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Member postings for geoff walker 1

Here is a list of all the postings geoff walker 1 has made in our forums. Click on a thread name to jump to the thread.

Thread: Reminiscences
19/09/2020 21:44:43

Dad was an aeromodeller.

Sunday mornings he would put his kit in his backpack, pick up his assembled aeroplane, climb on his bicycle and off he went to see his mates at the flying field.

One morning he slipped as he set off, the wing dipped down in front of the handlebars and plunged into the spokes in the front wheel. Crunch crunch and a broken wing.

Dad was very reserved but on this occasion it was one of the few times I heard him swear.

Geoff

Thread: The Workshop Progress Thread 2020
08/09/2020 15:25:14

Lovely Jim, lots of detail and a good combination of home made and ready made parts.

Well done

Geoff

Thread: Swarf damage
03/09/2020 13:20:03

No Jon,

They're not tee nuts just flat lugs cut from 6mm flat.

Cut to the same length as the width of the tee slot and attached to the tray with two small screws.

They slide into the tee slots. The round head screw is tightened which lifts the lug upwards and clamps it in place.

The tray is set up so it just clears the bed.

20200903_130056.jpg

Geoff

03/09/2020 11:40:24

Hi Jon,

This works well for me

20180627_143814.jpg

A simple alloy tray, keep it low profile so it will pass under your largest chuck.

Two lugs are screwed to the back. These locate in the end tee slots and are secured in place with two brass screws, one through each lug.

The leadscrew guard is cheap and cheerfull but very effective. Other brands are available!!!

hope this helps Geoff

Thread: Addition to wobbler steam engine
05/08/2020 14:17:07

Well I like it David. Looks great, and as I said in an earlier post the boiler is superb.

Well done

Geoff

I'm sure you will get some suggestions for your next engine. Have you made one with a slide valve. A lot of people go from the simple oscillator to a simple slide valve engine

Edited By geoff walker 1 on 05/08/2020 14:20:18

30/07/2020 16:38:56

Very good work David, l like the former as well.

I'll be interested to see how you link it all up with your mini oscillator

Just had a look at your picture file and the boiler snaps.

You've made a really good job of it, looks great

Geoff

Thread: Lamp Post Engine
05/07/2020 16:09:39

I can't stop looking at this engine.

Small details catch the eye.

The twisted con rod, the soft edges on the valve coupling, the fluted column.

Sumptuous. Like many others I eagerly anticipate more details

Geoff

Thread: apprentice vise
04/07/2020 20:32:22

Yeah Celso, freedom come tonight, great music.........and the vice is great as well, very useful

Geoff

..

Thread: Lamp Post Engine
04/07/2020 12:53:57

That is wonderful, I am so impressed. Well done

Geoff

Thread: Stuart 10V Build Log - Complete Beginner...
21/06/2020 07:16:05

Hi Dr G

Trust me and Jason, last post, the method works.

Here is a photo of an inverted engine, same one as Jason's which uses a 10v cylinder. You can see the machined outer surface is concentric with the lower cylinder cap. The tapered section is held horizontal in the vice but still with the bore resting on the s.s. bar

20200620_155223.jpg

Also did the con rod using the same method, 3mm bar through 6.5 hole20200408_093045.jpg

20/06/2020 16:11:38

Dr G

You can mill the rough cast outer rim of the cylinder concentric with the bore

Pass short length of silver steel about 8mm diameter through the bore.

Clamp the cylinder in a machine vice but push the bore down on to the s.s bar which will be resting across he top of the vice jaws

Take a light skim of the rim with the cutter and lock the cutter

Rotate the cylinder a few degrees at a time and take more skims making sure for each skim the bore is resting on the s.s

Keep rotating until the whole rim is skimmed and finish with a flat needle file

Sorry no photo

Geoff

Thread: sievert gas torch
18/06/2020 09:56:03

Jason thanks for reply,

My main concern was safety, I would be quite happy to experiment with the regulator to get a good flame. My concern was that it appeared that people used the regulator to close or isolate the gas supply, which to me seemed unwise.

Reading Simon's post above it would appear that gas cylinders are supplied with an on/off valve fitted which makes sense to me. Presumably they are blanked off at the time of purchase?

Geoff

Thread: Another Engine Build
18/06/2020 09:45:42

........and them o rings are great, good compression.

Tricky to fit but worth the effort

Geoff

18/06/2020 09:43:28

Looks good Ron,

I like the way you have fitted the piston, never seen that before.

Assume you threaded the end of the rod and through the piston and the nut is a lock nut.

I just threaded mine tightened it but it still came loose!!!!!

Your method noted for future engine

Geoff

Thread: sievert gas torch
17/06/2020 11:47:36

When finished, I always turn the gas off using the valve on the top of the cylinder.

Hi Anthony

So you have a valve, like in the photo below screwed into bottle and the regulator screws into the tee.?

Is it correct to say the regulator should NEVER be screwed directly into the bottle. Always via a valve?

s-l400.jpg

Geoff

Thread: Stuart 10V Build Log - Complete Beginner...
16/06/2020 22:23:23

So now Im wondering about the best way to drill the mounting holes for the valve chest and cover. I don’t want to end up with it on the piss, like it is on the cover of my book. I’m thinking of clamping everything together, and drilling through as a stack.

I would drill the holes in the valve chest then clamp the chest to cylinder and spot drill through the holes on to the valve face.

Remove the chest and drill the holes tapping size inthe cylinder

Next clamp the chest to the cover and jig drill through

Should all line up perfect

Geoff

Thread: sievert gas torch
16/06/2020 22:02:56

Joe forgot the picture??????

Here it is

20200616_201259.jpg

16/06/2020 20:54:05

Hi Joe

Is this the regulator you have.

If so I have the same as you including the torch.

Like you I'm unsure about how to set it up so please keep posting I'll be very interested in your observations and any further help you get.

Hi old al

When you said turn it off at the end of play is that done using the regulator or with a separate in line valve which is screwed into the gas bottle?

Geoff

Thread: Stuart 10V Build Log - Complete Beginner...
16/06/2020 11:52:08

Hi Dr. G

I recently bought a 10v slide valve from stuart, didn't ask for a machined one but that's what I got. Stuart may be now supplying them only fully machined.

The one that I got had the cavity machined off centre so it was effectively useless. I rang stuart and they immediately sent me replacement which was machined perfect.

Just looking at your photo the lands on either side of the cavity appear to be uneven which was the problem with mine. Could be just the photo deceiving me but it's worth checking.

Geoff

Thread: Myford ML4 leadscrew dials
12/06/2020 08:38:40

Hi Jon

With reference to your original post, if you fit a leadscrew dial do make it adjustable so it can be zeroed before use.

I put a fixed dial my M many years ago and whilst it has been very useful it is sometimes a pain marking pencil lines on the dial and doing mini calculations to make adjustments.

Geoff

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