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HomeAircraftHelicopterFuel-Helicopters New or Limited ActivityAvant › Whats the differance between an Avant Aurora and a Avant EFX?
04-04-2009 02:15 PM  9 years agoPost 1
JohnDa

rrVeteran

England, South West

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As the title says Whats the differance between an Avant Aurora and a Avant EFX?

Thanks

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04-04-2009 03:33 PM  9 years agoPost 2
Dood

rrProfessor

Wescanson

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  • The Aurora is complete kit.
  • The FX and EFX are just upgrade kits for some Hirobo helicopters.
    They require a Hirobo "donor" heli to complete the build.
  • The FX came first for the Freya & X-Spec, then came the EFX for the EVO 90.
  • The FX and EFX use several components from their donor helicopter such as head, clutch stack, fan/ fan hub, gear train, landing skids/ struts, fuel tank and tail.
  • The "Programmable Head" you see on some EFX and FX helicopters is an option, which needed to be purchased separately.
    The Aurora includes the Programmable Head.
  • In the case of the EFX kit conversion for the Evo 90 there are a few additional parts you need to buy (fan shroud, a pulley, and I forget what else)
  • The Aurora has a built in 1-way system in the clutch stack, the FX and EFX do not.
  • The FX and EFX use the Autorotation 1-way system of their donor helicopter. The Aurora uses a sprague clutch system.
  • The Aurora uses the same CCPM design as the FX and EFX.
  • The Aurora, FX and EFX share several common parts such as bearing blocks, engine mount and ccpm bellcranks.
  • The Aurora uses a shaft driven tail system, whereas the FX and EFX use the belt driven tail from their donor heli.
  • The Aurora takes advantage of several innovative design features such as break-away "sacrificial tabs" that the canopy posts mount to in a crash, and a slanted, sliding battery/ radio tray that is adjustable in order to correct the helicopter's CG on multiple axes.

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04-04-2009 03:34 PM  9 years agoPost 3
baddynergy

rrElite Veteran

sierra madre, ca- usa

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The Avant Aurora is a complete kit, the EFX is a conversion kit for a Hirobo Freye airframe.

**Unattended children will be givin a shot of espresso and a puppy**

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04-04-2009 03:35 PM  9 years agoPost 4
JohnDa

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England, South West

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Thanks

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