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  1. TimothyG

    Line Cutter…

    An easy improvement I've found is to remove much of the chamfer on the piston. To much chamfer and it binds. I've resorted to making my own linecutters however, as it's fairly easy to make them 1/4 the weight. May not seem like much until you're doing a two stage and realize you get all 4...
  2. TimothyG

    O3400 Min Diameter L3

    It's beautiful. But looks really heavy.
  3. TimothyG

    Moving chutes, electronics and batteries

    I started off moving stuff and gave up on it after 2 years. Eventually, your interests will change enough that you'll have a variety of things to fly which cannot fly on the same chute or av bay.
  4. TimothyG

    Extended AFT Closure Idea.

    I make the sustainer motor extend out of the airframe and use the motor as my interstage connection point for min dia two stages.
  5. TimothyG

    Extended AFT Closure Idea.

    That's a helpful solution for another one of my projects but CTI's 54mm aft closure precludes the use of a turned down closure in this manner. It's a shame because they have a wonderful selection of high-performance long burn motors and I have a strict policy of not exceeding 20G's of...
  6. TimothyG

    Extended AFT Closure Idea.

    Something like this that replaces the aft closure basically extending the usage of a shorter case to a longer motor. In combination, you end up with a wonderfully consistent surface to join the interstage to the sustainer on CTI's long burn motors.
  7. TimothyG

    Extended AFT Closure Idea.

    I've been frustrated with the aft closure on CTI 54mm motors due to my inability to think of a way around the externally threaded tube with the closure I can't make work without a thrust ring. I had an idea for an extended AFT closure that I thought I'd propose and let others take the idea and...
  8. TimothyG

    O3400 Min Diameter L3

    This is the only picture I can find quickly. Eyebolt is dirty from deployment testing but it passed through the sustainer ignition setup into a threaded plug in the charge well of the motor.
  9. TimothyG

    O3400 Min Diameter L3

    I've had really great luck making my own custom eye bolts and all thread using mcmaster 7k series aluminum rod. Best of all I can adapt it to be multifunctional in the electronics bay by having the eyebolt machined directly onto the threaded rod I use to hold everything together. The only...
  10. TimothyG

    BALLS 2021

    My friends and I will be attempting to break the M impulse altitude record, for record purposes, at balls hopefully if all goes well. In addition to hopefully flying my first EX motor. And possibly an L3 if I don't get it done beforehand.
  11. TimothyG

    O3400 Min Diameter L3

    Finding a mentor on high velocity, multi-stage, high altitude, or high impulse flights is incredibly difficult in this hobby for many reasons. The biggest of which, from my perspective, is the number of people who want to do a big project, talk and plan it out, but never actually do anything...
  12. TimothyG

    Zippering

    Better to 3D print a cylinder that mounts to the shockcord to distribute the load of the cord on the tube. plus if your using motor eject it'll act as a piston to throw everything out. Position the cylinder on your cord using a not above and below so that it lines up aprox with top of tube...
  13. TimothyG

    Sold Anyone interested in 29mm Carbon tubes

    I'd take 2x30" pieces. Would be fun to fly some small stuff really high.
  14. TimothyG

    Electronics for Staged Rockets

    I started with eggtimer products to keep things cheap through the learning experience. Worked great for me so far. I don't feel a need for tilt lockout and it is NOT required for two-stage flights despite some of the misinformation put out about that. I do altitude and velocity lockouts based...
  15. TimothyG

    Lack of Interest In Contest Flying

    The most fun I have in a competition is against myself. I want each project to be safer, faster, higher, and lately more efficient. I'm absolutely wound up in trying to make my rockets so efficient that breaking altitude records is a secondary concern on the logistics of the paperwork.
  16. TimothyG

    How fast should the rocket come down

    100 fps or more on drogue, less than 20fps for landing. This is rocket-dependent. Some of my more single-use oriented rockets I tried to land at less than 40 fps.
  17. TimothyG

    AT L-1000 DMS – flying case with a nose cone and 4 fins

    Wonder if the reduction in insulation would cause the black rocket's propellant to heat up more in the sun before launch resulting in higher pressure? Would be very interesting to see data from the flight to see if you got any extra performance by preheating the rocket.
  18. TimothyG

    Mile high rocket on $1000 budget w/ 1lb payload help.

    This is the largest high-power group on the internet that i know of. If they can't find assistance and mentorship here why would they then try at a smaller local group? The comments about mentorship on this website are astoundingly repetitive, and could be argued as an impedance to the youth...
  19. TimothyG

    Mile high rocket on $1000 budget w/ 1lb payload help.

    Jolly logic chute release would be a bad idea given your budget as it would eat up a chunk of it. I was a big fan of jolly logic products but for the price given a student group, I'd recommend against it. A line cutter is simple to make for a dollar or so in the material if you have access to...
  20. TimothyG

    liftoff! gallery

    M1350 staging to K455 double stage to 49,899ft. The rocket was VERY lightweight.
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