Office of Steam Logo_1

« previous next »
Pages: [1]

Author Topic: PM research whistle + S-50!  (Read 1761 times)

  • Full Member
  • ***
  • Posts: 617
  • Location: Plano, Texas
PM research whistle + S-50!
« on: March 20, 2024, 03:57:29 pm »
Just got my PM research whistle with all the fittings needed.  It looks great albeit a bit over scale.    It does whistle but it isn’t loud. The Jensen boiler only puts out approximately 15psi.   Pretty sure it’s designed for 30psi or above.. but it whistles.   Love the brass.   Thinking about shoving some rubber O rings into the whistle to shorten it which may allow Lower pressure to be louder.   

None the less, enjoy the video, and let me
Know your thoughts!



[ Guests cannot view attachments ]

Logged
The steam engine has done much more for science than science has done for the steam engine.”

― Lord Kelvin

  • Global Moderator
  • Engineer
  • *****
  • Posts: 5159
  • Wherever you go ......... there you are!
  • Location: Eastern Sierra
Re: PM research whistle + S-50!
« Reply #1 on: March 20, 2024, 04:10:15 pm »
Pretty nice set-up there Travis!

You've asked for our thoughts, so here are a couple from me.

Shortening up your steam line from the boiler to the engine should help a lot in getting everything to run a bit dryer and not spitting so much condensate.

You can up the boiler pressure on a Jensen rather easily by simply doubling the spring on the safety valve, or stretching the one that is on it, or replacing it with a stiffer spring. Any of these techniques do need to be approached with some reasonable caution, but as long as done in a reasonable manner should provide for increased boiler pressure potential. I generally like my Jensen boilers to operate around 25 - 30 psi, but anything over 20 and I'll likely not mess with it.

Were it me, I'd mount the whistle inside of the elbow on your steam line, that is between the steam valve and the elbow, so that you have one less leverage arm that might turn under pressure of pulling the whistle valve and possibly leak steam.

Looks to me like you are having great fun playing with steam here ....... good on ya!!!
Logged
"Information is not knowledge, Knowledge is not wisdom, Wisdom is not truth, Truth is not beauty, Beauty is not love, Love is not music: Music is THE BEST...   
Wisdom is the domain of the Wis (which is extinct). Beauty is a French phonetic corruption of a short cloth neck ornament currently in resurgence..."
F. Zappa ... by way of Mary, the girl from the bus.

  • Full Member
  • ***
  • Posts: 617
  • Location: Plano, Texas
Re: PM research whistle + S-50!
« Reply #2 on: March 20, 2024, 04:16:31 pm »
Quote from: Stoker on March 20, 2024, 04:10:15 pm
Pretty nice set-up there Travis!

You've asked for our thoughts, so here are a couple from me.

Shortening up your steam line from the boiler to the engine should help a lot in getting everything to run a bit dryer and not spitting so much condensate.

You can up the boiler pressure on a Jensen rather easily by simply doubling the spring on the safety valve, or stretching the one that is on it, or replacing it with a stiffer spring. Any of these techniques do need to be approached with some reasonable caution, but as long as done in a reasonable manner should provide for increased boiler pressure potential. I generally like my Jensen boilers to operate around 25 - 30 psi, but anything over 20 and I'll likely not mess with it.

Were it me, I'd mount the whistle inside of the elbow on your steam line, that is between the steam valve and the elbow, so that you have one less leverage arm that might turn under pressure of pulling the whistle valve and possibly leak steam.

Looks to me like you are having great fun playing with steam here ....... good on ya!!!

Interesting point on making the pressure higher on the boiler.   Can these rubber hoses handle 30psi?   
Logged
The steam engine has done much more for science than science has done for the steam engine.”

― Lord Kelvin

  • Administrator
  • Engineer
  • *****
  • Posts: 9193
  • Location: Minnesota, USA 🇺🇸
Re: PM research whistle + S-50!
« Reply #3 on: March 20, 2024, 04:23:52 pm »
The hose you are using will likely slip off at 30 PSI, even with the cable ties.

