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Search: Posts Made By: helibuoy73
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Forum: Rotorheads
20th Oct 2011, 22:57
Replies: 96
Views: 39,226
Posted By helibuoy73

3odeg C, SL, assured max tq you can get from the...

3odeg C, SL, assured max tq you can get from the eng - 73% Not 81%

The 30 min and 2.5 min are more like txn limits and not eng limits. The max tq eng is assured (guaranteed) to produce is tgt tq...
Forum: Rotorheads
20th Oct 2011, 15:44
Replies: 96
Views: 39,226
Posted By helibuoy73

Ashfaq, Practical application of tgt torque...

Ashfaq,

Practical application of tgt torque IMHO. If you have an OEI at high torque settings, one of the first actions would be to lower collective to restore / maintain rpm.
Lower, but how...
Forum: Rotorheads
20th Dec 2010, 08:52
Replies: 161
Views: 57,554
Posted By helibuoy73

Holds good for Alouette III. Have no idea about...

Holds good for Alouette III. Have no idea about the Alouette II.
Forum: Rotorheads
19th Dec 2010, 13:28
Replies: 161
Views: 57,554
Posted By helibuoy73

Alouette III Rotor Engagement

As I remember it, flew about 3 yrs back, engagement has to be achieved in 35 to 45 seconds (25 to 35 seconds in gusty winds).
Idling rpm should be 16,000 to 19,000 rpm. Advance FFCL slowly and...
Forum: Rotorheads
13th Nov 2010, 02:32
Replies: 10
Views: 6,477
Posted By helibuoy73

Autorotation is one. Strong Crosswinds at...

Autorotation is one.

Strong Crosswinds at hover is another.

Another aspect is when rt rdr (say +ve angle) changes to lt rdr, the angle does not necessarily change to -ve. The rudders neutral...
Forum: Rotorheads
4th Oct 2010, 13:58
Replies: 96
Views: 39,226
Posted By helibuoy73

Aser, Thanks. Very interesting. HB

Aser,

Thanks. Very interesting.

HB
Forum: Rotorheads
27th Sep 2010, 14:08
Replies: 96
Views: 39,226
Posted By helibuoy73

L/D. Cruise at say 75% tq. Beep down Nr to say...

L/D. Cruise at say 75% tq. Beep down Nr to say 97%, tq reduces, inc pitch to get same tq 75%. You now get a higher speed. This led me to the conclusion reduced Nr is good for the L/D. Conversely Inc...
Forum: Rotorheads
27th Sep 2010, 04:10
Replies: 96
Views: 39,226
Posted By helibuoy73

Jim, Thanks for the detailed reply. ...

Jim,

Thanks for the detailed reply.



We are adjusting RTOW/RLW for drop down ht, as advocated by the RFM CatA supplement.
Drop down ht 90Ft or more, std WAT graph for Cat A Part A...
Forum: Rotorheads
26th Sep 2010, 08:51
Replies: 96
Views: 39,226
Posted By helibuoy73

Jim, I think there is a difference in the...

Jim,

I think there is a difference in the Tgt Tq that we're discussing.
The tgt tq I'm talking about is the OEI tgt tq. The tq that the healthy engine is guaranteed to provide, if the eng...
Forum: Rotorheads
25th Sep 2010, 13:14
Replies: 96
Views: 39,226
Posted By helibuoy73

Thanks Jim, Your explanation confirms my...

Thanks Jim,

Your explanation confirms my understanding.
As I understand, PC1 offshore, with ltd winds and high temps, average drop down from low floaters to 90-100 ft, the RTOW/RLW limiting...
Forum: Rotorheads
25th Sep 2010, 09:36
Replies: 96
Views: 39,226
Posted By helibuoy73

Jim, Thanks for the link pointer. A very...

Jim,

Thanks for the link pointer. A very enlightening thread indeed!

If you could just indulge me a little longer- Shouldn't an increase in Tgt Tq result in an increase in RTOW/RLW for PC1?
...
Forum: Rotorheads
25th Sep 2010, 03:43
Replies: 96
Views: 39,226
Posted By helibuoy73

Wouldn't it be nice if you could carry an extra...

