Oops! I got icing on rotor

[Udi]

Still doesn't work When I save to my computer and run it from there I get the following message: "Windows Media Player cannot play the file. The Player does not support the format you are trying to play."

It also gave another message to the effect that file format is not consistent with the file extension

Udi

 

[Vance]

I believe that I have had birds, especialy turkey buzzards, want to play and more than a few times I have had to doge the birds. Most of these birds have more than a 3 foot wing span and they seem to like things that fly at their speed. Do you think that they want to mate? Or they just trying to be friendly? So far I have mised them.

I have hit a sea gull and an owl on my motorcycle, both times around 100 mph. It was quite violent and messy.

I saw on an NTSB report where a kite brought down a Robinson helicopter. The guy who was flying the kite took off before anyone could ask him about it.

Thank you, Vance

 

[automan1223]

Even More

Even More

The day I am writing about also had another thing happen to me, but I have never ever heard about since I have been flying my keyboard here and there since 99 or so.

At 500 ft agl I was attacked by a swarm of bugs. No I am not making this up. It was a very warm day, and the second run up I climbed to my target altitude at 700'. Then it was like I was getting shot with a bb gun. First 1 or 2 strikes then a whole bunch. I was really perturbed. I was like what the heck is at 500' ? This has to be only in the movies. There is nothing out here but me, or so I thought......

I smelled my first smoke at 450' and it got me concerned and then I saw the haze and it was from someones burn pile way down the other end of town. But you have to realize that its not just us gyros and other aircraft up there. Mother nature was there first.

Jonathan

 

[Harry_S.]

A little off topic.

Any of you remember a Tom Cahill? He wrote a monthly blurb in Mechanix Illustrated. He's been dead many years now. He had a dry wit.

One monthly question asked of Tom was; I was driving down the hi-way and a duck hit my windshield. I looked in the rearview mirror and saw the duck landing on the pavement. I felt bad and shook up. Does this happen very often?

Tom's succinct answer: Not to the same duck.


Cheers

 

[KenSandyEggo]

I got the source filter message too. Alex, I massaged my hard drive thoroughly after bringing it flowers and candy, but it still won't respond.

 

[twistair]

Ken,

What's the reason you keep such a obstinate person(al computer) at home? Well, I'll convert this video in mpeg this weekend but, Ken, stay macho - throw it (your wilful comp) out if it wants something more!
Seriously: ask sir Google to find something for words "codec" and "*.wmv". It will return some websites which have freeware for detecting which filter you need to read this file. One I know is called GSpot and may be found at gspot.headband.com
It checks your video or audio file and tells you which exactly filter you need. But there are many other sources to check and find exact codec.
BTW today I made some tasty inflight cockpit videos and will publish them this weekend as well. Hope to add some more tomorrow.

 

[Victor Duarte]

Hi alex, off topic, but mpeg can be viewed with mediaplayer after save it to disk.. if you have an error like "can't open media" , do an upgrade to WMP 10, for working a little with video : .avi codec divx (fast motion) is fine and worldwide, or .asf for streaming media, avoid realplayer
thanks

 

[automan1223]

windows updates

windows updates

Just reencode it to wma player 9 nothing higher, stop all this upgrade nonsense.

or mpeg 2. works even better.

Jonathan

 

[Victor Duarte]

john i agree for wm 9, enough, but not mpeg 2 , dvd format, you need a dvd or a decoder and an encoder to encode it, divx avi : correct, widespread.
if it was avi, everyone could read it.
IMHO

 

[automan1223]

wrong !

wrong !

Divixx is mpeg 4 and here in the usa is not a free encoder/decoder codec. you need to spend 50 bucks for it ! if not you get the spyware encoded one and I will never use real player because of the spyware embedded and it crashed my old system.

Maybe its free by you but it is not here yet.

It has good quality and small footprint but then any stock .avi file should play fine. go to the windows web site and down load the windows media encoder, its free and has a lot of settings and so far works well with most codecs.

