Dope Tech Episode 2

<<@KK12312-e says : If you use a super recurve design, you could reduce width of limbs and make it more compact>> <<@Not_Evil_ says : Ravin R18 Joerg Edition>> <<@R.Satzmann says : Besser wäre doch, keine runde Scheibe zu verwenden, über die die Wurfarme gespannt werden, sondern eine exzentrische wie bei den Compoundbögen, oder? Dazu eine im Winkel verstellbare Halterung der Wurfarme, um die Auszugsgewichte anpassen zu können (bspw. für unterschiedliche Bolzengrößen).>> <<@julianschafer6890 says : Schau dir mal Van Helsing an. Da gibt es in der Eröffnungsszene eine lustige Automatische Armbrust. Das wäre doch mal ein bastel Projekt.>> <<@drsatan3231 says : This will be cool to see once you're finished tinkering with the design Could you make your own version of the RX-7 Doomsday pump action but as long as a rifle and from wood instead? More power and bigger BALLS! Longer barrel means MORE BALLS!>> <<@BroodyGeckosZeughaus says : This stuff is exactly what i like about this channel. Haven't watched in a while, because the presentation of that looter self- defense video really didn't sit well with me and i'm not that into knives. Good to see you're still having fun building crossbows in your shed. 👍>> <<@Dinoslay says : There is potential to turn the loading process into a pump action mechanism.>> <<@cheadabob says : German engineering at its finest 👌>> <<@SilentWayfarer says : I'm sure you know what you're doing but seeing you slide the bolt in from the front made me wince. If there had been a misfire it would have perforated your hand/wrist. Maybe some kind of top/side/bottom load function?>> <<@aurigo_tech says : Na, dieses Wellrad-Prinzip, das kommt mir doch bekannt vor.. Sinnvoll wäre es das Rad komplett zu nutzen, also eine komplette Umdrehung. Dann kann es auch kleiner und damit leichter werden als das was du jetzt hier hast. Die einzige Möglichkeit die ich gefunden hatte um die Sehne davon abzuhalten vom Rad zu springen, sind eng anliegende String-Stopper vorne.>> <<@petrsedlak7874 says : Please make more videos like this. I miss the old days, when you were creating those crazy (but interesting and funny) inventions, crossbows etc 🙂>> <<@10llansford says : would this be considered a bulpup crossbow?>> <<@Heddanofarsan says : Maybe that loading/ pushing can be done with a goats foot.>> <<@Jaxakai says : This got my creative juices flowing. What if you tried "gearing" crossbows? Like you did here, but maybe with multiple adjustment stages, like a bike. The highest torque stage could shoot heavier bolts, and lower torque would shoot light bolts stupid fast.>> <<@MadMaxWiseEx says : Работа плечей в этой плоскости будет приводить к уводу с линии прицеливания в момент выстрела.>> <<@jayess7177 says : how about a single sided crossbow? would that even be a thing?>> <<@crozraven says : I think the spring system is too complicated, therefore it has significant friction & reduction in power.>> <<@liamhenry3010 says : Just spitballing some ideas. If you're going for a compact design Is it worth using the siege 300 throwing arm as the basis? seems rather compact for its power If so is it possible to reverse draw it by swapping and inverting the cams? Would take a few inches off the front.>> <<@samuelmendoza9356 says : Would be cool if you install Da Vinci's _Balestro Veloce_ integrated crossbow spanning device. Looks like it can still have the space for such.>> <<@christiankuwetter7593 says : Als Franke fühle ich mich angegriffen! Ne mal im ernst. Die Masse der Räder frisst viel Energie beim beschleunigen. Das wirkt wir Bleigewichte and den Wurfarmspitzen.>> <<@jonnes__4657 says : 🗽Jörg, you should feed the bolt between your index finger and thumb so that a faulty release does not pierce your hand. 😅 .>> <<@Ist_Geheim says : Hallo Jörg, interessant wäre ein Franken-Crossbow mit Magazin bei dem man seinen (bereits vorhandenen) Akku-Schrauber "einbauen" kann (vielleicht als "Vordergriff", wenn das mit dem Schwerpunkt dann noch passt?). Der Akku-Schrauber sollte dann den Spannmechanismus übernehmen und "SV-fähige" Zuggewichte in einer bis höchstens zwei Sekunden spannen. Das Preissegment sollte im Bereich der Adder liegen, also mehr massentauglich. Ggf. auch die Bolzen der Adder nutzen, das macht es für alle bisherigen Adder-Kunden attraktiver. Was hälst du davon?