PPRuNe Forums - Search Results

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

 
Search: Posts Made By: henra
Showing results 1 to 25 of 827
Search took 0.13 seconds.
26th May 2020, 18:56
Replies: 896
Views: 1,223,955
Posted By henra

Hmm, with Flaps 3 that could probably be doable....

Hmm, with Flaps 3 that could probably be doable. Leaving decelleration aside that would be a glide ratio of 15. That's about what the Bus would do in clean config at that speed. With Slats and flaps...
26th May 2020, 14:50
Replies: 896
Views: 1,223,955
Posted By henra

A teardrop maneuver might have been the ticket to...

A teardrop maneuver might have been the ticket to a possible survival in this case. Gear up is a good question. Dpends also when they did extend it. If it was down during the whole circuit it could...
26th May 2020, 09:51
Replies: 896
Views: 1,223,955
Posted By henra

This was tested before with pretty much the same...

This was tested before with pretty much the same survival time of the engines. 90s.
We seem to find volunteers for all imaginable and also for the unimaginable mishap scenarios.
In 2018 Smartlynx...
26th May 2020, 07:36
Replies: 896
Views: 1,223,955
Posted By henra

Have you seen the speeds in the above charts? At...

Have you seen the speeds in the above charts? At 220 kts there will be no sink if you pull that nice little handle on the side panel (not with flaps in 3,2,1, or clean). That's so much energy that...
25th May 2020, 12:19
Replies: 896
Views: 1,223,955
Posted By henra

That also crossed my mind... I'm always alerted...

That also crossed my mind...
I'm always alerted when there are fixed fines defined for cases where in reality the world can be more complex. I do understand that if the requirement is to be...
25th May 2020, 08:27
Replies: 896
Views: 1,223,955
Posted By henra

Hmmm, dunno. Are we really discussing about...

Hmmm, dunno. Are we really discussing about making airliners tolerant against landing on the engines and still being able to fly away afterwards???
How about not landing on the pods in the first...
24th May 2020, 17:13
Replies: 896
Views: 1,223,955
Posted By henra

No, looking at the discrete data your maths do...

No, looking at the discrete data your maths do look correct. It is easy to misjudge the timings from the graphs a bit, which I obviously did.
OK, 1700fpm seems reasonable. That should be roughly...
24th May 2020, 16:19
Replies: 896
Views: 1,223,955
Posted By henra

No I won't call you an accident waiting to...

No I won't call you an accident waiting to happen. It is fine as long as you have got enough space and time left for the final approach to dissipate the energy and stabilise and don't have to rush...
24th May 2020, 15:14
Replies: 896
Views: 1,223,955
Posted By henra

Maybe they tried to lower the gear even earlier,...

Maybe they tried to lower the gear even earlier, e.g. already during the steep descent from 10k? At that altitude and looking at the general descent profile, 260kts would not appear completely...
24th May 2020, 15:10
Replies: 896
Views: 1,223,955
Posted By henra

It is surely on the high side. Would have been OK...

It is surely on the high side. Would have been OK if they had space to dissipate the energy for the final approach. But with that descent rate even with engines at idle you will arrive at 10k on the...
24th May 2020, 13:02
Replies: 896
Views: 1,223,955
Posted By henra

Wow!. From 35k to 10k ft in <13minutes. And...

Wow!.
From 35k to 10k ft in <13minutes. And then from 10k to 2k in less than two minutes. Somehow this f*ck up bgean to start already back at 35k. And from 10k on it became worse. How on Earth did...
23rd May 2020, 14:25
Replies: 896
Views: 1,223,955
Posted By henra

May I remind you of these words once the final...

May I remind you of these words once the final report is out?

Those cowlings are only thin covers. Underneath is the massive structure designed to contain fan/turbine blades in case of separation....
23rd May 2020, 13:35
Replies: 896
Views: 1,223,955
Posted By henra

You might want to have a closer look at the...

You might want to have a closer look at the picture in post #85
https://www.pprune.org/showthread.php?p=10790064
If you look at the nacelles it is clear this wasn't just an oil leak. They are torn...
23rd May 2020, 12:17
Replies: 896
Views: 1,223,955
Posted By henra

There are Oil lines, pumps, generators,...

There are Oil lines, pumps, generators, manifolds, etc. on the bottom of the nacelles. A touchdown on the pods bears a big risk of severing oil lines. The resulting oil loss leading to freezing of...
Forum: Rotorheads
2nd Mar 2020, 19:08
Replies: 33
Views: 5,378
Posted By henra

Just a bit nitpicking but your last picture shows...

Just a bit nitpicking but your last picture shows an Agusta A-129 Mangusta, not a Tiger
Forum: Rotorheads
31st Jan 2020, 18:22
Replies: 756
Views: 787,896
Posted By henra

Honest question: Do you see any indication in...

Honest question: Do you see any indication in this pattern (from level flight to -5000fpm at 150kts+ in 15s) which would indicate anything else other than LOC (in the extended sense that it was not...
Forum: Rotorheads
27th Jan 2020, 19:22
Replies: 756
Views: 787,896
Posted By henra

[/list] Hint: The NTSB Accident database is...

[/list]
Hint: The NTSB Accident database is full of this kind of accidents. In the case of high performance aircraft (both Helo and plank) this pattern ranks very high among the top causes for fatal...
Forum: Rotorheads
6th Dec 2019, 18:55
Replies: 33
Views: 7,518
Posted By henra

After @RotorBunny has shown his hand can we now...

After @RotorBunny has shown his hand can we now see yours?
Forum: Rotorheads
17th Nov 2019, 10:10
Replies: 168
Views: 66,047
Posted By henra

That actually depends quite a bit on flow...

That actually depends quite a bit on flow direction and Reynolds number :E
Forum: Rotorheads
17th Nov 2019, 08:27
Replies: 168
Views: 66,047
Posted By henra

Find the error.... Aerodynamics by looking...

Find the error....

Aerodynamics by looking at pictures.
Scrap all CFD and wind tunnel....

Folks never cease to amaze me.
Forum: Rotorheads
6th Nov 2019, 19:05
Replies: 71
Views: 60,369
Posted By henra

If you look at the construction of the Puma you...

If you look at the construction of the Puma you will find a significant difference in solidity of the 'greenhouse' front office to the rest of the fuselage.
Forum: Rotorheads
4th Nov 2019, 18:25
Replies: 71
Views: 60,369
Posted By henra

If we look at the break line of the cockpit...

If we look at the break line of the cockpit section I would say we can pretty much rule this out. Even ignoring that we are not talking about a teetering rotor the typical Robby cut line looks...
Forum: Rotorheads
4th Nov 2019, 18:21
Replies: 71
Views: 60,369
Posted By henra

Looking at the damage (Cockpit section...

Looking at the damage (Cockpit section longitudinally crushed) this thing went in straight and fast with solid engine power turning the rotor at impact. Not spinning. And with enormous RoD.
Taking...
Forum: Rotorheads
3rd Nov 2019, 10:36
Replies: 71
Views: 60,369
Posted By henra

Looking at the circumstances I would bet so....

Looking at the circumstances I would bet so. Takeoff from a lighted helipad into the pitch black night over sea. End of flight just 2 minutes after takeoff.
Even with all the gizmos on board Occam's...
Forum: Rotorheads
27th Oct 2019, 22:07
Replies: 14
Views: 3,393
Posted By henra

That's nothing compared to the 270.000.000+ the...

That's nothing compared to the 270.000.000+ the Canadians are paying for each of their CH-148.
Now that's expensive!
Showing results 1 to 25 of 827
 


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.