Solid fuel

Hello. I am new to this site. I've always had an interest in Model Rocketry and have built a lot of small scale rockets and launched them with store bought engines over the years. I've always wanted to build larger scale rockets and learn how to make my own solid propellant to fuel them but never knew how to get started. Any advice?

Topic by CoolRidge69Vette 9 years ago  |  last reply 9 years ago


THE WAX IN SOLID PERFUME ?

DOES IT MATTER WHAT KIND OF WAX TO USE WHEN MAKING YOUR SOLID PERFUME,

Question by bmatthews2008 9 years ago  |  last reply 8 years ago


Semi-Solid Material? Answered

I was hoping anyone knew of or had a good suggestion for a material that fits my description. Either a rubber- like material that was softer (more malleable) than rubber, but tougher to prevent tearing or a putty-like material that would change to a firm solid when heat or a current was applied. I need something that can be molded to a specific shape and then hardened to hold that shape, but can later be returned to the non-molded shape.

Question by Sserdna 4 years ago  |  last reply 4 years ago


solid state relays

I have four, 5A, 280V solid state relays. They are activated by 3-8V. I need to tie them together so that I end up with a total of 20A. Do I tie them in series, or parallel? Also, do I tie the inputs in series or parallel so that there is one input? Thanks.

Topic by gimmelotsarobots 9 years ago  |  last reply 9 years ago


Is a bubble a liquid or a solid?

Well what is it

Question by NuclearGreyhound 10 years ago  |  last reply 10 years ago


CAD/CAM SOFTWARE?

Hello, i am T.Y. Mech Engg. student. I want to know how software's like PRO/E are made. I mean how do they create the graphics (links of free download available graphics library's would be appreciated). Also how do they connect that(graphics) with their kernel? I know c++ already, which else languages or concepts do i need to know to create such a software? Also i would like to know how FEA is integrated in these software's. Expecting detailed reply's from all the experienced people who have worked on PARASOLID or Granite (PTC) or any other CAD/CAM software!

Question by coepian 7 years ago


Metal Gear Solid: Big Boss Costume

Hey all i was wondering if anyone can help me in constructing the Big Boss costume im planning to take it to a convention :P also what type of hairstyle does he have? i cant tell xD ty all who help

Topic by Yosaime 10 years ago  |  last reply 6 years ago


Will a SSR work with a PWM signal?

Hey guys gotta quick question: I need to be able to cut a PWM signal from a motor for a project. I'm currently using mechanical relays but I'm curious, will a solid state relay work? I know there are easier ways to do this but for right now I'm on a clock and I just want to  know whether a SSR will work for cutting a PWM signal.  Thanks guys!

Topic by HavocRC 2 years ago  |  last reply 2 years ago


Metal Gear Solid Guns

I'm also looking for guns from one of the greatest games (at least to me), Metal Gear Solid. My top 5 requests are: 1. The SOCOM 2. The USP 3. The FAMAS 4. The Mauser C96 (The gun Eva uses in Snake Eater) 5. P90 (The gun Solidus Snake uses in Sons Of Liberty) Of course, all other guns from Metal Gear will also be appreciated as well, so if anybody who knows where I can find the instructable for any of these, or if anyone knows how to make it themselves (or is up to the challenge of trying to make them), please reply and tell me where to go (or what it will be called, if you need time to make it and put it up). I believe that it is possible to make at least 2 or 3 of these guns. Thanks to everyone that joins in the cause of making these guns, or at least telling me where to find the instructables for them, and happy building.