>> <<@ekothesilent9456 says : I’m so sad about what YouTube did to your channel…. Might be worth making a new account at this point joerg :(>> <<@marcusinfestus1333 says : How about "cool crap"? Lol everything has to start somewhere; I think this is going somewhere. (I might be biased; I drew up something similar in jr. High and everyone thought I was nuts)>> <<@Der_Saftsack says : Nicht... vor deinen eigenen Bogen treten. Sonst triffst du deinen Vater, deine Mutter, deine Schwestern und deine Brüder. Dort treffst du dann all jene Menschen deiner Ahnenreihe, von Beginn an. Also bitte, immer Vorsicht.>> <<@bradbrandon2506 says : Oh that is just so cool! How you keep coming up with these things time and time again, Joerg is really amazing and I am glad that I have been following and subscribed to you all these years.>> <<@Exodus153KJV says : Do it with one limb..>> <<@RodrigoFernandez-td9uk says : I'm sure there are safer ways to load it.>> <<@michaelwegener533 says : Hallo gibt es diesen Kanal auch auf Deutsch?>> <<@paradisestrong7711 says : Ok, I have a wild idea for a slingshot: a crabbing ring launcher for crabbing fishing. Has to slingshot with distance and rotation.>> <<@Arrowrude says : wann kommen updates zur mei interceptor ?>> <<@edgarburlyman738 says : Joerg you should make an all wood and sinew compound bow. I've seen one before, somewhere on the internet.>> <<@KrimitWARFRAME says : new instant legolas?>> <<@bertjesklotepino says : What about a flywheelbow? You have a flywheel spin at nice RPM and have some trigger mechanism feed in the arrow or bolt? Yeah, it aint a bow anymore, true.>> <<@kkuenzel56 says : Typical fine German engineering!>> <<@MrJonathandowns says : How does it work with the aim being thrown either up or down by the bow limbs kicking?>> <<@axistec says : Interesting, but very challengeful. Weigh, safety for loading, wear on string, etc.>> <<@Mr.Brightside1564 says : Very Cool idea and design. My only question is why do you have the limbs facing back towards the shooter wouldn't it be safer to flip them facing away and so that the energy is traveling away from the shooter in case of catastrophic failure?>> <<@尸缽疌 says : isn't that just like the no-limb crossbow lancehead f1 you made a video coupe years ago?>> <<@lalotime says : I hope you advance and continue to update designs on your full auto crossbow. Eventually it would be amazing to have a full auto crossbow>> <<@chadjenkins4846 says : How'd you get a bolt thru the center of you hand?>> <<@nuclearmedicineman6270 says : Not sure it's worth it with the losses from the extra complexity. You can get more power out from a simpler system using the same amount of materials. It's like building a car with 10 wheels; it might have better grip, but the weight of the extra wheels, the friction losses.. it adds up to costing more in terms of energy than you gain from it.>> <<@Dorfjunge says : Absolutely love it! Eventhough you shadow-banned me, jörg....>> <<@jakapratama2590 says : What is the pull weight? How much power it generate? Does it comparable to normal tactical? This is a great PoC!>> <<@wilsonarno says : Wonderful concept! I love the compact design! Just an idea from an engineer here, but I hope you consider using a varying radius (ie non-circular geometry) throughout the rotation of the smaller pulley on your design. The force from the springs are not constant throughout their motion, so to optimize the energy transfer, a larger "effective diameter" of the smaller pulley at the beginning and a smaller "effective diameter" towards the end of rotation would be appropriate. This shape could be calculated, or you could take an iterative approach and try out different curves and see what works best. And I think the viewers would like seeing a video where you optimize the design to find the best pulley shape that matches the force distribution of the springs :) Conceptually, the working principle is similar to "bicycle oval chainrings". What do you think? Worth a try?>> <<@sompret says : This really gives me vibes of the Lancehead Torsion crossbow>> <<@gr4p3fruit says : Wenn beide Wurfarme einseitig (oben) sind, verzieht es dann nicht beim Abdrücken nach unten?>> <<@GigliolaCinquetty says : Hey mr. Sprave, ever tought about a bullpup crossbow: the butt of the inverted arms would rest aginst the shoulder...>> <<@Meddlmoe says : This abandons the excellent kinematics of the plain bow: low ratio of arrow displacement vs. Spring displacement at the beginning and nearly infinite ratio short before the release. This means a lot of energy remains as kinetic energy of the mechanism, rather than kinetic energy of the arrow>> <<@Exandria says : PLEASE: use a lever to cock this. This is horrific to watch you charge it.>>