Search found 601 matches

by BigDumbDinosaur
Mon Jul 16, 2018 8:05 pm
Forum: Welding
Topic: Annoying Movie Welding
Replies: 18
Views: 360

Re: Annoying Movie Welding

To discuss Einstein's dumb ideas fully, one has to violate the board's policy of banning political discussion. I don't know if his recently revealed anti-Chinese writings would fall under "politics," but if not, they come close. Einstein's personal observations about the Chinese reflect a different...
by BigDumbDinosaur
Fri Jul 13, 2018 4:23 pm
Forum: Welding
Topic: Annoying Movie Welding
Replies: 18
Views: 360

Re: Annoying Movie Welding

Am I the only one who gets mad when movie and TV characters weld things in impossible ways? Yesterday I watched an awful Spider-Man movie. The Staten Island Ferry had been split down the middle. Iron Man showed up and welded the two halves together, using his hand-ray things, WITHOUT SHIELDING GAS....
by BigDumbDinosaur
Fri Jul 13, 2018 1:10 am
Forum: Sheet Metal Fabrication
Topic: Bought Diacro brake... did i screw up?
Replies: 5
Views: 151

Re: Bought Diacro brake... did i screw up?

trader_joe wrote:
Thu Jul 12, 2018 6:46 pm
Just bought this diacro brake for $300 plus 180 shipping...
I'd pass on it if I were you. There seem to be a lot of missing parts. Where are the fingers?
by BigDumbDinosaur
Sat Jul 07, 2018 4:38 pm
Forum: Live Steam
Topic: 1" U in 1/4" copper tube
Replies: 22
Views: 915

Re: 1" U in 1/4" copper tube

I needed a U bent from 1/4" copper tube...I tried packing a piece of 1/4" tube with fine sand...I tried filling a piece of 1/4" tube with water...Didn't work - the tube distorted! :cry: The travails you describe are what led me to invest in precision tube benders many years ago, some of which I've ...
by BigDumbDinosaur
Sun Jul 01, 2018 10:54 pm
Forum: The Junk Drawer
Topic: Tesla cars
Replies: 22
Views: 649

Re: Tesla cars

I suspect that car fire statistics show that gas fueled cars burn far more often that battery powered cars. Gasoline-powered cars vastly outnumber electrics of all makes. You'd have to qualify burned-up car statistics by percentage of type to have a meaningful discussion about which is prone to aut...
by BigDumbDinosaur
Wed Jun 27, 2018 2:45 am
Forum: General Discussion
Topic: 1/2 - 12 tap
Replies: 32
Views: 1134

Re: 1/2 - 12 tap

...When the outside diameter and the number of threads per inch are known, the pitch diameter is found in the chart above. Decimals only are given, so that whatever the whole number is that precedes the fraction at the head of the columns, giving the outside diameter, if the same number is placed b...
by BigDumbDinosaur
Sat Jun 23, 2018 4:29 am
Forum: General Discussion
Topic: not how they teach you to do it in school
Replies: 10
Views: 571

Re: not how they teach you to do it in school

Better than a spiral point (gun tap), is a spiral flute tap. Some 55 years of experience makes me disagree. As Harold noted, spiral flute taps are relatively fragile, mostly due to their small cross-section. I'd rather spend a bit of extra time clearing chips from a blind hole that was tapped with ...
by BigDumbDinosaur
Sat Jun 23, 2018 4:22 am
Forum: General Discussion
Topic: not how they teach you to do it in school
Replies: 10
Views: 571

Re: not how they teach you to do it in school

When one attempts to power tap with a hand tap, if the material isn't quite thin, chips accumulate in the flutes to the point where they begin to bind the tap in the hole. Once that happens, you have little chance of finishing the hole before the tap seizes and breaks. In the old days, we called th...
by BigDumbDinosaur
Fri Jun 22, 2018 3:13 pm
Forum: General Discussion
Topic: not how they teach you to do it in school
Replies: 10
Views: 571

Re: not how they teach you to do it in school

I need to tap a whole lot of 12mm holes in my new worktops. I ordered a nice German tap 2 weeks ago but it still hasn't made it to my house with no number on a road with no name... So I'm using a cheapo tap from a set I once got at a flea market. It might break before I'm done. I just added the rev...
by BigDumbDinosaur
Mon Jun 18, 2018 1:57 am
Forum: Riding Scale Railroading
Topic: Speaking of Signalling....
Replies: 9
Views: 682

Re: Speaking of Signalling....

My club uses flat iron for rail and welded-in steel ties so we can't use electrical detection for trains. I tried electrical contacts to detect passing flanges but the contacts didn't stand up to weather and abuse. We have one corner that has a level crossing and right after the crossing is the pas...
by BigDumbDinosaur
Thu Jun 07, 2018 11:51 pm
Forum: Live Steam
Topic: golden age of live steam
Replies: 8
Views: 1180

Re: golden age of live steam

Neat! I got a chuckle out of the one dapper gentleman running his train on the high-line, complete with overcoat and fedora. I guess he wasn't too concerned about what was coming out of his locomotive's stack and where it was ending up. :D One thing I will say about playing with trains is that it ke...
by BigDumbDinosaur
Mon Jun 04, 2018 12:23 am
Forum: Live Steam
Topic: Memorial Day Runs
Replies: 8
Views: 928

Re: Memorial Day Runs

Mike Walsh wrote:
Sun Jun 03, 2018 4:40 pm
FLLS' 50th anniversary is in 2019.... Bring your project and take it all in :-)
FLLS?