Gentlemen I am new to the group but wish to immediately seek assistance. I am producing 3D models for the quality casting of wheels sets for a BR standard 9F....
Hi Francis, the 2½" does indeed have a set of standards and I've uploaded a copy to the files section. These do appear to differ in certain areas from the...
Hi John I will use the file as reference . Thanks. Christopher Chruickshank sourced the NRM drawings for the wheels and I intend to model them in strict scale...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the halfinchlivesteamforum group. File :...
halfinchlivesteamforu...
Apr 8, 2009 3:52 pm
999
Dear Friends If you take the time to download the 9F wheel set file from the file area, you will see that it is a special 3D drawing format that uses a royalty...
Its just over 8 years and we reach 1000 postings. I like to think this group is a successful friendly place, unlike some groups where there are just a couple...
Well congratulations. I do agree about the friendlyness of this group, though I have only used it a few times to seek info I have always found people willing...
Hi, My brother has used CAD for years since he left college. I ususlly ask him for hints and tips and have sent him my efforts for him to 'correct' which he...
I recall somewhere seeing a 'limits and fit' table for O rings? Assuming a 1/16" O ring, if I wanted an, ID of 0.25" what depth and diameter spotface cutting...
Hi David, have a look at: http://www.barnwell.co.uk/pdf/O%20Rings.pdf That has all the info for sizing grooves etc for O rings. I don't know what you will be...
A rough figure is to 'assume' the o ring is 0.0625 dia which it isn't, a 1/16" o ring is 0.070" section so you get a bit of nip. Basically I adjust to suit...
Also remember the "rubber" or elastic material of an O ring is not compressable like convential packing. So the cut out for the ring must be wide enough to...
Your experience of using o rings is totally opposite to that I experience. I only use red or white silicone rings and they have quite a good stretch and ...
Ok I will come clean, its for a Royal Enfield 250 cc engine. The two crankcase halves have a 3/16 passage for (I think a low pressure return) are just butted...
Hi David, You're only looking at a simple low pressure static seal so as long as the O ring is compressed when the 2 halves are bolted together you shouldn't...
What is it, an oil return? Not sure on material, you can get cheap natural rubber rings, or silicone, or viton. The cheap rubber ones are better with oils than...
hallo David nice bike haven't been on one of those since i was a nipper if your crank-case is good i.e. not warped not really necessary , no science in...
Hi everyone I've just joined, and I'm looking for some advice. I'm currently building a 5" Pansy, but I quite fancy making its little sister Pansyette. Three...
Hi Matt, Welcome to the forum! The Association do list a photocopy of the 'articles' for Pansyette but I think they will just be copies of the ME articles that...
Many thanks John LBSC gives the Pansyette cylinder block a width of 1-15/16", which coupled with a couple of frames at 3/32" provides a reassuring 2-1/8". (If...
... Oooh, careful - assuming you're leaving the back to back wheel dimension the same, then all of the extra width of the frames needs to be accomodated...
R.L. Roebuck
rlr20@...
Jun 21, 2009 10:29 pm
1017
How right you are - there was me forgetting I need two frame plates!...
I'm attempting to build a Dyak Boiler, but have run into problems with the dimensions on the Kennion's drawing. The smoke box is shown as 3 1/4" OD and it...
Hi Graham, The construction notes on the Dyak boiler are pretty vague as LBSC refers back to the boiler for Annie Boddie all the time. The boiler barrel is...
Thanks John. 3-1/4" minus 1/8" for the wrapper gives 3-1/8" for the width of the throatplate. Making a 3-1/16" hole in this would leave the flanges only 1/32"...
Having recently lost my collection of Model Engineers in a plumbing leak (whimper), I'm looking for a copy of the May 1934 ME. Has any one got one, or could...
Simon Thomas
spt001@...
Jul 15, 2009 10:58 pm
1022
Simon, Which part of the series are you looking for? May 10th, May 24th, or both? My copies are bound but I should be able to scan any that you need. John...
Both please, if you can. There is further discussion in an issue from Oct 1941, which refers back to the original article. I've got the 1941 part, but not...
Simon Thomas
spt001@...
Jul 16, 2009 5:39 pm
1024
Hi Simon, It's actually a four part article that deals with portable engines in general. Part 3 deals (very briefly) with the design for the portable engine...
