Las Vegas, NV siren hunt; 1 still here, one gone

[Charlie Davidson]

Looks like the same position to me...

Same here..it does look to have moved slightly, most likely from the wind.

[kx250rider]

The wind blows all the time here, and judging by my Thunderbolt in Moorpark, this one has probably spun around a zillion times. I keep mine tethered to a post, or it would wear out it's clutch in a hurry.

Charles

[Thunderboltlover]

Which model of t-bolt is that?

[kx250rider]

Which model of t-bolt is that?

Not sure... I couldn't see the blower box, and haven't heard it to tell if it's dual tone or not. If it means anything, the construction of that building appears to be late 1960s/early 70s based on the type of concrete blocks, and the siren appears to be no older than the building, since it's "built-in".

Charles

[Robert Gift]

The wind blows all the time here, and judging by my Thunderbolt in Moorpark, this one has probably spun around a zillion times. I keep mine tethered to a post, or it would wear out it's clutch in a hurry. Charles

What clutch?
Why a clutch? So strong wind torque does not damage the horn?

[CJ]

The wind blows all the time here, and judging by my Thunderbolt in Moorpark, this one has probably spun around a zillion times. I keep mine tethered to a post, or it would wear out it's clutch in a hurry. Charles

What clutch?
Why a clutch? So strong wind torque does not damage the horn?

They actually use some sort of clamp round something that lets it slip when the wind blows hard enough. Apparently they're made of leather, there was a thread about it recently.

[kx250rider]

What clutch?
Why a clutch? So strong wind torque does not damage the horn?

It's a coupler which is basically two shafts, with a sleeve clamp over them. That way, the clamp is set to a certain tightness, and if the wind pushes the horn harder than what might do damage to the gears, it will slip. Same goes if the motor is trying to turn the horn, and something jams up. I like that device a lot better than what they did on our horse exercise machine... That has two castle gears, which have iron rods (32 of them) slid into the teeth of the castle gears. So when something goes wrong, the rods break apart, which is what it's designed to do (as with the siren) to protect the gears and motor from too much force. I've had to replace those rods now three times, as we've had some wind measured in excess of 160MPH gusts nearby in the last year.

Charles

[ginbot86]

What clutch?
Why a clutch? So strong wind torque does not damage the horn?

It's a coupler which is basically two shafts, with a sleeve clamp over them. That way, the clamp is set to a certain tightness, and if the wind pushes the horn harder than what might do damage to the gears, it will slip. Same goes if the motor is trying to turn the horn, and something jams up. I like that device a lot better than what they did on our horse exercise machine... That has two castle gears, which have iron rods (32 of them) slid into the teeth of the castle gears. So when something goes wrong, the rods break apart, which is what it's designed to do (as with the siren) to protect the gears and motor from too much force. I've had to replace those rods now three times, as we've had some wind measured in excess of 160MPH gusts nearby in the last year.

Charles

So the shear rods are weak or something if they keep breaking?

[kx250rider]

So the shear rods are weak or something if they keep breaking?

It's the wind... If the guys forget to tie up the rotor on the horse exerciser, and a wind comes up (nearly every day during the late fall/early winter), the wind pushes it and breaks the shear rods (thank you; I didn't know the exact name).

Charles