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LAN_403

Conundrum

Sat Oct 18 2014, 03:40PM

Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062

Sounds cool..

I had some fusion ideas, emailed Coherent Scientific and they are interested if I can build a prototype and test it.

EDIT: Also had some ideas about making BiNT (Bismuth nanotubes) using Mg3Bi in a microwave filled with argon and water vapour then mix with UV setting resin and apply UV and HV axially to form the links.
Combined with a pick and place machine this might work out cheaper than silver with a minimal loss of conductivity and possibly even a gain.

hboy007

Thu Mar 26 2015, 10:31PM

Registered Member #1667 Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374

NASA proposes to change the trajectory of an asteroid -

but with gravitational interaction between the object and a space probe that rides parallel to it over a long time. Opportunity, once planned as a 3 month mission is still going, still it feels like a little bit too much effort for the minute interaction that will be established.

Let's assume that the object is icy, we can achieve a not-so-philae-esque landing and collect samples. Add a radioisotope heat source and all the pre-requisites are in place to generate jets from steam / methane / etc. over the course of a few years. Yes, this would be quite a challenge because all the components must function properly for the whole process to continue but we're talking about Newtons of thrust.
(a quick calculation suggests 67p could be moved this way by 4 meters over the course of 3 years.. oh boy).
Need more power? Just wrap the whole darn thing in plastic, let the sun do the melting and create a single directed jet of gasses. Nah, let's not go there

Patrick

Thu Mar 26 2015, 11:26PM

Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639

NASA needs to justify money expended...

Conundrum

Tue Mar 31 2015, 06:35AM

Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4062

What if.. a memory chip can quantum cohere at room temperature if you feed it the right combination of clock and data to form standing waves in the nanometre sized pathways?

Teodor Zafiroski

Tue Mar 31 2015, 02:56PM

Registered Member #48007 Joined: Wed Jun 18 2014, 01:00PM
Location: Prilep, Republic of Macedonia
Posts: 33

What if, you used a microcontroller and a speaker to make a variable distance spark gap, the width of the gap dictates the frequency at which the gap will fire, changing the distance between the electrodes will change the BPS. If we program the microcontroller to change the distance between electrodes with change of input signal frequency, that could audio modulate an SGTC... That would be limited to around several hundred hertz, but, we'd be able to modulate a SGTC... A wild idea that I had for years but never had the time or money to try...

hboy007

Sun Jul 19 2015, 08:33PM

Registered Member #1667 Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374

Sorry, it's me again:

re

if we can have coordinated drone maneuvers / swarm control and self-organisation, why don't we develop "flying fire hoses" with drones that attach to the hose and are powered by a high voltage backbone + DC/DC for each drone?

Wouldn't that be a natural conclusion? People could even donate the equivalent of a drone for the system and then see where "their" drone is an active helper for the fire fighters. Plus no pilots in the air have to fly dangerous maneuvers.

hen918

Sun Jul 19 2015, 08:57PM

Registered Member #11591 Joined: Wed Mar 20 2013, 08:20PM
Location: UK
Posts: 556

hboy007 wrote ...

Sorry, it's me again:

re

These drones would have to be massive (and cost lots of money) to lift a fire hose. Do you know how much those things kick?

Dr. Slack

Sun Jul 19 2015, 09:12PM

Registered Member #72 Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659

As we know how much fire hoses kick, and have seen people carried aloft by them as a sport

, it appears that having a drone thingy to lift it is not necessary, just have the hose lift itself. The water will not go on the fire until it has manourvered to the correct position, and that position may involve getting the hose across the fire, so it may restrict the launch position.

hboy007

Sun Jul 19 2015, 09:13PM

Registered Member #1667 Joined: Sat Aug 30 2008, 09:57PM
Location:
Posts: 374

people get 2-5kg lift capacity with hexacopters and you'd only need a small battery pack which would be sufficient for a 2" hose filled with water if you'd put one drone per meter. The question that remains is: what is cheaper: 200m of drone hose or one helicopter? The break-even should be somewhere in the region of 100-500m? It's been a while since I last bought helicopters, I might not be up to date

If we're still in at that price point: what is a feasible action radius in that sort of terrain and how could one work around the arising limitations?

@Dr. Slack: right, I had not considered the "boundary condition" of the hose. With a stiffer end segment or wrapping made of electro-stiffening polymer

we might be up to something. Suitably distributed water thrusters along the hose might also help - however I still think you'd need drones for the maneuverability so the hose can enter the scene from above.

The fire engine power on the ground is a different story altogether. Maybe someone can fill me in.

Ash Small

Mon Jul 20 2015, 12:53PM

Registered Member #3414 Joined: Sun Nov 14 2010, 05:05PM
Location: UK
Posts: 4245

Wouldn't 'wheeled drone fire trucks' be a simpler, more effective solution?

Maybe the three water cannon purchased by Boris Johnson to use against the people of London would be better used by converting them to RC, and using them to fight fires?

You could use drones for reconnisance and for directing the jets of water.

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