Search found 653 matches

by BigDumbDinosaur
Tue Oct 27, 2015 11:51 pm
Forum: Live Steam
Topic: Loco thermal image
Replies: 17
Views: 2263

Re: Loco thermal image

ccvstmr wrote:...just goes to show how thermally IN-efficient steam locos were (are)...but we still luv 'em! ;-) Carl B.
Efficiency is all relative. American coal is probably a cheaper fuel than Arabian oil.
by BigDumbDinosaur
Tue Oct 27, 2015 11:50 pm
Forum: Live Steam
Topic: Loco thermal image
Replies: 17
Views: 2263

Re: Loco thermal image

A temperature key / color code would be useful. that's an image from a FLIR camera. We've got one at work. Should try that sometime and find out where my insulation leaks are. If you want to see something really discouraging, take a FLIR picture of your home at night in the middle of January. :lol:
by BigDumbDinosaur
Mon Oct 26, 2015 11:28 am
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 102
Views: 34350

Re: EMD F7 in SCALE

Sounds like you've got what is basically a torque converter/fluid clutch in between the motor and the hydraulic pump. It's a hydrodynamic (fluid) coupling, not a clutch or a torque converter. A clutch is a purely mechanical device in which fluid plays no role in power transmission. A torque convert...
by BigDumbDinosaur
Mon Oct 26, 2015 1:32 am
Forum: Lathes
Topic: Inside Acme thread
Replies: 48
Views: 5460

Re: Inside Acme thread

Had you tackled that project with steel, you'd understand much better what you were told. That's not to diminish your accomplishment in any way. It looks good, and you can be justly proud. Just as importantly, he now knows how to cut a proper Acme thread. The learning experience in itself is very v...
by BigDumbDinosaur
Mon Oct 26, 2015 12:45 am
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 102
Views: 34350

Re: EMD F7 in SCALE

Andrew Pugh wrote:Nice piece of work!
Thanks!
Are you by chance a mechanical engineer?
No. :)
by BigDumbDinosaur
Mon Oct 26, 2015 12:41 am
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 102
Views: 34350

EMD F7 in SCALE

EMD F7 in SCALE ———————————————— This posting is a brief digression. I don't plan to post a lot of details about how I made this, or reworked that—TMI tends to turn off readers. However, since Chaski's has a lot of "machinery in general" subject matter, someone might find this interesting. One of t...
by BigDumbDinosaur
Sun Oct 25, 2015 7:50 pm
Forum: Lathes
Topic: Inside Acme thread
Replies: 48
Views: 5460

Re: Inside Acme thread

chrismunn wrote:Don't know how to say this without sounding smug, but single pointing those acme threads was probably the easiest operation of the part! Is she pretty, no.
It does look good.
by BigDumbDinosaur
Sun Oct 25, 2015 7:12 pm
Forum: Live Steam
Topic: Loco thermal image
Replies: 17
Views: 2263

Re: Loco thermal image

Greg_Lewis wrote:I can't find the original source on this but it's in several places on the web. Interesting, eh?
Look at all that energy trying to keep the outdoors warm. :lol:
by BigDumbDinosaur
Sun Oct 25, 2015 7:08 pm
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 102
Views: 34350

EMD F7 in SCALE

EMD F7 in SCALE ———————————————— Continuing from the above post... powerassy10.gif Above is a view of the fireman's side of the power assembly. Visible are two more solenoid valves and the inlet and discharge fittings of the propulsion oil circuit. powerassy11.gif powerassy12.gif Above is are views...
by BigDumbDinosaur
Sun Oct 25, 2015 4:37 pm
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 102
Views: 34350

EMD F7 in SCALE

EMD F7 in SCALE ———————————————— Continuing from the above post... powerassy05.gif powerassy06.gif In the above views, the pump adapter has been mounted. It is spaced from the coupling support plate by four precisely machined sleeves made from C1144 TGP. The 1/2"-13 grade eight capscrews go complet...
by BigDumbDinosaur
Sun Oct 25, 2015 4:06 pm
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 102
Views: 34350

EMD F7 in SCALE

EMD F7 in SCALE ———————————————— The concept of Diesel-electric railroad propulsion dates back about 100 years, and came to maturity in the late 1930s with the introduction of EMD's 5400 horsepower FT demonstrator. Although it was apparent to the early designers that using electricity to transfer p...
by BigDumbDinosaur
Sat Oct 24, 2015 8:51 am
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 102
Views: 34350

Re: EMD F7 in SCALE

ccvstmr wrote:...and then, good old-fashioned, ordinary common sense, kick in to fill the gaps where science and engineering couldn't explain why it didn't work! {sorry Bill, couldn't resist.}
:roll: I thought it was the sales department who was responsible for making the excuses when it doesn't work. :roll: