The colours look more like it's from a servo - if you look, most (if not all) receivers have female plugs for cables to plug into from the speed controller and servo. That said it's a bit square to be a servo.
Last edited:
*breaking news* Boston Marathon explosions
- Thread starter Azza
- Start date
The colours look more like it's from a servo - if you look, most (if not all) receivers have female plugs for cables to plug into from the speed controller and servo. That said it's a bit square to be a servo.
Caporegime
- Joined
- 11 Mar 2005
- Posts
- 32,250
- Location
- Leafy Cheshire
True, looks like it, depends how it's wired though. Slightly confused by the 10awg servo wires though, ends of the battery wire look clean stripped and not burnt, servo wires are burnt, driving a servo with 7.2v is going to be interesting, that's unless they only used 4 cells.
Unless the burnt end is the one which set the detonation cap off.
So with the above in mind looks like the bomber wasn't a million miles away from the blast, and would have been watching.
Caporegime
- Joined
- 11 Mar 2005
- Posts
- 32,250
- Location
- Leafy Cheshire
Battery pack, deffo not, smaller circuit board, perhaps, larger one, doubtful.
The larger board is the perfect size and shape for a RC model car receiver, if you searched hard enough on google you could probably find the make.
Stuff like the above can be purchased without any issues, are super small and doesn't need the GSM network to be alive to set the bomb off.
Someones modified the board though, the power wires going to are far larger than the standard 4.8 or 6v packs need.
The larger board is the perfect size and shape for a RC model car receiver, if you searched hard enough on google you could probably find the make.
Stuff like the above can be purchased without any issues, are super small and doesn't need the GSM network to be alive to set the bomb off.
Someones modified the board though, the power wires going to are far larger than the standard 4.8 or 6v packs need.
Last edited:
Caporegime
- Joined
- 11 Mar 2005
- Posts
- 32,250
- Location
- Leafy Cheshire
In addition i think the smaller electrical board is actually whats found at the bottom of a full sized RC servo, the silver thing hanging off at the bottom of the board, originally i though was a cap, but it could actually be the servo motor itself.
If you look at the corner of the servo board you have curves, this is the location in which the screws pass to keep the servo case and gears together, all the servos i've taken apart seem to have ghetto soldering and that board has the same.
If you look at full sized servo dimensions you get this:
http://www.mindsensors.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=98
M = 39.88mm
The ruler scale in the image puts the board at 40mm.
If you look at the corner of the servo board you have curves, this is the location in which the screws pass to keep the servo case and gears together, all the servos i've taken apart seem to have ghetto soldering and that board has the same.
If you look at full sized servo dimensions you get this:
http://www.mindsensors.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=98
M = 39.88mm
The ruler scale in the image puts the board at 40mm.
Last edited:
Man of Honour
- Joined
- 1 Aug 2004
- Posts
- 12,681
- Location
- Tyneside
Sickening. Ricin is absolutely lethal.
I think you could be right, the cable on the right of this image has what looks like a 3 pin servo cable connector on it. this is what they look like http://imgur.com/IHdBSXJ
It's exactly the cable that would be coming off a RC Rx. Well technically it could be any sort of electronic header cable but it does fit quite well from what we can see.
If the person who set it off was using 2.4ghz RC Tx/Rx he couldn't have been much more than 1000ft away (about the maximum line of sight distance on the ground for that type of radio).
Last edited:
Caporegime
- Joined
- 11 Mar 2005
- Posts
- 32,250
- Location
- Leafy Cheshire
Yep, i'm quite sure those who planted and exploded this bomb watched it go off, they will be on camera / cctv, it's 'just' a case of finding them in the mass of images and video.
It's confirmed as Ricin, in both letters. Can't see if this has been posted yet?
http://www.bbc.co.uk/news/world-us-canada-22190031
http://www.bbc.co.uk/news/world-us-canada-22190031
Soldato
- Joined
- 15 Feb 2011
- Posts
- 10,234
- Location
- Slough
its probably old news in this thread, but 4chan may have found them already:
http://weather-underground.tumblr.c...pens-when-you-give-4chan-images-of-the-boston
i'm not saying that this is the person, but it is suspicious that a very similar backpack has been found within the explosion to the one he was seen to be wearing, then later seen without. he could be totally innocent but the lead is definitly worth persuing
Nope, that is the electrolytic cap, note the plastic coating ripped off it, the top seam and the yellow tantalum cap next to it
Agree, the PCB has cutout corners only on one side suggesting this has been blown in half (all corners should look the same)
Not convinced it is a servo though, what would it do?
The moulding in the casing is the same size at the wires, suggest wires are OEM for a high cap pack.
They've been stripped down and partially used as a trigger mechanism before - probably easier than removing them entirely if they are reusing the remote control side of RC planes as the trigger.
OK, thinking about it, it makes a cheap switch (like the solenoid starter on a car).
(continues to be disappointed at the lack of sophistication)
If something is going to blow up you dont want to spend too much now do you. Proven reliable parts no matter how crude kinda makes sense.
Suggestions that the brown smoke seen after the explosion points at Tannerite, freely available in the US.
http://en.wikipedia.org/wiki/Tannerite
(forward to 0.44)
http://en.wikipedia.org/wiki/Tannerite
(forward to 0.44)
Last edited: