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Search: Posts Made By: ramen noodles
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Forum: Rotorheads
2nd Feb 2011, 20:32
Replies: 32
Views: 6,643
Posted By ramen noodles

Can I rephrase rotorwash's logic: If the...

Can I rephrase rotorwash's logic:

If the manufacturer has designed rotor parts that are too weak, he can cover that up by designing servos that are also too weak. That way no rotor parts break,...
Forum: Rotorheads
12th Sep 2009, 17:27
Replies: 6
Views: 1,955
Posted By ramen noodles

The impact absorption of a modern helicopter is...

The impact absorption of a modern helicopter is several times that of the McClaren that you highlight. Any helo designed to the latest standard (B429, AW139 and S92 come immediately to mind) can...
Forum: Rotorheads
29th Aug 2009, 15:16
Replies: 52
Views: 5,442
Posted By ramen noodles

Poor SASless is alone, let me help out. Is...

Poor SASless is alone, let me help out. Is European helicopter flying safer than in the US? No, statistically, the US accident rate and fatal accident rate per hour is actually a tad lower,...
Forum: Rotorheads
22nd Aug 2009, 11:26
Replies: 16
Views: 2,753
Posted By ramen noodles

No mystery on those TR blades. The bottom shot...

No mystery on those TR blades. The bottom shot shows the blades aligned with the tail boom (they are on the opposite side of the fuselage). Note the MR blades are in a different position than in...
Forum: Rotorheads
2nd Aug 2009, 19:04
Replies: 392
Views: 58,948
Posted By ramen noodles

RVDT, This is getting to be a fun thread. Let...

RVDT,
This is getting to be a fun thread. Let me weigh in a bit:
The theory that a wind against a slope would produce such a smooth flow that it would look like a steady descent is just that -...
Forum: Rotorheads
25th Jul 2009, 13:31
Replies: 5
Views: 5,484
Posted By ramen noodles

Roll out: February 2010

Roll out: February 2010

"Paper helicopters fly very well, indeed." I read that here on pprune years ago. Still true, I would wage.
Forum: Rotorheads
16th Jul 2009, 11:32
Replies: 925
Views: 272,763
Posted By ramen noodles

You guys are a bit off base. The rigid pusher...

You guys are a bit off base. The rigid pusher does not simply deliver a thrust, it responds to flow changes with surprising changes in its thrust and moment. If the nose goes up, the prop will see...
Forum: Rotorheads
27th Jun 2009, 14:56
Replies: 55
Views: 12,327
Posted By ramen noodles

Dave, Sirohi, the principal inventor, is not...

Dave,

Sirohi, the principal inventor, is not a lawyer, he is a distinguished engineering expert on electrical actuation, and part of the University of Maryland faculty that researches in...
Forum: Rotorheads
26th Jun 2009, 04:33
Replies: 1,701
Views: 358,456
Posted By ramen noodles

Some Common Sense Here, Gemtlemen?

As I understand the points being made, the V-22 ended its Iraq tour with a final MC rate of 62% (the first several months were reported at 68% as I recall). I also remember that the USMC kept the...
Forum: Rotorheads
18th Jun 2009, 20:39
Replies: 1,998
Views: 558,907
Posted By ramen noodles

max, since such mathematics seems to interest...

max,
since such mathematics seems to interest you, shouldn't the Part 29 certificate of the Super Puma series be revoked, considering the several main rotor blade failures have occurred, even though...
Forum: Rotorheads
6th Jun 2009, 20:22
Replies: 1,701
Views: 358,456
Posted By ramen noodles

I guess you cant figure it out, but I can. A V22...

I guess you cant figure it out, but I can. A V22 gets very very low on gas, and lands off site. They refuel it, and when they start, it causes a grass fire that scorches the bird.

Sounds like a...
Forum: Rotorheads
6th Jun 2009, 18:11
Replies: 1,701
Views: 358,456
Posted By ramen noodles

If there was a headline every time a regular...

If there was a headline every time a regular helicopter landed somewhere in a very-low-on-fuel state, the newspapers and TV would have no room for the ads that keep them in business.

