Super Big Bertha... Awesome kit

Discussion in 'Mid Power Rocketry (MPR)' started by Jozef, Oct 10, 2018.

  1. Oct 10, 2018 #1

    Jozef

    Jozef

    Jozef

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    Pouring rain here in Central Illinois the past week, so abandoned plans to paint a HPR build and pulled Super Big Bertha from the build inventory. What a great kit. Love the laminated fin design.... just like the Mega Der Red Max. Would be great to see more PSII issues with this construction. Deviations from stock include mini rail buttons, small diameter kevlar harness, nylon chute and baffled coupler. All wood glue except epoxy for motor mount and coupler to airframe.... don't like the "grab" from wood glues. When I go to HPR launches I always bring a couple of Estes E/F fliers to settle my nerves. Nice work Estes.. IMG_6583.JPG IMG_6583.JPG
     
    Tyler P and Nytrunner like this.
  2. Oct 10, 2018 #2

    shreadvector

    shreadvector

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    IMG_0096.JPG
     
  3. Oct 11, 2018 #3

    5x7

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    Is it a normal estes thin wall bt-80 tube?
     
  4. Oct 11, 2018 #4

    Jozef

    Jozef

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    Yes. Not like the white tube in the old PSII kits which were a tad thicker.
     
  5. Oct 11, 2018 #5

    scott johnson

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    Are those C/L stunt planes I see in the background?
     
  6. Oct 11, 2018 #6

    scott johnson

    scott johnson

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    Recently completed a SBB, the fins were murder to get rounded. I tried a razor plane, ended up with 150 grit on a palm sander! Well worth the effort, it is a beautiful sight going up on an F 15.
     
  7. Oct 11, 2018 #7

    Jozef

    Jozef

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    Yup.. A classic Jet Buccaneer that is 20 years old, A rebuilt Sig ARF and two Norvell .049 powered Baby Clowns. In the shop are a few others in bones and a Fancherized Twister with a Double Star 40. Have flown Cl in years. Local club folded 4 years ago. Still fly RC. Yellow plane in background in a 89 inch MXS-R with a 60cc twin
     
  8. Oct 11, 2018 #8

    Jozef

    Jozef

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    Yup.. A classic Jet Buccaneer that is 20 years old, A rebuilt Sig ARF and two Norvell .049 powered Baby Clowns. In the shop are a few others in bones and a Fancherized Twister with a Double Star 40. Have flown Cl in years. Local club folded 4 years ago. Still fly RC. Yellow plane in background in a 89 inch MXS-R with a 60cc twin
     
  9. Oct 11, 2018 #9

    Jozef

    Jozef

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    I may round the LE only...maybe not. The rocket is intended to be "draggy" with slow liftoffs and longer burns... Got a pic of your SBB?
     
  10. Oct 12, 2018 #10

    scott johnson

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    [GALLERY=media, 3464
    79]IMG_3025[1] by scott johnson posted Aug 21, 2018 at 9:20 AM[/GALLERY]
     

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  11. Oct 12, 2018 #11

    scott johnson

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    I flew C/L back in the 1970s with my dad, had a Ringmaster with a Fox .35 and tried to get back into it a few years ago with a Skyray 35 with a Thunder Tiger .40 running a home made venturi. The years haven't been kind, got way too dizzy!
     
  12. Oct 12, 2018 #12

    scott johnson

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    I'll be launching Sunday morning if the weather is good, just had Hurricane Michael pass through SC and dump a ton of rain on us. I'll shoot some video and share. I made the maiden launch last Sunday at the ROSCO launch in Rembert, SC and totally forgot to film it!
     
  13. Oct 12, 2018 #13

    Jozef

    Jozef

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    Nice fleet of Berthas. Looking forward to your launch report. BTW, the Buccaneer has a TT40. Had a home in the OBX for 8 years... familiar with the hurricane thing.
     
  14. Oct 14, 2018 #14

    scott johnson

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  15. Oct 14, 2018 #15

    Jozef

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    Beautiful flight. What motor was in it?
     
  16. Oct 14, 2018 #16

    scott johnson

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  17. Oct 14, 2018 #17

    scott johnson

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    I want to try it on a composite 29mm, but will have to wait until Ken from Performance Hobbies shows up for the ROSCO launch in November. Hazmat shipping is a wee bit expensive, there are no hobby shops around here that sell rocketry supplies worth a hoot!
     
  18. Oct 14, 2018 #18

    scott johnson

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    BTW, I am using the stock shock cord and the trifold cord mount. 24" nylon chute from Apogee. I have a second SBB in the build pile that will get kevlar mounted to the baffle. I also use the JLCR and a nomex chute protector, but still managed to put a hole in it this am.
     
  19. Oct 15, 2018 #19

    Jozef

    Jozef

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    I've singed a couple of chutes as well. Been using a couple of sheets.of Estes PSII wadding for insurance...then the Nomex. Get it at Hobby Lobby using the 40% off coupon. Also found the Nomex from Mac Performance Rocketry to be the most resistant to blow-by and burn through. I have had several flights with CTI 3 grain F motors in a modified Big Daddy prepped as described with no issues. Hey... I did round the LE on my SBB fins. Glad I did. It looks better...more finished.
     

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