best trim to use

[Alphagamer1981]

when im flying on heading somewhere, i get a lot of drift, where the plane likes to bank either to the left or the right, what is the best trim to counter it? I tend to use the aileron trim instead of rudder trim, it does seem to work but can be quite sensitive, is this the right way? Is this trim also the better one to use when you get an engine out and have to feather it and do trim corrections? 

[Art-J]

In every oldschool "analog" airplane roll induces yaw, yaw induces roll, so... you must use both trims really.

Youi could kind of consider rudder one more important (how are you going to read compass, do gunnery or rocket launching if you're flying sideways?), but leaving ailerons untrimmed is tiresome in the long run as well.

One engine out? Forget it, you'll need both trims, A LOT of them.

Yes, aileron and rudder trims in Mossie are quite sensitive in DCS, what do you use to operate them? Hat switch on your joystick? I use keyboard - sure, it's not "HOTAS" experience, but tapping keys sends shorter signals than fumbling with hat switches, which gives me more precision and allows to trim Mossie for hands off flight for a few minutes. But that's me, you're mileage may vary.

[Alphagamer1981]

lol, yes i am using a hat switch, i will have a look at keyboard and see if that does help, thanks 

[grafspee]

2 hours ago, Alphagamer1981 said:

lol, yes i am using a hat switch, i will have a look at keyboard and see if that does help, thanks 

Important thing is to check your trim gauges and slip indicator, trimming ailerons and rudder blindly you may end up with weird situation when you will be correcting excessive aileron trim with rudder trim and vice versa.  I also say that rudder trim is the most important. I trim that way that i trim rudder for minimum slip and then i adjust ailerons to level the wings but at first i stabilize plane with stick and rudder then i gradually trim and at the same time letting slowly stick and rudder off.

[Alphagamer1981]

yeah, im trying to perfect it, in the mossie you have the arrow at the top and the arrow at the bottom, im guessing both need to be pointing directly up and directly down when at level flight

[PawlaczGMD]

Being untrimmed in yaw induces roll. Always trim yaw first with neutral roll, then roll if needed. Pitch is mostly independent.

[Terry Dactil]

Be aware that a small amount of bank can be helpful.

Vmca for the Mosquito is defined with 5° bank into the good engine.

[bbrz]

19 hours ago, PawlaczGMD said:

Being untrimmed in yaw induces roll. Always trim yaw first with neutral roll, then roll if needed. Pitch is mostly independent.

Exactly. I've never flown any prop driven plane IRL which requires aileron trim to counteract prop etc. effects.

The only time you usually need aileron trim is a misrigged airplane and/or fuel imbalance.

 

[Terry Dactil]

12 hours ago, bbrz said:

Exactly. I've never flown any prop driven plane IRL which requires aileron trim to counteract prop etc. effects.

Agree 100% with bbrz.  I used this training aid many years ago to hammer in the message "IF YOU ARE HOLDING CONTINUOUS AILERON YOUR RUDDER INPUT IS WRONG. MOVE YOUR FEET!    (the down side of the yoke is pointing to the foot that needs to go in more)

 

Edited May 7 by Terry Dactil

[Bozon]

Luckily the Mosquito requires only few rudder trim adjustments during flight.

Rules of thumb:

1. Slow speed + high boost (e.g., takeff and climb) = rudder trim at the “T” on the dial.

2. High speed + boost > +10 = rudder trim at the bottom corner of the “neutral triangle”.

There are other situations, but these are the main 2 where I immediately trim quick & blind, and check the ball later.