An air-soft gun's (FPS) stands for (feet per second), and the (RPM) stands for (revolutions per minute). The fps is the overall power of an air-soft gun, the rpm is how fast the gun will shoot out the bbs. If you have any more ?'s, I'd be happy to help. :)
Unfortuneately, there is no gun that will do both reliablely. Most guns that are high fps or high rpm are upgraded. But, out of the box, the hardest hitting gun is the Systema Super Max. With the red cylinder (I think), it shoots 500 feet per second. The high rate of fire gun will have to be created by yourself most likely, but the best on the market would probably be the Echo 1 Minigun.
If rpm is measuring how fast or far it goes it's not measured in rpm. It's measured in fps (feet per second) A Crosman Pulse R72 has 325 fps. Of course, it's electric which adds 50 fps to it so it's actually 375 fps. I hope this was the correct answer to your question.
Look at the fps rating at both the guns. FPS stands for feet per second, which ever one has more fps has more fire power. But be warded, sniper rifles are mostly spring, which means you have to cock them. Machine gun airsoft guns (AEG's) are electric. If its rpm, go for an electric, but be warned...lots of websites lie about the guns real fps so lots of times the gun will go in real life 373 fps when the website says it goes 400. Make sure to do alot of research before making a purchase, and read lots of reviews.
3000 rpm or lower
most are around 3400 rpm
rpm
From my experience you get the best gas mileage when you are in the highest gear and your rpm is low, around 1500 to 2000 rpm.
Badass - 2010 Best of RPM 1-12 was released on: USA: 19 November 2010
1400 RPM after you have gone through the gears and at road speed.
Just leave that gun in your closet, or if you havent bought it, save your money because a cheap plastic crossman aeg that will protect you in a battle does NOT exist. On top of that, the R71 is the worst the worst out of the entire R series, and I would know because no one told me to not buy airsoft at dicks sporting goods. Save yourself the trouble and buy a mp5 off of airsoftgi.com or evike.com if you like the model, but I would recommend an M4 for beginners, like a Combat Machine M16 carbine, or any other combat machine, they are all very good for beginners. Oh, and to answer your question, 15-20ft. *self edit* the Pulse R76 is actually pretty good for a beginner, so just buy that one. But only if its your first true airsoft gun. And dont take it to a field because you will get dominated by people who actually spend money on guns and upgrades.
for the most part rpm is counting from alternator (generator) there should be two wires one for rpm second for waking alternator
The optimum range on that engine is 1100 to 1500 rpm, depending on how it's geared.
That depends, is a a 520 SATA for a notebook or Desktop. Most notebooks have a 5400 RPM, though you can purchase 7200 RPM drives. Desktops are generally 7200, but can go to 10000 RPM. SCSI drives, which 520 isn't usually, can also go to 15000 RPM.