Search found 144 matches

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by madmattd
Sun Dec 10, 2023 11:31 am
Forum: Catapult Message Board
Topic: advise on getting more distance
Replies: 5
Views: 22333

Re: advise on getting more distance

my first trebuchet broke when I tossed a very-small pumpkin without reducing the counterweight. The light load didn't offer much resistance, so the counterweight fell quickly and didn't transfer much energy to the projectile. And all that excess energy found the weak points in my frame design. As, ...
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by madmattd
Sat Dec 02, 2023 7:23 pm
Forum: Catapult Message Board
Topic: advise on getting more distance
Replies: 5
Views: 22333

Re: advise on getting more distance

ChrisBSR, Yes, throwing arm ratio is typically a design choice and not something you tune with. Decide you want to change the ratio later? Build a new arm. 4:1 and 5:1 are the right range usually, unless you are running well under a 100:1 counterweight:projectile ratio. There's an old rule of thumb ...
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by madmattd
Thu Nov 02, 2023 9:25 pm
Forum: Hurling Events
Topic: 2024 Hurling Events
Replies: 0
Views: 13959

2024 Hurling Events

Year 10! of attempting to catalog a listing of the various hurling events (not limited to pumpkin-throwing, though that does seem to be the vast majority) that are occurring and open to the public to enter. As you hear of other ones with confirmed dates, and preferably a website link too, let me kno...
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by madmattd
Thu Sep 07, 2023 2:02 pm
Forum: Hurling Events
Topic: 2023 Chunkin Events
Replies: 0
Views: 7277

2023 Chunkin Events

Year 9 of attempting to catalog a listing of the various hurling events (not limited to pumpkin-throwing, though that does seem to be the vast majority) that are occurring and open to the public to enter. As you hear of other ones with confirmed dates, and preferably a website link too, let me know ...
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by madmattd
Sat Jul 23, 2022 12:39 pm
Forum: Hurling Events
Topic: 2022 Chunkin Events
Replies: 0
Views: 10646

2022 Chunkin Events

Year 8 of attempting to catalog a listing of the various hurling events (not limited to pumpkin-throwing, though that does seem to be the vast majority) that are occurring and open to the public to enter. As you hear of other ones with confirmed dates, and preferably a website link too, let me know ...
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by madmattd
Sun Oct 18, 2020 12:23 pm
Forum: Hurling Events
Topic: 2021 Chunkin Events
Replies: 0
Views: 11844

2021 Chunkin Events

Year 7 of attempting to catalog a listing of the various hurling events (not limited to pumpkin-throwing, though that does seem to be the vast majority) that are occurring and open to the public to enter. Yes, this thread is starting early as a few events have already announced 2021 dates. As you he...
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by madmattd
Thu Sep 17, 2020 9:15 pm
Forum: Catapult Message Board
Topic: advise on getting more distance
Replies: 5
Views: 22333

Re: advise on getting more distance

Going to need more information to answer for sure. The answer is maybe, but maybe not. 67:1 Mass ratio (counterweight to projectile) is on the low side, so your sling line length might be close. Is 17' the long side or the total length? Some information on both beam lengths (long side and short side...
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by madmattd
Sun Jan 26, 2020 6:55 pm
Forum: Catapult Message Board
Topic: Which trebuchet-type is the best
Replies: 3
Views: 12949

Re: Which trebuchet-type is the best

Thanks for the hints and the reply. We didn't get much of information, so I think the size limitation is for the cocked dimension and the machine should throw an projectile our choice as far as possible. So you say that a HCW or a MURLIN are appropriate? And if the MURLIN is build correctly, does i...
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by madmattd
Sat Jan 25, 2020 12:04 am
Forum: Catapult Message Board
Topic: Which trebuchet-type is the best
Replies: 3
Views: 12949

Re: Which trebuchet-type is the best

Any other requirements/goals? "Best" is pretty subjective, and depends on requirements, goals, etc. Without any experience with trebuchets, a standard HCW (hinged counterweight) is the simplest and easiest to learn how to tune. Whippers are finicky, the walking arm is mainly aimed for an e...
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by madmattd
Wed Jan 22, 2020 4:45 pm
Forum: Hurling Events
Topic: 2020 Chunkin Events
Replies: 0
Views: 12058

2020 Chunkin Events

Here it is, another year of attempting to catalog a listing of the various hurling events (not limited to pumpkin-throwing, though that does seem to be the vast majority) that are occurring and open to the public to enter. As you hear of other ones with confirmed dates, and preferably a website link...