Time Traveller

You step into the room and narrowly miss a hammer flying through the air. A short fat man waddles after it, then notices you and sticks out a grubby hand.
"Castle weaponmaster at your service!" He says in a voice that sounds like gravel being shaken in a metal bucket. You shake his hand and tell him why you are there.
"Ah, good, good!" He says, "I always like to try new stuff."
You spend the rest of the day creating a new weapon using the skills you have learnt as a scientist. However, knowing that if you mess around with things here, you could mess up the future, you have made the weapon so that it will not work when used.
Eventually, night falls, and you lay down on a bed in the corner of the room. Should you try to escape tonight? Or wait until morning?
"Castle weaponmaster at your service!" He says in a voice that sounds like gravel being shaken in a metal bucket. You shake his hand and tell him why you are there.
"Ah, good, good!" He says, "I always like to try new stuff."
You spend the rest of the day creating a new weapon using the skills you have learnt as a scientist. However, knowing that if you mess around with things here, you could mess up the future, you have made the weapon so that it will not work when used.
Eventually, night falls, and you lay down on a bed in the corner of the room. Should you try to escape tonight? Or wait until morning?