Propellant Type

Would making lifting powder packing it in ur engine tube and then letting it dry produce more or less thrust than black powder? Also everyody says dont use pvc for engine tubes and this baffles me because ive always use it and ive never had a problem infact ive found it to work better i always seem to split cardboard could sombody explain to me why i shouldn't use pvc? And third what is a good way of getting two or more engines to fire at the same time as i have a 7.5 foot rocket that i don't feel like packing an engine the size of a bottle for again.

Topic by buildingteen   |  last reply


Propeller name problem?

I'm looking for a small (2 inch) propeller for a toy, but all the sizings are like 4x6, or 6x8 etc. What do these 2 numbers mean. Also some propellers say EP-____ what does this mean and finally most say 120mm x 110mm, (example) but no way do these mean that the propellers are almost square. Thank you

Question by alexw2150 


whirligig propeller hub ?

I have started to try my hand at making whirligigs, but always run into problems when making the hubs for the propellers. Does anyone have any ideas? I had a pdf file on how to make a jig for them. but I do not have a table saw.

Question by tomthebutcher   |  last reply


Magnetically Propelled Bicycle

I was told that I should make a forum topic out of this. So here it is:Here is a link to my upublished instructable:Magnetically Propelled BicycleI came up with this two weeks ago while I was day dreaming about levitation and magnets.The idea is that one stationary magnet set up on the middle of a bicycle negative facing front, can push two magnets bolted together, each facing negative, with an axle running through them and wheels on opposite sides. So when the stationary magnet'ss power is increased, the two magnets in front will be pushed, thus rotating the axle where the wheels are attached, adn obviously the wheels are turned.I say "when the power is increased" because hopefully an electro magnet can be used. I am not sure, but I think an electromagnet can be hooked up to a car battery, and then with some control device, more electricity can be sent to the magnet, possibly increasing the power ( I don't know much about this stuff so help me out here.Look at the schematics for all of the anatomy.I have not figured the turning system out completely, in the intro picture you may see that the turning wheel is connected to the rear by a bar ( In the way I believe it may work there will be two bars side by side, I can't really explain it yet). That is how I plan the turning to the controlled.If you have any ideas for this project, add a comment. I have not made this yet and am still creating it.Please, do not steal my idea, I am only 14 and just started inventing. I have no idea how the patenting system works and I do not have the money for it.I would also like to know more about electromagnets, how they work and where to buy them. I saw one site where the best electromagnet can "pull" like 1300 pounds, so this thing should go pretty fast if it is built properly. I reallly want to know if it is possible for electromagnets to push, that is the whole Idea for this. But if they can't, I've already drawn a simple schematic for pulling the wheels which is on the next page.I also want to add that the stationary magnet cannot be level with the rotating magnets, it will have to be a little above, and if you add a mechanism where the stationary magnet can move up and down, you can control the bike forwards and backwards.Hopefully, no one has a patent on this ( I've searched and haven't found one). And hopefully this will replace fossil fuel vehicles, although I doubt the government will allow that. THE WHEELS/ROTATING MAGNET IS NOT ATTACHED TO THE BICYCLE. IT IS ONLY CONNECTED BY AN AXLE RUNNING THROUGH IT. JUST LIKE A BICYCLE OR A CAR. Here is a link to what I was sorta thinking:Here Just turn it horizontally and add wheels to the ends. The gyro- thingy is like the rotating magnet and the base is like the stationary magnet.

Topic by Alphaviking   |  last reply


can ducted propeller produce twice lift compared to opened propeller ?

Can ducted propeller produce twice lift compared to opened propeller ? for example if there is an opened propeller with low rpm producing some amount of lift. If we ducted that opened propeller and provide same rpm and power as opened propeller to it will it produce twice lift compared to opened propeller with same rpm and power ?

Question by MuhammadK19   |  last reply


where is the the step by step project for the woodbuilt propeller?? Answered

HELLO,I saw a project here at insructables that showed you step by step how the wooden prop was made with metal templates that I would imagine was in the downloadable pdf file which I could not access.Can anyone tell me how to get it.PLEASE REPLY.THANK YOU 

Question by edmundston   |  last reply


adding flat screen to propeller

I want to build a propeller mini and attach it to a SMALL flat screen and do a permanent and dedicated home security. Is there a way to do that? thanks everybody especially you geeks.

Topic by zhotrum   |  last reply


Need some understanding of propeller design?

I need some help in understanding the science behind aqua propeller designs.  For example what is the difference between modern outboard motor propeller vs. what they used in steam boats.  To me the steam boat design looks pretty good.  After all it displaces more water.   I would appreciate the help.

