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Member postings for Speedy Builder5

Here is a list of all the postings Speedy Builder5 has made in our forums. Click on a thread name to jump to the thread.

Thread: Chuck Backplate Problem
14/05/2010 17:45:19
I suspect you have a 2.25 x 8tpi spindle. ie 2.225 inch would be the diameter over the crest of the thread??
The Logan 11 inch had a 2.25 x 8tpi  try
Also the Southbend 10L (Bit of a rare USA beast)
But be carefull,  the spindle nose boss diameter is important as this locates the backplate.  I you cant find a backplate, try one of the engineering services in the back of Model Engineer magazine.
Thread: Boiler stays
01/05/2010 17:26:54
Thanks for all that info - makes it a bit clearer - Bob
30/04/2010 18:20:28
When rivets are used, are they just silver soldered in or does the small end have to be set before silver soldering. 
Why are threaded stays used instead of rivets, or studding used ?
Thread: Speedy Con Rods (5 inch)
16/04/2010 18:56:20
I appreciate that Speedy is a bit 'old hat' these days, designed in the 50's.,  BUT
Has anybody had problems with the dimensions of the conrods.  The drawings state 7.5 inch centres on the bearings, but if this dimension is used, the crossheads would hit the stuffing glands by more than 0.125 inch. The original drawing dimensions would have the above problem,  and the revised Don Young drawing 2A would be 0.187 inch.  Don did not revise the con rods on the drawings I have.
I base my measurements with the assumption that the stuffing gland would be proud of the cylinder cover by 0.375 inches (Allowing about 0.125 inch of adjustment of the gland to compress the stuffing as it wears).
I would be interested to hear from other Speedy builders / owners
Thread: Handle length for Adept No.2 bench shaper.
10/04/2010 17:18:53
I had a 2A years ago when I was an apprentice - it was jolly hard work,  and my mate drew up the drawings to motorise it in 1968 as an exam project. Sadly, we never motorised it, and I sold it for £30.  As I remember,  the handle was about 24 inches long.
Thread: M E Threaded Hex Bolts
08/04/2010 21:43:58
I am looking for a supplier of 1/8 inch x 40 tpi hex steel bolts (M.E) - Any ideas please.
Thread: making square holes
08/04/2010 21:31:42
Perhaps you all know this,  but I needed to make a square hole in some loco crossheads.  First I drilled the holes to same diameter as the square hole.  Then silver soldered a piece of square HSS (smaller section than the drilled hole)into a piece of round stock.
Mounted this 'new tool' into the mill drill,  and used it as a broach, gently shaving off a little each stroke.
Thread: Speedy 5 inch valve gear revisions.
05/04/2010 15:56:04
Thanks David.  I now have the sheets 1a and 2a which detail D.Young's mods (Un dated).  The complete set of drawings are at revision 3.  So I guess this just about closes this thread - unless somebody knows any more !
01/04/2010 12:41:32
Apparently, looking at the web site above (Chris B's response) Don Young, Don Ashton and KN Harris had a bash at improving Speedy by altering the piston valve dimensions for lap and lead.  I am too much of a beginner in this dept.  but would like to take advantage of any improvement at the early stages of my build. As you say,  wether this was ever documented in ME or LLAS,  I don't know,  but I bet there is someone who does !!  That's the advantage of a FORUM like this.
31/03/2010 20:54:29
Chris/Owen - Thanks for the replies.  The Modeleng ....  What a mine of information.  I think that should keep me out of trouble for a few nights as I digest the reccomendations.
31/03/2010 16:28:02
I can't believe that nobody knows anything about this subject.  Any lead would be helpfull.
Thread: Riveting
21/03/2010 17:12:04
Look up AVDEL rivets on the net.  When I were an apprentice,  we used hundreds of rivet clamps when making aircraft panels.  Every other hole had a rivet clamp in it to hold the panel plates together. The 'peg' of the clamp goes through the hole, and when screwed tight,  it clamps all the plates together whilst you put a rivet in the neighbouring holes.  You need different sized clamps for each diferent diameter.
Thread: Has anyone any experience of HQSS tools notably taps and dies?
17/03/2010 19:06:51
I don't know where you would get them,  but when I was an apprentice,  we had taps and drills 'nitrided' when we worked on stainless steel,  and if a coolant was required,  we used ordinary water.
Thread: acid pickle
17/03/2010 18:59:18
I guess it is a bit late,  but sulphuric and hydrochloric acids are freely avaiable from most DIY shops in France,  also many larger super markets.  Sulphuric is used for swimming pools - keeps the bathers nice and pink when the sun doesn't show,  and hydrochloric is for drain cleaning.  Both are normally found on the shelves that are about eye level for a 4 year old child !!!  Vive le france
Thread: Rail gauge tolerance
17/03/2010 18:44:07
So in engineering terms  5 inch gauge is    5" +0.090, -0.000  for straight and bends, opening to the high limit on bend sections,  however through points it should be 5" +0.063, -0.000.
thanks  Bob
Thread: Speedy 5 inch valve gear revisions.
16/03/2010 18:37:57
I understand there has been a lot of comment in the past about the LBSC layout of valve gear.  I believe Don Young re-designed the gear which increased the power output.  Where would I find this information?
Are there any other modifications I should consider at an early stage of the build ?
Thread: Riveting
16/03/2010 18:21:08
Try those electrical pliers for setting electrical crimps.  They normally have cropping holes for metric screws,  but they would crop a rivet as well,  and leave the end square - just like that.  You could put a washer or two under the rivet head to adjust the finished length.
Thread: Sulphuric acid pickle
16/03/2010 18:01:45
What stength acid should I use.  I have tried 36% by weight,  but it is very slow to clean copper.
Thread: CE mark for boilers
14/03/2010 17:17:51
I am planning to make the boiler for a 5inch Speedy loco. How does not having a CE mark affect the running of such a boiler ? and are there known plans to make non CE marked boilers (or any other part) un insurable etc ?
Thread: Rail gauge tolerance
12/03/2010 19:42:31
Wow,  that is technical,  and not sure I understand it.  It states 5" as the minimum width between rails,  and increasing on bends.  I could not read into that what the maximum could be, for straight or curves.
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