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Old 02-18-2011, 03:28 PM   #4741
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The first guy in the BO-105 is Siegfried Hoffmann, he was killed doing this kind of flying, there is a video of his fatal crash. You can google him.

Who the hell is this guy?
Looks like he should be on a 007 movie.


How did this happen?

[/QUOTE]
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Old 02-18-2011, 06:05 PM   #4742
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Originally Posted by Ridemuch View Post
Not sure if this has been on here before but.
Who the hell is this guy?
Looks like he should be on a 007 movie.
You've never seen US Army Scout Pilots working an area or a hot insertion of an SF team have you?

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Old 02-19-2011, 05:38 AM   #4743
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Originally Posted by spntshell View Post
The first guy in the BO-105 is Siegfried Hoffmann, he was killed doing this kind of flying, there is a video of his fatal crash. You can google him.
yep, flew it straight into the deck. play with fire, get burned i guess
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Old 02-20-2011, 12:47 PM   #4744
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Originally Posted by spntshell View Post
The first guy in the BO-105 is Siegfried Hoffmann, he was killed doing this kind of flying, there is a video of his fatal crash. You can google him.
[/QUOTE]

I've only flown the 117 once, but isn't there something to do with the solid head and slow flight and right (or left, I forget) turns where it quits goin in the direction you want it to? Gotta be some 105 guys here.

I used to love his low level acro routine too!
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Old 02-20-2011, 01:30 PM   #4745
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I've only flown the 117 once, but isn't there something to do with the solid head and slow flight and right (or left, I forget) turns where it quits goin in the direction you want it to? Gotta be some 105 guys here.

I used to love his low level acro routine too![/QUOTE]


Slow and low turns to the right are not a good idea in the 105.
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Old 02-20-2011, 03:38 PM   #4746
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yep, flew it straight into the deck. play with fire, get burned i guess

Yep and the creepy part was the sound of that 250-C20 spooling down
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Old 02-20-2011, 03:52 PM   #4747
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Originally Posted by Weirdo


Slow and low turns to the right are not a good idea in the 105.

I've heard from a guy in the transmission shop that prolonged hard right turns are bad for the transmissions in the 117.

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Old 02-20-2011, 03:58 PM   #4748
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I never experienced any problems with the BK controllability wise. Don't know about the transmission issue but I was flying EMS not acrobatics.

I have had jack stall in an A-star though.

There was a dutch roll issue on the MD 900 I believe. Think that there is some weird wiggles on approach. Company I flew for had one at another hospital and one of the pilots was telling me it does some strange stuff that he couldn't figure out. Has those computer controlled stabilizers on it.
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Old 02-20-2011, 05:44 PM   #4749
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Originally Posted by Elvis70 View Post
I never experienced any problems with the BK controllability wise. Don't know about the transmission issue but I was flying EMS not acrobatics.

I have had jack stall in an A-star though.

There was a dutch roll issue on the MD 900 I believe. Think that there is some weird wiggles on approach. Company I flew for had one at another hospital and one of the pilots was telling me it does some strange stuff that he couldn't figure out. Has those computer controlled stabilizers on it.
Astar B models were bad for jack stall, especially at altitude. I hated those blue blades....I guess I still do.

Anyway. I don't like bringing this thread down, but I've been warned about hard right turns in the 105 and trust those who tell me to be careful, so I am.

And here's why.



Seems like it gets to a point and it doesn't want to come back. That being said, I have no real knowledge of what caused this crash, just what others have told me. The whole thing is pretty sad.
I've never heard about hard sustained turns being hard on the tranny. If the MMI isn't showing any mast flex then then there should be no effect as far as I can see.

Weirdo screwed with this post 02-20-2011 at 05:58 PM
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Old 02-20-2011, 06:13 PM   #4750
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Quote:
Originally Posted by Elvis70 View Post
I never experienced any problems with the BK controllability wise. Don't know about the transmission issue but I was flying EMS not acrobatics.

I have had jack stall in an A-star though.

There was a dutch roll issue on the MD 900 I believe. Think that there is some weird wiggles on approach. Company I flew for had one at another hospital and one of the pilots was telling me it does some strange stuff that he couldn't figure out. Has those computer controlled stabilizers on it.
Ok as newbie I have to ask - whats a jack stall?

I'm finally going for my second lesson in a R-22 this week. I have been warned that I'm about to get drowned in paperwork.
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Old 02-20-2011, 06:24 PM   #4751
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Ok as newbie I have to ask - whats a jack stall?

I'm finally going for my second lesson in a R-22 this week. I have been warned that I'm about to get drowned in paperwork.
Like drinking out of a fire hose....

Jack stall is actually "hydraulic servo transparency" It's when the forces placed on the servos are more than they can cope with and the forces from the rotor system are fed back through the flight controls.

That'll be five bucks.
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Old 02-20-2011, 07:00 PM   #4752
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Originally Posted by Weirdo View Post
Like drinking out of a fire hose....

Jack stall is actually "hydraulic servo transparency" It's when the forces placed on the servos are more than they can cope with and the forces from the rotor system are fed back through the flight controls.

That'll be five bucks.
Wow! Ok, follow up question - what do you do about it?

I'm good for the five bucks.... or a sampling of the finest Australian ales...
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Old 02-20-2011, 07:07 PM   #4753
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What he said, and I will add that I have heard that this is intentional in the A-star to protect the star flex head system from excessive forces being applied by the pilot. I had it in a B-2 and wasn't flying very aggressively. This seemed to be caused by low pressure in one accumulator. Never got it once it was charged and the stick no longer kicked to one side hard and then back center when the pressure first built at start up.

For sure a shame the way he died in that BO. Happened quick.

Quote:
Originally Posted by Weirdo View Post
Like drinking out of a fire hose....

Jack stall is actually "hydraulic servo transparency" It's when the forces placed on the servos are more than they can cope with and the forces from the rotor system are fed back through the flight controls.

That'll be five bucks.
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Old 02-20-2011, 07:08 PM   #4754
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Ease up pressure on the stick, it will go away quickly. Your pucker may take longer to fade.

Quote:
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Wow! Ok, follow up question - what do you do about it?

I'm good for the five bucks.... or a sampling of the finest Australian ales...
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Old 02-20-2011, 08:06 PM   #4755
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I've never heard about hard sustained turns being hard on the tranny. If the MMI isn't showing any mast flex then then there should be no effect as far as I can see.
Something about oil starvation to a specific section of the box causing premature wear.

Repeated over time could cause a failure.
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