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

ROCI / WSR Contests for 2019 - 2020????? 4 months 2 weeks ago #2814

  • Robert Bantly
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NRC events for 2019-2020 Contest Year Announced (Updated 7.1.19)
Per rules 13.1.1 through 13.1.2 of the United States Model Rocket Sporting Code (USMRSC), the NAR Contest Board has selected the following 6 NRC events for the 2019-2020 contest year, including NARAM 62:

1/2A B/G Boost Glider A3-4T
1/2A SD Streamer Duration A3-4T
1/2A HD Helicopter Duration A3-4T
1/2A PD Parachute Duration A3-4T
1/2A ALT Altitude A3-4T
B Payload: B4-6 (Quest or Estes) or 2 stage A10-0T/A3-4T


For B Payload:
I have an Apogee Frit 18mm single stage payload kit I am planning on fitting with carbon fiber fins if I can find some material for a B payload test.
And here are plans in Sport Rocketry for a 2-stage mini "B" payload kit. The 2 stage entry is considered superior due to 13mm diameter vs 18mm and "ditching a stage and resultant drag" during flight. But with the Quest composite motor, that may be changed.

www.nar.org/wp-content/uploads/2020/01/A...13mm-Motors-Wolf.pdf

Some requirements for even placing in comp are:

13mm / 18mm Pop Launcher (lose the lugs, gain some free acceleration)

Tri-form fins usually elliptical though Apogee made a good case for rectangular fins [but didn't use them in comp]

Adrel BMP Altimeter (0.6 grams less battery)

1/32" carbon fiber for fins

Minimal paint AND a smooth finish (seems a little counter-intuitive) :lol:

Someone who is skilled in making para-sheets out of dry cleaning bag - again, for weight reduction not duration. Don't think you can get below ideal weight in either model.


Are the club(s) interested in investing in a Pop Launcher and/or an altimeter for contest flying and getting a group together? We can compete against each other in the events, though it is a late start. Does anyone have a "pop" launcher built or want to build one?

Also, I have been reading - are multiple entries allowed, can a person fly several models and choose the best or is this done prior to the actual contest?

IMO, either way, the Frit is a good start for either kit with the super-light 18mm parabolic cone and well designed section for payload/altimeter.
Cheers / Robert
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ROCI / WSR Contests for 2019 - 2020????? 4 months 2 weeks ago #2816

  • Jim Stum
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Robert
If the contest site allows sport flights then yes, you may make as many sport flights as you want. You may not pick a sport flight and submit it for a certified flight. When you are ready to make contest flight, fill out the proper flight card and submit it to the CD/RSO/... and make your flight. does that help?
Jim
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ROCI / WSR Contests for 2019 - 2020????? 4 months 2 weeks ago #2817

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Robert
Are you referring to a piston launcher? or a pop lug? or something else?
for most flights a tower is the best
Jim
Last Edit: 4 months 2 weeks ago by Jim Stum.
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ROCI / WSR Contests for 2019 - 2020????? 4 months 2 weeks ago #2818

  • Robert Bantly
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I am referring to a piston launcher. On these very small light-weight kits, I think it may be the best for competition. The Frit is 0.54oz total less NAR payload weight and motor and so ideal for a piston launcher. Does anyone have a piston launcher or want to build one that can be switched 13/18/24mm? I will provide awesome Sherwin-Williams paint for it.

On setting up for a "B" payload official flight: means I can sport fly the Frit and the 2-stage mini design out of Sport Rocketry. Then, pick the superior one and submit for a contest run. The goal here isn't for me to win anything - it's to have a contest and learn some aerodynamics for a more serious effort down the road. :cheer: New life.

Would also like to run a SD kit and have a couple sheets of .016 G10 on the way for contest kits I am willing to share. The Frit with 1/64 G10 fins will be the "apple fritter." We'll see if it survives a landing.

Build a piston launcher? Get a Adrel ATL-BMP contest altimeter?

Cheers / Robert
Cheers / Robert
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ROCI / WSR Contests for 2019 - 2020????? 4 months 2 weeks ago #2819

  • Jim Stum
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I have several piston launchers and make them all the time...they do wear out.
Piston launchers are very simple devices that really work. They are very easy to build but will require many flights to learn to tune them.
Don't waste money buying kits. All you need is a piece of body tube 13/18/24mm , same size as the motor, a tube coupler, a centering ring, and a wooden dowel rod. Seal one end of the coupler with a thin piece of balsa with epoxy covering the top. That surface will receive the motor's blast. Sand the outside of the coupler to be a snug/slip fit inside the tube. Glue the centering ring to the bottom end of the body tube. The dowel rod will easily slip thru the ID of the centering ring and long enough to be grounded. I typically use 3' or 4'.
I suggest beginners test fly by sticking the dowel in the ground not using a tower or launch rod. Don't try optimizing the launcher until you have maximized altitude with repeatable launches from the fit to the motor.
I would be happy to meet with anyone who wants more detail on building and launching with a piston.
Jim
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ROCI / WSR Contests for 2019 - 2020????? 4 months 2 weeks ago #2820

  • Robert Bantly
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I am definitely interested and am hoping someone else is. I found a how to build a piston launcher article but good tuning with several near identical kits = best height. The tuning process isn't really described either.

If you want to have a piston launcher meet prior to sport fly day, I am in.

In the meanwhile, will order up parts for the 2 stage mini for B payload and an ASP Thermal Seeker 13 for SD. I have all required parts to construct a 13/18/24mm piston launcher and an old Apogee article that puts leads through the piston head to prevent "pull" on the rocket. Apogee Newsletter #374.

www.apogeerockets.com/education/downloads/Newsletter374.pdf

I will buy the Adrel ATL-BMP if there is ONE other person interested in competition - we could have several contests between ROCI and WSR, possibly get the Lafayette or Terre Haute clubs involved also. Again, due to cost, the altimeter will be available to all.

When a good tuned piston is available, I have a nice mic stand for a tripod.

Cheers / Robert
Cheers / Robert
Last Edit: 4 months 2 weeks ago by Robert Bantly. Reason: add stuff
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