@ketmaniac Thanks. The weight shown in the video was 10 lbs., but a one time attempt at 20 lbs. was at the same height of around 60 inches. It broke the drawer slides. I have no idea of velocity. The angle was very low maybe in the 20 degree range. More height and it would have gone further.
The tennis ball hurling one in the video is about 4 feet high at the axle with a throwing arm around 51" total length IIRC. I built it that size so I could transport it by myself. Are you thinking of building one?
@desel09 Sorry to be answering so late. Not much bigger. Tennis balls are very poor fliers (projectiles) and are good for situations when you don't want to break anything in your neighborhood but want to test your machine safely.
try more dense projectiles, steel, lead, tungsten, copper, or any kind of metal really will make that 20lb counterweight waste less energy. you could probably mess with the sling length and use a 4oz lead ball with the same weight and because it hass less air resistance you could top 300 or 400ft
I saw one where the weights are on both sides of a bar that slide straight down two guides. The senter of the bar is connected to the arm which has a cross bar that moves horizontaly across a guide track at the arm whips up.
Nice machine. Would you tell me what height the 20lb CW drops through? Have you any idea of the take-off velocity?
ketmaniac 7 months ago
@ketmaniac Thanks. The weight shown in the video was 10 lbs., but a one time attempt at 20 lbs. was at the same height of around 60 inches. It broke the drawer slides. I have no idea of velocity. The angle was very low maybe in the 20 degree range. More height and it would have gone further.
CBasement 7 months ago
hay my name is bryce ha
flanker1498 9 months ago
The tennis ball hurling one in the video is about 4 feet high at the axle with a throwing arm around 51" total length IIRC. I built it that size so I could transport it by myself. Are you thinking of building one?
CBasement 10 months ago
how big would you build the frame if you were hurling a tennis ball?
desel09 10 months ago
@desel09 Sorry to be answering so late. Not much bigger. Tennis balls are very poor fliers (projectiles) and are good for situations when you don't want to break anything in your neighborhood but want to test your machine safely.
CBasement 7 months ago
try more dense projectiles, steel, lead, tungsten, copper, or any kind of metal really will make that 20lb counterweight waste less energy. you could probably mess with the sling length and use a 4oz lead ball with the same weight and because it hass less air resistance you could top 300 or 400ft
drewnickel 1 year ago
do u know where i could get plans or could u send me some?
parker5013 1 year ago
No plans available. Lost all my drawing files when my hard drive crashed earlier this year.
CBasement 1 year ago
That is awsome!
I saw one where the weights are on both sides of a bar that slide straight down two guides. The senter of the bar is connected to the arm which has a cross bar that moves horizontaly across a guide track at the arm whips up.
5/5 stars!
ARMOROID5000 2 years ago
Thanks. Check my other FAT/F2K videos of the trebuchet you're describing.
CBasement 2 years ago