CHP Helo Rescue - You spin me right round...

[Eclipse]

In the video in this post, you can see the rescue guy spinning.
http://captalk.net/index.php?topic=20864.msg384087#msg384087

I was wondering what causes that?  Purely the wind?  Counter-rotational force?

If the wind, is it propwash, or wind coming up the hill?

[SarDragon]

By the time I got to the other post, there was no video. As for spinning on a hoist in general, it's mostly random. In the rides I've had under the same helo, the rotation had no specific pattern. My rides were mostly over level ground, and result from uneven airflow. Sometimes you can stick out a limb or two and slow, or stop, the rotation; sometimes not. E-ticket ride for sure.

[stillamarine]

Makes me miss SPIE rigging.


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[NIN]

Makes me miss SPIE rigging.

Did it once on my monkey harness accidentally. Pass.

[A.Member]

Makes me miss SPIE rigging.

Did it once on my monkey harness accidentally. Pass.

LOL.  I bet!

[Flying Pig]

SPIE rigging is way cooler than being hoisted.  In the civilian world SPIE rigging is referred to as HEC "Human External Cargo".  I used to do a decent amount of it flying an MD500. Its a totally different feeling of responsibility when you look down as the pilot and see two of your buddies flying 100' below you on a rope! Its even "weirder" in a Huey because as the pilot, you cant see your load.  You rely on the Crew Chief in the back to direct you. 

[NIN]

SPIE rigging is way cooler than being hoisted.  In the civilian world SPIE rigging is referred to as HEC "Human External Cargo".  I used to do a decent amount of it flying an MD500. Its a totally different feeling of responsibility when you look down as the pilot and see two of your buddies flying 100' below you on a rope! Its even "weirder" in a Huey because as the pilot, you cant see your load.  You rely on the Crew Chief in the back to direct you.

The hoist on the C-model Chinook went thru the hellhole (the hook-hole in the center of the floor).  We had a pulley setup with a cable cutter that we could rig and hoist up and down (my scant remembery says 3,000 lb limit for the hoist, but I think that's wrong. I know the load limit on the ramp was 3,000 lbs).  The hoist system was also the internal winch system for cargo.

We were told in no uncertain terms "We will never put people on the hoist. Ever."   I never did a live lift with the hoist, but we had to train with it for other purposes, so much like slingloads, you were calling the hook for the pilots because the hoist/hook location is 20-ish feet behind them.  If you were good at making slingload calls, you had a fighting chance with the hoist.  If you were marginal at slingloads, forget it: the hoist was out of your league by an order of magnitude.

Now the Special ops birds all have door hoists.  Much different ballgame. The pilot can look out his window and see the hoistee pretty easily.

[stillamarine]

SPIE rigging is way cooler than being hoisted.  In the civilian world SPIE rigging is referred to as HEC "Human External Cargo".  I used to do a decent amount of it flying an MD500. Its a totally different feeling of responsibility when you look down as the pilot and see two of your buddies flying 100' below you on a rope! Its even "weirder" in a Huey because as the pilot, you cant see your load.  You rely on the Crew Chief in the back to direct you.

The hoist on the C-model Chinook went thru the hellhole (the hook-hole in the center of the floor).  We had a pulley setup with a cable cutter that we could rig and hoist up and down (my scant remembery says 3,000 lb limit for the hoist, but I think that's wrong. I know the load limit on the ramp was 3,000 lbs).  The hoist system was also the internal winch system for cargo.

We were told in no uncertain terms "We will never put people on the hoist. Ever."   I never did a live lift with the hoist, but we had to train with it for other purposes, so much like slingloads, you were calling the hook for the pilots because the hoist/hook location is 20-ish feet behind them.  If you were good at making slingload calls, you had a fighting chance with the hoist.  If you were marginal at slingloads, forget it: the hoist was out of your league by an order of magnitude.

Now the Special ops birds all have door hoists.  Much different ballgame. The pilot can look out his window and see the hoistee pretty easily.

CH-47 = 26,000 pounds externally
CH-46 = 10,000 pounds externally
CH-53E = 36,000 pounds externally

That's from memory......

My job on active duty was a Landing Support Specialist. I made my bread and butter standing underneath helicopters hooking up external loads and rigging cargo. I've shaken the hand of a Phrog crew chief through the hell hole. I've had gas dumped on me by pilots......which by the was ticks me off and I cancelled entire training revolutions because of it. I conducted the very first external lift with the V-22 while it was in testing at Pax River in 1999 (the aircraft dropped the load in the river). I have picked up damaged aircraft. I received the full 200,000 volts of static electricity from a 53E. I was twitching for days.

[NIN]

CH-47 = 26,000 pounds externally
CH-46 = 10,000 pounds externally
CH-53E = 36,000 pounds externally

That's from memory......

Thats the cargo hook on each (CH-47C was 20,000 externally, single point. CH-47D and later had triple-tandem hooks allowing for more options, including 26,000 max on the center hook alone)

The hoist was a little different owing to the fact that used the winch and winch cable, you had to remove the hook (entirely) to use it thru the utility door, and a series of pulley assemblies had to be added to get the cable from the winch to the utility door.  After tracking down the book, the hoist limitation was 600lbs,  I believe solely due to the cabin interior structure limits. (so I was correct: ramp 3,000 lbs limit, hoist something else)

My job on active duty was a Landing Support Specialist. I made my bread and butter standing underneath helicopters hooking up external loads and rigging cargo. I've shaken the hand of a Phrog crew chief through the hell hole. I've had gas dumped on me by pilots......which by the was ticks me off and I cancelled entire training revolutions because of it. I conducted the very first external lift with the V-22 while it was in testing at Pax River in 1999 (the aircraft dropped the load in the river). I have picked up damaged aircraft. I received the full 200,000 volts of static electricity from a 53E. I was twitching for days.

"Hello, Mr. Static Discharge..."  Yup.  Been there, slung that. Shotgun HMMWVs, pack howitzers, CONNEX containers, UH-60s, supplies, gateguards, 2 1/2 ton trucks, 10,000 lbs of gravel, etc.   

Dangling under the aircraft on one's monkey harness and wondering if you can run fast enough if the pinnacle landing turns into a go-around late in the approach is not funny...