Expo - And The Little Grey Cells

[Rotorhead]

Erm I think some here are confusing expo with what a cyclic ring does, if you put the sticks into the corners you'll get 1.41 times the amount of combined travel as you would at pure 12,3,6,9 o clock cyclic positions, expo does not come into that at all, or at least makes no adverse changes, as that only softens up the stick response near centre stick, your end points are still 100% (or what ever you set them at) no matter what expo you've put in, so in the corners you'll still be at 141% of your throws.

In the corners, any expo value if applied to both aileron and elevator would be reducing the elevator and aileron in a combined fashion, so it would be no different to considering just pure aileron for example, what I mean is that expo percentage, eg -25% (futaba) on both aileron and elevator in the corners would be applied to 141% of combined movement, but it would be a combination of the individual -25%'s of each considered on their own, as you come around say to the 3 oclock position, you're then taking -25% on the aileron, but 0% on the elevator, even though -25% is still programmed in (-25% of nothing...)

You can't just put expo in and think that that's going to act like a cyclic ring.

[scallybert]

Speaking as the OP.., this thread is about how expo can distort the cyclic output in unexpected ways.

Eg circular stick input doesn't result in 'circular' cyclic output from the Tx.

[Bob H]

This will only happen if you have different expo values in the elevator and aileron channels. You will then get an ellipse or oval shape rather than a circle. If there was no expo or the same expo in both channels and you could stick a pencil onto the swash at it's centre point so it is parallel to the main shaft at zero stick, the point of the pencil will draw out the same circle as the stick did.

[scallybert]

This will only happen if you have different expo values in the elevator and aileron channels. You will then get an ellipse or oval shape rather than a circle. If there was no expo or the same expo in both channels and you could stick a pencil onto the swash at it's centre point so it is parallel to the main shaft at zero stick, the point of the pencil will draw out the same circle as the stick did.

Unless you're bringing in a new argument I've missed; this has already been shown not to be the case.

I think you've missed the point.