# Experimental Flash Steam and others

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If you are into math and engineering physics

Roarks book of engineering formulas would be a good and challenging stuff You can calculate boiler stress and strain with a little creativity to can examine bolted riveted and welded joints mine has gone missing in my latest move

Zeb
And on the topic of the wonders of the universe and calculators, I was able to get a close approximation of the coupled waves in Don's ignition test results #154 using someone else's calculator (I haven't checked on how it works).
I was able to create a sine wave, then couple a second to it until it somewhat matched the test results at a ratio of 2.615:1 The real world wouldn't be perfect and linear, and the test sample is limited, but I found being able to visualize the coupling interesting. This is also done in Blender geometry nodes.

I will eventually have to tie all this into flash steam but haven't gotten there yet.

Hi Zeb, I appears you are cleverer than I, so don't discount your abilities.
1: On Slide rules: They are simple scales for adding and subtracting logarithms with scales in "real" numbers.
They do not add, subtract regular numbers. Because of that you have to manually write-down what you are doing, and split calculations into their sub-components, then utilise the slide rule to multiply, etc. by adding the logs of those numbers, etc. That keeps the Slide Rulers directly in touch with their calculations in a way that no computer really does. It is a great tool to help you quickly do the calculations, without taking the calculation into a black-box and just giving you an answer.
2: When you understand what you are doing, you then can write it onto and Excel spreadsheet, programable calculator, or whatever and repeat the calculation many times, even using finely changing variables to iterate to an optimum design.
This is where slide rules become obsolete, although a much speedier way of helping you when doing the basic calculations a smallish number of times.
3: Then (the really clever bit!) you can turn the program inside-out to write it so it will iterate to the optimum, so you input the answer, and it tells you the parameters to get there!

I am at the "Stage 2 level" above, but have had "Mathematicians and computer boffins" write software for stage 3, in my various jobs of a few decades ago.
That was what we called Computer Aided Design before PCs were invented... (Apple, Commodore and the rest!). The programme was on a dedicated huge magnetic disc cartridge, and ran on a computer that was like 10 metal wardrobes in a large room. (Like a school classroom). It took 20 minutes to set-up, then we were allowed 3 runs of 15 mins max. (in the middle of the night). to do the calculations. But it cut a 4 year design and development into 2 years, so was easily justified.
Now you could use your "phone" and get an answer in seconds, if you had "the app"! But you need not understand how the answer was produced... Is that progress?
K2
It finally arrived...and it is glorious. I told my wife, "Honey, look, I can calculate the frustum of a cone!" as she rolls her eyes.

If you click the image a second time it should show all the text, unless of course sarcasm is intended. Image is a bit big.

The other side has the base multiplication and division. I'm still a little overjhelmed by the vernierity of it all, as I'm used to counting only 11 lines or 10 spaces....wait..

I can see now how with capable hands a person could calculate and approximate much faster.

If you click the image a second time it should show all the text, unless of course sarcasm is intended. Image is a bit big.

The other side has the base multiplication and division. I'm still a little overjhelmed by the vernierity of it all, as I'm used to counting only 11 lines or 10 spaces....wait..

I can see now how with capable hands a person could calculate and approximate much faster.
Very nice indeed. Am not sure if I have one with trig funcs.--like that!

@Richard Hed By request, I have fashioned a traction engine no one will ever want.

@Richard Hed By request, I have fashioned a traction engine no one will ever want.

View attachment 145035
Don't be so sure about that, you know there are people who will buy the Brooklyn Bridge and there are alwayws a few who will volunteer for the firing squad.

Besides, it has a very nice look. might be a bit tight in a turn, tho'

Zeb
Oh, no, this one is for the drag races. 1000psi, one shot per rebuild, and comes with slicks.

Looks fun Zeb, Jack up the rear end and the big wheels (Fly-Wheels?) could spin merrily whilst going nowhere. A challenge to machine and get right.

I took a vacation from my vacation and went to Baguio, the so called summer capital of the sPhilippines. On the way and back I flew in a DeHavilland with two engines. the engsines were 5000+ HP each. I've done a cursory search on those engines and come hup with nothing. Anyone know anything about yhem?

I took a vacation from my vacation and went to Baguio, the so called summer capital of the sPhilippines. On the way and back I flew in a DeHavilland with two engines. the engsines were 5000+ HP each. I've done a cursory search on those engines and come hup with nothing. Anyone know anything about yhem?
Baguio is a beautiful place, or at least it was when I was last there 50 years ago.

Baguio is a beautiful place, or at least it was when I was last there 50 years ago.
Yes, a beautiful place. Unfortunately, it is a tourist TRAP now. Baguio is a large city with about a mill peeps in the city proper, but counting the peeps out of the city, much larger. Baguio is situated in a hole in the mountains with very steep sides--80-85degs in lots of places. The smog stifles the nose and headache, and the people there are just looking fsor a quick buck. I'll never go there again. And I don't recommend it.

A De Havilland with two engines conjures up a list of desirable planes, but being used recently into a mountain location makes it almost certainly a DHC Dash-8. ( now made by and badged as Bombardier

engines are as described below ( from Bonbardier website)

## <<Q400 engine and performance​

The aircraft is powered by two turboprop engines type PW150A supplied by Pratt & Whitney Canada. Each engine develops 5,071hp or 3,800kW. The turboprop engines, mounted in Shorts engine nacelles, have full authority digital engine control (FADEC).

The engines drive six-bladed reversible-pitch composite propellers, type R408, supplied by Dowty. The propeller blades are fitted with an electrical de-icing system.

The total fuel capacity is 6,526l giving a maximum range of 2,519km carrying 74 passengers. The maximum cruise speed is just under 650km/h (403mph).>>

Does anyone know how to get the remainder of this article: Milling attachment with three functions from
MODEL ENGINEER 15 December 1963?

I would like to see if it has better functions than most milling attachments.

Does anyone know how to get the remainder of this article: Milling attachment with three functions from
MODEL ENGINEER 15 December 1963?

I would like to see if it has better functions than most milling attachments.
Is this what you are looking for?

#### Attachments

• Milling Attachment with 3 Functions.pdf
161.3 KB · Views: 9
Is this what you are looking for?
That's the first part which I have. This is why I would like whatever else there is, but cannot find it

I found this version of the article that has more but still ends with to be continued
Steve

#### Attachments

• etw-lathe-milling-attach.pdf
396.4 KB · Views: 15
I found this version of the article that has more but still ends with to be continued
Steve
Thanx Steve,
I don't know how you found it but I find it strange that each month has a different title--no way to connect them by name except the authors name. Strange. But still a missing "conclusion".

Well, I can continue drawings. Thanx again.

Just so's you all know, it's unbearably hot here in the philippines. We have to catch the toads that get into our house when we have the doors open in the morning to catch some of that cool night air. I just took out three. THey have a convention center: they come at night to cool off where water leaks from the outdoor hoses. Also, they like the swimming pool, that is, the dog and cat's watering dish.

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