Despite Lilienthal's fate, the brothers favored his strategy: to practice gliding in order to master the art of control before attempting motor-driven flight. The death of British aeronaut Percy Pilcher in another hang gliding crash in October 1899 only reinforced their opinion that a reliable method of pilot control was the key to successful—and safe—flight. At the outset of their experiments they regarded control as the unsolved third part of "the flying problem". They believed sufficiently promising knowledge of the other two issues—wings and engines—already existed.  The Wright brothers thus differed sharply from more experienced practitioners of the day, notably Clément Ader , Maxim and Langley who built powerful engines, attached them to airframes equipped with unproven control devices, and expected to take to the air with no previous flying experience. Although agreeing with Lilienthal's idea of practice, the Wrights saw that his method of balance and control by shifting his body weight was inadequate.  They were determined to find something better.
ANSWER: First of all, you don't HAVE to take steroids to compete. There are many contests for natural athletes out there. However, if you're sure you're doing this for YOU and not to appease your trainer, then I would say that Anavar is probably the mildest and the safest drug to start with. It was actually originally prescribed for the treatment of osteoporosis and it has a very low androgenic index. You'll also experience more strength gains than actual weight gains. This will lead to a tighter more muscular defined "look". As with any drug, start with a low dose to see how you respond and don't rush into increasing the dose until you're sure your system can handle it. I'd say start with 5 to 10mg/day. Anavar doesn't convert to estrogen and has a minimal effect on natural hormone production. However, you must still look out for virilizing side effects such as deepening or hoarseness of the voice, increased body hair, and increased acne.