Tubular Steel Frame vs. Fiberglass Racing Seat?
I am looking into getting a racing seat, such as the MOMO T-Club or the MOMO Super Cup. Just reading the specs, the T-Club weighs 18.9 lbs and is the steel-framed while the Super Cup weighs 18.7 lbs and is fiberglass. Both look exactly the same. Besides the weight difference, would there be a comfort difference between the two?
Is car chassis, frame, subframe, all the same thing?
the frame is the main body of the vehicle that is bolted onto the chassis.
I broke my seat frame from a 1979 trans am!!!!!!!!!!!!!!!!!!!?
I broke the seat frame on the driver side of the car and well i went to the junk yard to see if i can find one but no luck they dont even have trans am's there anymore so i was wonder if i car bolt on a different seat from a different car such as a thirdgeneration model camaro or fire maybe even 2nd generation camaros or firebirds or late models camaros or trans am's i do not want to do major modifications to da seat maybe just a simple one so i am able to bolt it on to my 79 trans am what do you guys suggest i do? and i look at year one and all those website and well i dont have that ammount of money to be wasting specially in this economy.
How do you do basic welding for car repair?
With respect to Girnas, forget the oxy acet torch!!! If you enter into any body shop or related business in the USA, you will find that most of the welding will be done with a wirefeed welder (MIG process). In the past you would see oxy acet being used ... no longer the case!!! You will see it used for cutting or heating or brazing. You can purchase a wire feed machine now in the USA that are not much more than the combined cost of the bottles, mixing chamber, torch head, hoses and tips.what you will be able to do is weld sheet metal with less heat distortion (with spot weld technique) and weld frame members with greater weld strength. With different wire, you will also be able to weld stainless steel and aluminum.
I am thinking of building a sidecar. What size tubing should I use?
If you can't weld the frame, DON'T build it. Early sidecar rig frames were NEVER made of wood; they used steel, just like the bikes did. Remember that sidecars came out in the early teens of the 20th century, a full 25 years after Daimler and Benz (yes THAT Daimler and Benz) built the first motorcycle in Germany. There are a couple of places where you can purchase a prefab frame and build the sidecar body to match up to it (I recommend fiberglass to build the body to keep weight down) and then hit the junk yards for a bucket seat to put in and carpet the interior. Here's a link to a site that sells sidecars and, for the guy that want's to build his own, prefabricated, complete sidecar frames: http://www.dmcsidecars.com/sidecars/side... Most dogs love sidecars (Get your dog a set of Doggles to wear when he/she is riding with you, even in the sidecar), but if yours likes to move around when it's in your car, then getting him/her a seat belt harness for riding in the sidecar is recommended. You can also fully enclose the sidecar with a convertible style canvas top that attaches to the windshield.
Should I use JB Weld or Aluminum Epoxy to fix a crack on my head lug of my aluminum bike?
NO! Do NOT attempt to repair cracks on any bicycle frame regardless of material with JBWeld OR any type of epoxy. First, most cracks in an aluminum frame, especially when they are in the tube rather than at a weld signifies fatigue. Attempting a repair without knowing the cause can be extremely dangerous. Having the frame welded (not JBWelded) at the crack also poses problems in that the frame will anneal and become significantly weaker. Depending on the alloy it may have to be completely annealed after welding then retempered to make it safe. Precipitation hardening is frequently used and requires very expensive equipment. Discard the frame EVEN IF it looks OK everywhere else.EDIT: I just looked at your photo. That is caused by one or more of several things... 1) There may be paint INSIDE the head tube. The 0.06mm or so that the paint adds is plenty enough to cause a crack. 2) If there was an attempt made to reinstall the headset cups without a proper press then that could be a problem as well. 3) A rare possibility is that the cup is oversized but it is a vanishingly small chance.4) It is not uncommon for headtubes to be ovalized a bit after welding. This is well known and most factories ream the interior to ensure a round flat seat for the cups. This step is, um, skipped on entry level bikes.The frame is trash. Do NOT use the bike again. Not ever. Really. Never ever. You are very lucky that it didn't fail altogether... it could have been a poster representing Sudden Catastrophic Failure with you wearing the drool cup.When asking questions such as this it is a really good idea to provide as much information about the bike as possible and what was going on when the failure occurred.
In what situations do you use soldering vs. brazing vs. welding?
