The Workshop Progress thread 2018

[Jim NicParticipant @jimnic]

Well done George.

, ,

Jim

[mechman48Participant @mechman48]

Thanks Jim/Jason
Next post will be nearer toward completion after titivating etc.

​George.

[mechman48Participant @mechman48]

I lied about leaving posts 'till later'… ​… gave my engine another trial run after packing cylinder gland; run it up to bed in any tight spots & got it ticking over @ approx 15 psi. Watching it running ( ​ ) gave me the chance to see where else it may be passing air… top & bottom cylinder cover joints only just leaking air & cyl.oil by a show of bubbles, not to worry, will be sorted during the titi-vashun phase. .

George.

[mechman48Participant @mechman48]

Started clean up on the smaller items & gave the flywheel a coating, did use grey etch primer under the aero blue, thought I'd try a different colour scheme as opposed to the usual green & red…

George.

[Wout MoermanParticipant @woutmoerman25063]

Nice colour for that flywheel. I see some rough edges and no center hole. Still have to do some machining on the flywheel?

[Neil WyattModerator @neilwyatt]

Nice one George,

Neil

[SamsarandaParticipant @samsaranda]

I think the centre hole is there just covered with masking tape.

Dave W

[David Standing 1Participant @davidstanding1]

And I guess the 'rough edges' are masking tape too.

[mechman48Participant @mechman48]

… I think the centre hole is there just covered with masking tape.

Dave W

… And I guess the 'rough edges' are masking tape too.

​all correct guys, I always leave tape on overnight / longer whilst drying.

​George.

[Jim NicParticipant @jimnic]

After the passing of much time it seems I have the semblance of a rocking valve engine.

My cosmetic "improvements" from Ray HasBrouk's original design such as visible crankshaft bearings, a different eccentric arrangement and a different connecting rod end ganged up on me.  The cumulative result is that the valve operating rod end is some 5mm outside the valve operating arm.  One solution would have been to bend the rod back into line but I don't normally like to see push rods with bends in them so I made an extended link.  It may stay, it may not.  

What I really need to do is either stick to designer's drawings or properly think through what I'm "improving".  A lesson learned.   

Next steps are to arrange the plumbing and the wooden  base, decide on a colour and paint it.

Jim

 

 

 

Edited By Jim Nic on 22/05/2018 11:53:40

Edited By Jim Nic on 22/05/2018 11:55:47

[mechman48Participant @mechman48]

… to pre-empt the next question… the paint is 'rattle can' from a local 'Hobbycraft' shop… usual disclaimer, I also got a can of cream to complement the blue… ?

Geo.

[JESParticipant @jes]

Chantilly ?

[mechman48Participant @mechman48]

Posted by JES on 22/05/2018 12:05:05:

Chantilly ?

Tasted just like horrible oily paint to me…

George.

[V8EngParticipant @v8eng]

Posted by mechman48 on 23/05/2018 09:36:53:

Posted by JES on 22/05/2018 12:05:05:

Chantilly ?

Tasted just like horrible oily paint to me…

George.

You’ve been eating oily painted Lace?

[MeunierParticipant @meunier]

Posted by V8Eng on 23/05/2018 14:26:05:

Posted by mechman48 on 23/05/2018 09:36:53:

Posted by JES on 22/05/2018 12:05:05:

Chantilly ?

Tasted just like horrible oily paint to me…

George.

You’ve been eating oily painted Lace?

painted Lace ? Oh baby that's what I like.
You are giving your age away, V8Eng, mind you, so am I in replying.
DaveD

[V8EngParticipant @v8eng]

Ha Ha. Yes and if my memory is correct the Big Bopper in very late1950s.

I have certainly reached the stage where a trip to the Medics usually involves being told “it’s age related”.

 

Edited By V8Eng on 23/05/2018 22:16:15

[mechman48Participant @mechman48]

Posted by Meunier on 23/05/2018 20:39:40:

Posted by V8Eng on 23/05/2018 14:26:05:

Posted by mechman48 on 23/05/2018 09:36:53:

Posted by JES on 22/05/2018 12:05:05:

Chantilly ?

Tasted just like horrible oily paint to me…

George.

You’ve been eating oily painted Lace?

painted Lace ? Oh baby that's what I like.
You are giving your age away, V8Eng, mind you, so am I in replying.
DaveD

… & a purty face, a wiggle & a walk, a giggle & a talk that makes the world go round, a black eyed honey that takes my money, plays real loose like a long necked goose, hey baby that's what I like…. J.T Richardson ( Big bopper ), Richie Valance, Buddy Holly, all sadly died in plane crash Feb 14 1959… yes I am of that age…

​George

[HOWARDTParticipant @howardt]

While doing some light finishing off to the edges of my loco frames at the weekend my Dremel drill stopped. On investigation the motor still ran but the chuck spindle didn't. Split the casing and found that the motor and spindle were joined by a bit of splined polythene tube which had disintegrated over the last twenty years, yes the drill plate said 1997, this was my second unit in 40+ years. Looked at the Dremel supplier site in Derby and lo and behold you can get a spare. So duly ordered Monday, arrived in post Tuesday and back up and running.

[JasonBModerator @jasonb]

Started the weekend off on a good note with getting the Robinson X-Type to run for the first time. Still need to play with the hot tube burner as it needs a bit of extra heat at the moment but at least I know everything else is working OK. Bit of a poor video as I only grabbed the phone and that was in my left hand.

[mechman48Participant @mechman48]

Very nice Jason, I like the sound… chuff, chuff

George.

[Mark RandParticipant @markrand96270]

Are you permitted to make a heat retaining cowl around the hot tube? Just a bit of sheet to guide the flame so that all of the tube is heated and less heat is radiated away from the tube?

[JasonBModerator @jasonb]

Mark it does have a shroud but it was making it hard to get the extra flame into the right spot so I took it off, did not get hot enough with it in place. Height of where the heat is applied will advance or retard ignition.

[Mark RandParticipant @markrand96270]

maybe a ring shaped burner?

[JasonBModerator @jasonb]

Yes that is a possibility, the strange thing is a few of us over on MEM have all been building at the same time and use the same burner but mine is the only one not getting hot, Graham has suggested reducing the OD of the tube so will try that first.

[Ian S CParticipant @iansc]

With my hot air motors I use the valve, jet, and bunsen section of Primus gas camp stoves, and fit a ring burner . The burners that I use have three rows of holes, and a 60 mm inside dia on has 15 holes (1.5 mm) per row, this is for a motor with a 35 mm hot cap. A gap of 10 mm to 15 mm around your hot tube, 12 holes per row is probably all you can fit in.. I make my burners by using two concentric bits of tube (drill all the burner holes on the inner tube, then braze end plates on. Early on in my time of building these motor I got some old truck drive shafts, a great source of steel tube, and that's what I use.

Your motor runs great, but I was (as you were)disappointed when it needed assistance from another torch. You will soon get it sorted.

Ian S C

[Author]

Posts