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Nephew Project Completed [Archive] - StangBangerz Forums
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TZ250
10-20-2007, 11:52 PM
We (I) completed the catapult today. It took me about 3.5 hours. The nephews shot it about 200 times in 1.5 hours!

It will throw a small foam soccer ball about 60 ft. I'll make a couple of changes to improve the performance.

The spring came from a clay pigeon thrower. A stronger spring would certainly help. The cup on the arm is from an old weedeater. To get more tension, I improvised by using a 19mm socket as a spacer.

The pivot for the arm is a titanium axle that I made for a former racebike. (It was totalled at Road Atlanta)

It is 4 ft. long. The arm is 5 ft. long.

It's rough, but functional. The boys learned a lot today, including some safety tips and running a bandsaw.

http://i122.photobucket.com/albums/o267/TZ250_Fanatic/2007_1020Image0081C.jpg

http://i122.photobucket.com/albums/o267/TZ250_Fanatic/2007_1020Image0082C.jpg
PonymanfiveO
10-21-2007, 12:24 AM
lol too cool!!!
mach_u
10-21-2007, 01:06 PM
haha! That's awesome. I'd love to build one and launch things from behind my privacy fence on to Beechmont Ave. :lol:
theyallslow
10-21-2007, 01:29 PM
how well dose it work?
jaystang44
10-21-2007, 11:02 PM
VIDEO please!!!!!!!!!!!
TZ250
10-21-2007, 11:38 PM
I'll ask my brother-in-law for permission before posting a video.

It was fun watching the boys play with it. They were throwing balls from the catapult and taking turns catching them. My niece thought that it was neat, then walked away to play with dolls... :lol:

There will be more improvements in the near future. I'm limited by the spring, but I used things from around the house.

So far, I have $14 in the catapult. (not counting the custom made titanium axle! :D)
Stang849
10-23-2007, 08:33 AM
haha! That's awesome. I'd love to build one and launch things from behind my privacy fence on to Beechmont Ave. :lol:

Note to self, watch for flying things when passing AJ's house :D:D
Gene
10-23-2007, 11:35 AM
Heh. Awesome.

Next you should make a Trebuchet.

http://forums.corner-carvers.com/showthread.php?t=20237&highlight=trebuchet
TZ250
10-23-2007, 05:29 PM
Heh. Awesome.

Next you should make a Trebuchet.


Gene, my next project will be a trebuchet. I thought about building one for my nephews, but there wasn't enough time.

Thanks for the cool link.
Black92LX
10-24-2007, 03:54 AM
you're on sigforum!!!!!!!!!!!!!!!