What did you do rocket wise today?

Discussion in 'The Watering Hole' started by BeerorKid, Jan 31, 2013.

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  1. Nov 5, 2018 #19981

    Rocketjunkie

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    Finally got to test fire my 98/20480 (not a typo - Rx case) N1030.
     
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  2. Nov 5, 2018 #19982

    Leo

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    Thanks. As soon I have everything together I will be posting this model on Thingiverse so everyone else can print and build this rocket.
     
  3. Nov 5, 2018 #19983

    Leo

    Leo

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    That was a nice long burn!
     
  4. Nov 5, 2018 #19984

    Flyfalcons

    Flyfalcons

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    More fillet work on the Nike-Apache. Closing in on finishing basic airframe construction on the two-stager.
     
  5. Nov 5, 2018 #19985

    mpitfield

    mpitfield

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    Wow what is the burn time on that one?
     
  6. Nov 5, 2018 #19986

    GrouchoDuke

    GrouchoDuke

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    Dude. Wow.

    Supports?
     
  7. Nov 5, 2018 #19987

    Rocketjunkie

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    The N800 burns 17 seconds, with the stepped core on this one, probably a little longer. Haven't counted frames yet.
     
  8. Nov 5, 2018 #19988

    mpitfield

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    "stepped core" I have not seen that one. Off-set core moonburner is the only long burner I have seen. I am assuming this is not commercial and specific to EX?
     
  9. Nov 5, 2018 #19989

    Rktman

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    Eric Noguchi

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    Finally finished a scratch build that’s been on the drawing board since August, an experimental mid-size (A-C) canard designed and built during spare moments and between other builds. Just wanted to see if a glider newbie like me could actually get something airworthy and flyable out of everything I’ve been reading.

    Why a canard? Because they’re harder to get right than “normal” gliders, so crafting something that successfully flies well is so much more satisfying. Besides, “tail first” is so much cooler IMHO.

    Length 18.75” | Wingspan: 17” | Weight: 1oz

    Kestral.JPG


    2nd pic is the cardboard prototype that I fine-tuned canard and rudder sizes with.

    Kestral prototype.JPG

    (Apologies for the full size pics, "attach thumbnail" wouldn't work).
     

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    Last edited: Nov 5, 2018
  10. Nov 5, 2018 #19990

    markkoelsch

    markkoelsch

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    Nice burn. I have a question for you- did you measure the case temperature during the burn? Thermocouple of some other method. Burning that long that has got to get hot.
     
  11. Nov 5, 2018 #19991

    Rocketjunkie

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    The motor is a D grain. Cast a solid stick and slice off the side. Most of the grain has a 2.4" wide flat, the last 13" has a 2.8" wide flat. (Area of port is equivalent to 1" and 1.5" round cores respectively.) The N800 is 2.4" all the way. Both motors have a short U shaped booster grain to increase liftoff thrust.
     
  12. Nov 5, 2018 #19992

    Rocketjunkie

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    The only temp indicator is a piece of masking tape on the side of the case where the port is located. (This also helps when installing the starter.) No discoloration of the tape and I have used the same case 7 times for N800s (RMS 98/15360) with no problems.
     
  13. Nov 5, 2018 #19993

    mpitfield

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    Sounds very interesting. I don't want to cross the line into the research forum so I will refrain from soliciting more details, even though I am curious.

    Thanks for the info.
     
  14. Nov 5, 2018 #19994

    Leo

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    Hot off the printer..... because the translucent fin can turned out great I thought I would add a nose cone as well. Next probable print... translucent launch lugs :)

    Nike_Smoke_BT-55_Clear_Nose_Cone.jpg
     
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  15. Nov 6, 2018 #19995

    gdjsky01

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    Fantastic... let see it fly!
     
  16. Nov 6, 2018 #19996

    Eric

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    Those parts, paired with a Mach1 Rocketry BT-60 tube. Thier super thin wall fiberglass is just as translucent. Would make a great night flight rocket.
     
