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Member postings for Mick B1

Here is a list of all the postings Mick B1 has made in our forums. Click on a thread name to jump to the thread.

Thread: Last Night's Astro Image
19/09/2018 09:10:49
Posted by Michael Gilligan on 19/09/2018 08:58:01:

Beachcombing ?



Edited By Michael Gilligan on 19/09/2018 08:58:35

I once modded a telescope micrometer gadget (made by Watson's around 1907) for a friend who specialised in measuring angular separation in multi-star systems. He told me that he and other astronomers with similar interests often kept spiders to provide fine threads for the crosshairs in such devices. (I'd managed to drill a hole for light passage in the internal framework without disturbing the existing crosshair).

But it must've been a helluva well-trained spider wove the web in that link.


Edited By Mick B1 on 19/09/2018 09:11:43

Thread: Clarke metalworkers 6speed
17/09/2018 19:27:40

It may be things have changed.

Back in 2000 I looked at one of these in a Machine Mart branch.

I couldn't tell whether the parts it was made from were good or not, because it had been so casually assembled that I wondered if the branch Saturday sales assistants had put it together during a quiet afternoon. There was slop and backlash in every slide and leadscrew. Maybe I could've sorted it by adjustment, maybe not. That time I bought a well-used but decent Myford instead.

Since then some Far Eastern budget products have improved vastly, and I'm very pleased with the Chinese lathes I now have - so don't assume I'm slagging them off. Just ask what sort of work's been done on it, and take a gander at some of it if you can.

Edited By Mick B1 on 17/09/2018 19:28:52

Thread: Small Carronade model - 68 pdr.
17/09/2018 14:48:49
Posted by Robin on 16/09/2018 16:46:37:

The capsquare pivot is the top of a long bolt that goes all the way down, through the axle bar and nuts on from below. It has to be over the axle smiley

I can see that's the case for the gunnade carriages in the picture, but for long guns it seems to be the capsquare keeper-wedge eyes that are bolted through the axletree. In both cases it's at the front end of the capsquare.

I just wondered if there's any engineering logic in that, or preference by the maker, or just random variation.

Edited By Mick B1 on 17/09/2018 14:49:27

Thread: What has happened to fly spray?
17/09/2018 10:04:22
Posted by Neil Wyatt on 17/09/2018 09:34:10:
...noticed that your windscreen doesn't get coated in dead flies any more I'm surprised we get any of these pests at all...


I thought that happened quite suddenly in the late '80s, and put it down to improved aerodynamic design in windscreens.


Thread: Small Carronade model - 68 pdr.
17/09/2018 09:23:43
That's true and the abbreviation is therefore imperfect in up-to-date English, but I don't think it was always so and it probably became established when it wasn't. It's certainly been in common use for many decades.
Thread: What has happened to fly spray?
16/09/2018 20:46:50

This one is a favourite on several forums, and the Safety Elves usually get the blame.

But I was spraying fies from a nearly-empty can of Raid back in the heatwave and they were dying in seconds, as quickly as Cooper's used to kill them in the 60s.

The theory I've come to is that the carrier fluid (quite possibly water) evaporates inside the can more easily than the active poison - pyrethroid or whatever it is - so that as a can ages and empties, the concentration of the insecticide increases.

Thread: Small Carronade model - 68 pdr.
16/09/2018 18:11:33
OverAll Length.
Thread: Using wood on a metal lathe
16/09/2018 11:45:28
Posted by Benjamin Day on 15/09/2018 20:27:02:
I am sorry to the o.p but i do have to say Derek! I love the model trucks. fantastic model work!

Indeed. Most of the wide variety of work shown is of such a standard that I don't really feel qualified even to comment on it. blush

Thread: Small Carronade model - 68 pdr.
16/09/2018 11:36:50

Well, I shall just have to wait 202 more years to see whether the steel trunnions on my 24-pounder stay the distance... laugh

Robin, I had to look up 'Gunnade' - but it turned out to mean what I thought it might from your photo. It looks as if the capsquares are pivoted from the forrard end, opposite to a long gun. I wonder what governed that?

Thread: new boy
16/09/2018 08:53:37

The Chester's capabilities look good value for money. Consider Warco as well - I'm very happy with mine and I'm a former Myford user. Boxford are also well-regarded machines - when I was working as a turner 40 years ago I thought better of them than Myfords.

Thread: Small Carronade model - 68 pdr.
16/09/2018 07:08:27

I think buying saltpetre to go with a model blackpowder cannon might generate questions? surprise

I'd imagine if it were set up to fire, it would perform much like one of those small flintlock or percussion pocket pistols, say like an original Deringer.

Any road up, family are saying they like it as it is, as have some on here - so for the time being I'll not be following up on bluing/blacking.