Topic by Knexfan 11 years ago  |  last reply 10 years ago


Solid State Sensors? (Very Edited)

What properties of an environment can be measured with solid state sensors? Specifically, I am thinking of a project requiring a suite of sensors-on-chips that can measure their immediate (dry) environment and pass the data to a control unit.So far, I know of temperature, magnetism, radiation, acceleration and light (a camera chip).Are there any other (reasonably priced) solid state sensors, and where could I find them (either new, or reclaimed from something else)Edited:OK, so I thought I could be vague about my questions and then surprise everybody with a working satellite.Turns out I'm not so clever as I thought.I'm trying to recreate Sputnik on a tiny budget. Something that could be made by Joe Public, without having to rely on grants or Lottery funding.Sputnik weighed nearly as much as I do, but all it did was measure temperature and pressure, then send beeps that changed if the temperature or pressure went outside a certain range. I know it has been outdone by students with CubeSats, but they still cost tens of thousands of dollars.I thought that it should be possible to recreate (and out-do) Sputnik's capabilities on a single board, a simple programmable control chip taking in the data from a set of sensor-chips encoding it somehow, then passing it to a transmitter to be beamed to Earth.I thought - still thinking micro-budget - that the whole thing could be cased in a short piece of sealed PVC tubing, since PVC is radio-transparent.In my head, in fact, the satellite looks like a relay baton, but shorter.Am I being stupidly optimistic?

Topic by Kiteman 10 years ago  |  last reply 10 years ago


best schematic for a solid state tesla coil? Answered

Can anybody please help me with a sstc schematic? I'm thinking of building a sstc for an exhibition in my school and so i might need to run it for quiet a long time(like for a day with 5min intervals), and so it shouldn't overheat and die. Though I've found some designs especially the steve ward's sstc schematic, the problem is I couldn't get the ucc37322 & ucc37321 gate driver ICs, a suitable and more available substitute would be fine(I live in India). And which mosfet should i use for this purpose, i would be running it at 220v straight from the mains(in a H-bridge confg). And is the following audio modulator going to work with this?

Question by jasshopper 5 years ago  |  last reply 1 year ago


How to make a solid deodorant?

Question by AbleOutdoors 8 years ago  |  last reply 8 years ago


solid state relay information Answered

Do I need to apply voltage to pin 5 for it to switch on chip Vishay VO14642AABTR? http://www.alldatasheet.com/datasheet-pdf/pdf/443188/VISHAY/VO14642AABTR.html

Question by jbaker22 6 years ago  |  last reply 6 years ago


The Long-Term Viability of Solid-State Storage?

The following is a hypothetical (for now...): What Is The Long-Term Viability of Solid-State Storage? So, what does that mean? Well, I am asking about the viability and chances of data or hardware corruption of solid state storage if left in a relatively clean environment for...say...100 years, would it last? More specifically, if it were a boot drive, would it still boot? I am sure some of you will have viable alternatives to solid-state for this purpose I have not considered, which is why I am asking publically. I am trying to ensure the safety of important data over long-term (100+ years) storage and usage. Are there any recommendations/issues or alternatives any of you can think of which would decrease the chances of data loss over such a time?

Question by KyleBriggs 2 years ago  |  last reply 2 years ago


boat bottom 4 raft

I have an inflatable raft I want to put a firm (solid) bottom in--need ideas from all--its 41" x 106"--once I have a bottom I want to use w/ a trolling motor--Thanks in advance for any & all suggestions

Topic by zucchini 6 years ago  |  last reply 6 years ago


MGS5's iDroid - Can it be Built with Open Source Tech?

I can't get enough of Metal Gear Solid 5! It definitely deserves the 10/10 scores its received! But as cool as it would be to have a giant robot or even a Walker Gear that you and/or your enemies can pilot, I think the coolest thing to have from the game would be the "iDroid". If you havent played "The Phantom Pain" or "Ground Zeroes", the iDroid is a device Snake uses for multiple purposes. Some include: sending radio trasmissions and calling in supply drops or helicopters between the iDroid's location and Mother Base, Displaying a topographical satellite view of the area Snake is in, Organizing Mother Base staff, resources, R&D; projects, and playing music from cassette tapes found while on missions, Just to name a few. (bold font is to differentiate the uses) So is it possible to build a similar device using the open source technology of today? (minus the use of cassette tapes and a 2D holographic projection screen) I'm pretty confident that it can be done, but what do you guys think?

