Search for lb in Topics


leg and arm weights

Will someone write up the plans for a HEAVY-DUTY ankle and wrist weight. I have been searching online for a company that will make custom weighted wrist and ankle weights but there aren't any. I'm wanting to make a 50 lb for the arms and 100 lb for the legs. I'm thinking along the lines of several iron or lead bars strapped together with a nylon fiber or other strong material. I've only ever done projects in high-school, where materials were provided, so I don't really know where to get the materials needed. Please help.

Topic by dhill16    |  last reply


hp/lb ratio 20:1

Is this not a most elegant powerplant?http://www.angellabsllc.com/index.htmlthoughts, please.

Topic by unclejoe    |  last reply


Can paracord hold a 103 lbs boy

 im 103 lbs. and i want to know if some really thin paracord can support my weight!!                       -M

Topic by GianniMora    |  last reply


500 Lb Thrust small jet engine? Answered

So the fun and crazy side of me has come out again and I have thought up some crazy plans for a jet powered wing suit.  I'm sure many of you have seen the swedish rocket man, he jumps out of planes with a small wing and 4 miniature jets strapped to his back.  That is cool and all, but I would like to look at building something a little more useful than fun, although I could imagine it would be a blast.  The idea is to design a large wing 8-12 feet.  It will be made extremely light, however extremely strong because the wing should be able to handle strong g-forces, tight turns along with possible above mach speeds (probably pushing the boundaries of sanity.  This will probably require a carbon fiber and aluminum structure while requiring a rigid wing surface as apposed to the lighter plasticy flexible covering used by smaller aircraft.  This wing will be able to take off and land, eliminating the requirement of a plane to haul it up and then also not necessarily requiring a parachute (one will be worn at all times)  The wing I imagine will not be any lower that hip height and will also have a v-tail for more control.  Now my question is if anyone knows of a small jet engine that exists and would fit this project,  It would also be possible to fit two, one on the underside of each side.  I am looking for 500 to 1000 lbs of thrust and they need to be very small, and lightweight.  Do any engines of this type exist.  I also may be out of my mind expecting to take off with that amount of thrust,  I just don't imagine the whole thing to weigh more than 200 lbs plus me weighing just under 200 lbs.  So 500 would ideally allow for vertical take off, however it would probably not be practical.  Would an engine with this amount of thrust be suitable for my needs or would I need 1000 to 1500 lbs of thrust.  One big goal is for the wing to be very efficient so I don't want to be wasting fuel, however it would be nice to be able to fly quickly for some local entertainment.  Maybe I would throw on some solar panels for the electronics as well. EDIT....... I found this http://jetbeetle.com/JB_body_products.htm This engine seems pretty substantial, would one or two of these be capable of doing what is needed here?

Question by jj.inc    |  last reply


Huge knex lot. 30 lbs. appraise?

Aight, so im back. for a short period of time, that is.   I've realized that over the past few months i haven't touched my knex. Its become a childish past obsession to me. So, yeah, i've decided to sell the knex. Its 30 pounds of good pieces. Not the crappy pieces that no one uses. All the good stuff. Im talkin 250+ yellow 5ways. 1000+ green rods. Every piece imaginable. This was enough to make the Knexsayer, the tr18, and some oodaammo pistol at the same time. I've had a good time here, but , time to move on. So, how much for it? i was hoping to get above 150. i'll probably put it on ebay....

Topic by lioneatr    |  last reply



Grow 100 lbs of potatoes in 4 square feet

Learn how to grow 100 lbs. of potatoes* in a tiny plot with some lumber, potato seeds, and some careful watering. When I move into a new place where I can finally put my garden this is one idea I'd love to try out and see if it works.And then I will be the Spud King of my neighborhood, giving potatoes to all the kids for Halloween because that's a lot more than I normally eat. Link via Lifehacker*45 kg in .37 square meters for everyone else

Topic by fungus amungus    |  last reply


Sensor to eventually measure weight ( up to 250 lbs)

Hi everyone, I am stuck trying to find a method or sensor to do what I want. Basically, I am trying to make a cheap flat weight scale- light weight and portable; thinner than using load cell sensors. I was hoping for a flat compression fabric or piezo resistive pressure sensor, but have not found what I was looking for. Does something like this exist?

