What Did You Do Today (2017)

[JasonBModerator @jasonb]

needle file may take you a while on a reamer that size, take a decent size square file to it and it will be done in 5 mins rather than tickle it all day

[Michael BriggsParticipant @michaelbriggs82422]

Considering Cutwell recommend the use of a Dine or Bilz chuck for the square collets at £250 / £500 plus vat I will give it a miss.

[Anonymous]

Posted by Roderick Jenkins on 03/08/2017 11:46:31:

Wrong! They were plastic so I had to make some new ones.

Useful to know, thanks. Presumably you re-used the original holders?

Andrew

[MWParticipant @mw27036]

Posted by Michael Briggs on 03/08/2017 20:56:58:

Considering Cutwell recommend the use of a Dine or Bilz chuck for the square collets at £250 / £500 plus vat I will give it a miss.

I don't need their chuck for an ER collet?

[Michael BriggsParticipant @michaelbriggs82422]

Posted by Michael-w on 03/08/2017 22:10:37:

Posted by Michael Briggs on 03/08/2017 20:56:58:

Considering Cutwell recommend the use of a Dine or Bilz chuck for the square collets at £250 / £500 plus vat I will give it a miss.

I don't need their chuck for an ER collet?

Tapping chuck.

[Neil WyattModerator @neilwyatt]

Spilt cyano on my leg.

Breaking up into a major hole in my jeans and minor burn – it gets hot QUICK!

Neil

[Bob RodgersonParticipant @bobrodgerson97362]

Neil,

been there done that got the tee -shirt. I remember sitting in my then, loft model building workshop glueing two wing halves together and trying to get them at the right angle . I kept pouring Cyano onto the joint and heaping Glass balls as a filler to strengthen the joint. It was only when felt the heat very close to the nether regions that I realised that I had a 1/4 scale Flabby monoplane wing joined at the correct dihedral and with a pair of trousers and a human being attached to them.

[MWParticipant @mw27036]

Posted by Bob Rodgerson on 04/08/2017 16:59:09:

. I kept pouring Cyano onto the joint and heaping Glass balls as a filler to strengthen the joint.

That's interesting, I've heard the trick of just using baking soda to mix with cyano and it goes rock hard almost instantly, and you can keep doing it to build up layers.

Michael W

[Tony JeffreeParticipant @tonyjeffree56510]

Posted by Neil Wyatt on 04/08/2017 16:49:33:

Spilt cyano on my leg.

Breaking up into a major hole in my jeans and minor burn – it gets hot QUICK!

Neil

Very nasty. Cyano seems to react badly on contact with some plastics – for example the plastic used in fleeces. Gets very hot & emits toxic smoke.

[MuzzerParticipant @muzzer]

It's very exothermic, like many things as they set (including concrete). Warm, moist, sweaty (salty) clothing is ideal for setting CA off quickly. If you actually manged to get CA to set instantly you might have an even nastier situation on your hands (legs?).

Once managed to get some GRP resin to smoke and burn by adding strong MEKP. Usually it's watered down to between 1 and 3% to control the rate of cure.

Murray

[Neil WyattModerator @neilwyatt]

Cotton is so bad because it holds moisture and has huge surface area, I assume. This was only about 0.5 to 1cc and it did set pretty much instantly. I've heard it can catch fire.

Today, less exciting, made some oversize M10 washers and fitted the angle plate to the shaper, swapped the lever over to the right, lubed it and did a test on some heavy gauge steel tube. Worked nicely, but oh it is slow! Still, it's there now for those tricky 5% of jobs the mill isn't ideal for.

Now, the cleanup continues, I have to make some space in anticipation of an exciting new arrival in a few weeks… let the speculation begin!

Neil

[V8EngParticipant @v8eng]

Posted by Neil Wyatt on 05/08/2017 13:16:48:

Now, the cleanup continues, I have to make some space in anticipation of an exciting new arrival in a few weeks… let the speculation begin!

Neil

Come on Neil, we know that Super Adept on Ebay won't need very much space!

Edited By V8Eng on 05/08/2017 14:21:51

[WindyParticipant @windy30762]

Apart from finishing another propeller I have been seeing if I would be able to hold the model hydro for launching as you have a bungee that would launch me if I slipped.
My left shoulder is weak due to an injury and present health has made it weaker.
Fellow hydro friend had to support that arm as have to lift the rear of the hydro to get proper loading on the engine by height of propeller in the water.
At moment think will have to make a bionic left arm.
If I can finish making a new cylinder head in time might have another go at end of the month otherwise it’s next month for last bash at Kingsbury.
A picture of some of the prop bits and experimental cylinder heads.

 

Edited By Windy on 07/08/2017 00:12:39

[Neil WyattModerator @neilwyatt]

Is it against the rules to have some form of launching cradle?

[SillyOldDufferModerator @sillyoldduffer]

Posted by Neil Wyatt on 05/08/2017 13:16:48:.

… I have to make some space in anticipation of an exciting new arrival in a few weeks… let the speculation begin!

Neil

I've thought hard about this and can't see anything wrong with my logic. Are you heavily pregnant?

Dave

[NigeParticipant @nige81730]

Dave, has she got a sister

[BazyleParticipant @bazyle]

Yesterday club BBQ brilliant sunshine and much fun at the track. Today tipping down. Lucky or what?

