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Search: Posts Made By: [email protected]
Showing results 1 to 35 of 45
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Forum: Rotorheads
24th Mar 2017, 10:59
Replies: 877
Views: 454,119
Posted By [email protected]

If they had just trimmed to the hover attitude,...

If they had just trimmed to the hover attitude, raised the lever to establish a reasonable rate of climb, waitied until they saw 100' on the rad alt and then adopted a gentle accelerative attitude...
Forum: Rotorheads
22nd Mar 2017, 14:59
Replies: 877
Views: 454,119
Posted By [email protected]

Yes, perhaps it should be 'Vmini when hand flown'...

Yes, perhaps it should be 'Vmini when hand flown' or similar - it's all a bit of a nonsense.
Forum: Rotorheads
22nd Mar 2017, 12:45
Replies: 877
Views: 454,119
Posted By [email protected]

The SAR modes will use other sensors (GPS,...

The SAR modes will use other sensors (GPS, accelerometers, inertial nav, even doppler) to give the speed which is why they are allowed to control TU/TD at low speed.

If the aircraft had a low...
Forum: Rotorheads
21st Mar 2017, 22:04
Replies: 877
Views: 454,119
Posted By [email protected]

Non-PCPlod - the Vmini will be mainly due to the...

Non-PCPlod - the Vmini will be mainly due to the inacuracies of thec pitot.static system since very few give IAS below 40 or so kts with any reliability and some airspeed tapes dont have any figures...
Forum: Rotorheads
21st Mar 2017, 14:52
Replies: 877
Views: 454,119
Posted By [email protected]

Ah, but you've been well trained SAS:ok:

Ah, but you've been well trained SAS:ok:
Forum: Rotorheads
21st Mar 2017, 06:43
Replies: 877
Views: 454,119
Posted By [email protected]

Ah, that is ex-mil Anglais, I don't think google...

Ah, that is ex-mil Anglais, I don't think google translate can turn that into spam;)
Forum: Rotorheads
20th Mar 2017, 21:24
Replies: 877
Views: 454,119
Posted By [email protected]

So then we come back to Geoffers point about rig...

So then we come back to Geoffers point about rig departures. We all know it happens and can be done quite safely but because of the way the RFM is written it is technically verboten.

No one is...
Forum: Rotorheads
20th Mar 2017, 09:20
Replies: 877
Views: 454,119
Posted By [email protected]

I don't think anyone is talking about doing a...

I don't think anyone is talking about doing a zero/zero IF take off without SAS or AP - again, not impossible but does need to be practised.

This crash was in a fully-IFR capable twin with more...
Forum: Rotorheads
19th Mar 2017, 22:39
Replies: 877
Views: 454,119
Posted By [email protected]

geoffers - yes it is a difficult issue but...

geoffers - yes it is a difficult issue but assumes if the RFM says Vmini is say 50 kts then it is not possible to fly the aircraft on instruments below that speed, something we all know is not true....
Forum: Rotorheads
19th Mar 2017, 18:31
Replies: 877
Views: 454,119
Posted By [email protected]

Absolutely correct - unfortunately I don't think...

Absolutely correct - unfortunately I don't think either of the pilots were off-shore trained.

Since the technique is used in civil flying as discussed, why is it not a basic part of the IR (either...
Forum: Rotorheads
19th Mar 2017, 16:39
Replies: 877
Views: 454,119
Posted By [email protected]

Rather an unnecessary jibe - the crew didn't say...

Rather an unnecessary jibe - the crew didn't say no and they didn't know how to depart the field safely.

A mil-style IF take off isn't a superior skill, it's very easy and very much safer than...
Forum: Rotorheads
19th Mar 2017, 14:38
Replies: 877
Views: 454,119
Posted By [email protected]

Thanks Overthawk:ok: Shy - no mention of...

Thanks Overthawk:ok:

Shy - no mention of military-style IF take offs - the only thing (other than not taking off) that might have prevented that accident.
Forum: Rotorheads
18th Mar 2017, 20:19
Replies: 877
Views: 454,119
Posted By [email protected]

Shy - I'm far too lazy to google it - could you...

Shy - I'm far too lazy to google it - could you post a link?:)
Forum: Rotorheads
21st Oct 2015, 08:00
Replies: 877
Views: 454,119
Posted By [email protected]

Sasless, having flown in UK, you know the answer...

Sasless, having flown in UK, you know the answer to most of those questions is NO.

Military aircraft fly around almost exclusively on UHF, Civil traffic is on VHF, getting anything other than a...
Forum: Rotorheads
20th Oct 2015, 21:08
Replies: 877
Views: 454,119
Posted By [email protected]

Geoffers - I agree but perhaps there needs to be...

Geoffers - I agree but perhaps there needs to be a clarification of what Vmini actually means.

It is sensible to have a minimum speed for cruise flight where the pitot system is accurate and the...
Forum: Rotorheads
20th Oct 2015, 20:05
Replies: 877
Views: 454,119
Posted By [email protected]

but it is just a FW IR profile flown in a...

but it is just a FW IR profile flown in a helicopter rather than something that reflects the realities of RW IFR.

We still have the same limits for NDB tracking as VOR despite the former (in all...
Forum: Rotorheads
20th Oct 2015, 17:59
Replies: 877
Views: 454,119
Posted By [email protected]

So we come back to this case where the helicopter...

So we come back to this case where the helicopter IR is clearly not fit for purpose - no flight below Vmini is ridiculous - the mil IR in many fleets specifies a low speed UP/UA recovery and an IF...
Forum: Rotorheads
20th Oct 2015, 12:10
Replies: 877
Views: 454,119
Posted By [email protected]

But this was a big mistake, fundamental to safely...