Question by kabira   |  last reply


Is there a specific twist to airplane (rc) propellers?If so, can I make one at home?

I am working on creating an rc plane but cannot figure out how to find the correct propeller size. Is there a company that sells these?

Question by    |  last reply


I make knex boats, but all of them are paddle boats.I want to make a Propeller boat but cant make a working one. HELP!? Answered

Please can someone help me make a propeller for my boats! I, ideally, want a just prop system, but dont mind a paddle (padd) and prop system. The motors used have to be one of the following: A grey, large, two direction two speed (4x AA), x2 max A blue two direction (2xAA) x2 max A Spring motor (No Batteries) x2 max. I also have a gearbox (90 degree Direction change, not speed change). PLEASE HELP!! I can use all of these motors together if neccisary. Thanks!!

Question by hedzup456   |  last reply


Gadget Gangster Propeller Platform

The Propeller Platform Module (pictured below) includes an 80Mhz, 160 MIPS Parallax Propeller microcontroller, 32kb of EEPROM with space for a second EEPROM, 5V and 3.3V Voltage Regulators and the pin sockets to add additional Gadget Gangster Platform modules like the LCD UI Module or the Prototyper Module.All Gadget Gangster Platform Modules utilize .1" pin spacing and are breadboard compatible. Here's a little video demonstration of the LCD UI and Propeller Modules: What is the Gadget Gangster Platform?The Gadget Gangster Platform is a lot like the Arduino with a few improvements on the basic idea;-Modules (a.k.a. shields) can be connected to each other on top and bottom. For example, you might have a Propeller module in the middle, an LCD UI on the top, and a prototyper on the bottom. We've got a few initial modules to start, and we'll continue to expand on the selection with more modules and microcontrollers.-Pin spacing is .1". This makes the Platform compatible with breadboards, and it lets you use Platform modules in combination with other project boards.-The board footprint is 3.8" x 2.5", which is the same footprint as ExpressPCB's MiniBoard service. This makes it easier to add your own custom module.-Because they're featured in Jon Williams' Spin Zone column in Nuts and Volts, they're well documented. The Propeller Platform Module will be the basis for many of projects described in his upcoming columns and the LCD UI module will featured in his September '09 column. -Platform Modules are licensed under the MIT license (essentially public domain), giving you the flexibility to use the design in commercial products or anything else without restriction.[/list]I'm super-excited about these new project boards. There's more info on Gadget Gangster but if you have any questions, you can just reply to this thread.

Topic by Gadget Gangster   |  last reply


Motor/propeller selection for quadcopter

Hello Instructables! We are a team of engineering students that want to get started in the world of multirotors. Our objective is to build a long endurance/high payload quadcopter for industrial applications, and we plan to innovate in the power system area. So, without further ado here's our first problem. I've searched the internet for a while now and I've struggled to find information on how to choose an appropiate motor-propeller combination. I know the total maximun thrust should be a bit more than two times the the total weight but motor and propeller manufacturers rarely list the "thrust per rpm" of their props. Our initial estimation for the quadcopter's total weight is 3,3 kg. considering 200 g for each motor. I did manage to find this static thrust calculator but I have no idea how reliable it is since it doesn't say how the thrust is calculated. (http://personal.osi.hu/fuzesisz/strc_eng/index.htm) So that's about it. Any help would be greatly apreciated, no matter how small. It can be advice, information sources, or even builds that are similar to what we want to make and have already been tested. Thank you very much for your time! PS: Excuse me if my english sounds a bit weird, it just isn't my native language.

Topic by Joakov   |  last reply


Green spud gun propellants?

In terms of spud guns, I'm assuming that the standard propellants aren't quite "green". Does anyone know of another way of doing it?Or is it innately eco unfriendly?

Question by SenaCat   |  last reply


Quadcopter Motor Type? Answered

Hi, I'm working on building a quadcopter.  I have everything figured out, but I'm wonder what motors (and where) I should get.  I would also like that motor to have a propeller mounted on it.  I have seen many Instructables for quadcopters, but none of them specify the motors/propellers.  If you could answer this, please do!  Thanks.

Question by Fission Chips   |  last reply


um, hi, what should i do with this?

Ok, so, i just made a plastic bottle 4-fin propeller and used a pencil for its axle, but i want to make a tiny boat with it, and i don know how! i need to figure out how to make, the body of the boat, the wind-up mechanism, and i need to know what materials i should use and how to waterproof it. any suggestions r welcome. Thankz!

