Monday, September 26, 2011

Lots of shooting, slingshots and cats

A new video is online!

This time, the pulley based draw length extension employed by the Bullpup Sling-X-Bow has been brought over to a conventional slingshot. 32 cm (13") of additional acceleration make this camo painted huge frame a true performer.

Both weapons are shot through the chrony, and the crossbow won by only a few percent.

The original design is from Mr. Robert Blair, it is called the "ComBow". The Slingshot Channel converted Mr. Blair's invention for the much faster flatbands, and also for the far more powerful "butterfly" shooting style. The result is a stronger slingshot, but it is also pretty bulky.

The video shows to more frames carved from dogwood, and a hand protection "glove". The slingshots are all used against a 75% empty 5 liter beer barrel. The beer was no longer drinkable, but good enough for the slomo cam to take some nice shots.

22 comments:

  1. you have to go back and do more slow-mo destruction it was very entertaining watching something get crushed by a lead ball.

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  2. Hallo Jörg,
    wie immer ein TOP Video. Das Teil Butterfly aufzuziehen ....Alle Achtung. Dicke Arme. Wieviel Lagen hast Du denn da benutzt?
    Ich plane gerade einen Slingbow nach deinem Muster aus Metall zu bauen. So richtig Heavy Metal. Mal sehen, wie es wird.
    Viele Grüße aus dem Hunsrück

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  3. I am impressed that your com bow shot almost as fast as the bull-pup. This experiment has inspired me to make my own com bow. It also seems that the com bow style would be easier to build. Have you ever tried shooting steel cubes. I have cut small steel cubes off of a 1/2" square steel bar. It really cuts the sheet metal well. I shot one right though both sides of my sheet metal building. Oops!

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  4. wow... wirklich tolles Video! Die Zeitlupe macht erst deutlich vielviel Power wirklich hinter den Kugeln steckt.

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  5. The bull-pup design is top of my slingshot to do list.I can't wait to free up some time to make one.

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  6. Joerg, if the bullpup had only two bands per side, the longer 'butterfly' rubber of the 'combow' would have been more powerful than the short bands of the bullpup, corrrect? Then to increase the power of the bull pup, would it not make sense to move back the anchor point of the rubber to make for a longer length or do the rollers rob more energy as they roll more to accommodate the longer rubber? I wish I had the time to make this test myself, but I don't so I have to bother you with the questions.

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  7. ToshTogo, you can not keep the rubber under tension for a longer time without loosing most, if not all of the power. The bands on both the bullpup and the combow are not pretensed, just enough to stay on the rollers.

    Draw length and rubber thickness are almost linear. Twice the drawlength means you can get the same results than using twice the rubber thickness.

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  8. Your cats in the videos are stars,too.They are resistent against the impact noise from a slingshot,i think.
    LOL.
    Armin

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  9. This was a good video. I LOVE that bullpup slingshot crossbow!!

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  10. I love the theory with the ballbearings to increase the length, really cool.

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  11. Thanks Joerg like your carved frames.

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  12. I have seen you say that keeping the rubber under tension will make them lose most power several times , and offcourse i believe you know. But howlong are does that mean, for example : 5 minutes , 10 ?? Just wanna know so if a burgler gets in , when do i load the assault slingshot ;)

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  13. Very interesting stuff.
    Cat seems slightly suicidal.

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  14. would like to see another video on ammunition, using the aforementioned cube style in different sizes, mayhaps get some ballistics gelatin and look at the terminal ballistics of the various rounds

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  15. Josef,
    What the hell ! Just unbelievable trying to keep up with the designs. Just wonderful. Keep up the good work. Thanks for all the ideas.
    Jim k (rev Shnorr)

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  16. Respekt vor der Handwerkskunst, ja das ist echte Kunst!!! Mach weiter so! Kepp up the good work.

    Grüße aus Hamburg

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  17. keep meinte ich natürlich

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  18. This comment has been removed by the author.

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