anti-icing MR + TR
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Join Date: Apr 2001
Location: Hartford, Connecticut, USA
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anti-icing MR + TR
I was wondering if anyone knew how the anti icing systems work for the main and tail rotors? If it is electrically heated is current transfered through commutators or what? That is the only idea i can think of. thanks in advance.
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I'm not sure what you are asking about. Most Helis do not have an Anti or De-ICe capability. The S-61A (Sea King) used to have a anti ice system but it was not that reliable.
The Super Puma can handle light Ice but unless you spend the big bucks and buy the Military blades, your out of luck.
The newer Heavies, ie. S92, EH101 will have an intergrated anti/de-ice system using an electric system.
Hope this helps.
Cheers,
OffshoreIgor
The Super Puma can handle light Ice but unless you spend the big bucks and buy the Military blades, your out of luck.
The newer Heavies, ie. S92, EH101 will have an intergrated anti/de-ice system using an electric system.
Hope this helps.
Cheers,
OffshoreIgor
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The Merlin/EH101 incorporates anti-ice (to stop ice accretion) on the tail rotor and de-ice (allow to accrue then shed) systems on the main rotor. Both systems are electrical and rely on heating elements in the blades. The de-ice programme changes depending on OAT and liquid water content. You will still get an increase in wt and parasite drag from the airframe accumulations when flying in icing condition but the blades should stay mainly clear of ice so no Tq increase due to ice accumulation. 
Hope this is of interest to those of you in colder climes.
Hope this is of interest to those of you in colder climes.
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ok but how are the heating elements powered? since the rotors are obviosly spinning they cant be hard wired right? Is there a commutator or something similar like I said earlier?
Baranfin,
They are connected by slip-rings (commutators) powering heated electrical mats in the same manner as heated props on fixed wing aircraft.
The Puma has had the system available for a considerable time. The 332L2 Super Puma Mk2 also has a system available.
The S92 system technology is supposedly being looked at as a potential retrofit for the S76 (depending on who you talk to), and for introduction into a new improved variant of the S76.
[ 16 November 2001: Message edited by: Cyclic Hotline ]
They are connected by slip-rings (commutators) powering heated electrical mats in the same manner as heated props on fixed wing aircraft.
The Puma has had the system available for a considerable time. The 332L2 Super Puma Mk2 also has a system available.
The S92 system technology is supposedly being looked at as a potential retrofit for the S76 (depending on who you talk to), and for introduction into a new improved variant of the S76.
[ 16 November 2001: Message edited by: Cyclic Hotline ]
