I was hoping to make a simple drone that can go forward for a set amount of time.Is it possible to do that without any sensors
I love this kind of dead simple answer. :D
Wait .. don't forget relativity... the time of the object in motion might not be the same as the observing time.
How would you do it ?
Of course if the set amount of time is more than a fraction of a second, the answer would be no.
You need sensors for stable flight. You also need to be more exact when asking questions - a lot of people seem to think that words like "amount", "slow", "large" are meaningful, when they could have used a numerical value and been clear.
IBNU12: How would you do it ?
Me? I'd go buy one instead of DIY. Drones are now inexpensive.