Airplane Engine Starter What is the relationship between starter and engine on airplane?
The engine can start up when master switch and battery is off while the ignition switch is on.Is there any business of starter in this process?I mean,the engine can start up without starter in this case(master switch and battery is off while the ignition switch is on),doesn't it?
Since you are talking about an ICE (Internal Combustion Engine) and not a turbine the process is similar to an automobile with one exception. Engines in aircraft utilize magnetos for ignition. Magnetos are self-energized ignition sources that produce their own spark without the need for a battery. In the off position the magnetos are grounded and thus the spark flows back through the engine/airframe to the battery. Aircraft can be started without using the starter by turning the ignition switch to the on position (left, right, or both normally) and turning the prop by hand (propping).
Just like in an automobile, the purpose of the starter is to turn the engine in the proper direction. In an automobile the ignition system is energized by the battery until the engine starts, then the alternator (in modern engines) assumes the electrical supply.
Because the magnetos do not rely on the battery or alternator for electrical supply they remove the possibility of failure due to the electrical system. There are also two magnetos (for redundancy) that operate separate sets of spark plugs, which is why each cylinder has two spark plugs.
The master switch has two purposes which are sometimes done by a single switch or two separate switches. The first purpose is to close the circuit which allows the starter to be engaged (normally by the ignition switch or a separate start button). The second purpose (switch) closes the circuit which allows the alternator (generator on older aircraft) to power the electrical bus. The battery can power the elctrical bus before the engine is started but once the voltage of the alternator comes up the battery becomes a backup device. It is recharged and at the same times acts to help smooth out the current at the bus.
One of the things that is done during a preflight is to check to see if the leads from the magnetos are not broken which would put the engine in a condition where it could be started. Of course the fuel would also have to be on or else the engine would stall.
Another issue to remember is that the “cooling” you get from decompression is correlated with heating caused by compression. If you were to compress air and then decompress it, it would come out the same temperature (and actually over all things would be slightly hotter, assuming that your compressor is not 100 percent efficient. So the only way this would work would be if the tank had a chance to cool off to dissipate the heat “generated” by the compression. I think a more effective, cheaper solution would be to get one of those remote engine starter kits, and fire it up before you get to your car. It would give a chance for the fans to circulate some of the hot air out and get the A/C compressor started before you get to your car. What *I* do is I open the passenger side window and leave the driver’s side door open (with a shut window) when I back out of a parking spot. The open door forces huge amounts of air in the car, basically moving all the hot air out. Try it sometime. Just make sure you don’t hit anything.
Takeaways from Google's Updated Search Engine Optimization Starter …
midway615 October 31st, 2010 @ 5:11 am
In the "old days" I would wait until dark and with the motor running – gently spray a little water around the engine. If there were bad wires you may get some sparking to show you where to look. You will have to wipe things down a little. (Before electronic ignition I used to spray engine degreaser on my motor all the time then spray it off with a hose to keep it clean looking.)
Don't do this trick far from home. It will work in your driveway just as well as away from home. Look for loose wires. Look for wires that are damaged or squashed and shorting out. Check for battery connections.
Clean out your air cleaner, if it hasn't been changed in years get a new one. When your car does not start have someone pull a plug and with another person turning the car over see if you get a spark. If you get a spark you may have a fuel starvation problem. Also, does this happen with a full tank of gas or with a low amount of gas?
When you put new spark plugs did you gap them properly yourself or did you listen to the boob at the parts desk that said "they are already gapped right."
September 29th, 2010 @ 8:39 am
haha love that sound :p
September 29th, 2010 @ 1:03 pm
Another issue to remember is that the “cooling” you get from decompression is correlated with heating caused by compression. If you were to compress air and then decompress it, it would come out the same temperature (and actually over all things would be slightly hotter, assuming that your compressor is not 100 percent efficient. So the only way this would work would be if the tank had a chance to cool off to dissipate the heat “generated” by the compression. I think a more effective, cheaper solution would be to get one of those remote engine starter kits, and fire it up before you get to your car. It would give a chance for the fans to circulate some of the hot air out and get the A/C compressor started before you get to your car. What *I* do is I open the passenger side window and leave the driver’s side door open (with a shut window) when I back out of a parking spot. The open door forces huge amounts of air in the car, basically moving all the hot air out. Try it sometime. Just make sure you don’t hit anything.
September 29th, 2010 @ 11:11 pm
Takeaways from Google's Updated Search Engine Optimization Starter …
October 31st, 2010 @ 5:11 am
In the "old days" I would wait until dark and with the motor running – gently spray a little water around the engine. If there were bad wires you may get some sparking to show you where to look. You will have to wipe things down a little. (Before electronic ignition I used to spray engine degreaser on my motor all the time then spray it off with a hose to keep it clean looking.)
Don't do this trick far from home. It will work in your driveway just as well as away from home. Look for loose wires. Look for wires that are damaged or squashed and shorting out. Check for battery connections.
Clean out your air cleaner, if it hasn't been changed in years get a new one. When your car does not start have someone pull a plug and with another person turning the car over see if you get a spark. If you get a spark you may have a fuel starvation problem. Also, does this happen with a full tank of gas or with a low amount of gas?
When you put new spark plugs did you gap them properly yourself or did you listen to the boob at the parts desk that said "they are already gapped right."
Good luck.