Topic by appl314    |  last reply


Square water melon

How should I know to create the correct dimension of the case for a 7 (16 lbs), 8 (18 lbs) and 9 (20 lbs) Kgs of watermelon? In the instructables didn't mention the dimensions for each watermelon. Could you please send me your comments? Thanks

Question by Lolius    |  last reply


need to make a switch for my 2,000 lb superwinch 12 v. mine went missing with all the wires ?

thats about it. there are two terminals coming out of the end of the motor.

Question by artdickenson    |  last reply


fiber reinforced concrete $$$

Online i can see that a 60 lb bag from quickcrete is about $5. ok. easy.   Shipping----$20 to----$50----- ouch. so .   where to find it?      gotta be someplace that has 1000s of lbs of it on the shelf, and sells it at 5 or 10 bucks.

Topic by Toga_Dan    |  last reply


I need to make a carrier/sling to carry my 15 lb. Westie?

I like to hike but my Westie's short legs tire out after a while. It kills my back to just carry her for any length of time. thanks

Question by bakkl    |  last reply


How can I rig a cabled pulley system for a homemade weight machine?

That gives both variable resistance through range of motion (lighter at start, full weight at end) AND force multiplying where e.g. 20 lbs becomes 80 lbs (added weight effect with less plates).

Question by vwchest    |  last reply


Cystic Fibrosis patient needs an inexpensive respirator generator

My daughter with cystic fibrosis, uses a "bio vest system" that includes the vest with hoses that attach to a generator which weighs about 50 lbs. Hillrom makes a 17 lb vest system (www.thevest.com) but it costs $16,000.00. I don't understand why it has to cost so much. We can't afford the 17 lb version. My daughter who has just graduated from college and wants to travel in her career is faced with not taking her vest along with her for weeks at a time because she can't handle carrying the heavier version on and off planes, trains, etc. This leaves her without getting her breathing treatments. Is there a solution to this problem? Can the bio-vest be made any cheaper so that everyone can have the 17 lb version??

Topic by teachermom    |  last reply


I want coal!

I'm a blacksmith in training and i need some coal, i want some, i don't need it but it would help a ton. my father keeps saying that i can get 1000 lbs of coal for $100 but so far, it's all 50 lb bags for $20 on http://www.centaurforge.com, some 12 lbs for $20 on some remote website somewhere someplace in some far recess of the pixelated world of the internet!!!  ... i don't mind paying $200 for 1000 lbs, or even a bit more but the problem is, is that i'm in Florida right now. so, i don't know how to get coal cheaper than a buck a pound. right now i'm using lump charcoal and it works fine. but coal gets the metal a bit hotter. so what do i do.

Question by Blacksmith_by_tradition    |  last reply


Have a 20 lb ABC fire extinguisher that I cannot get refilled / hydroed, made in 1980, Why?

Have a 20 lb Ansul Sentry ABC fire extinguisher.   I recently took it in to be hydroed/refilled but the refilling company would not perform this for me.  The extinguisher is in great shape and there is no visible damage or rust. This fire extinguisher was made in 1980 and Apparently they said that they would not refill or rehydro your product if it was made before 1984 or so.  Why did they tell me this and can I get it refilled somewhere legally?

Question by baudeagle    |  last reply


Math Problem

I need a formula to answer a question such as this: If a 7 feet 300 lb man can have 24 beers before becoming intoxicated, how many beers can a 5 feet 100 lb man consume before becoming intoxicated. Or direct me to a site where I might have this answered. Thanks in advance.

Topic by Sovereignty    |  last reply


Forza Motorsport 2 Mods! (UNCOMMON MOD HERE!)

