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viperdoc(at)mindspring.co
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 Posted: Thu Jan 05, 2012 1:37 pm Post subject: Helmets -Why use one? |
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The Gentex HGU- 55/P lightweight helmet was designed so the helmet assembly does not tear away from the head, loosen, or break during wind blast velocities of 450 knots (+/- 20 knots) KAS in the following attitudes: head on, 45 deg. Yaw right or left and 30 deg pitch to aft.
Penetration resistance: The helmet assembly limits a 16 oz. test bob from penetrating the helmet and energy absorbing liner not more than 0.25 inches from a drop height of 10 feet.
Visors: have been windblast and sled tested at 600 kts. They provide 99% UV protection.
Weight: Medium 2.23 lb, Large 2.37 lb, and X Large 2.48 lbs.
Now why do I wear a helmet when I am flying the YAK? I don’t know maybe it is because I have flown with this type helmet for the last 29.5 years up until my retirement a year ago. Have had my head banged off the canopy by some of the best hamfists in the AF at 7,8, and 9 G’s. My cranium stayed intact as did the squash contained within it without sending me to laula land and possibly my death.
I have inadvertently banged my head around in the 50 with an aggressive break turn a couple of times during some 1 V 1 engagements. My cranium still remains intact nor did I put myself to sleep.
Now since the human cranium on average weighs 32 lbs adding the additional 2.37 lbs is going to marginally increase the load on the cervical spine under G. Most in the community will pull 5 to 6 G’s but few will be pulling 9. So your cranium is going to weigh roughly 206.22 lbs as compared to a bare cranium weighing 192 lbs at 6 G’s. Now given that I can bailout at up to 450 +/-20 kts with my eyes and cranium better protected than in the raw along with knowing that 1 lb tree limb smacking me over the head as I penetrate the trees or that small bolder my head may bounce off of as I do my PLF leads me to feel more secure wearing the helmet vs. my bare cranium skinning through the trees and rocks.
But, as said before, you can fly in whatever attire you wish. It is your safety and your rosy pink ars.
Doc
[quote][b]
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GeorgeCoy
Joined: 02 Dec 2010
Posts: 310
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| Posted: Thu Jan 05, 2012 1:53 pm Post subject: Helmets -Why use one? |
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Speaking of bird strikes, In my 17000+ hrs in small piston aircraft I only had one bird strike. Unfortunately, the bird was sitting in his nest in a tree at the time. Fortunately his tree helped slow things down so we met the ground, we did not even get a stiff neck out of it.
George
[quote][b]
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czech6(at)mesanetworks.ne
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| Posted: Thu Jan 05, 2012 2:38 pm Post subject: Helmets -Why use one? |
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Beautiful.
Bill
On Jan 5, 2012, at 2:48 PM, "George Coy" <george.coy(at)gmail.com (george.coy(at)gmail.com)> wrote:
[quote] <![endif]--> <![endif]-->
Speaking of bird strikes, In my 17000+ hrs in small piston aircraft I only had one bird strike. Unfortunately, the bird was sitting in his nest in a tree at the time. Fortunately his tree helped slow things down so we met the ground, we did not even get a stiff neck out of it.
George
[b]
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William Halverson
Joined: 27 Feb 2010
Posts: 88
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cjpilot710(at)aol.com
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| Posted: Thu Jan 05, 2012 5:34 pm Post subject: Helmets -Why use one? |
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I could not have said it better.
Jim "Pappy" Goolsby
In a message dated 1/5/2012 4:37:29 P.M. Eastern Standard Time, viperdoc(at)mindspring.com writes:
| Quote: |
The Gentex HGU- 55/P lightweight helmet was designed so the helmet assembly does not tear away from the head, loosen, or break during wind blast velocities of 450 knots (+/- 20 knots) KAS in the following attitudes: head on, 45 deg. Yaw right or left and 30 deg pitch to aft.
Penetration resistance: The helmet assembly limits a 16 oz. test bob from penetrating the helmet and energy absorbing liner not more than 0.25 inches from a drop height of 10 feet.
Visors: have been windblast and sled tested at 600 kts. They provide 99% UV protection.
Weight: Medium 2.23 lb, Large 2.37 lb, and X Large 2.48 lbs.
Now why do I wear a helmet when I am flying the YAK? I don’t know maybe it is because I have flown with this type helmet for the last 29.5 years up until my retirement a year ago. Have had my head banged off the canopy by some of the best hamfists in the AF at 7,8, and 9 G’s. My cranium stayed intact as did the squash contained within it without sending me to laula land and possibly my death.