Jonathan

 

[Ron Marlett]

I have seen this type icing many times on chilly foggy mornings while driving to work. It dosn't build up on the vehicle cause it isn't quite cold enough, but it does form extremly rapidly on the antennas. The lowering of the airpressure as the air flows around the antenna is just enough to push the surface below the freezing point. This ice forms Very quickly under the right conditions at highway speed. I could only imagine a aluminum rotorblade at a few hundred MPH. The ice buildup adds an asymetrical shape to the antennas and in a matter of minutes the antenna is waving at me(side to side in the airflow). When I used to live in eastern Wa. I recall On a few mornings, having to stop several times during my 30 mile drive to break the ice off the antennas(3/8" fiberglass CB antenna and 5/16" steel radio antenna). They would get to waving so bad I thought they would break or rip out of the fender. If I stopped and let them set for a few minutes, the ambient air temp, which is still above freezing, melted the ice all by itself.
I have never seen it that bad anywhere else, but I did notice it where I live now just the other morning as I had a little wave out of the steel antenna.

Ron

 

[Victor Duarte]

Divix is mpeg 4 and here in the usa is not a free encoder/decoder codec. you need to spend 50 bucks for it !

Damn, i didnt know.. yes, in fact, i use "premiere" so it's built in..
off topic again but microsoft realeased "windows media encoder" for free (it as at least) allowing to encode ASF files that are also pretty light.
cheers

 

[birdy]

Hmmmmm..................A Russan gets rotor ice and noone douts it.
But a while ago,an Ozzy said he got rotor ice and everybody said he was full of sh*t.
????????

 

[Aussie_Paul]

Birdy, I can't believe you waited so long about the icing!!!!!!!!!!!!!



Aussie Paul.

 

[twistair]

Damn, Birdy, I only told you that you experience should be more likely flutter caused by distortion of an airflow by rainfall drops than icing which is I believe impossible to catch at +25 C. Both these experiences seem to be very interesting and useful for all the gang.

 

[birdy]

That wasn't aimed at you Alex,you were one of the few who didn't dout.

BTW,wot dose this "flutter" thing feel like??

 

[mceagle]

I am one of those ones that didn't believe Birdy, neither do I believe this incident was ice. I am not calling you blokes liars, because I believe you really experienced what you thought was ice
I mentioned in Birdy's case that I had experienced exactly the same thing after taxiing through sticky mud. As the increased airflow dried the mud, it slowely detached itself and the blades became smooth again.

The incident in this thread could also have a simpler explaination. Flying through fog (or suspended water) would leave water streaming over the blades and as such would adversly affect the blade performance. It would also leave the drops of water witnessed on the blades later. You even get drops of water on the blades in foggy conditions without even flying.

The minus temps required to get ice on rotor blades would normally be so low that it would not be the conditions that gyronauts would fly in. Having said that there have been many that have flown in very sub zero conditions, without any problems. Another point worth mentioning would be the skin friction of a 400 mph rotor blade. Some smart blokes may be able to work that out - whether the heating effect of the skin friction is enough to overcome the chill effect of the air at airspeed. It is quite interesting to note that you can get burns on your feet while barefoot skiing.

This is my opinion only, and perhaps somebody else here will prove me wrong.

 

[birdy]

Yeh Tim,and I also said on the Oz forum it couldn't have been mud coz it started bout 20 mins after I last touched the ground.IF there was mud on the blades after TO,it would have been slung/washed off shortly after TO coz of the light rain,remember.

I'v fowen in -11c a couple of times Tim,would that be cold enough???

 

[twistair]

The minus temps required to get ice on rotor blades would normally be so low that it would not be the conditions that gyronauts would fly in.

Tim...
This is vulgar delusion which may become fatal once. Icing conditions depend not only on temperature but mostly on it's combination with relative humidity and dew point which at low altutudes is mostly met at near zero Celsius temps. Some years ago I've got ~5-7 mm of ice at Yak-52 wings in less than 2 minutes in foggy athmosphere at low altitude. OAT was -1 deg C.

I'm certainly not the best in explaining physics in English but it was done many times by pros.

Take a look for example: Kivi Aircraft Icing Handbook

 

[twistair]

Dave,

(OK, I recall "damn"
I have no exact picture of flutter at gyro rotor but from known examples in helos it should appear as sharp increasing of rotor shake. Our aerodynamists told that your recovery from this situation was likely caused by unloading rotor when you decided to land as soon as possible.