Level 3 kit bash

Discussion in 'High Power Rocketry (HPR)' started by David Schwantz, Aug 3, 2019.

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  1. Aug 3, 2019 #1

    David Schwantz

    David Schwantz

    David Schwantz

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    Got the new kit Thursday, statred life as a Mad Cow Frenzy Massive. Will have to wait to see what it will end up as. 98mmt, will fly first with a 75mmt and AT 1350M, simmed to about 6200'. Eggtimer Quark and Quantum for alt's. Wide angle camera in the AV bay looking out horizontial. Rotary and pull pin switches along with the Quantums wifi switch. Swapped out hdw to SS 5/16". Added thrust plate, that thing is pretty sweet. Built fincan with fin troughs made from 1/8" 5 ply aircraft grade, tacked in place then glued with a layer of carbon fiber covered by 6 oz glass layed on the bias. CRs glued with hysol 9462. Added 2 extra CR, one for each fin end and another for the thrust plate along with 1/4 ply CR for the blind nuts to sink into. NC bulkhead is removable, CR made from 1/4 ply and G10 is glued and pinned into NC shoulder. NC bulkhead is then attached with 8 SS 8-32 socket head screws. Mad Cow fins come beveled only on LE, had to add matching bevels on all surfaces.
     

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    Last edited: Aug 3, 2019
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  2. Aug 3, 2019 #2

    David Schwantz

    David Schwantz

    David Schwantz

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    More.
     

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  3. Aug 3, 2019 #3

    David Schwantz

    David Schwantz

    David Schwantz

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    Camera and switch mounts. Reovery attachment. Lower rail button mount, using 15 size airfoiled buttons. Recovery harness, 5/8" tubular kevlar, 1100 lb swivel sewn into harness. Both ends have third loop for drouge and chute attachment. Fins finished, all beveled, sanded, cross hatched, and drilled.
     

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  4. Aug 21, 2019 #4

    David Schwantz

    David Schwantz

    David Schwantz

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    Got to work on Av bay.
     

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  5. Aug 21, 2019 #5

    Tim51

    Tim51

    Tim51

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    Impressive work. Did you design the camera mount yourself or is it Lab Rat ? ( I'm guessing the orange looks like LR, but can't see it on the website)

    Good luck with the cert.
     
  6. Aug 21, 2019 #6

    MikeyDSlagle

    MikeyDSlagle

    MikeyDSlagle

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    What's the brass you're using for charge canisters.
     
  7. Aug 22, 2019 #7

    David Schwantz

    David Schwantz

    David Schwantz

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    Nopee, neither. it came with the camera, Action Cam from Amazon. the brass are 45-70 shells. Holds 4.3 grams each.
     
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  8. Aug 22, 2019 #8

    MikeyDSlagle

    MikeyDSlagle

    MikeyDSlagle

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    Cool. A colleague at work hunts with the 444 Marlin and brings me his spent brass to use for charge wells. I come across empty "Ma Duece" brass quite regularly, cut the neck off and they work well too, although a bit on the large size.
     
    Last edited: Aug 23, 2019
  9. Aug 23, 2019 #9

    David Schwantz

    David Schwantz

    David Schwantz

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    I got lots if you need some.
     
  10. Sep 1, 2019 #10

    David Schwantz

    David Schwantz

    David Schwantz

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    A word of warning, do NOT use brass shell casing for charge wells. Flew my 3" Black Hole at last launch, she came down with a few chunks gone. Did not really know what did it. I know that they can bang together under drouge, but this had gouges missing. Well today when I was prepping for another flight I found that my 45-70 shell casing were mushroomed. This is what did the damage to the body. Removed them from the 3" and from the new one I am building. So made new ones from aluminum bar stock, chamfered on the inside as to not cut into wiring. Each will hold 2.6 grams of BP. More than enough, ground tests were at 2.0 for the booster and 1.8 for the payload sections.
     

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  11. Sep 2, 2019 #11

    beeblebrox

    beeblebrox

    beeblebrox

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    Just use spent estes casings... they are light and non conductive and easily replacable. put a screw thru the nozzle hole. Cut to length.
     
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  12. Sep 21, 2019 #12

    David Schwantz

    David Schwantz

    David Schwantz

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    Finished Av Bay and the NC mounting plate for the tracker and Nose weight.
     

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  13. Sep 22, 2019 #13

    David Schwantz

    David Schwantz

    David Schwantz

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    I have the worlds largest "Black Hole"!
     

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