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Re: China's Largest Siren Ever "Defender" is Real *video*
Posted: Sun Dec 14, 2014 1:08 am
by DJ2226
It sounds like it has 7 or 8 ports. It sure has a mighty quick linear wind up for a 220 HP engine driven siren. That has me wondering if they are using the engine to drive a generator and blower. The generator powers a motor that drives the chopper. If that's the case then they could control the output of the siren, which could explain why it sounds so muffled. It could be that they are driving the blower at half speed so they don't blow people's ears to hell and back given that this thing has the potential of a T-135.
Re: China's Largest Siren Ever "Defender" is Real *video*
Posted: Sun Dec 14, 2014 1:14 am
by rdfox
The quoted power requirement in the SCMP article converts to 211 horsepower; the specs sheet says 220. So it requires quite a bit more power than the Chrysler did, and yet is 8db quieter? Even a T-135DC is louder...
Re: China's Largest Siren Ever "Defender" is Real *video*
Posted: Sun Dec 14, 2014 3:27 am
by Fearguy1234
DJ2226 wrote:It sounds like it has 7 or 8 ports. It sure has a mighty quick linear wind up for a 220 HP engine driven siren. That has me wondering if they are using the engine to drive a generator and blower. The generator powers a motor that drives the chopper. If that's the case then they could control the output of the siren, which could explain why it sounds so muffled. It could be that they are driving the blower at half speed so they don't blow people's ears to hell and back given that this thing has the potential of a T-135.
Makes since to control the output of it, yet I wonder how far away it is from the memorial.
Re: China's Largest Siren Ever "Defender" is Real *video*
Posted: Sun Dec 14, 2014 2:27 pm
by gman 1
The video won't work
Re: China's Largest Siren Ever "Defender" is Real *video*
Posted: Sun Dec 14, 2014 4:58 pm
by ArrowShooter1003
Is there a way to adjust the blower so that it will run at full power?
Re: China's Largest Siren Ever "Defender" is Real *video*
Posted: Mon Dec 15, 2014 8:05 pm
by Don't Panic!
rdfox wrote:The quoted power requirement in the SCMP article converts to 211 horsepower; the specs sheet says 220. So it requires quite a bit more power than the Chrysler did, and yet is 8db quieter? Even a T-135DC is louder...
The Lion King siren has 40 HP more than Chrysler Bell, so is it case of lower decibels, yet more watts of power or is it less efficient in its sound output compared to the Victory siren?
Re: China's Largest Siren Ever "Defender" is Real *video*
Posted: Mon Dec 15, 2014 8:09 pm
by Chem_Boffin_6589
ArrowShooter1003 wrote:Is there a way to adjust the blower so that it will run at full power?
Probably; it could be powered by the accelerator in the cab, though.