And if you...
Forum: Rotorheads
30th May 2009, 20:16
Replies: 1,998
Views: 558,907
Posted By ramen noodles

widgeon and max, You are right, I was snarpy. ...

widgeon and max,
You are right, I was snarpy. Sorry, truly. I am also impressed with your background, and believe you are probably an expert on FMEA's and such, the exact topic of this thread.
...
Forum: Rotorheads
30th May 2009, 15:14
Replies: 53
Views: 8,898
Posted By ramen noodles

topend, there is one helicopter that obeys that...

topend,
there is one helicopter that obeys that rule. It is in every basic training manual, but not elsewhere!
Forum: Rotorheads
29th May 2009, 05:40
Replies: 7
Views: 1,743
Posted By ramen noodles

roundabout ground route vs air miles?

roundabout ground route vs air miles?
Forum: Rotorheads
28th May 2009, 12:57
Replies: 1,998
Views: 558,907
Posted By ramen noodles

crab, you are certainly right in the very general...

crab, you are certainly right in the very general case, but that is such a broad statement in this case it is worthless in this specific case. An oil operator carrying passengers to a rig cannot...
Forum: Rotorheads
28th May 2009, 04:26
Replies: 1,998
Views: 558,907
Posted By ramen noodles

max, Your religious belief in HUMS as...

max,
Your religious belief in HUMS as omniscient and all-knowing is comforting, but totally misplaced. So too is your belief that "the way it is operated" somehow makes studs break or not.
...
Forum: Rotorheads
27th May 2009, 04:30
Replies: 58
Views: 14,633
Posted By ramen noodles

I was due to take an instrument checkride on one...

I was due to take an instrument checkride on one of those bumpy Alabama afternoons where the CB's pop and there are lots of thermals to keep your cross check from slowing down.

In spite of the...
Forum: Rotorheads
25th May 2009, 17:39
Replies: 53
Views: 8,898
Posted By ramen noodles

The math is very simple. If you divide forward...

The math is very simple. If you divide forward speed (distance/time) by vertical speed (height/time) you end up with Distance per unit height.
Take airspeed in Knots (nm/hr), divide by 60 and you...
Forum: Rotorheads
25th May 2009, 16:38
Replies: 28
Views: 10,362
Posted By ramen noodles

Actually, the flapping is limited by the...

Actually, the flapping is limited by the mechanical stops. The delta hinge allows the blade to flap and relieve itself of the excess thrust while the tail rotor is in high speed edgewise flight. In...
Forum: Rotorheads
25th May 2009, 03:19
Replies: 28
Views: 10,362
Posted By ramen noodles

EN48 asked, " It has been my understanding that...

EN48 asked, " It has been my understanding that the Delta hinge is used also to reduce flapping amplitude so that the TR can be placed closer to the tailboom without striking the tailboom. Do I...
Forum: Rotorheads
24th May 2009, 18:42
Replies: 28
Views: 10,362
Posted By ramen noodles

A "delta hinge" is a description of the way the...

A "delta hinge" is a description of the way the blade is made to reduce angle of attack when it flaps. It is easy to do, just have the pitch change rod apply less pitch as the blade flaps up...
Forum: Rotorheads
18th May 2009, 03:23
Replies: 53
Views: 8,898
Posted By ramen noodles

rokija...

rokija (http://www.pprune.org/members/202042-rokija)

The way to explain it is to use a plot of rate of descent (y axis) vs airspeed (x axis). You can simply get a few points each time you fly by...
Forum: Rotorheads
17th May 2009, 06:32
Replies: 53
Views: 8,898
Posted By ramen noodles

As a general rule, the best glide angle in auto...

As a general rule, the best glide angle in auto is done at a speed about mid point between the best rate of climb and the best range speed. If you have a headwind, add about 1/2 to 2/3 of the wind...
Forum: Rotorheads
13th May 2009, 23:23
Replies: 15
Views: 2,007
Posted By ramen noodles

The FAA is very strict about the newness of the...

The FAA is very strict about the newness of the aircraft, and won't allow old parts anywhere near a new machine. When new aircraft are very lightly equipped, it is sometimes a problem to get the...
Showing results 1 to 25 of 81
 


 
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