Thread: Using wood on a metal lathe
15/09/2018 20:36:06
Yes. For a freehand shape I'd still use a woodturner's gouge rested on a length of bar clamped in the toolpost.
Metal lathe chucks have a larger range of diameter they can grip, but they don't have as good a circumferential hold as wood lathe chucks, so that limits the manual force you can use in some conditions.
Wood swarf can be useful to help lift oily dirt from your machine.
Thread: Small Carronade model - 68 pdr.
15/09/2018 16:49:42

Ian and Roy,

Ain't no rust to speak of on me 24-pounder trunnions after 16 years in contact with oak:-


I think the trunnion caps are 9/16" silver steel, and I may have varnished the oak before laying in the barrel - but I think that's unlikely as I was looking for a close running fit and reckon I cut the mount with a 9/16" slot drill, but it's all a bit vague now... blush

Oh yes, and I think I've got the grain in the oak running the wrong way - should be horizontal.

And thanks for kind words.

Edited By Mick B1 on 15/09/2018 16:52:30

15/09/2018 12:06:43
Posted by Eric Cox on 15/09/2018 10:14:37:

How did you fit the pivot block on the under side of the barrel.

Threaded it 5/16" x 32 x approx. 6mm deep, then did part-turns of the die on the spigot till the block lined up.

15/09/2018 09:16:19
Posted by Clive B on 15/09/2018 02:57:19:

Nice model Mick. A carronade is on my list of things I'd like to make. Where are you getting the rope eyes from?


Let's see if they're any b100dy good first... teeth 2

14/09/2018 20:45:21
Posted by duncan webster on 14/09/2018 20:14:01:

I have a recipe given to me 40 years ago for a witch's brew containing sodium nitrite and caustic soda (from memory).


I'm assuming it is steel, if cast iron all bets are off.

By 'eck - it's a non-shooter, but at first I wondered if you were suggesting some sort of fiendish propellant... surprise

Yes, it's plain BDMS, allegedly EN1a, though it's not quite as free- and clean-machining as some I've had.

As for Vic's sandblasting - isn't that likely to give a matt finish?

The other cannon in my album was also turned from BDMS, washed in near-boiling detergent water immediately prior to applying G96 paste, then washed again, oiled and polished. That produced a glossy finish that's lasted 16 years with little maintenance.

14/09/2018 19:04:26

I made this from Richard Stewart and Donald Heyes book 'Scale Model Cannon' as one of the most realistic of the selection in the book.


It's still awaiting a number of rope-eyes and I'm debating whether to try building a section of dummy hull with rope tackle etc. I used oak stripwood from B&Q instead of the BDMS flats the authors recommended.

It's rather small - about 5" OAL, and another thing I'm thinking of is building it again at double scale.

I tried bluing it with a paste similar to the G96 product available in gunshops. Whether the stuff was too old (it had dried hard and I added distilled water to try and revive it) or the mild steel was unsuitable, it didn't take well. I went black quick enough, but adhesion was poor to nonexistent, so I scotchbrited and WD40'd it all off again. Might try again when I can persuade myself to buy some proper G96... laugh


Edited By Mick B1 on 14/09/2018 19:06:46

Thread: What do you call this type of chuck?
14/09/2018 15:40:52

If you have a set of soft jaws for your 3-jaw, and you do regular work around 3 or 4 approximate diameters, they tend to end up looking like that... laugh

Thread: Bengs models 'Sophie'
14/09/2018 08:51:05
Posted by Paul Lousick on 14/09/2018 03:22:00:

"How likely is a commercial company to make that sort of error? "

Answer: Very often with drawings for model engines because they are drawn by apprentices or draftmen with little experience to cut down on cost. Construction details are also simplified to make it easier to build. A set of drawings for a model engines are inexpensive, a couple of hundred dollars/pounds at most. If they were commercially drawn professional drawings they would cost thousands. You get what you pay for and all model drawings should be checked prior to manufacture. Most contain mistakes.


Yes. Every engineering drawing office I worked in and around had a full-time specialist checker whose job was to trap rookie errors of the sort Jack's found.

Nevertheless stuff gets through - I can remember a cross hole (drawn as blind and needing to be so) dimensioned as being counterbored and tapped 1 1/2" deep in a barstock component of 1 1/2" diameter.

I can also remember drawing up a milling fixture myself which got past the checker, but which the toolmaker came in to the DO to point out was impossible to assemble! Fortunately he was a decent bloke and pretty capable - he already had a proposed solution. blush

Thread: South Cheshire ME Society 50th Anniversary Gala Pictures
13/09/2018 19:57:20

I think I see a Murray's Hypocycloidal at the far end on the lowest shelf in pic 2... smile

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