Electronics > Projects, Designs, and Technical Stuff

Everything wrong with amateur railguns and how to make them better

<< < (3/8) > >>

i_am_fubar:
I wonder how much that cable bundle twitches when It fires. Serious current there. How much you figure? 10s of kA?

I wanted a rude username:

--- Quote ---The United States Naval Surface Warfare Center Dahlgren Division demonstrated an 8 MJ railgun firing 3.2 kg (7.1 lb) projectiles in October 2006 as a prototype of a 64 MJ weapon to be deployed aboard Navy warships. The main problem the U.S. Navy has had with implementing a railgun cannon system is that the guns wear out due to the immense pressures, stresses and heat that are generated by the millions of amperes of current necessary to fire projectiles with megajoules of energy.

--- End quote ---

(Emphasis added)

Psi:

--- Quote from: i_am_fubar on December 27, 2019, 08:25:06 am ---I wonder how much that cable bundle twitches when It fires. Serious current there. How much you figure? 10s of kA?

--- End quote ---

See for yourself
https://youtu.be/eiUDdAGCht0?t=14

tautech:

--- Quote from: Psi on December 27, 2019, 08:41:48 am ---
--- Quote from: i_am_fubar on December 27, 2019, 08:25:06 am ---I wonder how much that cable bundle twitches when It fires. Serious current there. How much you figure? 10s of kA?

--- End quote ---

See for yourself
https://youtu.be/eiUDdAGCht0?t=14

--- End quote ---
Following on from that a news item on the commissioned rail gun:

mzzj:

--- Quote from: Honda Rider 271 on December 27, 2019, 01:02:34 am ---
1) Amateur projectiles (the armature and anything it drives) are too massive for the small electrical energy levels involved. Kinetic energy is .5MV^2 so other things equal reducing the projectile mass by a factor of 10 should increase kinetic energy by a factor of 10 even after accounting for new 90% smaller mass. Miniaturizing the projectile to a reasonable mass (<10g) might include conductivity and or thermal problems reducing the theoretical energy gain. The small scale high velocity laboratory railguns I've found in academic research all shoot extremely low mass projectiles.

--- End quote ---
Where the f** did you get this idea from?



Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod