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View Full Version : Trimming for TO & L



XyZspineZyX
07-28-2003, 06:17 PM
I use elevator trim a little for getting level flight after take off and when I'm up to speed. It seems to help with my aim, too. But, I've heard people mention that they rim for take off & landing. Can someone explain how this is done?

I don't have a slider, so please leave that whole TOAS thing alone, ok?

I fly a P-39 most often in IL2. I find that sometimes it's a bit tough to get the nose up during take off. Should I be trimming up my elevators? I don't normally use flaps at all. How about landing? I'm getting better at getting down on that trike gear, if I can manage not to come in too slow/fast, but sometimes I still bounce it too hard and tehn I'm *** over ankles all over the runway (or near enough). How can I trim to make touch downs smoother?

XyZspineZyX
07-28-2003, 06:17 PM
I use elevator trim a little for getting level flight after take off and when I'm up to speed. It seems to help with my aim, too. But, I've heard people mention that they rim for take off & landing. Can someone explain how this is done?

I don't have a slider, so please leave that whole TOAS thing alone, ok?

I fly a P-39 most often in IL2. I find that sometimes it's a bit tough to get the nose up during take off. Should I be trimming up my elevators? I don't normally use flaps at all. How about landing? I'm getting better at getting down on that trike gear, if I can manage not to come in too slow/fast, but sometimes I still bounce it too hard and tehn I'm *** over ankles all over the runway (or near enough). How can I trim to make touch downs smoother?

XyZspineZyX
07-28-2003, 06:32 PM
The simplest way to do it is to set the trim so that the plane goes level. As you change speed, change trim.

Once you get used to it, you will memorize the amount of trim needed for takeoff, level flight @ various speeds and landing.

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adlabs6
07-28-2003, 06:35 PM
I generally set my trims to neutral for TO & L. Often I have an unexpected rate of skin or lower approach speed otherwise. I just apply forces to the stick to control my touchdown slope. At least with the trim centered, I'm never surprised by lack of elevator action due to trim influences.

How correct this is, I have no idea, but it works very smoothly for me.

The most useful controls to help here are speed control, and holding absolutly steady sink during approach. Use the flaps and a midline throttle setting, I do not let my speed vary more than 10 km/h from 190 km/h on approach. Flareing and setting down with out a bounce are very easy like this, my plane often just seems to 'roll' on to the runway, with no trasition, other than wheel sounds.

Good Luck!

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XyZspineZyX
07-28-2003, 06:39 PM
adlabs6 wrote:
- The most useful controls to help here are speed
- control, and holding absolutly steady sink during
- approach. Use the flaps and a midline throttle
- setting, I do not let my speed vary more than 10
- km/h from 190 km/h on approach. Flareing and setting
- down with out a bounce are very easy like this, my
- plane often just seems to 'roll' on to the runway,
- with no trasition, other than wheel sounds.

That sounds good... It's pretty much what I'm doing now. I just wasn't sure if I was missing out on something with using trim. I jsut need to practice more often.

XyZspineZyX
07-28-2003, 07:04 PM
I usually trim neutral for landing. For takeoff I trim positive so that the AC will leave the ground on it's own @ speed. I fly the P-39 in IL2 often and this works well.

Hey, if your going to fly the Iron Dog check out Zeno's P-39 videos (http://www.zenoswarbirdvideos.com/P-39.html).




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XyZspineZyX
07-28-2003, 09:30 PM
georgeo76 wrote:
- Hey, if your going to fly the Iron Dog check out <a
- href="http://www.zenoswarbirdvideos.com/P-39.html">
- Zeno's P-39 videos</a>.

Ahhh yes, I've seen these some time ago, but it would be nice to revisit now that I've spent a decent amount of time in my Cobra. Thanks georgeo!