Post all your Forza Motorsport 2 mods here! How to do my mod is a secret. Some of my car's specs: HP: 623,529 Torque: 614,934 ft-lbs Top Speed: 435453 MPH Downforce: 3455 lbs Boost Pressure: 432.87 PSI

Topic by Tom1795xx  


Eng sys to power a machine 7 ft lbs of torque for 900 rpm (constant load need) 24volt dc mtr have specs w/ gear red 2-1? Answered

Crushing grain etc, have the model number for the motor, need solar power to run 62.5 full load amps.  - have more info if needed

Question by samhall    |  last reply


Is the torque that an electric motor provides the same that is required to turn it when not powered?

A 30 hp electric motor provides 158 ft-lbs of torque when rotating at a rate of 1000 rpm. Does the same electric motor require 158 ft-lbs to be cranked at the same speed? Think of it as using any electric motor as an electric generator like in a windmill.

Question by kakashibatosi    |  last reply


Making a large shipping scale?

I'm wanting to build a large shipping scale with capabilities of measuring up to 2400 lb's.  I'm curious if anyone has done anything like this and could give me advice.  I was thinking of combining 6-400 lb. scales with an arduino and simply displaying the sum of their weights on an LCD screen.  Do you think this would work?

Question by Spaceman Spiff    |  last reply



What is the best way to move a 170 lb. television off of a four foot high shelf it is sitting on?

We have a big Sony Trinitron that is sitting above the fire place in a recessed area that is about four feet off of the floor.  The TV is 42" screen and is extremely front end heavy.  I know that we could always just push it off and let it crash, but we'd like to keep it if possible. 

Question by russ and the pups    |  last reply


Two 6 in vs. four 4 in hinges? Answered

I’m working on a project, part of which connects two door-type panels to each other using hinges. The weight of the panels—even together—likely don’t add up to 176 lb, but I’m using double-acting hinges, the models of which are available only as follows: a) 2 pk of 6 in. hinges (total weight up to 176 lb) b) 4 pk of 4 in. hinges (total weight up to 176 lb) What are the benefits and downsides to using more [smaller] vs. fewer [larger] hinges? What would you recommend, AND WHY? Please only reply if you have a reason/backing for your opinion; I’m looking for facts and legitimate reasoning, not merely personal preferences. Thanks!!

Question by macgyverunigrad    |  last reply



How to make Balloon Beach Tires

Has anyone made Sand tires for soft sand .. to move boat to the water ? .. weight capacity =500 lbs.

Topic by ~Frog~    |  last reply


how can i loose weight with out changing my diet? Answered

Im not to happy with my weight right now im near 170 lbs and i want to loose weight with out deits or wasting my cash on prodects will working out or going to a jym help?

Question by knexsuperbuilderfreak    |  last reply


How to make a blimp that will lift 1 pound and weights a max of 5 pounds?

Please I need help Being controlled in yaw, altitude (less than 500ft agl), airspeed (less than 5kts), and basic position in space Rapid deployment  Multi-sensor equipping  eg. compact digital camera, weather sensors, etc Max gross weight less than 5 lbs  Lifting a nominal payload (1.5 lb)

Question by denihso    |  last reply


Need a Motor for ASTM testing: 1-5 RPM, ~150 lb in of torque. Any ideas?

I need a motor with low speed and high torque as described above. Thinking about using a 12V power supply but I'm flexible there. I've tried gear motors but I can't find any with the characteristics I need. The application: motor needs to turn a screw that is fixed until the screw fails. After I have the motor I need I'm gonna have to find some way to graph the torque vs. speed curve. Can't spend a fortune but willing to spend up to $100 because it's time critical. Summary: Needed RPM: 1-5 RPM Torque: 150 lb in Cost <=$100 Thank you so much for any suggestions!

Question by nkay3    |  last reply


Propane expension

Does anyone know of an extension for a 1 lb propane tank that features a hose that ends in a pencil torch nozzle for more agile, fine work?

