter.

Page three shows a metal construction

This site shows the construction of a 1/3 scale build Link

Tim

Aircraft is a 1/4 scale Zavage Bobber which has an open construction so you see all the fuselage construction from the instrument panel backwards to the tail

Would guess a 100 of so joints have to be made so need a system that forms each joint quite quickly. Will post a link that shows the construction shortly.

Tried another technique this evening which was very simple and quick. Using a standard 6 inch bench grinder, I ground an simple arrow shape on the end of the tube with an tip angle of about 90 deg going back no more than a 1/4 of the diameter, then cleaned up the shape with a round file of similar diameter to the pipe.

Result was not perfect but it was very quick with little burring of the tube.

Trevor

Those tools are no use as they will produce right angle cuts. What is required is a lap joint as pictured.

Need to notch joint multiple lengths of thin wall stainless steel tube prior to silver soldering to form a fuselage.

Have 6.35mm OD tube with a wall thickness of 0.2mm which is to be joined to 7mm tube. So how best can this be done?

wondering if I could use a 7mm 4 flute milling cutter in a pillar drill with the 6.35mm OD tube supported in a larger diameter tube to hold it. Would this work?

Tried making a simple grinder as pictured but this did not work at all. Perhaps a different stone type would be better