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Path: ...!eternal-september.org!feeder2.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Don Y <blockedofcourse@foo.invalid> Newsgroups: sci.electronics.design Subject: Re: OT: Repeatably lobbing "projectiles" Date: Thu, 21 Nov 2024 21:46:03 -0700 Organization: A noiseless patient Spider Lines: 28 Message-ID: <vhp2aj$11smk$4@dont-email.me> References: <vhmm2k$hpg1$1@dont-email.me> <cmpujjhu3r4jprrarl8ajrokrrn2igh5q8@4ax.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Fri, 22 Nov 2024 05:46:11 +0100 (CET) Injection-Info: dont-email.me; posting-host="1378a24f9a90252c3cd9b8e48690e2d3"; logging-data="1110740"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19cg4hheSk6wnxBdaksWXg7" User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.2.2 Cancel-Lock: sha1:PTlA4+X5iwciZ0jAlJATVOZ2CnI= Content-Language: en-US In-Reply-To: <cmpujjhu3r4jprrarl8ajrokrrn2igh5q8@4ax.com> Bytes: 2038 On 11/21/2024 10:03 AM, legg wrote: > Boring, but think 'sling'. david and Goliath etc. > > Rotating arm, center-fed ~ counterbalanced. > > axle tilt, fixed length arm (rpm), angle of release, That could work. Loading the projectile (likely something symmetric for such a launcher -- like a ball) would just require the pocket of the sling be in a particular place at loading time. The sling need not be flexible (like a historical sling) so this could be ensured relatively easily. Unlike the "single shot" mechanisms discussed, so far, one could "wind up" the mechanism and release when the proper "tangent velocity" was attained. But, would the release mechanism be any less prone to the sorts of problems my "cocked spring" exhibited? Perhaps the centrifugal force could be exploited to facilitate the projectile getting away from the "catch"? > Golfers would go for it. > > RL