Topic by the_TRUE_LINK_OWNZ!   |  last reply


Project Euphoria~~The first (that i am aware of) Propeller Driven Knex Boat.

Well, I just thought I would let you guys know about Project Euphoria. It is the first, that I am aware of, knex propeller driven boat-If there is one, please please PLEASE, correct me. I hate making False claims. It is a grey trekker motor, driving two counter-rotating two-bladed screw propellers. Thanks to everyone who posted on This topic, and the many Knexer's who have wished me luck, if only in thier heads (If you were one of these, thank. but next time put a comment on?) I will have pictures, maybe a ideo, and possible an Instructible soon. Hedz

Topic by hedzup456   |  last reply


Quadropropellor concept

Last night I had this dream about a bizarre helicopter that used a simple but unique form of a propeller.  Conceptually, I see no reason why it should not work... but I'm not sure if it would be any better or more efficient than a typical propeller.  The idea is that the geared propellers rotate at the tips of the main rotor as it spins.  The outside ring is fixed such that as the central propeller spins, each of the out side disc spin creating lift from both the central propeller as well as each of the four outside propellers.  Because the geared wheels will spin faster than the central rotor, theoretically it might produce more lift than a single propeller (maybe).  I would like to hear other people's thoughts on the concept.  If someone has a 3D printer, it should be relatively simple to make and test.

Topic by DarkRubyMoon   |  last reply


how to make electric r/c boat?

I want to make a boat for school with an electric powered battery motor with a switch, which can drive a propeller in the water. it must be water proofe but if it cant anything as close as possible.

Question by    |  last reply


How to let something spin in water without moving ? Answered

Ok, first ill explain what I have built, and excuse me if it already exists, I can't even think of how to google/name it. A can floats in water, there is a candle in the can. On top of the can there is a propeller which is stuck to the can. The hot air rises and lets the fan (and therefore the whole can) spin. The power is very little and the can tends to move to a side of the bowl and that friction stops it. Is there a balance problem ? Is the not perfect propeller working like a sail and therefore pushing it to the side ? What could I do to let the can stay perfectly in the middle while spinning ? Thanks in advance.

Question by DaanV1   |  last reply



Estes Model Rocket Motor Propellant Type? Answered

What is the propellant in an Estes rocket motor?  Also at what ratio are the ingredients in the propellant.  Any help is appreciated.

Question by electronicz   |  last reply


small solar panel, motor and propeller

I have constructed a desktop solar helicopter that I have on wire3d.com  I am trying to make a small very light solar helicopter that I can fly on the desktop and is tethered on 4 corners. I will make it out of very light plastic or styrofoam or bulsa wood. I need to find the right panel, motor, and propeller. Any suggestions will be appreciated.   bob

Topic by solartoys   |  last reply


I have a scotts self propelled lawn mower and i need to adjust the belt for the self propelled portion?

Looking for help on how to adjust of the belt for the self propelled portion on my Scotts lawnmower.

Question by    |  last reply


What are some things that you can do with a Propeller that you can't do with an Arduino or other microcontroller?

Just wondering what kind of stuff the instructables users can come up with.

Question by beak90   |  last reply



Turbine Jet engine...? Answered

If the intake turbines' speed is regulated by the compressed exhaust over the rear turbines, would it be more effecent to have 2 props in a row, or a single large one at the rear of the engine to control the rotation speed?

Question by shawneegeek   |  last reply


How much cfm psi in a can of propellant?

I want to sandblast/etch an image onto acrylic. so i was wondering how close do the specs of canned air get to an actual sandblaster. Ive searched and couldnt find this anywhere. How much cfm and psi is there in a can of propellant. Can anyone help me with this?

Topic by bsmith102   |  last reply


Can two electric trolling motors with different propellers and maximum RPMs be used effectively on the same boat? Answered

I am building a solar powered electric boat. I want to use more than one motor on the transom. I was wondering if using two motors with different maximum RPM, power, and propeller shapes was possible? Would the propeller of the less powerful motor just add drag or would it add power? Obviously this isn't very specific, but I'm really looking for an explanation or proof of concept. Thanks very much in advance community!

Question by DELETED_craz meanman   |  last reply


could anyone recommend a steam engine? Answered

I saw crazybuilders instructable on making a propeller driven skateboard, and that inspired me to make a prop driven gocart. I have also recently become interested in steampunk and I thought it would be awesome to use a small steam engine to power it. This is where it gets difficult. Could anyone recommend a steam engine powerful enough to drive two propellers fast enough to move me? (I weigh about 50 kilos)

Question by scarabeetle101   |  last reply


Propelling a Ping Pong Ball 17 feet

We are doing a project where we have to consistently shoot a ping pong ball 17 feet into a pail. Any suggestions or ideas?