Topic by EngineerJakit 3 years ago


MGS5's iDroid - Can it be Built with Open Source Tech?

I can't get enough of Metal Gear Solid 5! It definitely deserves the 10/10 scores its received! But as cool as it would be to have a giant robot or even a Walker Gear that you and/or your enemies can pilot, I think the coolest thing to have from the game would be the "iDroid". If you havent played "The Phantom Pain" or "Ground Zeroes", the iDroid is a device Snake uses for multiple purposes. Some include: sending radio trasmissions and calling in supply drops or helicopters between the iDroid's location and Mother Base, Displaying a topographical satellite view of the area Snake is in, Organizing Mother Base staff, resources, R&D; projects, and playing music from cassette tapes found while on missions, Just to name a few. (bold font is to differentiate the uses) So is it possible to build a similar device using the open source technology of today? (minus the use of cassette tapes and a 2D holographic projection screen) I'm pretty confident that it can be done, but what do you guys think? (btw i also have the same topic in the Tech section, cuz i figured that would fit well probably)

Topic by EngineerJakit 3 years ago


Are there Dremel attachment(s) meant for removing or shaping solid aluminum? Answered

First, I'll explain the background for my question.  I've been meaning to make a 1000 lumen Maglite (Jayrob from CandlePowerForums conceived the design-look it up, it's awesome).  I can get the heatsink from CPF vendors but they come with a 14.5mm diameter pedestal.  I want to reduce the diameter of the pedestal, ideally to less than 12.5mm in order to use a reflector with a smaller hole. So, which Dremel rotary tool attachment(s) would be appropriate for removing and/or 'shaping' aluminum?  Any ideas, other suggestions, or musings?  Thanks.

Question by OmniWrench8000 7 years ago  |  last reply 7 years ago


OS on SSD vs OS on HDD

If I decide to build a computer should I put my primary OS on a Solid State Drive? Would this make it more stable/improve performance any? Or should I just stick with a regular hard drive. Thanks for any help.

Topic by Triblade101 10 years ago  |  last reply 10 years ago


Is there any solid that melts at a lower temp?

 Matter can change states. Most solids need an increase in temperature to melt. Is there a solid that can melt at a lower temperature.

Question by joyce kane 9 years ago  |  last reply 9 years ago


best solid material that dissolves in water? Answered

I need a solid material I can easy get, it should stay solid when exposed to air, for long periods, and when it comes into water, it should dissolve. What material would be the best choice? edit: It should stay firm for about 5 years. When in water, it needs to dissolve as quick as possible.

Question by merijnvw 9 years ago  |  last reply 2 months ago


What is this component? is it a solid state relay? Answered

I want to know if it is a solid state relay. i got it in an old photocopier matsushita. on the component it is written  sf16drz-h1-4 input    DC4~7v OUTPUT  AC 210V 16A K975c MITSUBISHI Electric it has 4 leads out. 2 small and 2 big. I googled it but no success and if you know explain to me how this component works. it has  a large heatsink on the top

Question by ARJOON 8 years ago  |  last reply 8 years ago


How to dye stockings in a solid line?

I want to dye a pair of stockings in 2 different colors (Black at the bottom till about mid thigh and white for the top of the leg and gusset) I know you can use food colorant or kool-aid to dye stockings, that's fine. My only problem is that I want it dyed in more or less solid line, I don't want the 2 colors bleeding into each other. Does anyone know how to accomplish this? or have any ideas? THX

Question by lpringiers 5 years ago  |  last reply 5 years ago


Solid state Tesla coil circuit? Answered

In this SSTC circuit from Uzzors2K I am a bit confused were the 12V and ground actually connect to seeing that this is a AC circuit? Also seeing as the AC is immediately rectified (I think you can do it with a bridge rectifier) is it possible to power it off DC?

