You rang? I'm helping most people out with rotarycraft lately, since I love playing with that mod. First, there are 3 tools you should always have with you when doing rotarycraft stuff. Now, I don't have nearly the hardware or stage presence to do a lets play, but I'll try and explain some stuff.
#1: The rotarycraft handbook. This book has most of the stuff you'll need to know when using rotarycraft. It is quite huge, and seems daunting at first, but it contains a lot of useful information.
#2: Angular Transducer. This nifty device will tell you how much power is going into a part, how much power it needs, and what kind of power it needs, as well as a bunch of other miscellaneous information like fuel storage and run time.
#3: Screwdriver. This is used to rotate and adjust the machines.
One difference between rotarycraft and other mods is that you don't have stored power on machines. You need a certain threshold of mechanical power, and if you don't have it then the machine won't work. You can put it more power if you want to, and most machines run faster the more power you put into them, so feel free to go nuts with power input.
Now, for the basics on how to get something to work. Easiest way is to do this:
1)Look up the machine in the rotarycraft handbook and see if it tells you there.
2)If it doesn't tell you there, place the machine down and right click using the angular transducer. This will usually tell you how much power you need, as well as how much, if any, torque and speed you need.
Next is modifying power. While the engines might have enough wattage, they might not have it in the right place. Too much speed, not enough torque, stuff like that. There are a few ways to modify power to get what you need.
Gearbox: The gearbox has two modes. Torque mode changes speed into torque, and speed mode changes torque into speed. This is changed by sneak + right-clicking with the screwdriver. The way it works is that, for the amount of gears in the gearbox (x2, x4, x8, x16), it will multiply one form of power by that number, and divide the other. So if you have a 2x gearbox on a steam engine, which puts out 32 NM at 512 rad/sec then in torque mode it will change the power output to 64 NM at 256 Rad/Sec.
Gearboxes are a bit hard to use, since they require lubricant to function. Lubricant production is a whole other barrel of monkeys, but for now I'll leave this tidbit: The higher tier gearbox you use, the less lubricant it needs. Wood uses the most lube, stone uses less, steel uses even less, and while diamond requires lubricant it doesn't consume any. I'm not sure bedrock gears need lubricant at all.
CVT: the CVT is an adjustable form of power manipulation. While the gearbox has set ratios of x2, x4, etc, the CVT can be adjusted to have up to x32 power manipulation. The CVT requires a series of belts to do this, and the more belts you have, the higher you can manipulate power. The CVT also requires a bit of lube, but like the diamond gearbox it doesn't consume the lube. (NOTE: the lube requirement may be bugged at the moment, because even though the mod author Reika says it needs lube, it seems to function without it).
Shaft junction: This is the device used to combine the inputs from multiple engines, or split the input from one engine. You can change the mode with the screwdriver. When combining, the shaft junction will add the torques of the inputs together, but will only do this if they are running at the same speed. When in splitting mode, it will divide the torques up in the set ratio, while keeping the same speed.
Industrial Coil: This is one of the two devices that can be used to store power. The important thing about the industrial coil is that it can output power at exact specifications. So, with the coil, you can let it wind up for a long time, then output all of the stored power to tailor fit the machine you need it to.
And finally, lube. Lubricant is made by grinding canola seeds in a grinder, and this is usually the first obstacle that new players encounter, as there isn't an obvious way to do this. The grinder requires 128 NM of torque, and the earliest engine that outputs this is the gasoline engine. Unless you are a fan of free automation and large builds, the easiest way to start getting lube is to make a DC engine + fermenter, make a bunch of ethanol crystals, and then use those crystals to power a gasoline engine on a grinder.
If you are a fan of bigger builds, then this thread might help a bit:
http://forum.feed-the-beast.com/threads/rotarycraft-the-mindblower-and-builds.36449/#post-500399