Tertium Quid Drawing Errors

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Tertium Quid Drawing Errors

This topic has 9 replies, 4 voices, and was last updated 16 February 2010 at 21:58 by Sub Mandrel.

Viewing 10 posts - 1 through 10 (of 10 total)

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9 February 2010 at 20:34 #38730
JasonB
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@jasonb
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9 February 2010 at 20:34 #48444
JasonB
Moderator
@jasonb
Just spotted a few errors on these drawings

Base plate (both drawings) the overall size of the cut out is given as 1/4″ (25mm) assume it should be 1″.

Also on the base plate there is no way of locating the cutout vertically. I think it should align with teh 1/8 & 1/4 hole positions abu as drawn the cutout lines do not line up with the centre holes.

Flywheel The side elevation gives a total rim thickness of 1/4″ but the section gives 1/4 + 1/16

Don’t know if the metric dims are a new addition or from the original article but if newly added can they be consistant. 1 1/4″ is shown as both 30mm and 32mm. 7/8″ is given as 24mm and 25mm when its usual to round it to 22mm

I’ll let you know if I see any more
10 February 2010 at 09:03 #48466
David Clark 13
Participant
@davidclark13
Hi There

I just posted the drawing as is.

It was drawn about 20 years ago.

I will update when I get time.

regards David
10 February 2010 at 21:25 #48503
Terryd
Participant
@terryd72465
There also appears to be a mistake on he positioning of the holes for the side brackets of the main body. Th one on the RH side of the cutout is marked as being 15/32 (12) and it appears way out of alignment with a lower hole for the pillar which is marked as 1/2 (12).

I know as an ex engineer not to, scale drawings but this looks wrong especially as the corresponding left hand hole is marked as being 21/32 (16) from centre which makes it only 11/32 in from the edge, which I suspect, is the correct dimension in for the right hand hole and not the 15/32 shown.
10 February 2010 at 21:28 #48504
Terryd
Participant
@terryd72465
By the way, there are two copies of the Terium Quid baseplate drawing in the ‘Best Of Model Engineer Vol 2’. one on page 21 and one on page 23.

Is this significant?
11 February 2010 at 07:25 #48519
JasonB
Moderator
@jasonb
Valve nut is also given as 4/32 (7) should be 9/32

J
14 February 2010 at 22:10 #48663
Sub Mandrel
Participant
@submandrel
I’ve been trying to find the Stan Bray articles on the site and can’t.

Could you point me at Tertium Quid and Lusus Naturae please?

TIA

Neil
15 February 2010 at 07:29 #48671
JasonB
Moderator
@jasonb
They are in the “Best of Model engineering Vol II” don’t think its on the site.

Jason
15 February 2010 at 09:06 #48675
David Clark 13
Participant
@davidclark13
Hi There

Yes, in the best of.

A couple of minor corrections are on the site.

regards david
16 February 2010 at 21:58 #48734
Sub Mandrel
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@submandrel
Have to go shopping then!

Neil
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