Sorry but... is this really [EE] ? Best Regards, ---- Ariel Rocholl -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Isaac Marino Bavaresco Sent: Saturday, November 22, 2014 20:27 To: Microcontroller discussion list - Public. Subject: Re: [Bulk] Re: [EE] Best DIY Puffer HoneyTrap In Portuguese there is just the word "motor", for any kind of motor or engine. On 22/11/2014 17:04, David C Brown wrote: > So they should be called engine vehicles or engine cars? Not si. A=20 > motor is a "device which causes motion" and an engine is one type of=20 > motor.. So calling an engine driven vehicle a motor-vehicle is no=20 > more incorrect than referring to diesel oil or LPG as fuel. > > On 22 November 2014 at 17:44, Richard R. Pope > wrote: > >> Justin, >> That is correct. Even though we call them freeze plugs they were=20 >> never designed to protect the engine and usually they don't. Most of=20 >> the time if the coolant freezes it will break the radiator if you are=20 >> fortunate. If not it deforms or even cracks the cylinder walls. >> We have a lot of bad information floating around in the states=20 >> about cars and motorcycles. Like calling them motorcycles. They are=20 >> for the most part engine cycles but that is kind of awkward to say.=20 >> The prime mover in most cars is an engine, not a motor but supposed=20 >> knowledgeable people still call them motors. True there are now cars=20 >> with motors in them either as a hybrid setup or even as the only=20 >> driving force. We even call it motor oil and yes it can be used to=20 >> lubricate motors but for the most part it is used in engines. >> And then there is the one about if you set a battery down on a=20 >> concrete floor it will ruin the battery. This is not true. It used to=20 >> be when the batteries were made with wood cases. >> Or if you leave the thermostat out the engine will run hot=20 >> because the coolant is going too fast to pick up the heat. This=20 >> violates one of the laws of thermodynamics and I don't remember which=20 >> one. The reason it runs hot is because most cooling systems have a=20 >> bypass hole so that coolant will circulate through the engine when the thermostat is closed. >> If the thermostat isn't there hot coolant is being directed right=20 >> back into the engine without going through the radiator. On some=20 >> engines the hole was only about a quarter of an inch in diameter. In=20 >> some engines the hole could be close to two inches. That is a lot of=20 >> coolant that never makes it to the radiator. >> Then there is the worst one of all. A person has a small leak=20 >> somewhere and they believe that as long as they keep the cooling=20 >> system full everything will be OK! NOT so. This will cause bubbles of=20 >> air to form in different parts of the engine and in passages in the=20 >> cooling system. These air pockets act as insulation and they will=20 >> cause local over heating. These hot spots will not show up on the=20 >> temperature gauge but the damage is being done. Also the pockets of=20 >> air can interfere with the circulation of the coolant and this will caus= e general overheating. >> Also with a sealed system the pressurization of the system can't take=20 >> place which raises the boiling of point of the coolant. The final=20 >> damage is the pockets of air cause cavitation and allow oxygen in to=20 >> the system which causes corrosion. >> So there is a lot of bad info out there. But it is fun to listen=20 >> to and then just stand there and shake your head at. :) Thanks, rich! >> P.S. I just learned something new. There is a strong drive on to try=20 >> and switch over to a hydrogen based system. Well hydrogen is the=20 >> smallest of all molecules and it is almost impossible to build a=20 >> container that doesn't leak. It is also the lightest and least dense of all molecules. >> So as you increase the pressure to try and put more and more hydrogen=20 >> in to a container which directly affects range the storage problem=20 >> becomes even more difficult. >> So here is a scenario to think about. Whoever fills their tank=20 >> up and parks at the airport in a semi-enclosed parking structure The=20 >> vehicle is sitting there with the hydrogen slowly leaking out of the=20 >> tank. The best case scenario is this person gets backs after a couple=20 >> of weeks and the tank is empty. The worst scenario is that someone is=20 >> walking by the car and pulls out a match to light a cigarette. The=20 >> parking garage ends up in the adjoining counties. Just something to=20 >> thing about. >> Thanks, >> rich! >> >> On 11/22/2014 2:51 AM, Justin Richards wrote: >>> Thanks rich, >>> >>> I can imagine from your explaination that there's many stories of=20 >>> people driving of without unplugging first. >>> >>> And wrt the plugs I take it from the description it is what I know=20 >>> as a welch or core plug that are used to plug the holes that the=20 >>> moulding sand is poured out of. >>> >>> Cheers Justin >>> >>>> There is another type that is inserted in to the engine block=20 >>>> in place of what we Americans call a freeze plug. I believe you=20 >>>> folks call it a soft plug. Again you plug it in at night and it=20 >>>> will keep the coolant at about freezing in 30 or 40 degree f below zer= o temperatures. >>>> >> -- >> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive=20 >> View/change your membership options at=20 >> http://mailman.mit.edu/mailman/listinfo/piclist >> > > -- http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/chang= e your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .