Simviation Forums

Does anyone know which part of the air file ( if it is the air file) that controls the drift to the right or left caused by the torque of the propellor on powerfull single engined prop aircraft during  take off ?

How do you adjust it ?

To adjust, feed in a bit of oppersite rudder.......Works in the real world too

Matt

Thanks , but you (perhaps ) did not get the drift of my question.

I have an aircraft with a counterclockwise rotating prop which drifts to the left and requires right rudder to keep it straight, when in the real world it should drift right and require left rudder.

The Aircraft container SDK from Microsoft implies under " propellor induced turning effects" that the sim automatically adjusts for direction of rotation. In my case this does not appear to be so. Unless the sim needs to be told the direction of the prop rotation in some way?

Hmmmmm. I have close to 1000 hrs real world time spanning a dozen different light aircraft. They all have counter-clockwise rotating engines and they ALL require RIGHT rudder to stay straight.

By any chance, are you determining rotation direction as viewed from the cockpit? If so, that's the problem.

Cal (CYXX)

Yes I am determining prop rotation as viewed from cockpit .

The sim aircraft involved are the Just Flight Spitfires. The Merlin engined machines rotate clockwise when viewed from the cockpit and require a lot of right rudder on take off ( as indeed the Merlin Spit does in real life. Same deal as your light aircraft.

The Griffon engined Spits ( and Just Flight 's models) have prop rotation counter clockwise , when viewed from the cockpit , but in the sim still require right rudder to keep straight. I am trying to alter this to mimic the real life situation where Griffon Spits require loads of left rudder (or trim).

As I say , the SDK on Aircraft files says that the Sim should automatically take care of differences in prop rotation, but in this case it does not .

I just wondered if anyone knows of a solution to this problem?

I think I found it.

Open the Aircraft.cfg file with Notepad
Scroll down to the heading, "PROPELLER"
Check to see if there is a line, "rotation=(n)"
If so, it needs to be, "rotation=-1"
If not, create the line, "rotation=-1" (first line under heading is okay)

(don't include the quote marks in your entry)

Let us know if this works.

Cal (CYXX)

Absolutely brilliant!   Well done!    Works perfectly!    :D

I will post this tip on the Justflight forum and give you credit for it if that is OK ?

Do so if you wish.... with my thanks.

I found this by simple deduction. Knowing there is one default aircraft with "wrong-way" engines, the de Havilland Comet,  I just compared it with the Beech Baron. The Comet has an entry for rotation (-1), but the Baron does not. Obviously,  the SIM defaults to CW rotation if the entry is missing.

It's odd that the Aircraft Container SDK doesn't mention it. Probably an oversight.

Cal (CYXX)

Yes strange about the SDK omission on this, I had read through that with a fine toothcomb before posting in the forum.

Anyhow, your powers of deduction were worthy of Shelock Holmes, well done again !