This fuel line is far better with steam. at 50-60 PSI it will start ballooning.

https://www.chiefaircraft.com/radio-control/engine-accessories/fuel-tubing/dub-197.html?gad_source=1&gclid=CjwKCAjwkuqvBhAQEiwA65XxQOX_8D8vb5zeriXayhXAYrSBH5YNY6QAznX549UT1obowqMR-TWc1xoC_YMQAvD_BwE
Logged
Nick

  • Sr. Member
  • ****
  • Posts: 1818
  • Location: The Winter Wonderland, Michigan.
Re: PM research whistle + S-50!
« Reply #4 on: March 20, 2024, 04:32:43 pm »
If you were just running air then you should be good upto 20-25 max.
But you're running steam and that's a whole lot different with the heat.
Then IMO, I wouldn't go over 15psi. That might be why you haven't had
any problems yet. Brass tubing is the way to go. ;)
Logged
Tommy

"Steam it, like you mean it."

  • Full Member
  • ***
  • Posts: 617
  • Location: Plano, Texas
Re: PM research whistle + S-50!
« Reply #5 on: March 20, 2024, 04:39:30 pm »
How do you loosen the the metal O ring off the Jensen safety valve? They do not come off no matter what way I turn it.
Logged
The steam engine has done much more for science than science has done for the steam engine.”

― Lord Kelvin

  • Full Member
  • ***
  • Posts: 617
  • Location: Plano, Texas
Re: PM research whistle + S-50!
« Reply #6 on: March 20, 2024, 05:50:07 pm »
Quote from: Stoker on March 20, 2024, 04:10:15 pm
Pretty nice set-up there Travis!

You've asked for our thoughts, so here are a couple from me.

Shortening up your steam line from the boiler to the engine should help a lot in getting everything to run a bit dryer and not spitting so much condensate.

You can up the boiler pressure on a Jensen rather easily by simply doubling the spring on the safety valve, or stretching the one that is on it, or replacing it with a stiffer spring. Any of these techniques do need to be approached with some reasonable caution, but as long as done in a reasonable manner should provide for increased boiler pressure potential. I generally like my Jensen boilers to operate around 25 - 30 psi, but anything over 20 and I'll likely not mess with it.

Were it me, I'd mount the whistle inside of the elbow on your steam line, that is between the steam valve and the elbow, so that you have one less leverage arm that might turn under pressure of pulling the whistle valve and possibly leak steam.

Looks to me like you are having great fun playing with steam here ....... good on ya!!!



Problem solved on the leverage!      Also made some adjustments as stated and it’s much louder now! [ Guests cannot view attachments ]
Logged
The steam engine has done much more for science than science has done for the steam engine.”

― Lord Kelvin

  • Sr. Member
  • ****
  • Posts: 1818
  • Location: The Winter Wonderland, Michigan.
Re: PM research whistle + S-50!
« Reply #7 on: March 20, 2024, 07:42:42 pm »
Are you running that with steam from your Jensen #35? How do keep to engine of the #35 from
going around. There's no shut off valve for it. If you're letting that run too it's using
steam.
Logged
Tommy

"Steam it, like you mean it."

  • Full Member
  • ***
  • Posts: 617
  • Location: Plano, Texas
Re: PM research whistle + S-50!
« Reply #8 on: March 20, 2024, 08:12:23 pm »
Quote from: Woe is me on March 20, 2024, 07:42:42 pm
Are you running that with steam from your Jensen #35? How do keep to engine of the #35 from
going around. There's no shut off valve for it. If you're letting that run too it's using
steam.
[ Guests cannot view attachments ]

A simple zip tie!  And because St Paul Steam re-machined the steam chest, it is perfectly flush with no steam leaks.
Logged
The steam engine has done much more for science than science has done for the steam engine.”

― Lord Kelvin

  • Full Member
  • ***
  • Posts: 617
  • Location: Plano, Texas
Re: PM research whistle + S-50!
« Reply #9 on: March 20, 2024, 08:12:54 pm »
Here it is, a bit louder, from modifications, and an added pull cord.


Logged
The steam engine has done much more for science than science has done for the steam engine.”

― Lord Kelvin

  • Full Member
  • ***
  • Posts: 617
  • Location: Plano, Texas
Re: PM research whistle + S-50!
« Reply #10 on: March 24, 2024, 12:09:02 pm »
Added a chuff pot!


Logged
The steam engine has done much more for science than science has done for the steam engine.”

― Lord Kelvin
Pages: [1]
« previous next »