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Search: Posts Made By: JoergS
Forum: General Slingshot Discussions 10-16-2017, 05:16 AM
Replies: 13
Views: 201
Posted By JoergS
https://www.amazon.de/Proxxon-28092-2-Gang-Dekupie...

https://www.amazon.de/Proxxon-28092-2-Gang-Dekupiers%C3%A4ge-DSH/dp/B0017V817A/ref=sr_1_4?ie=UTF8&qid=1508130900&sr=8-4&keywords=Proxxon+S%C3%A4ge
Forum: General Slingshot Discussions 10-15-2017, 05:35 AM
Replies: 13
Views: 201
Posted By JoergS
I have both and I much prefer my scroll saw. It...

I have both and I much prefer my scroll saw. It allows me to do very tight curves and it cuts with extreme precision. Exchanging saw blades is easy and cheap. On the band saw, exchanging blades is a...
Forum: General Slingshot Discussions 10-09-2017, 05:09 PM
Replies: 5
Views: 272
Posted By JoergS
Several possible reasons. Do you have some pics...

Several possible reasons. Do you have some pics of the thing?

People tend to forget that even though you have a hand brace, you still have to hold on to the slingshot as hard as you can. It isn't...
Forum: Das Deutsche Schleuderforum 10-09-2017, 05:07 PM
Replies: 5
Views: 237
Posted By JoergS
https://www.youtube.com/watch?v=1ixrgbvJU1g

https://www.youtube.com/watch?v=1ixrgbvJU1g
Forum: Off Topic 09-29-2017, 05:47 AM
Replies: 12
Views: 240
Posted By JoergS
It only works with the Cobra Mk2 model, and we...

It only works with the Cobra Mk2 model, and we will sell it as a complete set in order to avoid user frustration. The crossbows are ridiculously cheap and the hand made massive aluminum magazines...
Forum: Off Topic 09-28-2017, 06:19 PM
Replies: 12
Views: 240
Posted By JoergS
I will very soon release the magazine for the...

I will very soon release the magazine for the Cobra as a product people can order from the store. If you aren't happy with the power, you can install the prod of a HoriZone pistol crossbow. Harder to...
Forum: Show off your homemades! 09-25-2017, 06:27 AM
Replies: 2
Views: 243
Posted By JoergS
Wow, yours is so much nicer than mine! Good job.

Wow, yours is so much nicer than mine! Good job.
Forum: New project ideas 09-16-2017, 08:11 AM
Replies: 11
Views: 454
Posted By JoergS
Accuracy would also be very poor. The push rod...

Accuracy would also be very poor. The push rod would have to be rather flimsy or else it would weigh even more. It will bend and wobble like an eel in a water barrel.
Forum: New project ideas 09-16-2017, 07:36 AM
Replies: 2
Views: 137
Posted By JoergS
I do think such cartridges could be done and in...

I do think such cartridges could be done and in fact would be interesting. But I lack the equipment and skills to make those. Keep in mind they need to be airtight at 300 bar.

I once suggested...
Forum: Das Deutsche Schleuderforum 09-15-2017, 10:00 AM
Replies: 20
Views: 1,053
Posted By JoergS
Loses Pulver... das fällt unter das...

Loses Pulver... das fällt unter das Sprengstoffgesetz. Darf nur an berechtigte Personen abgegeben werden.

Wie gesagt, es muss eine EIGENE Munition entwickelt werden. Diese muss dann durch einen...
Forum: Das Deutsche Schleuderforum 09-15-2017, 04:16 AM
Replies: 20
Views: 1,053
Posted By JoergS
Das mit dem pyrotechnischen Antrieb geht schon....

Das mit dem pyrotechnischen Antrieb geht schon. Meine 1000-Joule-Pfeilwerfer nutzen gerade einmal 30 Liter Luft, komprimiert auf 100 Kubikzentimeter. So ein Airbag hat ca. 60 Liter Volumen und steht...
Forum: New project ideas 09-14-2017, 07:09 AM
Replies: 11
Views: 454
Posted By JoergS
A wad that is accelerated at first and then...

A wad that is accelerated at first and then stopped again? Energy transfer? Sorry to say, but that is not a good idea. You are wasting precious energy. Stopping a wad that travels at 140 m/s is crazy...
Forum: New project ideas 09-13-2017, 07:21 AM
Replies: 11
Views: 365
Posted By JoergS
My experience is that you can simply exchange...

My experience is that you can simply exchange draw weight and draw length. In other words, it is the MASS of rubber and the factor of the stretching that counts.