I have inadvertently banged my head around in the 50 with an aggressive break turn a couple of times during some 1 V 1 engagements. My cranium still remains intact nor did I put myself to sleep.
Now since the human cranium on average weighs 32 lbs adding the additional 2.37 lbs is going to marginally increase the load on the cervical spine under G. Most in the community will pull 5 to 6 G’s but few will be pulling 9. So your cranium is going to weigh roughly 206.22 lbs as compared to a bare cranium weighing 192 lbs at 6 G’s. Now given that I can bailout at up to 450 +/-20 kts with my eyes and cranium better protected than in the raw along with knowing that 1 lb tree limb smacking me over the head as I penetrate the trees or that small bolder my head may bounce off of as I do my PLF leads me to feel more secure wearing the helmet vs. my bare cranium skinning through the trees and rocks.
But, as said before, you can fly in whatever attire you wish. It is your safety and your rosy pink ars.
Doc
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[quote][b]
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mark.bitterlich(at)navy.m
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| Posted: Thu Jan 05, 2012 6:02 pm Post subject: Helmets -Why use one? |
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Yeah Doc, that was pretty freaking impressive.
________________________________
From: owner-yak-list-server(at)matronics.com on behalf of cjpilot710(at)aol.com
Sent: Thu 1/5/2012 8:27 PM
To: yak-list(at)matronics.com
Subject: Re: FW: Helmets -Why use one?
I could not have said it better.
Jim "Pappy" Goolsby
In a message dated 1/5/2012 4:37:29 P.M. Eastern Standard Time, viperdoc(at)mindspring.com writes:
The Gentex HGU- 55/P lightweight helmet was designed so the helmet assembly does not tear away from the head, loosen, or break during wind blast velocities of 450 knots (+/- 20 knots) KAS in the following attitudes: head on, 45 deg. Yaw right or left and 30 deg pitch to aft.
Penetration resistance: The helmet assembly limits a 16 oz. test bob from penetrating the helmet and energy absorbing liner not more than 0.25 inches from a drop height of 10 feet.
Visors: have been windblast and sled tested at 600 kts. They provide 99% UV protection.
Weight: Medium 2.23 lb, Large 2.37 lb, and X Large 2.48 lbs.
Now why do I wear a helmet when I am flying the YAK? I don't know maybe it is because I have flown with this type helmet for the last 29.5 years up until my retirement a year ago. Have had my head banged off the canopy by some of the best hamfists in the AF at 7,8, and 9 G's. My cranium stayed intact as did the squash contained within it without sending me to laula land and possibly my death.
I have inadvertently banged my head around in the 50 with an aggressive break turn a couple of times during some 1 V 1 engagements. My cranium still remains intact nor did I put myself to sleep.
Now since the human cranium on average weighs 32 lbs adding the additional 2.37 lbs is going to marginally increase the load on the cervical spine under G. Most in the community will pull 5 to 6 G's but few will be pulling 9. So your cranium is going to weigh roughly 206.22 lbs as compared to a bare cranium weighing 192 lbs at 6 G's. Now given that I can bailout at up to 450 +/-20 kts with my eyes and cranium better protected than in the raw along with knowing that 1 lb tree limb smacking me over the head as I penetrate the trees or that small bolder my head may bounce off of as I do my PLF leads me to feel more secure wearing the helmet vs. my bare cranium skinning through the trees and rocks.
But, as said before, you can fly in whatever attire you wish. It is your safety and your rosy pink ars.
Doc
="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List
s.matronics.com/">http://forums.matronics.com
p://www.matronics.com/contribution">http://www.matronics.com/contribution
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viperdoc(at)mindspring.co
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| Posted: Thu Jan 05, 2012 7:54 pm Post subject: Helmets -Why use one? |
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Hit one in the jet. One in the 52 and one in the 50. I've had my three!
Doc
Sent from my iPad
On Jan 5, 2012, at 4:33 PM, Bill Geipel <czech6(at)mesanetworks.net (czech6(at)mesanetworks.net)> wrote:
[quote]Beautiful.
Bill
On Jan 5, 2012, at 2:48 PM, "George Coy" <[url=mailto:george.coy(at)gmail.com]george.coy(at)gmail.com (george.coy(at)gmail.com)[/url]> wrote:
| Quote: | <![endif]--> <![endif]-->
Speaking of bird strikes, In my 17000+ hrs in small piston aircraft I only had one bird strike. Unfortunately, the bird was sitting in his nest in a tree at the time. Fortunately his tree helped slow things down so we met the ground, we did not even get a stiff neck out of it.
George
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[b]
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brian(at)lloyd.com
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| Posted: Thu Jan 05, 2012 10:40 pm Post subject: Helmets -Why use one? |
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On Thu, Jan 5, 2012 at 7:46 PM, Roger Kemp M.D. <viperdoc(at)mindspring.com (viperdoc(at)mindspring.com)> wrote:
| Quote: | Hit one in the jet. One in the 52 and one in the 50. I've had my three!
|
Only two for me but one came within inches of totaling the airplane ... and I didn't even know it had happened. It happened at night right at rotation and the noise and vibration at transition masked the sound of the impact. I didn't even know the aircraft was damaged until I got to my destination.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
[quote][b]
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czech6(at)mesanetworks.ne
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| Posted: Fri Jan 06, 2012 6:31 am Post subject: Helmets -Why use one? |
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Hit 50. All at once. Very. Short final, they all lift off the water at the end of the runway. Mechanics actually counted the strikes. Airbus didn't care. Looks bad when Captain shows up in a helmet.
Good friend took a duck thru the windshield of his airplane. Took out his left eye. It can happen.
Bill
On Jan 5, 2012, at 11:34 PM, Brian Lloyd <brian(at)lloyd.com (brian(at)lloyd.com)> wrote:
[quote]
On Thu, Jan 5, 2012 at 7:46 PM, Roger Kemp M.D. <viperdoc(at)mindspring.com (viperdoc(at)mindspring.com)> wrote:
| Quote: | Hit one in the jet. One in the 52 and one in the 50. I've had my three!
|
Only two for me but one came within inches of totaling the airplane ... and I didn't even know it had happened. It happened at night right at rotation and the noise and vibration at transition masked the sound of the impact. I didn't even know the aircraft was damaged until I got to my destination.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
[b]
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brian(at)lloyd.com
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| Posted: Fri Jan 06, 2012 9:41 am Post subject: Helmets -Why use one? |
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On Fri, Jan 6, 2012 at 6:24 AM, Bill Geipel <czech6(at)mesanetworks.net (czech6(at)mesanetworks.net)> wrote:
| Quote: | Hit 50. All at once. Very. Short final, they all lift off the water at the end of the runway. Mechanics actually counted the strikes. Airbus didn't care. Looks bad when Captain shows up in a helmet.
|
But you tried, right?
| Quote: | Good friend took a duck thru the windshield of his airplane. Took out his left eye. It can happen.
|
And engines quit running too. But we still fly single-engine aircraft, ride bicycles, walk down the street, and even get out of bed in the morning. It is all about risk acceptance and risk management. If you really wanna to be safe, stop flying them Ruski and Chink airplanes, and don't get into a car!
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
[quote][b]
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franc_mendes(at)hotmail.c
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| Posted: Fri Jan 06, 2012 11:04 am Post subject: Helmets -Why use one? |
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I hit about seven large birds in the landing flare while flying a caravan for the UN world food program in South Sudan in 1998. Startled me, but fortunately my speed was low. I had to do a 180 to backtrack the dirt strip and was greeted with the sight of a voracious pack of Sudanese swarming the strip to grab the dead birds.
Sent from my iPhone
On Jan 6, 2012, at 7:24 AM, Bill Geipel <czech6(at)mesanetworks.net (czech6(at)mesanetworks.net)> wrote:
[quote]Hit 50. All at once. Very. Short final, they all lift off the water at the end of the runway. Mechanics actually counted the strikes. Airbus didn't care. Looks bad when Captain shows up in a helmet.
Good friend took a duck thru the windshield of his airplane. Took out his left eye. It can happen.
Bill
On Jan 5, 2012, at 11:34 PM, Brian Lloyd <brian(at)lloyd.com (brian(at)lloyd.com)> wrote:
| Quote: |
On Thu, Jan 5, 2012 at 7:46 PM, Roger Kemp M.D. <viperdoc(at)mindspring.com (viperdoc(at)mindspring.com)> wrote:
| Quote: | Hit one in the jet. One in the 52 and one in the 50. I've had my three!
|
Only two for me but one came within inches of totaling the airplane ... and I didn't even know it had happened. It happened at night right at rotation and the noise and vibration at transition masked the sound of the impact. I didn't even know the aircraft was damaged until I got to my destination.
--
Brian Lloyd, WB6RQN/J79BPL
3191 Western Dr.
Cameron Park, CA 95682
brian(at)lloyd.com (brian(at)lloyd.com)
+1.767.617.1365 (Dominica)
+1.916.877.5067 (USA)
D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
ist"">http://www.matronics.com/Navigator?Yak-List
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ot;">http://www.matronics.com/contribution
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