Topic by dylanwil   |  last reply


How to make a magnetically powered/propelled vehicle ?

I'm a freshman in high school doing a Year End Project (YEP) for STEM. My project is a vehicle that is propelled by electromagnetism. I have three main idea's already. Option 1: Completely replace wheels with large magnets with either a North or South charge. Then replace normal roads with railings charged with magnetism of the same polar to the cars. The bumpers could be magnetically charged as well. With all car bumpers being the same polar, it would decrease the chances of accidents. Take into account that this idea has only started growing for the past 2 years so my ideas for the mechanics are not close to completion so I'm leaving those thoughts out. Option 2: keep the wheels but modify them to have 2-3 smaller magnets on the inside of the wheel. By turning and switching on different a polar changing direction between forwards and backwards. Then add the same idea with the bumpers for the same reason. This cuts the cost exponentially. Option 3: Keep the wheels and everything else of a normal automobile except the engine. Replace it with on large magnet that's stationary and a smaller magnet that can rotate or switch between North and South polar's. Possibly instead of only one pair of magnets increase to an unknown number to allow for more speed, braking and acceleration power. Still keep with the bumper idea. I can't seem to find a reason other than cost to get rid of it. Of course the magnets would interfere with electronics. I haven't thought of a solution for that problem as of yet.

Question by 085070   |  last reply


Recommendations on propellers/controller for over 100g body.

Hello everyone,I am currently trying to build a DIY drone. I have never involved myself in any sort of creating drones. My current project is about making a drone with a morphing body we created. Previously, we just purchased a pre-made drone and took apart all the necessary components and re-attached all onto the morphing body. But the drone we used is this model : Holy Stone HS170 Predator Mini RC Helicopter Drone 2.4Ghz 6-Axis Gyro 4 Channels Quadcopter Good Choice for Drone TrainingThis product can make things fly when the weight is over 30~50g. Would you be able to recommend some products or any sources that can be useful for building a DIY drone? Thank you!

Topic by melonmelon11   |  last reply


HOW TO PRODUCE MORE THRUST IN A REMOTE CONTROLLED QUADCOPTER ? 1]LONG PROPELLERS LESS RPM or 2]SMALL PROPELLERS MORE RPM

I ALSO NEED ANY RELATIONAL FORMULA  BETWEEN  LENGTH OF THE PROPELLERS , WIDTH  OF THE PROPELLERS , RPM (rotation per minute) AND THE THRUST PRODUCED . ANY OTHER DETAIL ABOUT QUAD COPTER ( or any other flying vehicles ) CAN ALSO BE STATED.     THANK YOU!!!!!!!! 

Question by RAGHUL NM   |  last reply


How many analog outputs does the Parallax Spin Stamp have? Answered

I have been looking forward to getting a microcontroller with analog outputs, but I need to choose whether I should get the Spin Stamp instead of a bulky Propeller board.

Question by VirtualBoxer   |  last reply


What would be a good material for creating a custom vertically oriented wind turbine blades?

For a school project my group an I are building a vertically oriented wind turbine  similar in orientation to the one in the link(http://www.youtube.com/watch?v=rLa_NY5U1nk) We would like to build a few different designs to test which will give us the best efficiency as we will do using it to generate maximum output voltage. I'm wondering, what would be a good way to create these different custom pieces, especially the curved airfoil shapes we may wish to utilize in the design? Thanks!

Question by ddrocketman   |  last reply


Surface tension propels tiny boat without sails or moving parts

From the New Scientist:WATCHING Sung Kwon Cho's model boat glide silently across the still water with no propellers or sails, you'd be forgiven for thinking a phantom hand was drawing the vessel forward. The boat is actually being driven by water surface tension, the same force that allows some insects to skate across the surface of a pond.The design is inspired by Pyrrhalta beetle larvae, which also use surface tension to propel themselves. Since it requires no moving parts, the method should be more robust than those involving propellers and may use just a hundredth of the power.Another story on the NetworkWorld site (with a few skeptical comments.)Doesn't look too difficult to replicate, does it?

Topic by gmoon   |  last reply


How big a propeller would I need to turn a 3500 watt AC gererator?

A friend of mine gave me a 3500 watt gasoline AC generator because he burnt the engine and he did not want to fix it due to cost. I want to use a propeller instead of a gas engine to make it operational. Is this practical? The wind here blows constantly between 20 and 30 mph.

