A sledgehammer is operated by swinging it through about a 250 degree = arc, presumably by a muscular associate. If you were to replace it with a = weight drop, you would need to drop it many meters to approximate this amount = of energy. Thus, your weight needs to be accelerated somehow. There are = units that attach to vehicles with large rubber bands. They are cocked by electric or hydraulic devices. See photos on http://www.giscogeo.com/pages/giscosei.html=20 =20 We would like to make a significant improvement in energy output. You = could make a better hammer and plate, but probably not twice as good. =20 I have considered flywheel operated devices. You could spin up a = flywheel with a battery operated drill and then couple the energy into the ground somehow, though there are strange forces going in strange directions = when you suddenly stop a spinning flywheel. =20 Doug Crice http://www.geostuff.com Wireless Seismic http://www.wirelessSeismic.com 12996 Somerset Drive phone 1-530-274-4445 Grass Valley, CA 95945 USA fax 1-530-274-4446 =20 -----Original Message----- From: psn-l-request@.............. [mailto:psn-l-request@............... = On Behalf Of ChrisAtUpw@....... Sent: Thursday, July 21, 2005 4:22 PM To: psn-l@.............. Subject: Re: Modified sound card and datalogging and geophones =20 In a message dated 22/07/2005, dcrice@............ writes: 7) And last but not least, it needs to work better than a sledgehammer = used with a seismograph that can stack multiple impacts. Hi Doug, =20 This may be a bit ''off the wall'', but there is another way of = looking at the problem.=20 =20 Can we design a better type of sledge hammer + plate / falling = weight?=20 =20 Regards, =20 Chris ChapmanA sledgehammer = is operated by swinging it through about a 250 degree arc, presumably by a muscular associate. If you were to replace it with a weight drop, = you would need to drop it many meters to approximate this amount of energy. = Thus, your weight needs to be accelerated somehow. There are units that = attach to vehicles with large rubber bands. They are cocked by electric = or hydraulic devices. See photos on http://www.giscogeo.= com/pages/giscosei.html
We would like to make a significant = improvement in energy output. You could make a better hammer and plate, but = probably not twice = as good.
I have considered flywheel = operated devices. You could spin up a flywheel with a battery operated drill and = then couple the energy into the ground somehow, though there are strange = forces going in strange directions when you suddenly stop a spinning = flywheel.
Doug Crice  = ; http://www.geostuff.com
Wireless Seismic = http://www.wirelessSeismic.com
12996 Somerset Drive &n= bsp; phone 1-530-274-4445
Grass Valley, CA = 95945 USA fax 1-530-274-4446
-----Original = Message-----
From: = psn-l-request@.............. [mailto:psn-l-request@............... On Behalf Of ChrisAtUpw@.......
Sent: Thursday, July 21, = 2005 4:22 PM
To: = psn-l@..............
Subject: Re: Modified = sound card and datalogging and geophones
In a message dated 22/07/2005, dcrice@............ writes:
7) And last but not least, it needs to work better than a sledgehammer used
with a seismograph that can stack multiple impacts.Hi = Doug,
&nbs= p; This may be a bit ''off the wall'', but there is another way of looking at = the problem.
&nbs= p; Can we design a better type of sledge hammer + plate / falling weight? =
&nbs= p; Regards,
&nbs= p; Chris Chapman