- #1
koujidaisuki76
- 28
- 0
Hello!
I am in the Science Olympiad and I am doing the event called Boomilever where I have to make a cantilever like structure that is attached to the wal. The boomilever has to hold 15 kg or 33 pounds at one end. It can break but the purpose of this event is to have the highest efficency. Right now I'm trying to make a 10-15 gram boomilever that will actually hold. I've made three of these and they have all broken. I would think since I've made bridges and towers before it wouldn't be hard but boomilevers turns out that it's properties are completely different then that of the bridges and etc..
Specs:
It can only be made out of wood. I use bass and balsa wood..
for glue I use CA ZAP (pink) and it tends to work very well..
Size: the loding block can not be lower then 20 cm from the bolts and the boomilever can not be less then 40 cm...
and the loading bloack is 5 by 5 by 2 cms.
My observations based on my failures..:
My boomilever I have made looks like this:
(see attachment)
After I tested it, I noticed that there was a lot of force ont he bottom part of the boomilever. Compression force. The top part is tension and it seems for now I do not have problems with that.
My problem is the compression part.
How do I make a boomilever that can withstand the compresion forces?
It's hard to see in the pic but the bottom of the boomilever is made of 2 1/8 by 1/8 bass wood with X's glued in between
I am in the Science Olympiad and I am doing the event called Boomilever where I have to make a cantilever like structure that is attached to the wal. The boomilever has to hold 15 kg or 33 pounds at one end. It can break but the purpose of this event is to have the highest efficency. Right now I'm trying to make a 10-15 gram boomilever that will actually hold. I've made three of these and they have all broken. I would think since I've made bridges and towers before it wouldn't be hard but boomilevers turns out that it's properties are completely different then that of the bridges and etc..
Specs:
It can only be made out of wood. I use bass and balsa wood..
for glue I use CA ZAP (pink) and it tends to work very well..
Size: the loding block can not be lower then 20 cm from the bolts and the boomilever can not be less then 40 cm...
and the loading bloack is 5 by 5 by 2 cms.
My observations based on my failures..:
My boomilever I have made looks like this:
(see attachment)
After I tested it, I noticed that there was a lot of force ont he bottom part of the boomilever. Compression force. The top part is tension and it seems for now I do not have problems with that.
My problem is the compression part.
How do I make a boomilever that can withstand the compresion forces?
It's hard to see in the pic but the bottom of the boomilever is made of 2 1/8 by 1/8 bass wood with X's glued in between
Attachments
Last edited by a moderator: