Agusta AW139
You're welcome.
One should just enjoy the pictures, cause the reporter managed to fill the short documentary with lots of errors, like talking about the A109 and showing the A119, saying the EH101 is having a max range of 250NM and it being the only triple-engined helicopter worldwide
One should just enjoy the pictures, cause the reporter managed to fill the short documentary with lots of errors, like talking about the A109 and showing the A119, saying the EH101 is having a max range of 250NM and it being the only triple-engined helicopter worldwide
Looks like the forward sliding cowl wasn't latched properly. Early helicopters had a sliding cowling that tucked in behind the swashplate. To slide the cowling forward, you first had to open an access door at the top on each side, otherwise the cowl would hit the swashplate. The cowling was redesigned quite early on so that these doors weren't needed anymore. Those little doors really were a pain in the
Join Date: Mar 2008
Location: BWI
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
139 operators above 12,000 ft
Anyone operating with supplemental oxygen for pilots and engineer's ? We have a need for this and would like some input, please. Anyone ?
Last edited by copterdr76; 4th Aug 2009 at 19:59.
Aga Khan Development Network in Tajikistan were using the Mountain High EDS portable O2 system when I was there a few years back. Bottle was strapped to the back of the pilots seat. With Mountain High, you can get distribution boxes that will allow a couple of cannulas or masks to be used off of one bottle. Have a look at the Mountain High website:
Mountain High Aviation Oxygen Systems
And because they are pulse/demand systems instead of constant flow, you get more duration out of your bottle. I've used them alot gliding. Cannulas aren't certified above 18000 feet in most countries though, so I carry a mask as well.
Hope that points you in the right direction.
Mountain High Aviation Oxygen Systems
And because they are pulse/demand systems instead of constant flow, you get more duration out of your bottle. I've used them alot gliding. Cannulas aren't certified above 18000 feet in most countries though, so I carry a mask as well.
Hope that points you in the right direction.
Join Date: Aug 2009
Location: borneo
Age: 69
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Augusta AW 139 pictures
Hello all first time here.
I have been asked to put together a presentation on the electrical system of the AW 139.
In order to construct some of the 3d models ,I need to reference some pictures of the main electrical components,.these being the Generator ,GCU , both Batteries ,overhead switch panel and the Engine quadrant .
I have searched the web but have not been able to find any photos of these items anywhere , also as they do not operate in this country I cannot to take any pictures myself.
Thank you very much for your time and consideration.
Spyman 2009
I have been asked to put together a presentation on the electrical system of the AW 139.
In order to construct some of the 3d models ,I need to reference some pictures of the main electrical components,.these being the Generator ,GCU , both Batteries ,overhead switch panel and the Engine quadrant .
I have searched the web but have not been able to find any photos of these items anywhere , also as they do not operate in this country I cannot to take any pictures myself.
Thank you very much for your time and consideration.
Spyman 2009
Join Date: Feb 2008
Location: Kill Box 85CJ
Posts: 49
Likes: 0
Received 0 Likes
on
0 Posts
Battle Damage
Anyone had to do composite repairs yet? Just wondering if a few holes (non structural) are a show stopper or if they can be repaired in short order.
Thanks
Thanks
Join Date: Sep 2001
Location: Canada
Posts: 158
Likes: 0
Received 0 Likes
on
0 Posts
6800 kg Op limits
Hey all:
Just heard from internal sources that Agusta has changed the operating temperature limit for the AW139 for 6800 kg ops, especially the cold weather limit from -40 to -30C.
May not mean much for most of you but here in Northern Canada, that is a big difference.
Does anybody have any insight?
Thanks
Walter
Just heard from internal sources that Agusta has changed the operating temperature limit for the AW139 for 6800 kg ops, especially the cold weather limit from -40 to -30C.
May not mean much for most of you but here in Northern Canada, that is a big difference.
Does anybody have any insight?
Thanks
Walter
Join Date: Jul 2008
Location: Australia
Posts: 372
Likes: 0
Received 0 Likes
on
0 Posts
reduced flight operating temperatures
Given my comments on the tail failure thread, I am not surprised about the reduced temerature limits. The strength of adhesive bonds depends strongly on temperature, with lower temperatures causing higher stress at failure but also causing the adhesive to become very brittle. The overall strength of an adhesive depends on the area under the stress-strain curve, so even though the failure stress is higher, the lack of ductility means that the adhesive bond may be weaker. Combine that with a large number of micro-voids and the strength could become critical at low temperature. Therefore given their current issues with the Doha incident, a reduction of the operating envelope is prudent.
I am surprised that there are not weight restrictions as well, given the significant loss of strength which micro-voids cause.
Still haven't heard from AW.
Regards
Blakmax
I am surprised that there are not weight restrictions as well, given the significant loss of strength which micro-voids cause.
Still haven't heard from AW.
Regards
Blakmax
Join Date: Jul 2008
Location: Australia
Posts: 372
Likes: 0
Received 0 Likes
on
0 Posts
Effect of heat
ATPMBA wrote
Heat does have significant effects on adhesives. The stress to failure is lower, but the adhesive bcomes more ductile, and again remembering that the strength of the joint depends on the area under the strsss-strain curve, the adhesive load capacity is often slightly higher at elevated temperature. There is an upper limit to adhesive performance, known as the "Glass Transition Temperature". Above that temperature the adhesive passes from being a relatively hard glassy material to a soft, compliant rubbery material. Stength and performance fall away above that temperature. As a general rule, the higher the processing temperature for the adhesive the higher the Tg. My observation of the close-up photos I have seen indicate that AW used a film adhesive which means it was cured at least 120C (250F) and may have been cured as high as 175C (350F) in which case the Tg should be adequate even in the sand pit.
My observations from the photos is that there is extensive micro-voiding present in the samples I have seen. Micro voids occur when volatiles are released during cure of the adhesive during production. They cause a significant reduction in strength for lap-shear joints and I would expect a similar reduction in core to skin bond strength. I suspect that this may have contributed to the DOH failure.
Because of the number of causes of micro-voiding and the fact that this feature has been observed from two separate samples from two different areas of the boom, it is reasonable to expect that this may not be isolated to one aircraft and may not be isolated to only the disbond area from which the sample was taken.
Regards
blakmax
I think heat has an affect on bonding materials. The MidEast can be an oven.
My observations from the photos is that there is extensive micro-voiding present in the samples I have seen. Micro voids occur when volatiles are released during cure of the adhesive during production. They cause a significant reduction in strength for lap-shear joints and I would expect a similar reduction in core to skin bond strength. I suspect that this may have contributed to the DOH failure.
Because of the number of causes of micro-voiding and the fact that this feature has been observed from two separate samples from two different areas of the boom, it is reasonable to expect that this may not be isolated to one aircraft and may not be isolated to only the disbond area from which the sample was taken.
Regards
blakmax
Fascinating and informative discussion and information from many posters here. Cleared up a number of questions for me and for my future students. Thought you might like to see some of the other side of the 139's party pieces:
http://www.youtube.com/watch?v=b99a7jZ
Just in case all of the RFM and FMS / Composite discussion was getting a bit too much for you!
http://www.youtube.com/watch?v=b99a7jZ
Just in case all of the RFM and FMS / Composite discussion was getting a bit too much for you!