Jump to content


Photo
- - - - -

fuel for hummer/stinger


  • Please log in to reply
26 replies to this topic

#21 zenen1

zenen1

    Playing with fire

  • Full Member
  • PipPip
  • 29 posts

Posted 11 August 2011 - 01:21 PM

When a stinger is constructed the fuse or vent whole is drilled on an angle into the casing. When propellant is burned in the casing the vent whole produces directional thrust and causes the hummer to spin. Due to a generally high powered fuel when it is burned and the gasses escape through the vent whole a noise is produced, and as the hummer spins the vent whole turns away from the audience and back again thus changing the loudness of the sound heard and creating the sound that got these fantastic ground spinners their name, hummer. so technically if my theory is correct a stinger could fly while still producing the "hum" you would get from an ordinary hummer. That is just my two cents, if any part of this post is incorrect, please point out my flaws Posted Image

-zenen

Edited by zenen1, 11 August 2011 - 07:59 PM.


#22 dagabu

dagabu

    Grandmaster

  • Donator
  • PipPipPipPipPipPipPipPipPipPip
  • 8,737 posts
  • Gender:Male
  • Location:Up Nort

Posted 15 August 2011 - 12:58 PM

Hummer, stinger, z-bomb.

Anyone care to flesh out what the core differences are between all three?

-dag
Dave
 
PGI Member http://www.pgi.org
IPA Member http://www.iowapyro.com
 
"The art of fire is indeed the supreme art; for fire is at once the universal slave, the universal master."

#23 Mumbles

Mumbles

    Grandmaster

  • Admin
  • PipPipPipPipPipPipPipPipPipPip
  • 11,439 posts
  • Gender:Male
  • Location:Above You

Posted 15 August 2011 - 02:34 PM

A hummer is a shell insert. It has a single hole tangental to the wall in the center of the tube.

A stinger is a spin-stabilized rocket. The tooling itself is not too different from strobe tooling or the older whistle tooling I've been told. There is a core and a nozzle. There is a hole drilled tangental to the wall just above the nozzle where the rocket is actually lit. It spins up to speed, and when it hits the core it takes off. They can definitely have a hum to them.

A z-bomb is somewhat like a stinger. It's really hard to describe without pictures. Basically there are two angled tangental holes on the bottom which both lift and spin the tube. There is a tutorial on passfire if you're interested.
Just so you guys quit asking, here is the link to the old forum. http://www.xsorbit2....forum/index.cgi

The sky is my canvas, and I have 2,113 pounds of powdered paint in the workshop.

#24 dagabu

dagabu

    Grandmaster

  • Donator
  • PipPipPipPipPipPipPipPipPipPip
  • 8,737 posts
  • Gender:Male
  • Location:Up Nort

Posted 15 August 2011 - 07:27 PM

A hummer is a shell insert. It has a single hole tangental to the wall in the center of the tube.

A stinger is a spin-stabilized rocket. The tooling itself is not too different from strobe tooling or the older whistle tooling I've been told. There is a core and a nozzle. There is a hole drilled tangental to the wall just above the nozzle where the rocket is actually lit. It spins up to speed, and when it hits the core it takes off. They can definitely have a hum to them.

A z-bomb is somewhat like a stinger. It's really hard to describe without pictures. Basically there are two angled tangental holes on the bottom which both lift and spin the tube. There is a tutorial on passfire if you're interested.


OK, that's cool, I have the Z-bomb tooling and I side light them on a long pin.

-dag
Dave
 
PGI Member http://www.pgi.org
IPA Member http://www.iowapyro.com
 
"The art of fire is indeed the supreme art; for fire is at once the universal slave, the universal master."

#25 Yus

Yus

    Pyromaniac

  • Full Member
  • PipPipPip
  • 85 posts
  • Gender:Male
  • Location:EU
  • Interests:Pyro

Posted 09 January 2019 - 03:30 PM

Help with recognizing the book.

 

8a1e89bd6855.jpg



#26 davidh

davidh

    Pyromaniac

  • HE Qualified
  • PipPipPip
  • 67 posts
  • Gender:Male

Posted 09 January 2019 - 04:20 PM

That is probably a PGI publication.



#27 Mumbles

Mumbles

    Grandmaster

  • Admin
  • PipPipPipPipPipPipPipPipPipPip
  • 11,439 posts
  • Gender:Male
  • Location:Above You

Posted 13 January 2019 - 01:01 PM

That is "Notes On Hummers" by Scott Emkovik. That looks to be the original publication in the PGI bulletin. I'm unsure when it was originally publushed, but it's included in the PGI Anthology vol 1 on pages 77-80.
  • Yus likes this
Just so you guys quit asking, here is the link to the old forum. http://www.xsorbit2....forum/index.cgi

The sky is my canvas, and I have 2,113 pounds of powdered paint in the workshop.




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users