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Welcome to IndyRockets

This site was created as a resource for anyone interested in hobby rocketry in central Indiana.

This is also the source for information on the Rocketeers Of Central Indiana (ROCI), Section #625 of The National Association of Rocketry (NAR). Feel free to check here for information about ROCIs launch events. The launch events are conducted throughout the warmer months at the Academy of Model Aeronautics' Headquarters and Aeromodeling Center in Muncie, Indiana. This facility is the finest flying field in the state and ROCI is proud to be the exclusive host of the rocketry events held there. ROCI is not currently conducting meetings as we have lost our meeting place.

Registered users of this site are free to visit our forum pages to discuss rocketry topics and share information with other members.

Please register to join the fun and keep 'em flying.

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ROCI / WSR Contests for 2019 - 2020????? 10 months 4 weeks ago #2821

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????? 10 months 3 weeks ago #2822

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????? 10 months 5 days ago #2835

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????? 10 months 5 days ago #2836

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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ROCI / WSR Contests for 2019 - 2020????? 9 months 1 week ago #2846

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

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