Flight Model: Is this possible?

[wilbur81]

Many of you have probably seen this Finnish Hornet demo on YouTube:

 

 

That negative G push-over at 0:43 is impressive! Anyone pulled that off in our DCS Hornet? If so, what was your IAS at the moment of forward stick?

Edited August 14, 2019 by wilbur81

[Moafuleum]

OT: it is a finnish hornet btw ;)

[norbot]

By the way, the "Swiss" Hornet is Finnish. ;)

[Caffeine_High]

You meant Finnish?

[bbrz]

That negative G push-over at 0:43 is impressive! Anyone pulled that off in our DCS Hornet? If so, what was your IAS?

Yes. Just tried and the maximum negative G load I can achieve is at ~330kias. Climbing with a pitch attitude of around 60deg and pushing the nose to level flight results in a close to -3G push over with a similar pitch rate.

Edited August 14, 2019 by bbrz
edited after doing a few tests

[razo+r]

(Swiss Hornets have a FCS Upgrade as far as I am aware so what they can pull of might not be possible with ours)

[wilbur81]

By the way, the "Swiss" Hornet is Finnish. ;)

 

Yikes!! My bad. Sorry, Fins. :)

[wilbur81]

Yes. Just tried and the maximum negative G load I can achieve is at ~330kias. Climbing with a pitch attitude of around 60deg and pushing the nose to level flight results in a close to -3G push over with a similar pitch rate.

 

Sheesh... at 330 kts? That seems pretty fast to get that kind of negative pitch...doesn't look that fast in the video; I'd think that kind of nose rate at that speed would make the pilot's eyes explode!

[5e EVC Chappy]

Yes. Just tried and the maximum negative G load I can achieve is at ~330kias. Climbing with a pitch attitude of around 60deg and pushing the nose to level flight results in a close to -3G push over with a similar pitch rate.

Sounds painful.

 

Sent from my CLT-L04 using Tapatalk

[bbrz]

Most aerobatic planes are designed to at least +10/-10G (the MXS to +14/-14G) and -6Gs aren't unusual during an aerobatic sequence. That's really painful.

[wilbur81]

Most aerobatic planes are designed to at least +10/-10G (the MXS to +14/-14G) and -6Gs aren't unusual during an aerobatic sequence. That's really painful.

 

True for an extra 300, but the Hornet doesn't do those negative g numbers, if I understand correctly.

[bbrz]

Of course not. That was just a comment because Chappy197606 mentioned that -3G must be painful.

[SUBS17]

Many of you have probably seen this Finnish Hornet demo on YouTube:

 

 

That negative G push-over at 0:43 is impressive! Anyone pulled that off in our DCS Hornet? If so, what was your IAS at the moment of forward stick?

 

That is just lowering the nose prior to a pull up and then something else, it is not negative g.:smilewink:

[bbrz]

R U sure? Have you checked the pitch rate?

[atazar]

I would not like to have that guy in dog fight in real life as an enemy, but in simulation I would love to:)

[wilbur81]

That is just lowering the nose prior to a pull up and then something else, it is not negative g.:smilewink:

 

Nonsense. That pushover at 0:43 would absolutely be producing negative g... and be rather uncomfortable.

[mkosmo]

That is just lowering the nose prior to a pull up and then something else, it is not negative g.:smilewink:

Lowering the nose with an acceleration greater than 1g will produce negative a negative g load.

[SUBS17]

You can do all of those moves with the DCS Hornet.:lol:

[SkateZilla]

Pretty sure Swiss/Finnish Hornets also have solid wings now, which enables higher Gs, plus custom FCS Adjustments.

[razo+r]

If you mean non-foldable with solid wings then you are wrong. Swiss ones can still fold them.

[Preendog]

A motionless airplane that rapidly pitches down will still cause a negative G for the pilot.

 

This is because the pilot sits on the front of the plane, in front of the center of gravity. The acceleration the pilot feels is centripetal (being swung around a circle), not due to load.

 

A G training centrifuge works the same way. The centrifuge rotates, but it does not actually go anywhere (despite how cool that would be).

 

If my math is right, a pitch-down of 30 degrees per second would cause about 1 G on it's own.

 

edit: In a plane this is 1G outward, not downward. So, not blackout-Gs, but eyeball-pulling and seatbelt-pulling Gs.

Edited August 17, 2019 by Preendog

[wilbur81]

You can do all of those moves with the DCS Hornet.:lol:

 

Give us a video, then. :music_whistling:

 

I've tried to replicate such a pitch over... even with the G-limit override engaged... the negative pitch of the nose seems uber-sluggish in every flight regime...making the Finnish Hornet look like an F-22 in some ways compared to our DCS jet. Maybe Skate is right.

[SUBS17]

Some cool moves here:

 

https://www.youtube.com/watch?v=26s1fDrdoXA

 

Very extreme.:thumbup:

[bbrz]

Some cool moves here

Please, this is an aircraft and it performs maneuvers, there are no 'moves' or 'cool moves'!

 

Btw, you still didn't explain how you got to the no negative G conclusion.

[bbrz]

I've tried to replicate such a pitch over... even with the G-limit override engaged... the negative pitch of the nose seems uber-sluggish in every flight regime...

Just tried to fly the initial part of the Finnish sequence and didn't notice a significant difference, let alone uber-sluggishness.

 

Taking off with approx 75% internal fuel (to match the acceleration rate on take off), using the same full aft stick after 7sec, results in the same rotation speed/time.

 

Selecting the gear up, flaps auto and accelerate for the same 13sec at ~10deg pitch attitude results in ~300kts at the start of the pull up.

 

Climb at around 70° pitch attitude for 8sec and starting the push over at ~290kts.

 

Time to level flight 4-5sec (depending on the speed at the start of the push over).