do not scale drawing

[rleete]

"Drawing not to scale, dimensions omitted for clarity." One of my favorite notes.

 

[ariz]

I have never seen a "Diesel" model engine larger than 5cc, however 10cc glow plug are popular.
There must be a reason for it.
A 16cc "Diesel" may be a bear to start by flicking the prop, and if it bites it may take the finger out.
Mauro

thank you Mauro (forse possiamo parlare italiano? Mauro è un nome italiano, tornitore è un sostantivo italiano...)

anyway, your answer make me to think more about it... perhaps 2 x is a bit too much, maybe 1,5 x is a better option?
or I have to be patient and meticulous and afford it following the original specs
but I have to work always with my 'scope' on the head :-\

 

[tornitore45]

Ariz, we coud talk Italian but this forum is read all around the world and english seems to be to common language.
I am Italian, but leaved in the US for the last 38 years.
If you have visual acquity problem you are probably in my age group.

I have mounted a lens on a homede adjustable arm just over the chuck.

Now, precision is more of a technique (which I lack) than good eyesight.
If you can read the micrometer and the machine dials, you can hold a dimension.

I have learned a lot about precision set up on this board and also on the excellent

http://www.chaski.org/homemachinist/

 

[GailInNM]

Ariz,
Bob (Maryak) built a 10cc compression ignition (Diesel) engine a while back. The complete build thread is at
http://www.homemodelenginemachinist.com/index.php?topic=3712.msg37577#msg37577
and the video of it's first run is in post 400 of the thread.
Gail in NM

 

[Lew Hartswick]

Lew---Triangular scales were also available in cheap, white plastic.---Brian

Hummmm. I wonder does that make them Architect/Drafting RULERS ??
...lew...

 

[Brian Rupnow]

Lew---I never heard them caled a ruler.---Brian

 

[ariz]

Thank you Mauro and Gail (and Maryak too)

now I'm more relaxed and can afford it, the thread of Maryak's build will be very helpful too

thanks again