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Helmets - Should you? and Which?

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Helmets - Should you? and Which?

Old 25th Nov 2013, 01:13
  #901 (permalink)  
 
Join Date: Jun 2012
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Using my helmet in a R22 or R44 is kind of a problem, as the low RRPM warning horn gets so muffled by the sound isolation of the helmet, that it's hardly noticeable. Therefore I prefer not to use a helmet on these aircrafts as I worry I won't hear the horn in a low RRPM situation. Is there any solution to it?
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Old 25th Nov 2013, 04:22
  #902 (permalink)  
 
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I see in Shell Brunei's AW 139 delivery video that the pilots are wearing helmets....
Yes we are
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Old 25th Nov 2013, 10:02
  #903 (permalink)  

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Vmax8
Using my helmet in a R22 or R44 is kind of a problem, as the low RRPM warning horn gets so muffled by the sound isolation of the helmet, that it's hardly noticeable. Therefore I prefer not to use a helmet on these aircrafts as I worry I won't hear the horn in a low RRPM situation. Is there any solution to it?

I don't think a helmet gives much more 'muffling' than a decent headset, does it?
Anyway, it would seem after a bit of a google, that it isn't too much of a problem out there heli-college.com however, perhaps there are some other issues that may need attention first !!!

"... one day I had a solo flight to OKC for maintanance, and had my music cranked up a little louder than when I have pax with me (not excessivly loud) and was surprised that I could barely hear the horn on my check. "

Helmet Comms - Vertical Reference Helicopter Forums


On a more serious and useful note, I wonder what the follow up on this was;

The FAA Technical Panel Final Report (17 March 1995) proposed the following:
Design Changes
An improved engine RPM governor
An increased low rotor RPM warning threshold.
Provide low rotor RPM warning horn through the intercom system.
http://www.aaiu.ie/sites/default/fil...4%20EI-MAC.pdf
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Old 25th Nov 2013, 12:43
  #904 (permalink)  
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Using my helmet in a R22 or R44 is kind of a problem, as the low RRPM warning horn gets so muffled by the sound isolation of the helmet, that it's hardly noticeable. Therefore I prefer not to use a helmet on these aircrafts as I worry I won't hear the horn in a low RRPM situation. Is there any solution to it?
I never had that problem, flown with gentex and MSA Gallet helmets
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Old 25th Nov 2013, 14:17
  #905 (permalink)  
 
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Lots of people flying and training in the R22 with helmets -



Helicopter License & Training Perth - Rotorvation Helicopter Services



I see in Shell Brunei's AW 139 delivery video that the pilots are wearing helmets....
A lot of pilots in GOM fly with helmets including some of PHI's S92 crews.
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Old 25th Nov 2013, 15:48
  #906 (permalink)  
 
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Students at a certain large flight school in the US are required to bear bicycle helmets during certain portions of the pre-flight.....
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Old 25th Nov 2013, 17:55
  #907 (permalink)  
 
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139's for Shell Brunei

Originally Posted by Brilliant Stuff View Post
I see in Shell Brunei's AW 139 delivery video that the pilots are wearing helmets....
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Old 25th Nov 2013, 19:22
  #908 (permalink)  
 
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I thought the Heli-Cycle only had one seat?
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Old 25th Nov 2013, 19:42
  #909 (permalink)  
 
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Originally Posted by African Eagle View Post
Lots of people flying and training in the R22 with helmets -
But none of a normal size, eg 5'11" since there isn't enough headroom.

You don't get in an R22, you put it on......
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Old 26th Nov 2013, 17:25
  #910 (permalink)  
 
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Vmax8
Quote:
Using my helmet in a R22 or R44 is kind of a problem, as the low RRPM warning horn gets so muffled by the sound isolation of the helmet, that it's hardly noticeable. Therefore I prefer not to use a helmet on these aircrafts as I worry I won't hear the horn in a low RRPM situation. Is there any solution to it?

I don't think a helmet gives much more 'muffling' than a decent headset, does it? [IMG]file:///CUsers\taper\AppData\Local\Temp\msohtmlclip1\01\clip_image 001.gif[/IMG]



If a warning horn is not properly audible when putting your helmet to its correct use, then the problem lies with the audio warning design, not the helmet. The helmet is designed to provide passive attenuation to a given specification, and active attenuation if ANR is fitted. The helmet is part of, for example, the intercom system, which is part of the aircraft, and all must be properly integrated. Few are, as you’ve discovered.




