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pb engine - 6/4/2008 3:49:54 AM   
peterburford


 

Posts: 194
Joined: 5/14/2004
From: Tallebudgera Valley, AUSTRALIA
Status: offline 		For any interested/budding machinists, I've added several pictures and clips to the manufacture section of my site, peterburford.com.au.
Peter
       Post #: 1

RE: pb engine - 6/4/2008 9:49:27 PM   
GrahamC


 

Posts: 542
Joined: 9/19/2005
From: Ottawa, ON, CANADA
Status: offline 		Peter,

Thanks for sharing. I marvel at everything on your website. Your PB33 is a truly well thought out and manufactured engine. It has been some time since I last had a look see. It is most interesting the details of your manufacture.

I see EN36A type steel often spec'd in the UK publications. Is there a more common North American equivalent? I have asked in passing at my local source but it only got a "Don't know what that is" kind of answer. A quick interenet search returns European and Asian web sites.

I know something like 4140 is not the same (ie chrome moly compared to chrome nickel); would it be similar in qualities to EN36A? (Don't go out of your way to answer if you don't know off hand, I will continue to do some poking around the internet to try and answer for myself)

cheers, Graham in Ottawa Canada

(in reply to peterburford)
       Post #: 2

RE: pb engine - 6/4/2008 11:43:22 PM   
Hobbsy



Posts: 10677
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		PB, you had me worried for a moment with the symbol for lead being pb.

_____________________________

"I have gone faster backwards, upside down and on fire than most people have gone at all" Don Garlits

(in reply to peterburford)
       Post #: 3

RE: pb engine - 6/5/2008 12:38:15 AM   
peterburford


 

Posts: 194
Joined: 5/14/2004
From: Tallebudgera Valley, AUSTRALIA
Status: offline 		Graham,

Equivalent standards of En36A are, AISI/SAE 3312, DIN 14 Ni Cr 14, AS X3312H, JIS SNC815.
You are correct in that En36A is a primarily Nickle/Chrome alloy. It case-hardens extremely well. retaining high core strength and, particularly good for our application, high impact strength. It is generally supplied with a black scale finish but, if you are lucky can be had as a bright reeled bar.
4140 is a high carbon, low alloy general purpose high tensile hardened and tempered steel. Good strength, but more difficult to machine.

I'm pleased that you care to look at the manufacturing sequences. I could go into far more detail, but fear that my amateur writing and photograpy skills come across as being pretentious enough as it is, and I'm sure that most of what I say is common-place for many. I'm happy to answer any question to the best of my knowledge. I and my Father have a long and practical experience of model engine manufacture, that would be a shame to be lost. My methods now are 'cottage industry' but we were far more automated in the Taipan days.

Peter

(in reply to Hobbsy)
       Post #: 4

RE: pb engine - 6/5/2008 12:43:11 AM   
peterburford


 

Posts: 194
Joined: 5/14/2004
From: Tallebudgera Valley, AUSTRALIA
Status: offline 		Yeah, lead weight engines. Probably what you would expect at the bottom of the Globe.
I was self concious of having my initials on my car number plate (When I selected narrow plates to suit my older car.) but was happy when it was pointed out that it stood for 'personal best'.
Peter

(in reply to peterburford)
       Post #: 5

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