Go Down

Topic: Your latest purchase (Read 459031 times) previous topic - next topic

allanhurst


Coding Badly


Caterpillar, Cummins, and many with no name plate.  The search phrase is "engines for gas compression".  They are generally the size of a small truck and require a much larger truck to move them around.

I always thought 1.2L engines in the USA were just used as starter motors.
The large engines in my example actually have fairly normal starter motors.  The engines are "vented" when starting so the starter motor does not have to work very hard.  The first ignition does not happen until the crankshaft is up to speed.

Jet engines (Allison) are also used for gas compression.  Being near a jet engine running at 10,000+ RPM that is moving very large amounts of compressed natural gas at very close to critical pressure / critical temperature is an interesting experience.  Pondering all the possible failures boggles the mind.


AWOL

Quote
I would rather strap a turbine jet engine to my car roof
That little motor and fan is a turbine jet engine!
"Pete, it's a fool (who) looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.
I speak for myself, not Arduino.

allanhurst

Quote
Jet engines (Allison) are also used for gas compression.  Being near a jet engine running at 10,000+ RPM that is moving very large amounts of compressed natural gas at very close to critical pressure / critical temperature is an interesting experience.  Pondering all the possible failures boggles the mind.
Here in the UK natural gas is pumped around the country through 1-metre pipelines at 3000psi. They use RB211 gas turbines, and have been working well for decades.

Allan

wilykat

I seems to remember an unusual engine that was so big it used a jet engine as a starter to crank the big one.

allanhurst

#1670
Oct 14, 2017, 02:08 am Last Edit: Oct 14, 2017, 11:33 am by allanhurst
Any modern airliner uses it's gas turbine APU to start the main engines.

Allan

TomGeorge

Any modern airliner use it's gas turbine APU to start to start the main engines.

Allan
If i remember what my dad said, on 4 engine prop planes, eg Avro Lancaster, engine number 3 and 2 were started first as they had the generators fitted.
Then you started the others.
http://www.airpages.ru/eng/mn/lan_04.shtml
Tom.. :)
Everything runs on smoke, let the smoke out, it stops running....

Boardburner2

There are ground trucks also that  can supply the air , most airliners use an apu though these days.

Qdeathstar

The mini mega is very exciting... sadly most of my projects now go on an esp8266
A creaking creeping shadow
stiff against the freezing fog
glares at a tickless watch.

Time has failed him -- all things shall pass.

Robin2

I just got a cheap 3D printer kit


They are cheap enough now that I have almost had my money's worth of fun just building it.

The next trick is to get a RAMPS board and see if my own simple software works as well as Repetier :)

(The RAMPS board is so I don't screw up the software that came with the printer).


...R
Two or three hours spent thinking and reading documentation solves most programming problems.

Qdeathstar

#1675
Oct 17, 2017, 12:59 am Last Edit: Oct 17, 2017, 01:02 am by Qdeathstar
Your software will probably work better for you since you wrote it, on the other hand repetier has a lot of different fail safes to help make the printer safer...

as far as cheap printers goes, i like the design of that one... no shitty lead screws to wear out or create back lash... wonder how bouncy it is on z-lift for nozzle movements...


Writing your own software to control the printer seems like a lot of work. The printer didn't come with ramps?
A creaking creeping shadow
stiff against the freezing fog
glares at a tickless watch.

Time has failed him -- all things shall pass.

TomGeorge

Hi,
I love the3D printer, does it make objects other then small laundry baskets

Tom.. :)
Everything runs on smoke, let the smoke out, it stops running....

larryd

#1677
Oct 17, 2017, 01:35 am Last Edit: Oct 17, 2017, 01:37 am by larryd
I just received a purchase of a Mini 2560 board, as well as a portable programmer from @CrossRoads. I am very pleased with the quality of the boards! they were packaged very nicely, and arrived very quickly. I very much look forward to using them! :D
I would post pictures, but they are right on Robert's website. though once they are in use, i may take some pictures of my project.

~Travis
I got a few Megawienies from Bob, they are great!
Here is my version how to use it with a breadboard.






My latest purchase, 20 minutes ago. ;)



No technical PMs.
The last thing you did is where you should start looking.

TomGeorge

Everything runs on smoke, let the smoke out, it stops running....

larryd

I just got a cheap 3D printer kit


They are cheap enough now that I have almost had my money's worth of fun just building it.

The next trick is to get a RAMPS board and see if my own simple software works as well as Repetier :)

(The RAMPS board is so I don't screw up the software that came with the printer).


...R
Link ?


No technical PMs.
The last thing you did is where you should start looking.

Go Up