96Views3Replies

Author Options:

Spider Man Web Slingers Idea Answered

this is the first idea that I have worked up the courage to post and I would like some help getting my ducks in a row.

I don't have anything written down yet so here is a verbal breakdown of its function:

A retractable tape measure mechanism is attached to a length of cord.
This mechanism is, in turn, placed in a sealed chamber with a barrel wide enough to
accommodate smooth movement of the cord.

The free end of the chord is attached to a dart/wadding that is used to block the chamber from
the outside.

Pressurized CO2 or equivalent gas is pumped into the chamber using a pressure nozzle with a emergency release valve.

CO2 is pumped into the chamber, dart/wadding is fired, dart/wadding and cord pass through the barrel till loss of velocity or reaching
the end of the chord, the mechanism pulls the cord and dart/wadding back to start and the process repeats.

this is just an idea and I would like some help getting it functional, and an equation for thrust vs drag would be nice :D

Comments

The forums are retiring in 2021 and are now closed for new topics and comments.
0
Toga_Dan
Toga_Dan

7 years ago

https://www.instructables.com/id/HarpoonGrappling-Hook-Gun/

0
Toga_Dan
Toga_Dan

7 years ago

you probably want VERY little resistance on the cord while it is spooling out.

I'm not sure if the pics convey my line handling design well, but look at my harpoon -ible for 1 way to handle line.

If you view vid in my "monkey hunter" -ible, you can see line launched about 40 feet in the air. projectile=water filled tennis ball. line= 550 cord. deployment technique=line laid out loosely on ground.

I've also seen line spooled off of a tube mounted on a bow. This is similar to how line comes off a fishing reel.

0
caitlinsdad
caitlinsdad

7 years ago

If you want the line to be external, look up designs for your whale harpoon gun. If you want the line to be internal look up designs for a TOW missile. I guess a window shade mechanism would work to retract the line.