  17. Nov 6, 2018 #19997

    krislhull

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    Finished construction on the Baby Bertha today... now have two members of the Bertha family waiting on paint.

    5D560017-EEB7-4238-9B9E-502DFB371980.jpeg

    I also received some new cases today! Looking forward to trying the 18mm and 24mm reloads for the first time! Now all I need is the 24/60 case, and I have a complete set of Aerotech mid power cases! D38B7BC5-5B4E-4573-B8F6-CC7BDB5B5C75.jpeg
     
  18. Nov 8, 2018 at 12:16 PM #19998

    snrkl

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    Received my explosives license today, so I can now legally take HPR motors and buy/take home BP home with me!

    I’m off to try to find some FFFF tomorrow. I’m sure it will be complicated and weird (I’ve NEVER even entered a firearm store before).
     
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  19. Nov 8, 2018 at 12:28 PM #19999

    DM1975

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    You’ll survive :D
     
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  20. Nov 8, 2018 at 2:19 PM #20000

    krislhull

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    Started prepping for this weekends launch last night... Prepped two motors, plus one left over from last month, and got the avionics bay of the ARCAS all ready for flight.
     
  21. Nov 8, 2018 at 2:32 PM #20001

    jlabrasca

    jlabrasca

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    Just don't bring up the first clause of the second amendment... oh, right. Australia. Congratulations on the license.
     
  22. Nov 8, 2018 at 11:45 PM #20002

    snrkl

    snrkl

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    Well turns out BP requires the vendor to carry additional licenses over those needed for pyrodex powders.

    Managed to find one, but it’s on the other side of town. Looks like I’m in for a LONG drive today.

    While I could use pyrodex it would mean changing the config of my L2 two days before the cert flight and I don’t have time to RE-ground test.

    And given the smallest quantity you can buy is 1kg, I won’t be needing more ANY time soon.
     
  23. Nov 9, 2018 at 11:12 AM #20003

    snrkl

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    Built a motor reload and black powder storage chest:

    IMG_0511.jpg
    IMG_0512.jpg IMG_0513.jpg

    Drilled the front rivets out and popped the spot welds
    IMG_0514.jpg

    This allowed me to slide the wood panels in.

    IMG_0515.jpg

    Lots of screws from the outside to secure the wood.
    IMG_0516.jpg
    IMG_0517.jpg

    And a dremelled slot for the lock mechanism.

    IMG_0518.jpg
     
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  24. Nov 9, 2018 at 3:15 PM #20004

    Rktman

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    Eric Noguchi

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  25. Nov 9, 2018 at 3:34 PM #20005

    Banzai88

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    I got my hands on a Pole Cat Thumper complete with DD ebay and 54/38 cluster rings!
    [​IMG]
     
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  26. Nov 9, 2018 at 3:44 PM #20006

    Alan R

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    Fixed an old R2 I found in the bottom of a box. Drilled some holes and gave him a new through-the-body shock cord. IMG_20181109_073957155.jpg IMG_20181109_074029460.jpg
     
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  27. Nov 11, 2018 at 9:22 AM #20007

    snrkl

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    BDB likes this.
  28. Nov 11, 2018 at 11:31 AM #20008

    Leo

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    I decided to 3D print a complete see-through (translucent) Nike Smoke.
    Here the parts. The motor tube will be a standard Estes BT-20.

    Nike_Smoke_Parts.jpg
     
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  29. Nov 11, 2018 at 12:54 PM #20009

    RocketMnky

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    That's cool! How much does it cost and weigh compared to a regular balsa/paper config?
     
  30. Nov 11, 2018 at 1:10 PM #20010

    Leo

    Leo

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    This is BT-55 based size. Approx 2.4 oz less motor. I haven't a clue as to how much it cost. Would need to calc. materials, power consumption and time.
     

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