Caldera Posted April 17, 2022 Author Share Posted April 17, 2022 (edited) Thanks for the replies! Admittedly, I am a rock head and slow to get it... But I am an (ex) controls guy and I do struggle with concept of an "Aerodynamic Trim" sensor. To my knowledge, there is no "Weather Vane Rooster" mounted any where on the AH-64D so the actual trimmed or not trimmed values and the Trim Ball indication are derived from another source. I am just trying to get my head around that concept. Frankly, the thing reacts more like the ball in the turn bank indicator of for example the P-47D than the gyroscopically driven instrument of a modern digital aircraft. Caldera Edited April 17, 2022 by Caldera 1 Link to comment Share on other sites More sharing options...
Flamin_Squirrel Posted April 17, 2022 Share Posted April 17, 2022 27 minutes ago, Caldera said: Frankly, the thing reacts more like the ball in the turn bank indicator of for example the P-47D than the gyroscopically driven instrument of a modern digital aircraft. Caldera That's because it basically is the same as from a P-47! Link to comment Share on other sites More sharing options...
Wrcknbckr Posted April 17, 2022 Share Posted April 17, 2022 Think of the trim ball as a lateral accelerometer. In (aerodynamic) trim in a straight flight all accelerations are zero, so trim ball stationary. Any trim ball deflection still showing is due to the gravity component. A left deflection if you are banked to the left, right if banked to the right (still trimmed). You might as will be trimmed in a sideward flight with FPV pointing sideways as long as it's stationary. Link to comment Share on other sites More sharing options...
shagrat Posted April 17, 2022 Share Posted April 17, 2022 vor einer Stunde schrieb Caldera: Thanks for the replies! Admittedly, I am a rock head and slow to get it... But I am an (ex) controls guy and I do struggle with concept of an "Aerodynamic Trim" sensor. To my knowledge, there is no "Weather Vane Rooster" mounted any where on the AH-64D so the actual trimmed or not trimmed values and the Trim Ball indication are derived from another source. I am just trying to get my head around that concept. Frankly, the thing reacts more like the ball in the turn bank indicator of for example the P-47D than the gyroscopically driven instrument of a modern digital aircraft. Caldera If the digital ball irritates you, you may want to look at the "classic" oil dampened ball on the right, where the auxiliary instruments are? Maybe it helps to think about the way a helicopter moves into a direction. You tilt the rotor disc in any direction you want. You could tilt the disc aft left the FPV would "point" to the aft left and the ball to the right... and that is definitely not "straight". The amount it does not match the actual flight path is determined, by the amount of thrust from the tail rotor and/or torque turning the helicopter clockwise... Shagrat - Flying Sims since 1984 - Win 10 | i5 10600K@4.1GHz | 64GB | GeForce RTX 3090 - Asus VG34VQL1B | TrackIR5 | Simshaker & Jetseat | VPForce Rhino Base & VIRPIL T50 CM2 Stick on 200mm curved extension | VIRPIL T50 CM2 Throttle | VPC Rotor TCS Plus/Apache64 Grip | MFG Crosswind Rudder Pedals | WW Top Gun MIP | a hand made AHCP | 2x Elgato StreamDeck (Buttons galore) Link to comment Share on other sites More sharing options...
Caldera Posted April 17, 2022 Author Share Posted April 17, 2022 (edited) Thanks to all! It was really this experiment that in a side ways sort of way turned the light bulb on for me. Simply watching what the Trim Ball did, as I rocked the aircraft back and forth. Caldera Edited April 17, 2022 by Caldera Link to comment Share on other sites More sharing options...
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