F16 Pitch Trim - VERY Sensitive

[Mover]

I never trim pitch for landing. You fly the Viper all the way down to the flare. It's a controlled landing and with the brakes out you're still working the throttle until you idle right before flare. It's actually a hell of lot easier than the Hornet. As I approach EOR my nose is pointing where I'm going to put down. FPM is at the bottom of the staple. As I cross EOR I go idle and flare putting the FPM in the middle of the staple to just above the middle. Then it's kiss the runway.

 

Bottom of the staple is way too slow.

 

Just watch the video Wags made.

[DerekSpeare]

Ok, so back to the pitch trim - is one click of pitch trim supposed to have the effect it does like shown in my video in my first post?

[Davee]

You don't.

 

Use pitch and power to maintain 11 AOA (top of the bracket). 144kts plus 4 kts per thousand pounds of fuel and stores on final. You can trim if needed, but it typically isn't. Don't forget to have the boards out.

 

Don't fly it like a Hornet.

 

Ah, thanks for this info.

 

I've been trying to determine the appropriate approach speed and find that I'm too fast until the flair. This bird likes to fly and knowing these specs will give me some incentive to continue to pitch up using the stick to obtain the 11 degree's necessary. Up until now, I'm falling back halfway to the Hornet methodology which I know to be incorrect but it has been working quite well with a little pitch just before the flair.

[DerekSpeare]

I followed Mover's formula here:

 

 

GOHlC1NzpOU

 

 

 

but my airspeed is less than what he said to go. The plane has no stores and ~5200# fuel; e.g., 144 + 20.2 = 164.2kts +/-. My airspeed is lower than expected with AOA slightly less than 11deg. The upside is that I landed lololo...

Edited October 12, 2019 by DerekSpeare

[Hoffster]

very nice landing there. Airspeed is secondary and aoa primary in most fbw aircraft as you probably know. Sure it will be tuned to be very close to irl in a few updates.

[Wicked.-]

I was half asleep after a 4 hour online Index VR session when I explained my final FPM/staple position before flare. The FPM is above the staple not at the lower portion. When I flare I'm pulling the staple up to center the FPM or slighly high of center. I usually touch down around 130-145. Anyway, no pitch trim at all, just balancing speed and AOA.

[bbrz]

The FPM is above the staple not at the lower portion. When I flare I'm pulling the staple up to center the FPM or slighly high of center.

Now that makes sense :)

[Dee-Jay]

Hi!

One click of trim seems to change the g-load by 0.1 units at high IAS in clean config. Don't know if that's correct.

It is not. 0.1G per one "click" is far too much!

Trims neutral, A/C is supposed to maintain 1.0G

 

 

Side note: IMO, one shouldn't use custom axis curves. if FLCS is correctly made, curves are native and included in FLCS itself.

 

Regards.

Edited December 31, 2019 by Dee-Jay