correct as-is Lower topspeed after the update?

[dedlike.]

I havent been flying the apache in quite some time now, but i cant seem to get the apache over 120-130 knots anymore, before this update, if i realy pushed it i could manage to go around 140-145 knots,  same conditions ofc

[bradmick]

120 to 130 knots for a loaded aircraft with an FCR, 2 hellfire launchers and 2 rocket pods is accurate.

[Hiob]

36 minutes ago, bradmick said:

120 to 130 knots for a loaded aircraft with an FCR, 2 hellfire launchers and 2 rocket pods is accurate.

Do you have a reference number for a clean bird? Just out of curiosity.

Edited September 30, 2022 by Hiob

[dedlike.]

well , my numbers were with 2 hellfire launchers, no fcr, no rocketpods, i could understand it with rocket pods tho since they dont exactly scream areodynamics

Edited September 30, 2022 by dedlike.

[Hiob]

Just now, dedlike. said:

well , my numbers were with 2 hellfire launchers, no fcr, no rocketpods, i could understand it with rocket pods tho since they dont exactly scream areodynamics

 

Are you trimmed N-T or aerodynamicly?

[Dagobert666]

I've always been told that the cruising speed of an Apache is 120Kt and the top speed is somewhere around 160Kt....
But if you google it, the top speed of an AH64D is around 143Kt....
The Apache is real not a sprinter... More  a comfortable jogger^^

Edited September 30, 2022 by Dagobert666

[dedlike.]

vor 2 Stunden schrieb Hiob:

Are you trimmed N-T or aerodynamicly?

N-T but tbh, i dont have a problem with the slower speed, its just that im not used to itand well.. it suprises me that the apache is not realy any faster than a Huey basicly

[Hiob]

3 minutes ago, dedlike. said:

N-T but tbh, i dont have a problem with the slower speed, its just that im not used to itand well.. it suprises me that the apache is not realy any faster than a Huey basicly

Well, the AH-64s design never struck me as "optimized for speed"....

But N-T isn't the proper trimming for top speed if I'm not mistaken.

[Raptor9]

A-models were indeed faster, but they had less drag and weighed less.

If you load down an airplane with additional weight, it needs to increase it's angle-of-attack at a given airspeed to produce more lift to counter the additional weight. As a result, the higher AoA increases drag, requiring more thrust to maintain the same airspeed and lowering the overall top speed in level flight accordingly.

Helicopters must also increase their angle-of-attack, using collective, to maintain level flight at a given speed at higher gross weights. This increases drag on the rotor system and reduces performance if more engine power and rotor lift is being used to maintain altitude instead of propulsion. (Mi-24 is able to offset this with substantial lift production from the wings, retaining more rotor power for propulsion in forward flight)

So with the additional drag from the larger fuselage profile (even without the FCR installed) along with the increase in gross weight, the AH-64D is slightly slower than earlier A-models. More engine/rotor power must be utilized for lift versus propulsion, and the increase in frontal drag further impacts the speed as well; although not to the same magnitude as the increase in gross weight.

In any case, the addition of the FCR has additional drag and weight impacts, as does going out with a full load of fuel and weapons. It's no different than trying to takeoff in an A-10 loaded like a B-52; reaching 200 knots and 5,000 feet will take an eternity, and your turning radius and maneuverability will be horrendous. Just because you can physically carry all of that, doesn't mean it is tactically sound to do so if you can't maneuver as needed.

[petsild]

Hi,

the principle of how the helicopter works is clear to me, but the explanation from Raptor9 is general for all helicopters.

But this does not correspond to our Apache, what is in the DCS, if I remove the weight of the helicopter, without ammunition, fuel and without FSR,

it is still too slow and the comfortable control speed is at a low 125-135knots.

Moreover, after exceeding such a speed, the helicopter becomes quite uncontrollable.

At the same time, all well-known military encyclopedias mention significantly higher speeds of the loaded machine!

Please ED Apache needs flight model revision thank you.

https://asc.army.mil/web/portfolio-item/apache-attack-helicopter-ah-64d-e/