That is probably a good idea Onno. >From stories I've heard about heavy construction and mining equipment it would seem to match.
A few years ago machine operator (I believe in California) got disgruntled with his employers and got into a large Wheel Loader and started tearing the work sight apart. Damaging and destroying buildings, chasing and crushing his boss, and generally being a very very dangerous threat to the area. The local police showed up and tried to stop him with their side arms, but the combination of range and cab prevented them from stopping him. The story went that the police ended up using an unspecified "high power rifle" ( I assume it was actually a .223 or .30-06) to kill the operator. I have also personally seen a few roll over tests on medium sized construction/mining equipment and was surprised by the amount of protection the roll over protection offered. I also watched some fairly big rocks fall on and bounce off of cabs (not 25 ton ones but pretty big none the less - maybe half a ton). I have also heard the old war stories from test engineers who had large rocks or trees hit the cab. So I know these things do happen today and people usually don't get more than banged around in the cab. So 5 or 6 DR should be enough to stop a 9mm pistol round outside its half damage range most of the time. With significantly more open frame armor ( I don't know how many HP a 1/2 ton chunk of stone has, but could probably guess its velocity after falling 20 or 30 feet - call it maybe 1hp/10 lbs and 15 yards per second velocity so that would be 15d damage or around 50 points of damage) for the big rocks and roll overs. The rest would go to hp for the vehicle but I would be very worried about the airtight seal. Is there some way to just add armor to the cab or to reseal any breach? No one wants a slow leak to a chlorine rich atmosphere. Thanks, Clint "Onno Meyer" <[EMAIL PROTECTED]> Sent by: [EMAIL PROTECTED] 04/27/2007 11:33 AM Please respond to The GURPSnet mailing list <[email protected]> To The GURPSnet mailing list <[email protected]> cc Subject Re: [gurps] [VEHICLE] of the week 652 ? SpinDevCorp OmniMover Caterpillar: Confidential Green Retain Until: 05/27/2007 Retention Category: G90 - General Matters/Administration > > Whatever the application I would put some more top armor on it. Roll > > overs and large falling rocks are very serious to vehicles doing this > kind > > of work and get special attention. And the last thing the operator is > > going to want is a 25 ton rock punching a hole through his seal. > > No sane amount of DR will resist a 25-ton rock. It will have to take > the hit on HPs. On second thoughts, the realistic way might be a mix of regular armor, open-frame armor and massive HPs - a rifle bullet would penetrate the thin regular armor unless the driver gets lucky and a beam catches it, medium rocks bounce from the open-frame armor and really big rocks warp the frame a bit. Onno _______________________________________________ GurpsNet-L mailing list <[email protected]> http://mail.sjgames.com/mailman/listinfo/gurpsnet-l _______________________________________________ GurpsNet-L mailing list <[email protected]> http://mail.sjgames.com/mailman/listinfo/gurpsnet-l
