Forum

Blog

Blog Post

Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1
  • 2

TOPIC: ROCI / WSR Contests for 2019 - 2020?????

ROCI / WSR Contests for 2019 - 2020????? 3 months 1 week ago #2821

  • Jim Stum
  • Jim Stum's Avatar
  • Offline
  • Junior Boarder
  • 765-744-0268
  • Posts: 37
  • Thank you received: 4
  • Karma: 0
Some more thoughts and suggestions for new (inexperienced) piston flyers.
First the "hardest" thing to master is the fit of the motor to the piston tube. To loose the rocket leaves the piston before full stroke, to tight the piston tube blows out!(not really) The quickest way to learn that is to make a dozen or more flights at a time with a cheap 3FNC rocket 18mm w/streamer & A8-5 motors friction fit. No engine hook. Fins not hanging below end of rocket. Use cheap Estes igniters with wire leads wrapped around motor. All of this will allow for quick prep & launch. You really won't need an altimeter for the first dozen flights. If the motor ejects long after apogee, piston is not working. Go again....
You will know when it works by the pop sound and the speed of take off!
After several visually consistent flights, put in the altimeter and see how consistent you are.
Learning this with 18mm rocket you can use the less expensive "FireFly" altimeter 24.95 if ordered from PerfectFliteDirect.

More variables to worry about later, launch mass, piston tube length, placement of launch leads and construction...
The administrator has disabled public write access.

ROCI / WSR Contests for 2019 - 2020????? 3 months 1 week ago #2822

  • Robert Bantly
  • Robert Bantly's Avatar
  • Offline
  • Senior Boarder
  • Posts: 70
  • Thank you received: 5
  • Karma: 2
Thank you, Jim. Will have a couple 18mm TFNC 'kits' from an old designers special ready to go for March flight date. 13mm single also. Non-optimized nose cones though a couple of them are decent profile but heavy. Can also meet prior though weather has been poor.

Cheers / Robert
Cheers / Robert
The administrator has disabled public write access.

ROCI / WSR Contests for 2019 - 2020????? 2 months 3 weeks ago #2835

  • Robert Bantly
  • Robert Bantly's Avatar
  • Offline
  • Senior Boarder
  • Posts: 70
  • Thank you received: 5
  • Karma: 2
Jim - will you be there Saturday? Also, do you have a 13mm piston?

Cheers / Robert
Cheers / Robert
The administrator has disabled public write access.

ROCI / WSR Contests for 2019 - 2020????? 2 months 3 weeks ago #2836

  • Jim Stum
  • Jim Stum's Avatar
  • Offline
  • Junior Boarder
  • 765-744-0268
  • Posts: 37
  • Thank you received: 4
  • Karma: 0
I should be there...not sure how long I can stay. Spring sinus problems already!
I plan to bring some 13mm & 18mm pistons and ground supports.
I can show how I prep and mount to the rocket.
The administrator has disabled public write access.

ROCI / WSR Contests for 2019 - 2020????? 1 month 3 weeks ago #2846

  • Robert Bantly
  • Robert Bantly's Avatar
  • Offline
  • Senior Boarder
  • Posts: 70
  • Thank you received: 5
  • Karma: 2
Jim, hope you are feeling better - I am in full Zyrtec and Nasacort mode now also. Ugh to the Midwest, every Spring. Any possibility of an email discussion on piston launchers? I would like to build a couple with some tech assistance and can continue discussion with pictures and movies. I found an article on attaching the igniter inside the piston using an inexpensive small gauge plug that prevents any off-vertical pulling of the piston tube by the leads (see Apogee Peak of Flight #374).
Since I also have an altimeter, can provide hard data on improvements or the lack thereof : )

Cheers / Robert
Cheers / Robert
The administrator has disabled public write access.
  • Page:
  • 1
  • 2
Time to create page: 0.090 seconds