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Member postings for David Heskin

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

Thread: A prototype Lavet stepper motor
17/06/2022 22:34:51

I'm following the electronic free pendulum clock articles in ME Workshop, but need to secure details of successful motion work before committing to the project.

To be honest and with respect, I'd much prefer a solid state digital LED display. I'm hoping that'd be easier and more reliable. Quiet, too. Can anyone advise how to go about it, please?

Thread: Norman Lawrence's Napier Dagger
30/09/2011 14:08:29
Another link I've found:
 
An arguably better view of the block.
 
 
So, you bolt a big lump of ali onto your milling machine, fit a ball-ended cutter and then...
 
Can anyone continue the sequence, up to the stage shown in the link?
.
.

Edited By David Heskin on 30/09/2011 14:09:44

30/09/2011 09:42:58
http://modelengineeringwebsite.com/Napier_Dagger.html shows photographs of a model to rival the unbelievable work of Barrington Hares, Walshaw 'etc.' (where 'etc.' represents very few others on the same planet as we mere humans).
 
However, a major source of bafflement is how some components, namely what are castings in real life, are made.
 
As a good example, which I think should answer all questions, I'm attempting to contact Norman to ask how he machined and finished the engine block. I can easily understand how cylinders, pistons, cranks etc are created, but how on Earth do you go about machining and finishing (and to a perfect state of polish, no less) the complex shapes of an engine block, starting with a solid bar of ali/ali alloy and conventional machine tools (none of that CNC nonsense, thank you)??
 
Can anyone give an insight, please?
 
 
 
P.S. not sure what happened to the thread title - it should read: 'Norman Lawrence's Napier Dagger'. No idea how one edits such things.

Edited By David Heskin on 30/09/2011 09:44:55

Edited By David Heskin on 30/09/2011 09:45:16

Thread: Harrisons gearing and friction.
29/01/2011 09:50:59
'Sleeping in Oblivion': http://soptera.blogspot.com
 
First published December 2007. Still available in DVD format (all pages print enabled) as the 3rd Edition.
 
Videos of the 2003-2005 'replica' at www.youtube.com : please search for the word glathoppa and, if you have the time, may I point to a reading the comments for each video (left click on the square chevrons button).
 
 
I'm confused as to why Mr Creed is asking his original question: he has a copy of 'Sleeping in Oblivion'.

Edited By David Heskin on 29/01/2011 09:52:50

Thread: Claude Reeve Gravity Regulator
16/09/2010 09:05:41
Many thanks to KWIL and Peter. Those plate edges certainly look better than an end mill could produce. Biggest problem with hand sawing is ensuring an edge perpendicular to the face; corrective filing, not to metion finishing, becomes a chore.
 
It's great to hear of specialists willing to do one-off jobs at a fair price.
 
Hmm, this idea has many possibilities.........
15/09/2010 07:13:40
Peter
 
Water jet cutting of brass plate is a fascinating idea, but a few questions arise, if that's OK, please:
 
(1) - How would one go about finding a reliable and competent local (or even postal) outfit?
 
(2) - Is there a requirement to add a margin to the component profile, to allow for jet size?
 
(3) - Was it expensive?
 
Regards
David
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