Question by The MadScientist 7 years ago  |  last reply 7 years ago


HOW TO REMOVE FROM SOLID OAK?

I HAVE A N EARLY 1900s  ANTIQUE OAK 3 DOOR  ICE BOX. MY FATHER STAINED IT WITH LINSEED OIL SOME WHERE IN THE EARLY 80s. IT LOOKS A BIT DARK AND DINGEY. I WANT TO REMOVE THE EXISTING FINISH AND BRIGHTEN IT UP. WHAT IS THE BEST WAY TO REMOVE LINSEED OIL?

Question by PAPANATOR 7 years ago  |  last reply 7 years ago


Resonant of Solid stat tesla coil ? Answered

Dear All.. I search on the net some sites to learn how the SSTC work. But my English is no good  I do not understand all as the author says. So please could you help me to know: -Primary and secondary SSTC sides  must be tuned to the same resonant frequency as SGTC ? -Or only the second coil is necessarily tuning? Thank you in advance for your time.

Question by lam 5 years ago  |  last reply 5 years ago


Solid Color Analog LED strip

I just want to make a backlit box with a logo on it. I'm looking for the backlighting to be green. Every single video or tutorial I find on Analog LED strips jumps straight into using a controller or an Arduino. Can I not just use a power supply? Can I use resistors or something of the like to send x amount of power to r, g, or b for the color I want? Is there not just a simple LED strip guide out there?

Question by BillW199 4 months ago  |  last reply 4 months ago


Solid state tesla coil design? Answered

Well, I am planning to build a solid state tesla coil. I've already build a spark gap one, but the amount of control over the output offered by sstcs looks more enticing. I have been looking at many different designs, but I think I want to go with a design based off of Richie Burnett's sstc. http://www.richieburnett.co.uk/sstc01.gif http://www.richieburnett.co.uk/sstc02.gif Those are the schematcs. The first problem I'm running into is that he is running off UK mains, which are double the voltage from the US mains. Will the output of the tesla coil still be good if I am switching ~120v through the primary as opposed to the ~240v in the drawing? Would this mosfet (https://www.onsemi.com/PowerSolutions/product.do?id=MTW32N20EG) work in the power stage, or should i get a higher voltage/lower current mosfet? I also need a substitute for the mosfet in the logic stage. Does it even need to be a mosfet? Could I replace it with a transistor? The regulation circuit also worries me. Doesn't a linear regulator need to be fed a voltage of at least 2 volts higher than the output in order to function correctly? I just realized how many questions I really had about it. Wow. EDIT: I uploaded the pics for the sstc. The first two are the ones that I linked to, the third is Steve Ward's mini sstc. I was deciding between which one to use, but chose Richie's because Steve's has so many ICs and seems to be over-complicated.

Question by duct tape 8 years ago  |  last reply 8 years ago


Exerting pressure with no anchor or flexible to solid.

I am starting a project and have found 2 ways to achieve one part, but I can't find a legitimate way to put it into use. 1) Exerting pressure without an anchor 2) Creating a bendable "spine" which can prevent movement past a point which is subject to change Each comes with it's own problems, the first needs some sort of stable anchor to be able to work, but having an anchor could exert unwanted pressure in other areas. The second one is difficult to find something on, whilst there are ways to do so, I can't seem to figure a way without using electromagnets(which may overheat)

Question by NicholasB5 4 years ago  |  last reply 4 years ago


absolute zero

I just had a thought, at absolute zero does everything turn into a solid? since nothing's moving would it be a solid? Would gases such as helium solidify at low pressures? Etc.

Topic by guyfrom7up 11 years ago  |  last reply 11 years ago


where can i buy a NTP12N50 power transistor? Answered

I am building a solid state tesla coil and i cant find the NTP12N50 or NTP12N40 transistors, does anybody know where i can get some? here is the website i am using to build it http://www.angelfire.com/electronic/cwillis/fetcoil2.html.

