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

ROCI / WSR Contests for 2019 - 2020????? 1 month 5 days ago #2821

  • Jim Stum
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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...
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ROCI / WSR Contests for 2019 - 2020????? 1 month 6 hours ago #2822

  • Robert Bantly
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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
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ROCI / WSR Contests for 2019 - 2020????? 1 week 6 days ago #2835

  • Robert Bantly
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Jim - will you be there Saturday? Also, do you have a 13mm piston?

Cheers / Robert
Cheers / Robert
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ROCI / WSR Contests for 2019 - 2020????? 1 week 6 days ago #2836

  • Jim Stum
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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.
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