Question by dukexyz   |  last reply


how do I propel a hover craft go kart thing

I am in the proses of bilding a hover craft andI want to know how to go forwerd

Question by book54321   |  last reply


Would different angles on blades of propeller reduce Speed? Answered

The goal is to reduce speed of my Egg drop contraption but still spinning to keep it accurate.? Basicly its this. 8 blades on a octagon frame then String and then my shock absorbing egg carrier. What way would I want to set my Blades so that it doesn't speed through the air?

Question by noobiefied   |  last reply


Rubber band aeroplane is not flying correctly

Created Rubberband aeroplane ,and glides fine without propeller.But when the propeller is turned ON ,it just lost the balance and its not climbing into height.The propeller is home made.what would be the reason?.please help me.

Question by AnasCS   |  last reply


wind generator ?

Has anyone had experience in using magnets to help propel a horizontal wind mill or vertical wind turbine .what I mean is putting them in a circular series where the north propel against the north creating , forcing or helping the windmill to move in a circular motion?

Question by junkyardenergy   |  last reply


The Ultimate Water-Powered Rocket!

NASA and the Air Force Office of Scientific Research (AFOSR) have launched a water-powered rocket 1300 feet into the atmosphere!The rocket was actually propelled by a frozen mixture of "nanoscale aluminium" (isn't that "dust"?) and water, pumped in at the consistency of toothpaste and then frozen in place. The propellant is known as ALICE (aluminium and ice - convenient, eh?)Earlier this month, the collaborative team, Drs. Steven F. Son and Tim Pourpoint of Purdue, Rich Yetter and Grant Risha of Penn State, Vigor Yang of Georgia Tech, Harold Bell and Frank Bauer of NASA, and Mitat Birkan and Thomas Russell of AFOSR watched as the rocket soared high into the sky, to 1300 feet near Purdue University.ALICE is generating excitement among the researchers because it has the potential to replace some liquid or solid propellants. It is a promising propellant energetically. Theoretically, when it is optimized, it could have a higher performance than a conventional propellant. In addition, because of the abundance and easy handling of the raw materials, ALICE could potentially become the propellant of choice for missions leaving other planets, since it could be (relatively) easy to manufacture from local raw materials and far easier to store than cryogenic fuels. Story from Wright-Patterson Air Force Base via Rocket Dungeon.Video found by Jeff-O

Topic by Kiteman   |  last reply


KNEX Airplane

This is a robotic airplane. The propellers speed up or slow down as the buttons are pressed.

Topic by ftking_83702   |  last reply


Programming?

Does anybody else on this website know how to program in SPIN? Haven't seen much Propeller programming on this website...

Question by blinkyblinky   |  last reply


Need some input on boat propulsion

Can someone help me out with some ballpark calculation of propulsion power needed to move a boat? I do have some specific questions: 1. Propeller vs. Jet: Which one will deliver more propulsion given the same amount of power. 2. If it is typical electrical trolling motor type propeller, is there some simple formula to represent relationship of boat speed, power needed (hp), propeller rotation speed, and diameter of the propeller? 3. If it is a jet: Is there a simple formula to represent relationship of boat speed, power needed (hp), boat speed, and GPF of water to move the boat. I know that I am missing a few variables here like boat's weight and its water displacement.  I am trying to keep it simple. Any thoughts and input will be highly appreciated. Thanks.

Topic by kabira   |  last reply


anyone know how to make a self propelled "toy car" with out batteries or motors because i need it for tech class? Answered

I need this info for a tech class one day project we're build and raceing cars out of a set amount of materials and it needs to be self proppelling also anything on making it aerodynamic would be appreciated.

Question by cryptex   |  last reply


Experiment on whether and when a stuck up fan will break into flame.

Let us consider a typical home electric fan, and we put some obstacle to prevent the fan propeller from turning, then we switch on the fan on the fastest speed; will the fan and when eventually break into flame because the propeller cannot rotate? Have there been experiments to see what will happen? Marius de Jess

Question by Marius de Jess   |  last reply


How to build a super-thrust blower out of electric blowers to drive a paraglider ?

I want to build a paramotor which is electric and not propeller driven. Therefore, I want 'hand dryer' type blowing technology to provide sufficient thrust. Does anyone know if large super blowers are available in portable electric form ? Could this work ? How much thrust does the propeller create ?

Question by gregsmithsays   |  last reply



Lockheed Hybrid Blimp

Looks like it gets some lift from forward motion, some from propellers, and some from buoyancy.

Topic by ewilhelm   |  last reply