precisision tools in rocketry

[RadManCF]

I have no idea what a webline is, what he is talking about, or the dangers of wrinkly sand paper. Everyone here has their areas of expertise. This is well outside mine.

A web line is a type of production line, used for sheets of material. A good example would be a paper mill, in which the pulp is formed into a sheet, or web, which is then passed over rollers for further processing. They are also used for synthetic materials, and as I've said, sandpaper. For somthing like plastic sheeting, a wrinkle could be disasterous, espescially if the web hasn't fully cooled. 3M has a lot of them. I would imagine that duPont has a lot of them also. I apologise for the unfamiliar jargon, I figured that there's enough engineers in this hobby that someone would know what I was talking about...

[BABAR]

Absolutely no apologies necessary. Just havin' fun with the precision tool people. I am more of the, " measure with a micrometer, mark with chalk, cut with an axe" type of rocket builder. But I have fun and stay safe, so I guess that is okay too!

[RadManCF]

Absolutely no apologies necessary. Just havin' fun with the precision tool people. I am more of the, " measure with a micrometer, mark with chalk, cut with an axe" type of rocket builder. But I have fun and stay safe, so I guess that is okay too!

Yeah, the Millwright trade is a pretty small world, maybe 90,000 in the US. I'd assume that there are more doctors in the US than Millwrights...

[NAR29996]

And a very talented one. I agree Eric. Most of use need fair to good precision. I am sure your set would measure the width of a hair.

Gawd, don't give me a straight line like that! This is supposed to be a family frendly forum.

[Micromeister]

Dial caliper is indispensable, I use an O.D. mic here and there. A dial indicator is useless unless you have a concentric spindle of some sort (or bench centers) to mount your workpiece in. First year apprentice? Slow your roll.

Ditto Chadrog:
Dial Calipers, O.D. mic and percision rules are used almost daily. Dial indicator, percision levels and loads of other precision instruments with Wood, metal lathes and milling machines. Most of us semi-machinest hacks, don't even own such stuff
When you say theodolite to most Rocketeers they will be looking for two point Altitude Tracking instruments. I'd venture to say we wouldn't even think about using theodolites for large format distant machine alignment though it makes perfect sense now that you mention it.

[cwbullet]

Gawd, don't give me a straight line like that! This is supposed to be a family frendly forum.

Funny. I also have a good diameter / circumference tape measure.

[chadrog]

Funny. I also have a good diameter / circumference tape measure.

Known as a "Pi Tape".

[RadManCF]

When you say theodolite to most Rocketeers they will be looking for two point Altitude Tracking instruments. I'd venture to say we wouldn't even think about using theodolites for large format distant machine alignment though it makes perfect sense now that you mention it.

There are actually theodolites made specifically for machine alignment, that look like the older style optical thodolites, but that can't actually measure angles. Instead, they have a cross scope, set at 90° to the main scope, built into the insturment frame. This is used to sight into an optical level set over a monument set into the floor, after using the main scope to position the theodolite between two monuments. Its a rather tedious process.

[cwbullet]

Known as a "Pi Tape".

Thank you. I always wondered the real name.