Topic by Plutosson  


material(wire,rope.ribbon) with tensile strength 20 lbs in air but no strength in liquid water. Answered

Something strong in air (tensile) but nothing when submerged in water. thanks mark

Question by markbonsignor    |  last reply



how to build a tower with 40 craft sticks and Elmer's glue

Must stand 10" tall, support 25 lbs, and have center of 4" diameter

Question by barineau    |  last reply


Does anyone know how much weight can 1&quot; OD PVC pipe can handle? Thank you in advance.

Im thinking of making a canoe and kayak stand out of PVC. The stand would look like a modifyed 'H' with the top span enclosed as well. The cross memebers would be approx. 36" long. The weight of the canoe is around 75 lbs. and the kayak weighs 47 lbs. All of the weight will be distributed over 3 H frames spanning 8'.

Question by Ginger Magnus    |  last reply


My knex are on ebay

Ya the title explains it there on ebay link:  http://cgi.ebay.com/KNEX-OVER-30-LBS-/170619690138?pt=LH_DefaultDomain_0&hash;=item27b9b9dc9a Please buy them im in desperate need of money

Topic by silentassasin21    |  last reply


Something that has been annoying me about my fellow Americans

Are they stupid, lazy or both? I ask this because I've seen repeated references, both online and in traditional media, saying that Hormel is experiencing a boost in sales as "money conscious" consumers buy more Spam. Now I am a Spam aficionado, and I can tell you that I have never seen it for sale for less than $2.39 a can, that works out to $3.18 a pound, for a food that is 25% saturated fat. So what other meats can I buy for less than $3.18 a pound? I looked at the circular for Publix, not the cheapest grocer by far, and whole chickens are $.79 a Lb, Bottom Round Roast $2.19 a Lb, Pork Cutlets $2.99 a Lb. And I bought ground beef for $2.52 a Lb. So, really, what kind of moron is being "money conscious" by buying the MORE expensive food? Are we really that BAD at basic math, the mortgage crisis would suggest so. Now I fully expect some apologist to say "It's convenient, people don't have time to cook", but according to Nielsen's we have time to each watch on average 4 hours of TV a day. And really don't you still have to prepare spam, or are people just plopping it on a plate, garnishing with parsley and serving?

Topic by Tool Using Animal    |  last reply


A source for a small Diesel engine?

I'm doing a science fair project about algae biofuels, and was looking for a small, tabletop, less then 70 lb diesel engine. Oh, and cheap would be nice too :D.

Question by Rotten194    |  last reply


High Pressure bar - I see potential

Hmm, Browsing The electronics goldmine, I saw this: http://www.goldmine-elec-products.com/prodinfo.asp?number=G17814 Summarized: High pressure loaded hydropneumatic gas spring. This compression spring has an extended length of 32" with an inner rod diameter of 8mm and an outer cylinder diameter of 18.25mm. The compression force is 360 newtons (80.9 lbs of force) and a stroke of 366 newtons (82.2 lbs of force) The first person to post an idea for what this can be used for gets a patch! And maybe other people if I like the idea!

Topic by schumi23    |  last reply


Does someone have engineering drawings for a gas-spring lift-assist assembly (horizontal platform)? Answered

I have a long-dormant project for a "powered" tricycle carrier for a car trailer-hitch. It occurred to me today that a piston "lift-assist" device could do the job. I wonder if anyone here has a technical design for a lift-assist assembly that I could use to understand the mechanism better. I need something that provides lift assistance both raising and lowering (maximum 10 lbs user force either way, for a ~50 lb load).

Question by kelseymh    |  last reply


What can I make to have my 60 lbs dog Betty ride on the back of my Honda Goldwing SE 1500?

Hi, I have a 1994 Honda Goldwing SE 1500 motorcycle and I want to take my dog Betty who is a mix of Boxer and Pit Bull on rides with me on the back of the motorcycle.  I want to have her save and comfortable for a long trip. Any Ideas on something I can make " Here is what the bike looks like. I need to fit her in the rear seat or make some kind of an insert. Thank you

Question by guitarzan214    |  last reply


Ideas for a paint can holder?