So my huge cannon (that will air...
Forum: Das Deutsche Schleuderforum 09-13-2017, 07:04 AM
Replies: 10
Views: 399
Posted By JoergS
Nicht vergessen: Beim Filmdreh ist ein starker...

Nicht vergessen: Beim Filmdreh ist ein starker Schuss das letzte, was man haben will.

Ziel: Es soll ein Pfeil austreten, aber am besten sofort runterfallen.

Denn die computergestützte...
Forum: Das Deutsche Schleuderforum 09-12-2017, 04:43 AM
Replies: 10
Views: 399
Posted By JoergS
It seems to me that the weapon in the picture is...

It seems to me that the weapon in the picture is entirely powered by gravity, much like the "dwarven cart repeating crossbow".
...
Forum: New project ideas 09-12-2017, 04:26 AM
Replies: 11
Views: 365
Posted By JoergS
I don't like chained bands much because of the...

I don't like chained bands much because of the fact that these rings break easily and it is almost impossible to fix that. The rubber used in such rings is much inferior to Thera Band, which can be...
Forum: New project ideas 09-10-2017, 11:27 AM
Replies: 11
Views: 454
Posted By JoergS
Unfortunately the fact that there is some air...

Unfortunately the fact that there is some air left in the arrow is already counted into my calculation - I compare the energy that goes in with the energy that goes out, based on field data. If you...
Forum: New project ideas 09-10-2017, 06:28 AM
Replies: 11
Views: 454
Posted By JoergS
If you want to achieve that kind of energy (and...

If you want to achieve that kind of energy (and speed of course) with 300 bar and over-the-barrel projectiles, you will very soon run into all kinds of problems.

You need a super long barrel, but...
Forum: Das Deutsche Schleuderforum 09-08-2017, 10:22 AM
Replies: 20
Views: 1,053
Posted By JoergS
Der Innendurchmesser meiner Pfeile beträgt...

Der Innendurchmesser meiner Pfeile beträgt allerdings 15 mm, nicht 10mm... ich habe mich in der Tat um den Faktor 9 komma irgendwas vertan (weil 1N nunmal nicht 1kg ist). Aber 500 kilo sind locker...
Forum: Das Deutsche Schleuderforum 09-06-2017, 09:52 PM
Replies: 20
Views: 1,053
Posted By JoergS
Doch. Das ist das Problem. Die Fläche ist...

Doch. Das ist das Problem. Die Fläche ist entscheidend.
Forum: Das Deutsche Schleuderforum 09-05-2017, 08:21 PM
Replies: 20
Views: 1,053
Posted By JoergS
Das kannst Du leider vergessen. Das wäre ja...

Das kannst Du leider vergessen. Das wäre ja nichts anderes als ein Pneumatikzylinder mit 300 bar... die Kräfte, die auftreten, sind enorm. Schon bei 10 bar bist Du bei fast 300 kilo Druck. Bei 300...
Forum: Show off your homemades! 08-29-2017, 05:38 AM
Replies: 30
Views: 7,737
Posted By JoergS
I have my doubts that the spring design works...

I have my doubts that the spring design works here, too. First it seems that you can't even open the latch with springs like that. Then, the springs are much shorter here due to the shorter arrows,...
Forum: Welcome & Introductions 08-27-2017, 12:08 PM
Replies: 7
Views: 196
Posted By JoergS
I have no plans, and I threw away that weapon...

I have no plans, and I threw away that weapon together with about two hundred other things from older projects a few weeks ago (needed the space). Was a fun little shooter really.
Forum: Das Deutsche Schleuderforum 08-26-2017, 06:44 AM
Replies: 6
Views: 249
Posted By JoergS
Waffenrechtlich spricht nichts dagegen. Aber es...

Waffenrechtlich spricht nichts dagegen. Aber es gilt ja auch noch das bürgerliche Gesetzbuch (BGB). Deine Geschosse werden das Gelände höchstwahrscheinlich beschädigen, egal wie geringfügig. Deshalb...
Forum: Das Deutsche Schleuderforum 08-25-2017, 06:25 AM
Replies: 6
Views: 249
Posted By JoergS
Das ist eine nicht so ganz triviale Frage. ...

Das ist eine nicht so ganz triviale Frage.

Man muss unterscheiden.

Pfeilgewehre, bei denen der Pfeil ÜBER den Lauf gleitet, sind laut BKA-Feststellungsbescheid gar keine Waffen im Sinne des...
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