Background:Welding is melting the base metal to join it to something else, usually the same metal, and may or may not involve adding extra metal (filler). Brazing and soldering only melt the filler metal.!Answer!:If you want the strongest possible bond, then welding is the way to go. When you weld something, you truly have one piece of material when you are finished. Welding requires more equipment and skill to avoid messing up, and you have to melt your base part.Brazing and soldering can be strong enough and don’t require melting your base metal. If the shape of the base part is critical, or you want to limit it’s exposure to heat, then brazing can be superior to welding for your purpose. The equipment for brazing is cheaper, and it’s reversible so there’s less chance of screwing it up.Notes:Soldering and brazing are essentially the same process of joining one metal to another without melting the base metal- only the filler melts. Soldering is lower temperature, but that’s about it. That lower temperature, though, limits the fillers you can use to just a few soft metals (lead, tin, a couple others) so fillers in the hotter brazing range can provide superior bonds and mechanical properties to soldering.It’s cheaper to set up for brazing, all you need is a torch, but often many different fillers are required to braze different materials and the fluxes you need to use are pretty gross and toxic. If you set up for TIG welding, and you can do it without filler (the parts fit together already), then you can weld essentially any metal all with one machine.Edit:As Erik Halberstadt noted in the comments, brazing with certain fillers can actually have the filler alloy with the base metal forming bonds that are nearly as strong as welds. This allows an interesting third case: you can sometimes make brazed joints that are more flexible than the base material, but still nearly as strong as a weld. You can , for example, braze two pieces of hardened steel together with a bronze based alloy and thus have a joint that is less brittle than a welded joint without compromising the strength of the steel members.Hope this helps!
Which material is best for making a chassis and frame of a go-kart car?
The "best" material for any given application is a compromise and is based on your own perceptions of which factors are important.If you can weld steel, then it makes a good choice as it is fairly cheap, strong, easy to work and easy to weld.If you can weld aluminium, then it might make a better choice, aluminium frames can be lighter than steel but at the downside of being more expensive and harder to weld (IMO).Any sort of metal frame could be bolted together rather than welded, although it is likely to not be as strong or light.Wood could be used if you only have access to basic hand tools, although it would be bulky and care must be taken to ensure it doesn't get too hot.Carbon fibre is another good choice, but only if you have the facilities to manufacture it yourself or enough cash to pay someone else to do it.The "best" material will depend on your own restrictions. For me personally, I would choose steel as I have a MIG welder which I can weld steel with, also it would be cheap and strong.
How do I design a go-kart frame most effectively? What are the steps to follow or things to consider while making a frame for a go-kart?
Note down your requirements - weight of the kart ( can be set based on power of the engine u r going to use), cost of manufacturing ( bigger and more members the frame has…more the cost of welding and material) etcPosition of engine - decide whether u r going to put the engine at the rear or at the side. if its at the side, make sure u make the main frame( excluding bumpers) at least 28 inches wide. in case its a rear engine, make sure the driver has sufficient leg space.Make a research of go kart frame designs. Triangulation gives strength to the chassis. add bumpers.first make a 1:1 chalk drawing of ur first design on the ground, seat ur driver, draw shapes of the engine and get to know basic dimensions that will best suit ur requirement. track width and wheel base, driver seat position, steering rod pivot position can be obtained from this method.next, do a 1:1 pvc pipe model, to adjust the number of bends and welds of ur frame.Understnd where important parts like knuckle, rear axle, brake pedal can be placed. Keep watching videoes of kart and pics to understand different parts of the kart, its use and how it is fixed on to the kart.Decide whether you are going to manufacture al the spare parts or purchase them.If you are going to purchase the parts, decide the dimensions of ur kart based on their dimensions.It is best to first understand designs of the parts and then design the frame, so that it will reduce confusions in the manufacturing stage.Decide the ground clearance, based on tire size and inclination of the rod that holds the knuckle.Basic info of parts:knuckle- c shaped clamp welded to a rod of the frame, that contains assembly of the front tire.stub axle- L shaped part that holds bearings and attaches front tire to knuckle.Rear axle passes through 2 bearings, which is fixed to the frame, with means of a bracket that is welded to the frame. Bracket is fixed. bearing can rotate, in turn bringing about rotatory motion of the axle. Axle will contain brake disc and sprocket(gear).Google for kart pics and observe each and every part.Design a frame that doesn't succumb to bending, and is as light weight as possible. Tony kart design is the standard go kart design. u can take guidance from that and use your creativity on it.All the best.