By design, a typical aircrew helmet, say the Mk4, will provide better passive attenuation than a headset. Attenuation is frequency dependent. The crucial area is low frequency (defined as 40 – 1kHz), where attenuation tends to vary a lot often due to ill-fitting helmets. Performance tends to be much better in the high frequency (above 1kHz) but this is not where the problem is (i.e. damaging noise, as opposed to annoying noise - a different but related subject). Hence, most ANR systems are designed to work in that lower region.
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Old 26th Nov 2013, 17:55
  #911 (permalink)  
 
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African Eagle posted that nice link to a training company in Perth. The reality is you can not fly like this for most of the year or you'd cook.

Doors on,helmet on but short shirt! The picture is posed.
Hence the reality of flying with the same training organisation here

and here we see no Kaptain Klown kit or doors.
That's how it is in Perth
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Old 11th Feb 2014, 19:51
  #912 (permalink)  
 
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Northwall helmets

If anyone is going to buy this helmet make sure they look at the Facebook on safecomm who sells this helmet. Reading that scares me and I would run from this and find a better company to buy from .
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Old 17th Mar 2014, 10:06
  #913 (permalink)  
 
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Alpha to Gallet

I am changing my Alpha to a Gallet at the moment. Having the Gallet fitted with the latest Senheiser set-up. Really for the sake of size, weight and an upgrade on the type of NR. So my Alpha-200 is up for grabs at the moment if anyone is interested.
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Old 22nd Apr 2014, 19:06
  #914 (permalink)  
 
Join Date: Apr 2013
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EVO 252?

So, I finally decided to get myself a bonedome. I have almost decided on a Gallet LH250, when I came accross a thing called "Evolution 252". It's a brand new helmet, released in April 14. Looks pretty neat, is lighter and cheaper than the Gallet.

Has anyone bought the EVO, or at least seen it up close? I have to make up my mind quickly...

Thanks!

C*
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Old 22nd Apr 2014, 20:50
  #915 (permalink)  
 
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Im in the same boat - the 252 looks nice, but unproven...

Anyone played with one? I spoke to the guys at helicopter helmets.com and they say that it is sort of a cross between the Gallet and Alpha (with the best features of both. Looks nice and good value, but I can't see an ANR option for it so will probably go for the SPH 4B. I have heard that the SHP4/5's are the coolest wearing option (temperature I mean)..
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Old 22nd Apr 2014, 23:13
  #916 (permalink)  
 
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Originally Posted by Jelico View Post
Looks nice and good value, but I can't see an ANR option for it so will probably go for the SPH 4B.
Jelico,

I'm guessing that as a Kiwi you will be looking at a helmet for use doing doors off work? If so, you may well find that ANR is worse than useless with the raised ambient noise doors off; the ANR often overloads and creates too much noise rather than reducing it.

CEP is much, much better for most helmets.
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Old 24th Sep 2014, 09:14
  #917 (permalink)  
 
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Hi Guys,
I am about to undertake some filming from a Jet Ranger and it has been suggested to me by the Production's Insurance Company that I wear a helmet.
I was just wondering where the most cost effective place is to buy a standard Alpha Helmet?
The obvious outlet is HSL but is there anywhere else with a more competitive price?
Would you stay clear of a cheaper, used helmet from eBay?
Your advice would be appreciated.
Many thanks.
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Old 24th Sep 2014, 09:21
  #918 (permalink)  
 
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the first choice would be new from a dealer, but ebay have some good bargains.

I basically were a helmet for any low level work <500ft
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Old 24th Sep 2014, 11:13
  #919 (permalink)  
 
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I bought mine from HSL.

Personally I'd avoid cheap second hand helmets, but if money is an issue I guess something is better than nothing.

It's hard to put a price on the value of your own head!
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Old 3rd Apr 2015, 14:11
  #920 (permalink)  
 
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Oxygen masks + Helmets

Does anyone have experience with oxygen masks fitted to helmets in civvy applications? I'm involved in a project where we are doing aerial photography and filming from a range of altitudes from sea level to 14k, mostly at night. While 14k's not up in the flight levels, we still need o2. Additionally, as for a lot of the missions we are operating door-off and photographer in harness, we've been looking into helmets for photographer and technician, for crash protection (they are on short tethers instead of secured with seatbelt) as well as birdstrike protection, and for better comms when one's head is out in the airstream.

I've seen the Gentex MBU-12/P masks (Pressure Demand) as well as the ALPS-M (Constant Flow). The Gentex is of course designed to work with helmets, but the pressure demand system is massive overkill for what we need. The ALPS-M system doesn't seem to work well with helmets, or at least would have to be donned separately.

What are helmet-wearers doing for oxygen (besides cannulas) in helicopters? Cannulas aren't an option as they wouldn't fare well in the door-off and moving-around environment.

EDIT: Found some information about ALPS-M conversion for helmet usage ( http://www.mhoxygen.com/index.php/co...s/download/645 ). Any feedback on these or other systems?

Last edited by MikeNYC; 3rd Apr 2015 at 14:25.
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