#VRS's missing counterpart: Translational Lift

15 messages · Page 1 of 1 (latest)

sonic hedge
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I'm not sure how helicopters with the rotor diameter and weight of the chicane are supposed to feel.

I fly UAVs IRL and even the largest cinema Quads don't compare to full size conventional rotorcraft. The Tarantula feels on point, if not a bit too "lifty" in VTOL mode, but I have little knowledge of the Chicane.

I'll leave my like though, and maybe you can elaborate a bit further how the Chicane SHOULD act vs how it does right now.

brisk lintel
# sonic hedge I'm not sure how helicopters with the rotor diameter and weight of the chicane a...

Fixed pitch props are fundamentally different to rotors in most cases so the comparison can be deceptive. Since rotors are lifting wings moving in a circle they work differently to a fan that changes its thrust by changing rotational speed. Not sure how else to word it.

In this case consider how a Skyhawk or other light airplane can fly forwards and stay in the air even though it has a TWR of less than one. Forward airspeed over the wing is more efficient than using a propeller alone due to several factors. This same concept applies to rotorcraft, which is why things like rolling takeoffs and conventional landings are done by heavily loaded Blackhawks. In the case of an engine loss most twin engine helicopters have a minimum airspeed requirement to stay airborne.

The Chicane just feels bizarrely heavy because it never "catches the air" so to speak.

lament jolt
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agreed

sonic hedge
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I presume that the effect should be more pronounced and affect total lift more?

brisk lintel
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VRS's missing counterpart: Translational Lift

sonic hedge
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Oh, I understand now, so it's supposed to onset MUCH sooner

lament jolt
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i think that might be misspelled

brisk lintel
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Yeah, it is

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Translational lift is improved rotor efficiency resulting from directional flight in a helicopter. Translation is the conversion from the hover to forward flight.: 2–27  As undisturbed air enters the rotor system horizontally, turbulence and vortices created by hovering flight are left behind and the flow of air becomes more horizontal. The effi...

sonic hedge
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Back when I could touch DCS without throwing up I remember that the KA52 felt very light and maneuverable, but I always thought the contra-rotors were the reason.

But indeed, maybe the Chicane is missing some lift.

Just like it's missing the 20mm anti-missile-prox-fuse cannon option for the nose, and full S1 loadout.

brisk lintel
# sonic hedge Back when I could touch DCS without throwing up I remember that the KA52 felt ve...

Ka-50, not 52. But it was much more noticable in the DCS UH-1 since you could overload that vehicle AND it didn't have a computer managing your collective for you. Translational lift does affect the Ka-50 but i think the autopilot/altimeter accomodated for the effect and made it less noticeable.
I learned that it can be useful when I lost an engine while hovering and had to do a rolling takeoff to get back in the air.

sonic hedge
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Yeah, then this suggestion of yours deffinitely needs to have dev eyes over it.

deft hearth