Interpreting drawing?

[Cornish JackParticipant @cornishjack]

Ahem!! …”simple and universally understood” … I beg to differ!!

Anyway, First angle, smirschst angle, my cunning plan worked!! It was another of those “Good Lord, that was lucky”, moments. Would probably have helped having five or six arms instead of the standard issue but after much deep breathing and finger crossing, the hole was drilled in the correct place and to the correct size. Remarkably, the extra 1.3mm on the plate depth didn’t noticeably affect the exit point at the hot end – drilled from the cold end ‘cos it was less restrictive access. Now boring out the A standard crankshaft bearings on the face plate. The collection of balance weights makes the plate resemble a scrap yard … and it STILL bounces!!

Onwards with a (for the moment) happy smile!

Rgds

Bill

 

[TerrydParticipant @terryd72465]

Posted by Cornish Jack on 06/12/2011 19:52:55:

Ahem!! …”simple and universally understood” … I beg to differ!!

………………………….

Rgds

Bill

 

 

I simply do not understand what is difficult about seeing a simple graphic image, – ‘a picture is worth a thousand words’ or so the saying goes

Regards

T

[Robert DoddsParticipant @robertdodds43397]

Bill,

Glad you had success with the transfer hole.

Drilling at an acute angle can be fraught. You had obviously pressed on but given the chance I would have tried to start off with a flat ended drill to help keep the main drill and its point going as straight as possible through the main hole.

 

Terry,

Didn’t mean to snub the Homeland by quoting France and US, just using them to highlight that they use the two alternate conventions.

Bob D

 

[Cornish JackParticipant @cornishjack]

Terry, the difficulty is my total lack of any engineering background. I suspect that the majority of contributors to this forum have at least a modicum of working engineering experience; indeed a lot are time served. My own experience is entirely aviation oriented (various flight crew roles). While I may have difficulty in reading engineering drawings, I could correctly load a 747-400 FMC for a flight from anywhere to anywhere (and fly it) = it is VERY simple (I think) … how would you manage?

Seems to me that it’s worth bearing in mind that this is a HOBBY forum, not a professional one and it will, therefore, necessarily encompass a wide variety of skills (and lacks thereof)

Rgds

Bill

 

[TerrydParticipant @terryd72465]

Posted by Robert Dodds on 06/12/2011 22:19:13:
…………………………Terry,

Didn’t mean to snub the Homeland by quoting France and US, just using them to highlight that they use the two alternate conventions.

Bob D

 

Hi Bob,

 

I realised that, sorry if I gave the impression otherwise. It’s just that I have been using both conventions for many years. Simple.

 

Posted by Cornish Jack on 07/12/2011 17:23:25:

……………I could correctly load a 747-400 FMC for a flight from anywhere to anywhere (and fly it) = it is VERY simple (I think) … how would you manage?

Seems to me that it’s worth bearing in mind that this is a HOBBY forum, not a professional one and it will, therefore, necessarily encompass a wide variety of skills (and lacks thereof)

Rgds

Bill

 

Hi Bill,

 

I concur that it would take me some training to acquire such a skill as that. Of course specific operations need specific skills and specific training. I thought that understanding graphics was generic rather than specific. However I found reading an engineering or orthogonal drawing quite intuitive from when I was first introduced to them at the age of 11. It probably stems from having a strong sense of spatial acuity.

 

I have been able to understand mechanical systems from an early age. I remember being given bags or boxes of bits and being able to assemble complex mechanisms without knowing what they were intended to be. It was just something I did and I assumed others were the same. I intended no offence , I’m sorry if you saw some.

 

Best regards, and apologies if necessary ,

 

Terry

[TerrydParticipant @terryd72465]

Hi Bill,

 

sorry that I missed part of your text but I thought that I should remark that I am, (or was) for my sins, a qualified pilot.

 

I agree that it may be a HOBBY (caps not really necessary but…………..) forum but we seem to get lots of professional engineers discussing professional procedures quite often

 

Regards

 

Terry

[Cornish JackParticipant @cornishjack]

Terry

There was no offence taken. The point I was trying to make was that, while, probably, the majority of contributors to this forum are highly trained engineers in various disciplines, not everyone is.

I had no manual skills training at school (such things were frowned on!!) and I didn’t get involved in Model Engineering until I was in my 50s and then only intermittently and peripherally. So, lots of interest and enthusiasm but mimimum competence. An ‘upside down’ drawing confuses me – an airfield approach plate anyway up is quite straightforward. … it’s all a matter of skill sets.

In trying to make this subject Hot Air engine I have taken on board the help offered on this forum and (lo and behold) there have been successes. I doubt you can even remember the glow of inner satisfaction when two items machined to dimension ACTUALLY FIT!! (capitals intended). In this build, this has happened often enough to (possibly) dispense with the “Good Lord, that was lucky” tolerance system! At 76 later this month, the time is long past to try to emulate the skill levels of so many of the forum members but I shall plod on learning, improving (I hope) and, most important, enjoying.

Merry Xmas to one and all (or Bah, humbug if you prefer)

Rgds

Bill

[Sub MandrelParticipant @submandrel]

Posted by Terryd on 07/12/2011 21:44:59:

I have been able to understand mechanical systems from an early age. I remember being given bags or boxes of bits and being able to assemble complex mechanisms without knowing what they were intended to be.

 

Terry, we have something in common.

 

Exept I used to be able to disassemble complex mechanisms with great facility.

 

These days I can sometime put them back together…

 

Neil

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