These last couple of weeks I've been buying paint for various projects. When I buy many cans, I bring a cart, so that's ok. But when I buy 1 or 2, I tend to carry it. I am strong enough to carry 10 lbs each arm, but the handles on these cans are really terrible. It's just a metal wire. Anyone got any ideas to make a reusable grip to carry these cans? It's just so I can comfortably carry the cans 5-6 blocks home, or to the subway.

Question by alester333    |  last reply


I made chile with a habanero pepper; it is inedible. Anything I could add to the chile to reduce the heat factor?

I would hate to throw 3 lbs of ground sirloin away..any ideas what would cool the chili off?

Question    |  last reply


What motor should I look into for lifting 50 lbs around 35-40 in. off the ground?

I have a project where I very simply need to raise and lower a flat board with a 50 lbs drill press 35-40 in. and have it stop at the same specific place every time going up and coming down. I've seen TV lift mechanisms and things such as that, but they cost $500 - $1,400. I need this project to cost very little. <$100 if possible. I have a scissor design that I will be made from wood that I already have, so all I need is a motor that can lift 50 lbs up and down, slowly, quietly, and only once or twice a week. But I know nothing about motors.  Here are all the parameters that I can think of.  1.) It will be stationary, i.e. — not require a battery or ever need to be moved.  2.) It must move slowly. Lift the surface approx. 1 in per second. i.e. — around 30 seconds to raise the surface 30 in. or so.  3.) It must be as quiet as is reasonable. It doesn't have to be whisper quiet, but def. not power-drill loud. 4.) It must be as inexpensive as possible.  I do not care about... 1.) Motor weight 2.) Dimensions 3.) Power consumption 4.) Heat production 5.) Longevity... it will be used very rarely so wear & tear is a non-issue really I very much appreciate any help you guys can give. 

Topic by Dolmetscher007    |  last reply


What is a good kite boarding kite size?

I would like to know how big of a kite I would need for kite boarding the winds are about 15-20 MPH and for a 120 lb person.

Question by squirt8500    |  last reply


Can u Turn a Pair of dirt bike wheels into bicycle wheels?

Is it Possible to change a pair of dirt bike wheels from dirtbike to bicycle wheels so as to make it support more weight (lbs.), namely mine.

Question by Gator1070    |  last reply


How to build beach balloon tires?

What would be the best way to attach ~ detach a set of wheels to a boat ... to move across soft sand ?  .. weight capacity = 500 lbs How to build balloon sand tires thanx ~Frog~

Question by ~Frog~    |  last reply


Now that's what life is for...

Fishing that is. I got to spend 6 hours today on the Mosquito Lagoon with a professional fishing guide. This was my first time with a pro and it was insanely fun. This guy knew more about fishing than I could even imagine existed. The fishing was a little slow, and the guide cussed a blue streak when we got to his best spot and found a kayaker wading around aimlessly spooking the fish. But I still had a great time and landed the three biggest fish of the day a 14 lb Red and two sea trout 6 & 4 lbs. Numerous smallertrout were caught and released.

Topic by Tool Using Animal    |  last reply


What is the lowest horse power engine which can be used in 165lb aircraft?

I want to buid an light aircraft. But I am can't understand which engine can I use in my aircraft. It will be ababout 165 lb. Please help me.

Question by fairuj    |  last reply


I want to make a scale with the circular guage and the little red pointer that spins how might this be accomplished?

I want to make a strength machine and need a circular guage for it so i want to make a pull scale with the red pointer thing up to 40 lbs

Question by undftdking    |  last reply


Gearing a gearmotor again?

Http://www.mcmaster.com/#cadinlnord/6409k15/=ij4q34 This is the CAD of the gearmotor I want to purchase. I need to gear it AGAIN to attain my design goal of 120-150 lb in of Torque (approx. 3:1 gear ratio). Anybody familiar with this or know if it possible? Any gearboxes to recommend?

Question by nkay3    |  last reply