Trying to come up with an idea for a manual hand-crank 'furnace' for 'sucking' in air into a closed-off compartment How can I create negative air pressure inside the chamber? A Fan? Some sort of rotary engine type entry? Can this work? Is it viable? Just going for forced induction for a greater amount of oxygen inside the chamber = Larger flame...?
i just got a flight stick for games (was a used one) and when i got it the joystick was catching on....nothing and making it very hard to control my aircraft, now i know what needs to be lubed but i don't know what is safe for plastics....any ideas?
'Sup /diy/. About a month ago my central vac died. After taking it all apart, I couldn't find anything wrong, so I put power directly on the motor. It worked, so I figured with a relay I could bypass all the original massive circuit boards and just have a 12v line trigger a relay to turn the motor on.
My problem is that this motor is massive and would present a huge inductive load on the circuit. Just to be safe, I'll assume 15A at 120V. At present, I just have it on a plug that I plug in when I need it and unplug when I'm done. But this is clumsy and annoying, and I get that arc every time I do it. What can I do to make this vacuum turn on with a relay at a reasonable price? I don't mind soldering or wiring at all, but I don't even know where to start on a circuit or proper relay. Every relay with HP ratings or inductive ratings high enough I can find is $80 minimum.
Any advice on motors and relays would be greatly appreciated. Or perhaps where to buy a suitable relay at a suitable price. (Hard mode: Canadafag here) Thanks /diy/.
>>970759 What about a solid state relay? A 100A SSR from China can be found on the internets for ~$15 cdn, and should be big enough to withstand the inrush current. Full disclosure: I don't really know what I'm talking about.
>>970782 Solid state is good for rapid switching, not so good for continuous load unless you way oversize the motherfucker.
>>970759 A: look at the motherfucking unit B: find the continuous amp rating on the motor C: Go to Home Depot, get a thermal circuit breaker rated to what you found in step B D: wire the line lead to the breaker and the neutral straight to the motor
This gives you over current protection (a must if you're fucking around with... Comment too long. Click here to view the full text.
A little over a month ago I bought a PoulanPro with a B&S 450E in it. So far I have used it 3 times. Each time but the first I have had to pull and clean out the carb. Any suggestions to prevent this? I am planning on adding an inline fuel filter from the tank to help catch any sediment. Just wondering if anyone had any other suggestions.
>>970748 Youprobably hae some gunk and water (from condensation) in the fuel tank. Before you fit the filter, disconnect the fuel line and let the tank drain completely, toss away the waste gasoline (or use it for bbq starter) and fill it up with 90%gas and 10% ethanol. That shoul clean most of the shit out.
Also; since you wrote that you already cleaned out the carburettor twice, I'm assuming you already checked all valves, et c. If you didn't, et an air compressor and start working. Inside and outside.
>>970748 Not to insult your intelligence but I'd consult your owner's manual. Simple machines and engines can have really finicky requirements most of the time. If you're not adding enough engine oil, or the wrong grade, or too much, or you're not doing the choke right, or you're priming it wrong with a return line valve that should be open when it needs to be closed, ect. A lot of shade-tree mechanics will overlook shit like that.
Without ever having meeting you or seen your shitty lawnmower I'm... Comment too long. Click here to view the full text.
Recently got interested in customizing and making guitar myself. Because my lack of experience and due the availability and pricing of parts in my lovely overtaxed Scandinavian homeland, I thought it'd be easier to start of with one of those standard type (lp, strato, tele etc.) kits. That way I'd have reference parts to play around with and learn. Sure enough, there's a trustworthy online store that offers those at a relatively low cost of around 90 euros with postage and some degree of quality assurance though definitely not expecting... Comment too long. Click here to view the full text.
>>970726 I would just buy a used guitar which is what I did. With musical instruments, especially guitars, buy one, learn to play a few chords, learn 'Smoke on the Water' get bored with it and either let it sit collecting dust or they sell it. Most used instruments are barely-used and relatively cheap. I dunno if there is some weird tax on guitars where you live but a used, basic Squier Strat should'nt cost much more that 200-400 euros. I bought my in Alaska used at a music store for $170 and it included an amp.
If... Comment too long. Click here to view the full text.
I stay in 25years old High Rise building. Im at top floor and my water pressure sucks. It gets worst due to rusted pipe inside my walls. Tried 0.3hp water pump directly from meter. There was slight improvement. But water pump blown to amount of rust formed in the motor itself. Looking for alternative such as installing filter, then water tank and pump water to house inlet. Any suggestions to do it in cheaper cost ?
>>970572 You are approaching this all wrong. Your only hope is to start with a small diameter pilot hole. Unless the grain is perfectly straight, drilling won't work and even if the grain is straight, drilling is a 5% chance. I make tomahawks and the pipe ones have the haft holed for smoking. The only thing that works is to use a small diameter steel rod heated to cherry red and plunged through the center. It's slow go, an inch or so at a time but it will allow you to stay true and centered. Once you have the pilot... Comment too long. Click here to view the full text.
Good resistant paint for steel, aluminum...? I always making things of steel and aluminum, and always when I try to give a good finish, I paint then with black paint, but it seems the paint does not last a scratch... It is there any type of paint with a good resistance... I don't want the paint to be chipped out the next day...
>>970497 uhh, you need a university degree for that. it's an associate engineering degree at the least. there is more to surveying than just putting down a theodolite. you need to understand geology and trigonometry. >you are surveying potential roads >you find yourself in a location >is it the best location? it's flat and dry >it's fucking sand and it will wash out >is... Comment too long. Click here to view the full text.
>>970499 okay thanks. makes sense really. didnt know you needed an eng degree though. thats what im studying at the moment and thought i might be able to pull some small surveying role at the same time (i think i'd understand the geol and trig).
but just looking up qualifications and it says to become a registered surveyor takes 2 years practical experience.. by that time i'll have the eng degree anyway.
and i'm guessing that no one wouldn't take on any unregistereds
Hear me out /diy/ The pic related is a repeating crossbow as you can tell. Now, i have been intrigued thinking of ways to improve it. Then i remembered the crossbow in Skyrim. If you remember it, it had a lever that pulls the string into place and readies the trigger, the bolt in manually jammed into the slot and the string is behind it ready to shoot. Then i look at the chinese one with a cartridge above, gravity drops the bolts into place and there is no trigger, just push-pull until its empty and there are no cross-hairs because of the cartridge. Also, i remembered... Comment too long. Click here to view the full text.
well what you have in your picture is a "Chu-ko-nu"
it fires an arrow in one motion by using the arrow magazine to draw the string, pre-knocking the bolt
they were made to fire a voley of tiny arrows very quickly, and were used en-masse by relatively untrained archers to hinder an enemies pike formations
they were neither accurate or powerful, because the draw is relying on a single action lever fired from the upright position you COULD make a powerful version, but that would lower your rate of fire and at that point the whole design looses... Comment too long. Click here to view the full text.
Has anyone ever hung drywall perpendicular to a bare concrete wall? I've hung my fair share but it's always been angled to other drywall surfaces so this is alien to me. Should I just leave a small gap between the concrete and the drywall edge similar to the one on the floor?
I'm sure this is frowned upon but is there a protocol for it?
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