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Old 01-14-2015, 10:28 AM   #23221
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Originally Posted by TurboTim View Post
You all remember this?
How is that even possible?

I mean, seriously, how do you physically construct a crankcase to support a 2 cycle V8?



















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Old 01-14-2015, 11:22 AM   #23222
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How is that even possible?

I mean, seriously, how do you physically construct a crankcase to support a 2 cycle V8?
There must be dividers on the crankshaft between the pin that shared between opposing cylinders. That way the bottom of the cylinder coulf be partially closed off and each cylinder can have its own crank volume.
Either that or the crank does not share a pin between opposing cylinders and they are firing together, but that sounds pretty dumb.

I tried to find a pic using Google-sensei but all I found was this

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Old 01-14-2015, 12:10 PM   #23223
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The intake manifold should be where you'd expect an oil pan to reside.

Holy **** this is awesome:




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Old 01-14-2015, 12:35 PM   #23224
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Originally Posted by TurboTim View Post
You know, I look at things like that and the following thoughts run through my head:

1: Some guy built that in his garage. It clearly has a significant payload-carrying capacity.

2: Lots of people now have access to remotely operated drones with return video feeds.

3: While most such aircraft noted in (2) above are limited in range and duration by the power of their radio transceivers and the capacity of their batteries, an aircraft as noted in (1) above would be capable of carrying powerful radio equipment and large fuel stores. Within reason, its range would be limited only by line-of-sight over the horizon, and even that could be overcome by the placement of the base station in a mobile platform, such as the back of a minivan. With minimal coordination, control could even be passed between multiple base stations en-route.

4: There are people in this world who wish to cause harm to the general populace and sow terror and chaos for a variety of political and social purposes. In general, they are limited by technical means.

5: I see no actual reason why the people noted in (4) above could not take advantage of points 1-3, to create a land-guided cruise missile capable of delivering a very large conventional explosive payload to venues such as the Superbowl, the new-years-eve festivities at Times Square, the World Cup, an Olympic stadium, etc. Casualties would be massive.


Image unrelated:

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Old 01-14-2015, 12:40 PM   #23225
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Joe: what if I told you that for the princely sum of $300 you could buy all the hardware to automate flight control and waypoint following via GPS?

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Old 01-14-2015, 12:47 PM   #23226
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$300? Thats big ballin'. Gotta get those Chinese clones

433Mhz ArduFlyer2.5.2 LEA-6H UAV System with Annunciator


I still dont have GPS on any of my setups. No excuse, just being cheap and stupid.



As for putting your FPV "ground station" in a vehicle. Im pretty sure that is how they pulled off this little stunt.


either that or they have some mountain penetrating radio setup
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Old 01-14-2015, 12:49 PM   #23227
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Originally Posted by Joe Perez View Post
3: While most such aircraft noted in (2) above are limited in range and duration by the power of their radio transceivers and the capacity of their batteries, an aircraft as noted in (1) above would be capable of carrying powerful radio equipment and large fuel stores. Within reason, its range would be limited only by line-of-sight over the horizon, and even that could be overcome by the placement of the base station in a mobile platform, such as the back of a minivan. With minimal coordination, control could even be passed between multiple base stations en-route.
You don't even need one of these Joe:



It's entirely possible (and cheap) to construct a semi-autonomous aircraft and fly it (almost) around the world using satellite based navigation and commands.
Just provide a destination and optional waypoints, it will go there.
Those things can stay aloft for days.
Mind boggling stuff.
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Old 01-14-2015, 12:55 PM   #23228
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Originally Posted by Full_Tilt_Boogie View Post
$300? Thats big ballin'. Gotta get those Chinese clones

433Mhz ArduFlyer2.5.2 LEA-6H UAV System with Annunciator



As for putting your FPV "ground station" in a vehicle. Im pretty sure that is how they pulled off this little stunt.



either that or they have some mountain penetrating radio setup

I still dont have GPS on any of my setups. No excuse.
What can I say, I'm a ***** for 3DR That and I've purchased most of my hardware used/broken and repaired it. I may need to buy one of the rctimer setups for my wooden beater or my Supercub and see what kind of damage I can do.



