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Don Y <blockedofcourse@foo.invalid> wrote:You don't care if the projectile FLOATS to the destination.On 11/21/2024 5:52 PM, bp@www.zefox.net wrote:Per projectile? All the same? Are they fragile? Same aerodynamics,Don Y <blockedofcourse@foo.invalid> wrote:>>>
Ideally, I would like the mass to STOP at the destination (not bounce
or roll away) but that's a secondary goal.
Apologies if I missed it, but what are the masses and accelerations in play?
The masses are negotiable. As is the acceleration (as long as you
can overcome gravity).
>
or variable? Grams per cc, or cc's per gram?
Landing speed depends on what the projectile is made of.The goal is to PLACE a "thing" (projectile) at a specific locationWhat's the permissible error in position and landing speed?
relative to the launcher. And, to have it reach that location
with minimal interaction with anything located between the launcher
and destination.
Yes. Or, any launch mechanism that goes UP before OVER.E.g., If something was located immediately adjacent to the>
launcher, the projectile's path should go OVER the obstacle
and not expect to be able to pass THROUGH it.
That's a mortar or howitzer.
No. But, the design choice should have tolerance for smallImagine using a nerf gun to lob those little sponge ballsNow you're talking projectiles dominated by aerodynamic drag.
up, over obstacles -- but, being able to precisely control
the range so they land where planned (no farther nor shorter)
Does your launcher need to take air movement into account?
Overkill as it doesn't need to be that portable.But, to do so completely under automation, without any humanAre you thinking of something like
intervention.
https://en.wikipedia.org/wiki/Girardoni_air_rifle
?
One could build a version to launch Nerf balls. Note that itThe point is finding the right combination of mechanism
used a hammer to operate the gas valve and compensate at least
partly for pressure changes. You'd want a very low pressure
for 20 feet. Perhaps you want a toned-down potato cannon (I
think that was mentioned previously by someone).
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