Mike Chrisp (ex editor of ME) came along to open our new steaming bays 3 of which have plaques to commemorate past members. He gave a nice speech as he had know each of those honoured personally and mentioned that he had even been at our track about 50 years ago (at a very young age of course)

[Neil WyattModerator @neilwyatt]

I don't know what's got into these labradors, but I've had to invest in a pair of air fresheners and a neutradol to make my office habitable!

[JasonBModerator @jasonb]

Blaming the dogs again

Edited By JasonB on 08/08/2017 13:44:03

[mechman48Participant @mechman48]

Golden retrievers are the same, … it's not as though they are fed on baked beans…. Blazing Saddles comes to mind…

George .

[David Standing 1Participant @davidstanding1]

Posted by mechman48 on 08/08/2017 14:38:44:

Golden retrievers are the same, … it's not as though they are fed on baked beans…. Blazing Saddles comes to mind…

George .

Ah, the famous campfire scene!

[duncan webster 1Participant @duncanwebster1]

Posted by duncan webster on 01/08/2017 15:28:47:

Today I had a major break through!!

I've been building a Topsy organ for quite a long time, but had got to the stage where all the pipes worked but I had to work out how to connect the serial/parallel box of tricks to the computer. I'd re-done my laptop to Linux some time ago, and was floundering. However I then remembered that fellow club member Bill was into Linux, and is a very helpful chap, so he came over and introduced me to the Linux command line so I could play Midi files via aplaymidi. This allowed us to get the organ to make a rhythmic noise, but not a tune. Further investigation found that there are lots of notes missing from Topsy (by design) to make best use of the 29 pipes available, so if you're in the wrong key it sounds really odd. The midi files I had were given to me by a chap in Irlam who used to sell the pallet valves, but he has now retired. I was about to get my hand in my pocket and buy some midi files specially arranged for Topsy when Bill offered to write some code to compare what the midi wanted with what was there, then shift the midi a semi tone, compare again and so on to get the best match. Having found the best match it would then output a new file. This lunchtime we got it all working, so the house has been echoing to Blaze Away, which I always thought was Sousa, but is by Holzman.

As soon as #2 son visits I'll get him to put it on you tube and post a link, suffice to say that I'm one happy bunny

Edited By duncan webster on 01/08/2017 15:30:41

Here's the threatened you tube link **LINK**

Don't feel obliged to watch it to the end!

[modeng2000Participant @modeng2000]

Well done Duncan, you should be proud of yourself. Thanks for posting.

John

[Clive HartlandParticipant @clivehartland94829]

Neil, invest in some charcoal biscuits, it solves all the bad air problems for dogs.

I looked after a little Pug and he could fart for England and I started him on charcoal and in days he was a different dog. When the owners retrieved him they were full of praise as to how I had looked after him and stopped him farting.

Clive

[NigeParticipant @nige81730]

Today I bit the bullet and tackled cutting my first thread. It was to be 1/4 BSF. Another thread relates how I sorted out getting the gearing right with a bit of help from my friends. I don't have any 1/4" stock but I do have some odd bolts of a larger diameter so I set about turning one of them down to .250" I think I have discovered that .258 is too big, I'm not sure what the tolerances are for max OD of a thread but I think .258" is a no go.

In turning the diameter down I also discovered that my turning is producing a smalller diameter closer to the chuck, about .0015" over 2" so need to revisit the headstock alignment at some point, but Hey, I'm cutting metal😊 Having got my stock down to a nominal 1/4" I went looking for a thread cutting tool……What's the angle of a BSF thread mmmm book says 55 degrees and the only thing I have to measure angles is a Starrett combination square with an adjustable angle wotsit. I marked two 27.5 degree lines on the rest on my grinder and odified a tool in a piece of HSS. The faces all sloped slightly down and back from the tip so I reckoned I probably had enough clearances.

I know there is a method for cutting threads by setting up half the angle on the compound slide and feeding on the cut from there but a) my compound slide doesn't have a protractor engraved on it (though I could have used the combination square) and b) I couldn't remember what the technique was. So I stuck with mounting the tool at 90 degrees to the bar and feeding the cut using the cross slide.

Then along came all the fun of working out the best way to use the half nut and the TDI…Oh yes, isn't a tumbler reverse useful 😀 Anyway, I started removing metal and it started looking like a thread but as the cut got deeper the cut started sounding decidedly "graunchy" and despite only winding on a couple of thou at a time the thread started looking worse. I have no idea what sort of steel the donor bolt was and maybe cutting a thread on 1/4" stock 2.5" from the chuck was more flex than there should be but let's just say that looking at it it was only something a mother could love 😳 Of course,, when it came to trying to see if it would fit the only 1/4 BSF nuts I have are holding the head stock down! A 1/4" die struggled to get on which is why I started thinking the oversize diameter might be problem.

Well, all that learning took me about 3.5 hours and I have had great fun, exercised my brain more than I have in a good while, learned a lot about my lathe and about the techniques I need to go back and investigate again but more to the point, I finally got on and cut something, thank you everybody that has helped me get this far 😀👍

Edited By Nige on 10/08/2017 22:08:09

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