Posted on 04/17/2013 9:29:17 AM PDT by swamp40
Would be good if zIpper pull had fingerprints of culprit.
that’s a good picture of a brushed servo controller. that could be it. The servo leads were probably going to the bridge wire (blasting cap, obviously not shown) for detonation. The receiver circuit has a switch that would turn on the power to the motor, which instead was used for the bridge wire. This is probably why such a battery was needed or else the bomber didn’t know how to modify the regulator in the toy he used. I guess the motor lead for vibration in cell phone could be similarly used.
Is that a cellphone beneath the board on the first pic? Looks like an older flip phone...
Nope, but then again, I'm starting to question all of the pics and reports coming from the MSM........too many contradictions, too many false leads, too many false reports.
I'm thinking the authorities are deliberatly clouding the facts and letting the MSM deliver the disinformation.
So, we’ve identified two electronic components used in the bombing - the battery pack and the ESC motor controller.
The RF receiver that plugged into that motor controller was most likely a 2.4GHz version.
Its pc board had distinctive notched corners used by companies such as Futaba and E-flite.
Whoever bought these items also had to buy a 7.4V NiMH charger (slightly unusual today).
And they also had to buy a 2.4Ghz transmitter, which is fairly bulky and most likely looks somewhat like a gun, so that would probably be in ANOTHER backpack.
And they may have bought one for each bomb to simplify things.
So they started the day out with THREE backpacks/bags.
And they were probably right BETWEEN the two bombing sites.
The range on 2.4GHz RC modules in that area isn’t that great with so many buildings and people - the bomber probably stayed within 500 yards to make sure they both worked.
The rooftop would be ideal from an RF perspective, but I’ll bet the bomber preferred the anonymity of the crowd.
The battery is a Tenergy rechargeable D battery. It was identified and the maker is a SF Bay area maker.
The battery is made for high end remote control planes and helicopters. It is very expensive, with a suggested retail price of $32.99. Then a good ? is why would a Jehadist/Islamofascist killer use one of these when a plain Jane Duracell would work. The battery for the bomb was only needed once.
If they practiced with dummy exlosives, then they might have need an expensive rechargeable battery. If they practiced out side, someone might have seen them.
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