Question by Jimmy Proton 8 years ago  |  last reply 8 years ago


Where can I buy solid wood to make a jewellery box? Specifically walnut and cherry

I want to make a jewellery box and have an idea in mind but I need two different colours to pull it off. I want to make it out of walnut and cherry as they are dark and light respecitively and I think could work quite well together. I have literally no idea where to get it from. I need it in roughly 1/2". I live in England, in Essex, but I just need to know what to look for. all I can find is places that do veneered MDF. I'm only going on the assumption that 'those really nice ones' are actually made from solid wood. To be frank, I don't even know exactly what veneered wood is. Can someone help point me in the right direction?

Question by JackIsted 7 years ago  |  last reply 7 years ago


i was on gizmodo the otherday

And saw this kool samsung 256gb solid state drive, its suppost to be the smallest, fastest, and largest space SSD, thats pretty kool, but, $4k is a little steep for me. especially if it costs more than 2 of my new laptops.

Topic by Yerboogieman 10 years ago  |  last reply 10 years ago


SSTC Trouble Shooting?

I am in the prosses of building steve wards Class E SSTC( http://stevehv.4hv.org/classEsstc.htm )and copyed the secondary from here: ( http://www.richieburnett.co.uk/hfsstc.html ), i have it all set out i am am using all the componants he does only mine does not work(not that I expected it to work!). i do not have acsess to a osiliscope nly a multi meter with the Hz function so i can not look at the wave forms it the Gate/ anntenna. Any help would be much appresiated as i have not really worked with tesla coils/ resonance before.

Question by MadScientist101 7 years ago  |  last reply 7 years ago


Nonleathalbychoice style weapons/"props"

Hello to anyone who follows me. Yes I am still alive. Now the reason I am posting this is because I feel like I need to give back to the community I have been using/involved with for years now. Not the craft community but the Knex community here. Many of them have moved on from Knex since starting college and so have I. Mostly do to the lack of space and already messy room. So in order to give back I have come up with a better more interesting method. Instead of using Oblivitus's method of making the Knex guns in a CAD program I will instead be giving you the plans and basic instructions to make weapons/props inspired by Nonleathalbychoice.  This being said unlike the Knex guns these items are going to be less accessible, more difficult, and dangerous. To do these things it will help to have a computer with Solidworks 2014 on it. Later I will post PDFs of the cutting plans in order to reach a wider audience. That being said  some of the projects were  and will be inspired by scrap metal I found and will be costly and wasteful to replicate. However I believe that the raw materials for 4 of the projects came in at under $100 total. So still cheaper than many of the larger Knex guns. Also I probably wont be posting these things as step by step instructions since most of these items are made by just cutting out sheet/bar metal. Any advanced instructions will be noted. The time frame for these instructions is going to be very slow due to college. Expect maybe 1  a month if even that.  I will try to inform you of changes and fixes as soon as they become apparent to me.  Also I am first writing this after only an hour of sleep. So if any of you spot grammatical errors please point them out to me.

Topic by tytiger33 4 years ago


What are the solid materials that dissolve in a liquid substance?

Other than sugar and salt I need 2 examples 

Question by Emma-science 6 years ago  |  last reply 2 years ago


Question from a Solid State Tesla Coil?

I have a PLL SSTC. I use IRFP460 Half-bridge. Can I use other MOSFET?. Or how to choose a MOSFET for SSTC

Question by james34602 6 years ago  |  last reply 6 years ago


How to make corks more solid and hardy? Answered

Hi! I'm trying to create the chess pawns out of corks, i need to carve just a few more of them. But i want to made them more durable. Right now they're tender and fragile (i'm worried that i can break them easily). Is there a way to make them more hardy? like some glue or some kind of paint... I want to keep them rough, without bright or smooth surfaces, but i want them to be harder, what can i do? thanks!! :)

Question by FenriX 5 years ago  |  last reply 5 years ago


can any body build a knex rc 10x10 with full solid axil suspension and all wheels actually moving

Can any body build a knex rc 10x10 with full solid axil suspension and all wheels actually moving if you can then i will show my pics on here and youtube it really is a knew way to use knex?

