the rc planes are scale models of some real airplanes, this airplanes can be gas or electric powered most of rc planes was electric because is much simple to use, an a rc airplane consist of:

-The airplane:
                   
 this is only the stucture of the airplane...

-The motor                                             

electric motor



the servo

(motor that moves the flaps, aileron, etc)


The radio and receiver

battery

Rc airplanes can be of different types :


Gliders

scale
 
Aerobatic


 rc airplanes are used in very important jobs like, movie films, fish locating (in the sea) and militar missions.

how can drugs affect the brain?
 The effects of drugs on the brain depends on the drug itself. Heroin makes the brain dependent on it, while marijuana can effect emotions, memory, and judgment

how can steroids affect our body?
Anabolic steroids are artificial versions of a hormone that's in all of us -- testosterone, this things make your testicles smaller, because of steroids replace tetestorene, and testosterone make yours testicles grow. (That's right, testosterone is in girls as well as guys.) Testosterone not only brings out male sexual traits, it also causes muscles to grow. Some people take anabolic steroid pills or injections to try to build muscle faster. ("Anabolic" means growing or building.)

how what are club drugs? 
club drugs are those that was sell by night clubs and bars, this drugs unlike street drugs are much expensive and are very well presented at diference than street drugs that are poor precented.

what can they (club durgs) do to our body?
Club drugs have varying effects. Ketamine distorts perception and produces feelings of detachment from the environment and self, while GHB and rohypnol are sedating. GHB abuse can cause coma and seizures. High doses of ketamine can cause delirium and amnesia. Rohypnol can incapacitate users and cause amnesia, and especially when mixed with alcohol, can be lethal.

           Can money and fame make happiness?

 First of all, happy people are not in all cases famous people; first reason, common people get married and this famous people and singers for example, they becauseof the all time travel, cant has a partner (wife or husband) so they feet alone, so this can make go discotecs a lot and this can have as consecuence consume drugs.
some times to earn money you have to work a lot, and work and make a big effort, provide a greatfull satisfaction, and this is happines.