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From: Don Y <blockedofcourse@foo.invalid>
Newsgroups: sci.electronics.design
Subject: Re: OT: Repeatably lobbing "projectiles"
Date: Tue, 26 Nov 2024 02:37:24 -0700
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On 11/23/2024 6:20 PM, Don Y wrote:
> What if I do this mechanism BACKWARDS?
> 
> I.e., use a spring in extension mode.  Let the "carriage" STRETCH
> it to a desired length (storing energy).  HOLD the "free" end of
> the spring in place ELECTROMAGNETICALLY (!).

THIS is the solution!  One can purchase electromagnets that can
hold 40+ pounds (some operating at up to 100 pounds) for ~$75 (QTY1)
and operate them from a 24V supply with << 1A.

This has got to be the easiest way to avoid the mechanical mess
that comes with other "launch" schemes!

I will place an order after the holidays.  No idea what lead
times will be.

Maybe I can replace the spring with something else, at the same
time.  If the release/catch issue is out of the way the rest
should be easy!