Question by thesoundbender 7 years ago


Is it possible to convert a solid state amp to a tube amp?

 Is it possible to convert a solid state amp to a tube amp?

Question by adamgillies 9 years ago  |  last reply 8 years ago


Ideas for DIY solid surface kitchen counter top?

Hi all, I need to replace some counter tops in my kitchen and I love the solid surface materials like Corian, but it's also very expensive so I was wondering if we could collaborate and come up with a DIY solution. I know concrete is one option for a DIY counter top. But it's very heavy, prone to cracking and a little to industrial for my taste. Maybe someone who knows more about synthetic resins will have a suggestion. I'm imagining pouring a mixture into an upside down mold the way it's done with concrete. It would be great if we could figure out how to mold a sink into the counter too, but maybe that would add too much complexity.

Topic by SteveGerber 11 years ago  |  last reply 6 years ago


How to compress air into a hollow solid without a valve?

Hi  Really need some help with this one, have searched everywhere but cant seem to figure it out. I know there is probably a very easy solution i'm missing so please help. Basically I want to compress CO2 at around 80 psi into a hollow metal. I have drilled a micro hole and created an opening (about 2mm radius) into the metal. My problem is after I compress the CO2 in there how do I remove the compressor nozzle and seal the hole without the CO2 escaping.  The metal is small and there is no place for a valve. Is there such a thing as a self sealing removable valve? Or could I use a valve  with two openings and pump liquid metal (that would than solidify) and seal the hole so I can remove the compressor?

Question by cnaidoo 7 years ago  |  last reply 7 years ago


can you change the camera view on metal gear solid peace walker for psp?

I downloaded the demo but the camera is like behind "snake". i wanted to know if i could change it to be more like call of duty, metal of honor, etc... 

Question by GianniMora 8 years ago  |  last reply 8 years ago


How can i make a solid rocket engine at home?

Question by J_o_h_n 4 years ago  |  last reply 4 years ago


flame

What is flame? Is it gas ,solid or liquid?it can't be solid or liquid but it isn't realy gas eather... or is it?

Topic by toogood 11 years ago  |  last reply 11 years ago


how can i hook a keyboard to a solid state tesla coil?

I want to build a solid state tesla coil and hook a keyboard up to it. how can i do this?

Question by rebel01 9 years ago  |  last reply 9 years ago


westinhouse flat sreen has solid green light but a black screen how can i fix this?

Null

Question by 9 years ago  |  last reply 9 years ago


Solid plastic like material that dissolves in water after a week?

I am looking for a material that is hard like delrin or solid plastic, about 2-3mm thick.  It should stay rigid / stiff for a week, then it should slowly dissolve and disappear.  Does something like this exist? 

Question by henrik242 3 years ago  |  last reply 3 years ago


anyone have an idea for a good knex solid axle suspension?

K so i have ideas for everything else, can someone come up with a good solid axle suspension for a rock crawler out of knex, i also came up with a torsion bar ifs set up...if you can make a SMALL cv shaft i could make 4wd steering and indipendant as well, but for now i want solid axle! lol i just want to see how many ppl can do all this, steering idea would be good too!

Question by aaronj 9 years ago  |  last reply 7 years ago


Metal Gear Solid 4 Has 90-Minute Cutscenes

Kotaku: MGS4 Has 90-Minute CutscenesWTF?Hey Kojima, this is a game, not some crap anime show or movie. Tell the characters to shut up already. Jeez.Super long cutscenes...they remind me why I don't buy Japanese games anymore. And that reminds me why I don't buy Japanese consoles anymore.

Topic by Aeshir 10 years ago  |  last reply 6 years ago