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  • PaulA23 commented on LabRatMatt's instructable Hybrid Rocket Engine1 week ago
    Hybrid Rocket Engine

    Research. This is nothing more than someone researching the physics of what makes a rocket work, and is no more dangerous than a "real" model rocket. There isn't any "telling it like it is" because the OP has already REPEATEDLY noted the dangerous nature of the project, as well as the valuable lessons learned. Whatever happened to experimentation and (God forbid) helping, thereby increasing knowledge for all who stumble across the information?

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  • PaulA23 commented on justget7's instructable How to Make Rocket Candy1 week ago
    How to Make Rocket Candy

    Best Rocket Candy instructable I've read so far. It is detailed with specific information, & easy to follow. Good job! :-)

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  • How to Convert Water Into Fuel by Building a DIY Oxyhydrogen Generator

    Grumpy, the Hydroxy gas is "taking up space" that used to be dedicated to air in the intake, thereby changing the stoichiometric ratio of the gasoline, and thus negating any gains you might have received by using the Hydroxy. The only way to "add" the gas to the engine is with positive pressure (ie, boost) instead of just letting the engine pull it in...I hope that makes sense; if not, please let me know & I'll try to explain it better...

    Funny, it's a +1 on the Mythbusters to my earlier reply... :-)

    "There's no free lunch" which the OP kindly pointed out... :-)The only way to do this vehicle effectively is to make the Hydroxy using some "free" energy such as solar. This would need to be a base station of sorts, since the square footage required would be too large to fit on a vehicle, then devise a system to transfer the collected hydroxy to the vehicle. I'm curious as to the maximum psi electrolysis could produce in the collector before production halts... Does anyone happen to know?I'm researching, but haven't found any concrete numbers yet...Anyway, that's my excessively long way of saying "you're right" lol. :-)

    ...not to mention that said politicians are making BILLIONS off the oil industry, and therefore alternate energy technologies are squashed or made EXCESSIVELY expensive (like solar panels). Technology for 40+mpg cars has been around for quite a while, but yet... (See 1985 Honda Civic CRX HF, yes, that's 1985...)

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  • How to Convert Water Into Fuel by Building a DIY Oxyhydrogen Generator

    ***...that should be a pre-OXIDIZED fuel...

    I apologize for all the typos; this phone seems to think it knows "what I'm trying to say" instead of just repeating exactly what I type, lol

    I'm sorry, but all 3 of your answers are wrong, uneducated guesses...1-Oxyhydrogen *IS* the proper name of the gas produced by water electrolysis: https://en.m.wikipedia.org/wiki/Oxyhydrogen2-"Hydroxy"gas *IS* indeed a proper nickname for said gas: https://en.m.wikipedia.org/wiki/Hydroxy3-Water (vapor) *IS* indeed a byproduct/result of burning said gas: http://hydroxyenergy.com/index.php?dispatch=pages.view&page_id=7(It is also just about the cleanest burning fuel there is).Although I already knew all of these, a quick 15 sec Google search confirmed them. Please at least attempt to research before making bold statements that could be (embarrassingly) false. :-)

    You are correct - VERY dangerous because (unlike most fuels) this fuel is already oxidized, so ONLY heat is needed to complete the fire triangle, which the generator itself comes dangerously close to providing enough of at higher voltages...Readers, PLEASE be careful if you build a higher voltage & more heat tolerant version of the OP's generator; you are literally building a bomb with an unknown trigger...At the VERY least, ensure that your Hydroxy collector/storage tank is very remotely mounted, with anti flowback/check valves to decrease the chance of accidental explosion.A pre-existing fuel is VERY volatile. If you've never heard an oxy-acetelyne torch *POP*, it's starting & scary...Just trying to help us all stay safe! :-)

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  • PaulA23 commented on carkat's instructable Fail: a Full Tilting 3-wheeled Cargo Bike2 months ago
    Fail: a Full Tilting 3-wheeled Cargo Bike

    So completely NOT a fail!!! Too many instructables are just "TADA! Finished product!" without giving the readers an idea of the difficulties and lessons learned in the project. The finished product is only a tiny portion of the reason(s) we enjoy these articles; the road is MUCH more informative than the destination. You materialized your concept into reality, learned some things, and COMPLETED THE PRODUCT (huge hurdle for many). This is the epitome of successful R&D - I applaud you, thank you, and encourage you to continue; you're only one moment of enlightenment away from the next big idea/design that no one else has thought of, and the world of cycling is a huge one. Excellent job!

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  • PaulA23 commented on randofo's instructable Telepresence Robot: Basic Platform (Part 1)2 months ago
    Telepresence Robot: Basic Platform (Part 1)

    Finally!!! An awesome instructable using the tried-and-true tinker methods we enjoyed before the 3D printer explosion!!! Sure, 3D printers are awesome, but so much ingenuity is lost when you can just materialize your parts. Great instructable! :-)

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  • PaulA23 commented on rachesv99's instructable Bluetooth Headphones Conversion8 months ago
    Bluetooth Headphones Conversion

    I was in the US NAVY for several years as an Aviation Electronics Tech, but I can promise you that I've learned more from "learn as you build" than any electronics teaching I've ever had!! :-)I've converted several old headphones to Bluetooth - in fact, many friends & family laugh because I'm always saying "hey, let's put Bluetooth on it" almost every time I see something electronic, lol! The charging port & amplification issues are valid concerns (mainly due to charging polarity & speaker impedance), but let's face it: if the speakers or electronics get fried, then you've already gained more in knowledge & experience than the ~$10 cost of the project. :-)If you do version 2, I suggest using the internals of a Bluetooth speaker instead of the hands-f...

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    I was in the US NAVY for several years as an Aviation Electronics Tech, but I can promise you that I've learned more from "learn as you build" than any electronics teaching I've ever had!! :-)I've converted several old headphones to Bluetooth - in fact, many friends & family laugh because I'm always saying "hey, let's put Bluetooth on it" almost every time I see something electronic, lol! The charging port & amplification issues are valid concerns (mainly due to charging polarity & speaker impedance), but let's face it: if the speakers or electronics get fried, then you've already gained more in knowledge & experience than the ~$10 cost of the project. :-)If you do version 2, I suggest using the internals of a Bluetooth speaker instead of the hands-free kit. The electronics are still fairly small, but give you a better amplification circuit for the impedance (resistance) of your headphone speakers. Most cheap ones combine left & right into a single channel, but it's fine for headphones, & you can buy them for $10 USD new @ Big Lots & WalMart (or your local "super" store). As for charging port, you can use a small audio jack, then re-use the old headphone cord as the charging cord - USB 2.0 charging spec is only 2.5 Watts (500mA @ 5Volts). :-)Excellent job - you made your idea a reality, & that's what matters!! :-)

    Most headphone speakers are more on the order of 16->32 Ohms, so lack of volume would be more prevalent than distortion (overdrive). However, the high impedance could definitely cause the preamp to lose its magical blue smoke if the input signal is driven too high, but since it's an isolated, self-supplying circuit (not hardwired line in, but 2.4GHz carrier + audio signals decoded to "line in"), that's unlikely to be an issue here. :-)Hopefully I can get my synchronized Bluetooth surround sound speakers working soon - synchronizing the signals is HARD... :-)

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