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Member postings for Mongo

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

Thread: Thread Depth vs Strength
13/01/2011 02:36:11
There are charts that give the shear diameter for threads. This is used to calculate the required number of threads for engagement. As to just a few threads holding the load, well the bolt and threads will yield until enough threads will pick up the loads w/o further yielding. The issue become exacerbated when assembling a threaded pressure connection since there is some deformation and therefore thread contact/engagement diameter can vary.
Thread: Which issues of MEW are available in digital archive?
09/12/2010 03:39:01
I got a subscription to the digital archive ME but was e-mailed the code for MEW and no one will answer my e-mails to correct this problem.
Thread: Artillery
27/11/2010 04:29:23
I have added some pics of the 3D model I'm generating in my photo album called mini cannon.
19/11/2010 22:04:08
Richard - I uploaded some pictures to my album for you to see. The first group is some Solidworks modeling I'm doing on a sliding breach design. I am currently redesigning the striker system in it to make it much more friendly. The second set is some firing models people have made in the States. The first 2 in the album are interrupted thread breach designs from a Modeltec magazine article in 1945. I was able to get an original copy of the magazine and will be scanning a clean copy soon. I've uploaded the less than stellar copy have right now. I am going to do a little redesign on it and make it a bit more friendly to the user by adding an extractor system, buttress threads for the breach, and other minor changes.
 
The other is a sliding breach design is by a gentleman that passed away in mid project. Apparently he was going to use a clip on electric solenoid to hit the firing pin.
 
Here is a little video of my  SW design.
 
http://www.youtube.com/user/Mongo63a?feature=mhum#p/u/13/N_Qgn52IbfU

 

Edited By Mongo on 19/11/2010 22:06:09

18/11/2010 23:06:20
Mr Swan,
 
Thanks for the reply. I ordered a copy of the book. Is your model able to fire or is like the rail gun? Luckily here in the USA I can generate working versions.
 
What tool are you using to upset the rivet? Are you bucking them or using a squeezer?  BTW thanks for the link to the supplier, for some reason I can not find a supplier in the USA on the net for the 1/16" rivet so I might have to import them from England.
 
Have you ever done a sliding breach style of miniature cannon?
 
 
Thread: Chemical Plant
17/11/2010 05:00:53
Having worked in the Petro-Chemical industry for 20 years now as a Mechanical Engineer, I can verify the use of scalled models use to be used for the design and layout of new Units. The advent of computers and ACAD have eliminated the practice and the majority of the model builders have long ago retired. The models were constructed of plastic and there may still be companies making the parts. Several of the refineries around here use to have the models in their lobbies but have since destroyed them. When I was a young engineer I use to love to look at all the detail and then not the plant to compare it to the model. Now days all the new construction is done with 3D computer models.
Thread: Artillery
17/11/2010 04:51:13
Mr. Swan
 
I joined this sight after seeing your incredible work on you miniature cannons.  Is the coastal defense QF 6" gun based on the J.H.Pollard plans from 1912?
 
I am trying to figure out the handle mounted on the left side of the gun that looks like it is on a shaft that pass to the right side and is connected to a spring. I'm guess this was a manual ejector?
 
BTW Love the rail gun work too.
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