Wouldn't it be nice if you could carry an extra passenger or two (safely and legally complying with all local regulations)?

There is a good deal of difference between 11,000lbs and 11,900lbs.
Forum: Rotorheads
25th Sep 2010, 03:37
Replies: 96
Views: 39,226
Posted By helibuoy73

Cat A

The RFM does not say that for Perf Class I, the limiting factor is Segment 1. I was just saying what it defines 'Segment 1' as.

Power / Torque required is max in Segment 1, that is why I think...
Forum: Rotorheads
24th Sep 2010, 04:47
Replies: 96
Views: 39,226
Posted By helibuoy73

Cat A

I'm afraid that's not correct for Bell412.
RFM states
Forum: Rotorheads
23rd Sep 2010, 04:30
Replies: 96
Views: 39,226
Posted By helibuoy73

Well, I would agree to this for Performance Class...

Well, I would agree to this for Performance Class 2, not for performance Class 1.
For Perf Cl 1, the limiting factor should be segment 1 ie; pickup - hover - OGE - TDP (Rotation). Therefore the RTOW...
Forum: Rotorheads
22nd Sep 2010, 05:18
Replies: 96
Views: 39,226
Posted By helibuoy73

Cat A

Shawn & Prehar,

Well here goes:

I had raised a query with Bell in Feb2009 as follows:


The basic RFM for
Bell 412 EP lays
down the engine torque limit of 81% for 2.5' OEI
Forum: Rotorheads
21st Sep 2010, 04:38
Replies: 96
Views: 39,226
Posted By helibuoy73

Cat A

Absolutely!
My question remains, if the tgt tq has been revised (upwards), shouldn't there be a corresponding revision in the permissible RTOW?
Forum: Rotorheads
19th Sep 2010, 05:17
Replies: 96
Views: 39,226
Posted By helibuoy73

Trog, Yeah Medical every mng (at least on...

Trog,

Yeah Medical every mng (at least on paper) ;)

I'm looking for other places, but not been able to get my foot in, so far!

helibuoy
Forum: Rotorheads
18th Sep 2010, 15:02
Replies: 96
Views: 39,226
Posted By helibuoy73

Cat A

Thanks a ton Trog,

The basic difference is that where I'm operating right now ie; India, the DGCA has mandated that all offshore ops have to be Performance Class I (in vogue for more than 4yrs...
Forum: Rotorheads
18th Sep 2010, 07:44
Replies: 96
Views: 39,226
Posted By helibuoy73

CAT A Ops

My understanding is that for say Sea Level, 30deg C, deck at or above 90 ft ht when tgt tq was 67%, max Restd AUW was (and is) 11000 lbs.

Now that the tgt tq has increased to 73%, shouldn't there...
Forum: Rotorheads
18th Sep 2010, 05:32
Replies: 96
Views: 39,226
Posted By helibuoy73

CAT A Ops

No, not Part C. My concern is Part A (Elevated helipads) for offshore ops.
Forum: Rotorheads
10th Sep 2010, 11:51
Replies: 19
Views: 6,146
Posted By helibuoy73

Unable to open the pilot-ebook.com link / page!...

Unable to open the pilot-ebook.com link / page! Can someone help?:ugh:
Forum: Rotorheads
10th Sep 2010, 11:27
Replies: 96
Views: 39,226
Posted By helibuoy73

Target Torque

Hi! Picking up an old thread.
At Sealevel 30degC, I thought the chances would be brighter for a drop in Nr as a result of N1 topping before anything else. Otherwise Tgt Tq of 67 or 73% wouldn't...
Forum: Rotorheads
6th Sep 2010, 05:12
Replies: 498
Views: 268,997
Posted By helibuoy73

Waiting Time

Hi!Just wanted to check, how much time do they normally take to contact you after initial application on their website? If they choose to contact you that is?
Showing results 1 to 24 of 24


 
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