I've just about got the hang of the bo105 (I think) but....

It continually rotates to the right in 'level-cruise'.

Now, I'm not a heli man myself (all my realworld experience is fixed wing) so 
I'm a bit rusty on the principals.

I've tested this with all wind at 0 and 0 turbulence set.

I've found that at any collective setting, the rate of rotation to the right 
in the cruise is the same. Applying left rudder(?) bar just causes a 
deflection into a 'crabbed' track and the aircraft continues its steady 
rotation to the right. - I've also checked this at various collective 
positions and speeds.

I've found that the only way to maintain a straight track over the ground is 
with 10-15deg bank. Based on having watched many helis fly, I don't think 
they usually bank to maintain track (I could be wrong on this).

So......

Can anyone fill me in? - Is the FDM doing something funny or am I way off the 
mark with the principals of rotary flight?

Cheers

Dave Martin

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