But this was a big mistake, fundamental to safely flying the helicopter, not a missed RT call or an incorrect altimeter setting.

Torquetalk - I presume when you say 'the AFCS can be engaged' you...
Forum: Rotorheads
20th Oct 2015, 06:04
Replies: 877
Views: 454,119
Posted By [email protected]

212man - I don't know about your AP but mine in...

212man - I don't know about your AP but mine in ATT mode (normal selection) copes very well with flapback, inflow roll and tuckunder in the transition from the hover.

My point is that you could...
Forum: Rotorheads
19th Oct 2015, 17:54
Replies: 877
Views: 454,119
Posted By [email protected]

212man - I am sure you are right about stability...

212man - I am sure you are right about stability and workload but the Vmini must also have something to do with the reliability and accuracy of the pressure instruments since few pitot systems are...
Forum: Rotorheads
19th Oct 2015, 16:10
Replies: 877
Views: 454,119
Posted By [email protected]

212man - pretty much what I thought and the same...

212man - pretty much what I thought and the same I would use departing from the back of a frigate or other grey-funnel liner.

There is therefore a disconnect between what is done in the real world...
Forum: Rotorheads
19th Oct 2015, 15:21
Replies: 877
Views: 454,119
Posted By [email protected]

212man - what visual references are you using in...

212man - what visual references are you using in the dark from a rig? If you are very lucky you might have enough starlight and moonlight to have the glimmer of a horizon but more often than not you...
Forum: Rotorheads
10th Oct 2015, 08:36
Replies: 877
Views: 454,119
Posted By [email protected]

No, FLIR doesn't see through fog and cloud. ...

No, FLIR doesn't see through fog and cloud.

The high moisture content of the foggy air acts like a blanket and attenuates thermal energy as well as visible light so everything looks grey to the...
Forum: Rotorheads
9th Oct 2015, 12:01
Replies: 877
Views: 454,119
Posted By [email protected]

Sir Niall - that is what I find so frustrating...

Sir Niall - that is what I find so frustrating about this accident - I know that the technique was used on the rigs so how is it that it doesn't feature in the civilian IR?

As you say - within the...
Forum: Rotorheads
9th Oct 2015, 06:11
Replies: 877
Views: 454,119
Posted By [email protected]

Sasless - it would seem that neither of these...

Sasless - it would seem that neither of these poor guys had ever been taught or shown a vertical departure on instruments because the system doesn't seem to recognise flight on instruments below...
Forum: Rotorheads
8th Oct 2015, 19:45
Replies: 877
Views: 454,119
Posted By [email protected]

Bucaneer Bill - what speculation? The evidence is...

Bucaneer Bill - what speculation? The evidence is there in black and white in the bulletin.

The only speculation is whether it was a somatogravic illusion or just inattention to the Attitude...
Forum: Rotorheads
8th Oct 2015, 18:12
Replies: 877
Views: 454,119
Posted By [email protected]

But those guys couldn't have done a CAT A (PC1)...

But those guys couldn't have done a CAT A (PC1) profile since they didn't have the clear area ahead nor a cleared helipad environment - and, unless I am mistaken, since they were operating as a...
Forum: Rotorheads
8th Oct 2015, 16:04
Replies: 877
Views: 454,119
Posted By [email protected]

Shame the one thing that would have prevented the...

Shame the one thing that would have prevented the accident - adequate training in vertical departure profiles on instruments - isn't a recommendation because everyone gets caught up in the Vmini...
Forum: Rotorheads
22nd Apr 2014, 07:36
Replies: 877
Views: 454,119
Posted By [email protected]

Inditrees - my comment was a riposte to BB's jibe...

Inditrees - my comment was a riposte to BB's jibe at dispersed SAR flts not being very busy - my intent was to highlight that quantity is not a reliable indicator of quality as the NS safety record...
Forum: Rotorheads
20th Apr 2014, 20:20
Replies: 877
Views: 454,119
Posted By [email protected]

Yes, but we were talking about transporting...

Yes, but we were talking about transporting people Safely:E
Forum: Rotorheads
20th Apr 2014, 09:46
Replies: 877
Views: 454,119
Posted By [email protected]

tistisnot - Hmmmmm... who is it that does the...

tistisnot - Hmmmmm... who is it that does the majority of UK SAR work both over land (well below 3000') and over the sea??????? Oh yes, that will be the RAF then - 6 SAR flights compared to 4 for...
Forum: Rotorheads
18th Apr 2014, 04:50
Replies: 877
Views: 454,119
Posted By [email protected]

RWandB, thanks for your post, it clarifies much...

RWandB, thanks for your post, it clarifies much of what I had thought - but presumably the issue isn't confined to the 139 as many other helos probably have a similar VminI in their RFMs?

Bob - ...
Forum: Rotorheads
17th Apr 2014, 16:17
Replies: 877
Views: 454,119
Posted By [email protected]

So for offshore ops, you can operate down to 250m...

So for offshore ops, you can operate down to 250m vis for your rig departure (presumably not at night) and fly a PC1 profile to TDP before transitioning?

In vis of 250m as you transition into...
Forum: Rotorheads
16th Apr 2014, 03:40
Replies: 877
Views: 454,119
Posted By [email protected]

Tees - exactly what I am getting at - can you fly...

Tees - exactly what I am getting at - can you fly on instruments below 50 kts or not?

The doppler is just a handy way of confirming that your attitude plus power is giving you the desired...
Forum: Rotorheads
15th Apr 2014, 22:04
Replies: 877
Views: 454,119
Posted By [email protected]

It says minimum speed on instruments. The...

It says minimum speed on instruments.

The semantics around IFR or IMC seems to be a deliberate way to avoid the real question - can you fly below 50 kts by sole reference to instruments or can't...
Showing results 1 to 35 of 45
 
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