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    What do you do (or did) for a living?

    My working career began with a summer as a busboy in a steak restaurant. Worked my way through college assembling bicycles for Sears and Roebuck. Took my Mechanical engineering degree and went to work for Hewlett Packard. 19 years designing Pen Plotters and Thermal InkJet cartridges. Also...
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    What Would Be Your Next Pick For An Automobile?

    New Bronco Black Diamond. Flat tows behind the RV, Great toy to play in. Roof rack to hold a full complement of large rockets. Perfect.
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    Confused about Strain Relief Bushing for Ordinary 16/2 Lamp Cord

    No. Just speaking from experience.
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    2,460 Feet on an E-12-8

    Toss a whiffle ball, Toss a baseball with same effort. Which goes further? Balance drag forces and momentum during coast.
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    Don’t do it!

    Last week I got my Covid booster and the annual flu shot. Declined the RSV jab. Injection site soreness the next day. Thats it.
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    Obscene Materials (Humor)

    I'm sorry but I have to say it. It is THE Ohio State University. Now back to your regularly scheduled school sniping. Go Aztecs!
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    Equipe Cactus Rocket

    He is writing in Portuguese.
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    If you only buy motors with the highest letter rating, you're impulse buying

    As punishment for ALL of you. A timeout!
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    What do the BT numbers mean?

    Holy thread revival Batman!!
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    Cattle-killing rockets?

    The rule I have lived by, while backpacking and offroading is: When you get to an unlocked gate, go through it and LEAVE the gate in the state you found it in. Maybe the owner wants it open so cattle can get from food to water and back. Maybe a previous yahoo left it open and the cows are...
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    Nano rocket motor runs on H2O

    You need a source of energy to run the 20W electrolysis cell. On a satellite, solar cells and couple of batteries does the trick. On a midpower model rocket, not so much. No way around the 2nd law of thermo.
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    Estes or Centuri?

    Back in the day my first two stage rocket was a Centuri Marauder. Loved that model. Semroc was rekitting it, so I had a chance to buy another and fly it again. http://spacemodeling.org/jimz/centuri/kc-45.pdf
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    How Long?

    When they graduated college and got their first real job, we cut them loose.
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    The Bertha Family

    Another vote for the Ranger. Plus the ranger is a 3 18 mm cluster. https://www.rocketryforum.com/threads/estes-astron-ranger-k-6-or-1206-gallery.19260/
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    I suck at knots

    Yep. My mantra while tying the taut line is Two in and one out. two half hitches is One in, one out.
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    I suck at knots

    To attach a shroud line to the parachute (lpr) I use two half hitches. Fast, simple and it does not come loose. I love the taut line hitch. Adjust the length of sunshade or rainfly guylines WITHOUT one of the little plastic or metal doohickeys, just rope. PFM! PS, my user name is short for...
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    Launch controller circuit animation - Eyes-on and opinions welcomed

    And the day you want to launch a hydraVII with 7 igniters wired in parallel? Resistance is much reduced and therefore the current flow increased.
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    Estimating Drag Force using Telemetry Data?

    After motor burnout, the equation simplifies to -G-Drag= mass* acceleration. No assumptions about thrust curve required.
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    "Why do EV's need to accelerate like "supercars", with only a 300 mile range, when 50% of that power would double their range ?

    "Here are your winnings sir"
  20. A

    3D Printing 3D Prints and Hot Cars in the Summer.

    Just sort the resins by their Heat Deflection Temperature (HDT)
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