And yes, you have no excuse for no GPS
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Old 01-14-2015, 02:26 PM   #23229
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Old 01-14-2015, 07:20 PM   #23230
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Neat
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Old 01-14-2015, 10:01 PM   #23231
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Old 01-15-2015, 11:34 AM   #23233
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warning a little graphic since he cant stop running into pedestirans:

[ll]7be_1421205519[/ll]
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Old 01-15-2015, 06:35 PM   #23234
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Quote:
Originally Posted by Joe Perez View Post
You know, I look at things like that and the following thoughts run through my head:

1: Some guy built that in his garage. It clearly has a significant payload-carrying capacity.

2: Lots of people now have access to remotely operated drones with return video feeds.

3: While most such aircraft noted in (2) above are limited in range and duration by the power of their radio transceivers and the capacity of their batteries, an aircraft as noted in (1) above would be capable of carrying powerful radio equipment and large fuel stores. Within reason, its range would be limited only by line-of-sight over the horizon, and even that could be overcome by the placement of the base station in a mobile platform, such as the back of a minivan. With minimal coordination, control could even be passed between multiple base stations en-route.

4: There are people in this world who wish to cause harm to the general populace and sow terror and chaos for a variety of political and social purposes. In general, they are limited by technical means.

5: I see no actual reason why the people noted in (4) above could not take advantage of points 1-3, to create a land-guided cruise missile capable of delivering a very large conventional explosive payload to venues such as the Superbowl, the new-years-eve festivities at Times Square, the World Cup, an Olympic stadium, etc. Casualties would be massive.


Image unrelated:

Fully and semi autonomous drones are already being used to smuggle drugs across the U.S. / Mexico border. The intelligence community is already trying to develop countermeasures associated with future potential MASCAL attempts by fully autonomous drones currently available at consumer price points.
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Old 01-16-2015, 10:19 AM   #23235
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Fully and semi autonomous drones are already being used to smuggle drugs across the U.S. / Mexico border. The intelligence community is already trying to develop countermeasures associated with future potential MASCAL attempts by fully autonomous drones currently available at consumer price points.
I'd be extremely curious to know what sort of countermeasures can even be taken.

In theory, a radio-guided missile could be disrupted by directing large amounts of broad-spectrum RF noise at it, though of course you'd have to know it was there, and have a broad-spectrum RF generator conveniently lying around at that exact instant.

As for GPS-guided solutions, I hadn't seriously considered that possibility as it seemed a lot more complex to build and operate reliably, but I'm not sure how you'd counter it.

Unrelated thing that Scott needs:

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Old 01-16-2015, 10:32 AM   #23236
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Old 01-16-2015, 11:38 AM   #23237
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There are 2 ways you could divert a GPS tracking system, either by jamming or overrunning the signal with your own fake GPS signal. Unless they have very smart GPS units, they won't know the difference and you can have it redirect wherever you want.

Radio jamming doesn't occur with broad spectrum noise as it takes too much power. Jammers are very smart and designed to disrupt certain signals.



Spectracom GSG 6 Series Multi-Channel Multi-Frequency GNSS Simulator, GPS, GLONASS, Galileo L1, L2, L2C, L5

GM20 Military Jammer Used Against Remotely Detonated Bombs
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Old 01-16-2015, 11:55 AM   #23238
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Here are some comments from the second link above:

Quote:
I am using this jammer for almost two months already. I've bought it on my son's advice. He said that it is the best tool when it comes to protection from all those IED's and terrorists. And I'm glad that while buying this device I support the same technology that saved my son's life a couple of times back there in Iraq.
Quote:
I was using similar devices during my service in Iraq. Those devices were much older still they saved my life along the missions when we were patrolling the area with my team. There are so many IED placed along the roads in Iraq you wouldn't believe! If not these jammers I would probably be dead already.

So when I came back to USA I wanted to have such device beside me even in peaceful time. It served me the good turn there. And I found this jammer. It is even more advanced that those I remember from the army so I bought it without hesitations. I use it since then and it works just great.
I'd say he's right and it's enjoyed a 100% safety record right here in good ol' North America.

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Old 01-16-2015, 12:10 PM   #23239
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Unrelated thing that Scott needs:


Just sent this to wife. Would like to proceed.
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Old 01-16-2015, 12:19 PM   #23240
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Just sent this to wife. Would like to proceed.
More info: Homemade Super Mario Bros Cat Climber | MAKE: Craft

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