Difference between revisions of "Trebuhole"
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| − | + | Trebuhole is what I named my model trebuchet. It has been fired a few times in the past but I was inspired by the [[Bangarang]] to play with it some more. I had an [[Image_talk:Roughtrebuchetdiagram.jpg|interesting discussion]] with [[User:James.|James.]] about the horse being used as a payload, and about the length of the sling ropes. | |
| − | [[Image:Trebuhole Horsesetup.JPG]] | + | == Technical Specifications == |
| − | [[Image:Trebuhole Horsefail.JPG]] | + | As shown in the [[:Image:Roughtrebuchetdiagram.jpg|Rough Trebuchet Diagram]], there are some measurements that must be considered for trebuchets. Trebuhole has these measurements (in inches): |
| + | |||
| + | L1=19" | ||
| + | |||
| + | L2=15" | ||
| + | |||
| + | L3=4" | ||
| + | |||
| + | L4=4" | ||
| + | |||
| + | L5=Varied during trials in order to see if long or short sling rope length is best. | ||
| + | |||
| + | H1=9" | ||
| + | |||
| + | H2=5" | ||
| + | |||
| + | == Preliminary Attempt == | ||
| + | I decided to use a relatively large toy horse as my payload to attempt to figure out if doing so is feasible. This is the setup: [[Image:Trebuhole Horsesetup.JPG]] | ||
| + | |||
| + | Unfortunately, the horse was inserted backwards, and the legs caught on the sling and the launch was unsuccessful. [[Image:Trebuhole Horsefail.JPG]] | ||
| + | |||
| + | == Subsequent Attempts == | ||
| + | I had my kids build a castle out of Legos as a target for the Trebuhole. [[Image:Trebuhole_Legocastle.JPG]] | ||
| + | |||
| + | I then set up a lego horse facing the correct way (legs toward bottom of swing arm). The sling length (L5) here is 11 inches. | ||
| + | [[Image:Trebuhole Legohorsesetup.JPG]] | ||
| + | |||
| + | I also set up Trebuhole with a longer sling rope length (L5=19 inches) using some blue string. | ||
[[Image:Trebuhole Longstringsetup.JPG]] | [[Image:Trebuhole Longstringsetup.JPG]] | ||
| − | + | ||
| − | + | == Results == | |
| + | Coming soon. | ||
Revision as of 03:44, 23 June 2008
Trebuhole is what I named my model trebuchet. It has been fired a few times in the past but I was inspired by the Bangarang to play with it some more. I had an interesting discussion with James. about the horse being used as a payload, and about the length of the sling ropes.
Technical Specifications
As shown in the Rough Trebuchet Diagram, there are some measurements that must be considered for trebuchets. Trebuhole has these measurements (in inches):
L1=19"
L2=15"
L3=4"
L4=4"
L5=Varied during trials in order to see if long or short sling rope length is best.
H1=9"
H2=5"
Preliminary Attempt
I decided to use a relatively large toy horse as my payload to attempt to figure out if doing so is feasible. This is the setup: 
Unfortunately, the horse was inserted backwards, and the legs caught on the sling and the launch was unsuccessful. 
Subsequent Attempts
I had my kids build a castle out of Legos as a target for the Trebuhole. 
I then set up a lego horse facing the correct way (legs toward bottom of swing arm). The sling length (L5) here is 11 inches.
I also set up Trebuhole with a longer sling rope length (L5=19 inches) using some blue string.
Results
Coming soon.
