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HelicopterPhotos and Videos › Pics and small movie Helimeeting Netherlands
05-06-2005 02:14 PM  12 years agoPost 1
raptor30

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Tilburg,The Netherlands

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We had a Heli-meeting last sunday in Utrecht (the Netherlands) it was great weather,little bit windy and a lot of helicopter pilots
Here are some pics :
http://www.modelbouwforum.nl/test/p...pic.php?t=21436

http://www.modelbouwforum.nl/phpBB2...der=asc&start=0

http://82.156.18.207:900/helicopters/fotos/index.html

A small videoclip:
http://194.109.150.81/web/upload/vd...helimeeting.wmv

Marcel

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05-07-2005 09:25 AM  12 years agoPost 2
Ringding

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Austria

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Hi, very nice pics!

How come the blades seem to stand still like in american videos (because of NTSC, 30fps). This video runs at 25fps (at least that's what media player says). Was it filmed with an NTSC camera? The only other conclusion I could make of this is a headspeed of 1500 but it doesn't sound like that's the case...

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05-07-2005 03:59 PM  12 years agoPost 3
Juvaknin

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ISRAEL Jerusalem

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very nice!
next time we want to see more helis and less peoples

**Raptor 50SE, GY601, Futaba **

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05-08-2005 09:12 PM  12 years agoPost 4
raptor30

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Tilburg,The Netherlands

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I believe it was filmed with a small digital photocamera from Canon,the Ixus 30.

Marcel

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05-08-2005 11:24 PM  12 years agoPost 5
Dave P

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England,UK

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Hi
Ringding the effect you are seeing of the rotors stopped or going very slow is a combination of the rotor speed & the shutter speed on the camera strobing making the rotor appear to be going very slow or stationary.
If i set my camcorder to sports mode I get this effect, I have some video of a Lancaster bomber doing a flypast at an airshow & it looks like it has four engine failures as the props appeared stationary, everything souds normal but it does look odd not to see the props spinning.
.

Do a Hover - it avoids G

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05-08-2005 11:32 PM  12 years agoPost 6
Ringding

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Austria

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Thanks for the explanation, Dave. That's not what my question was about, however. I know why I see stationary blades. Think about it - you Americans have NTSC with 30 frames per second. At 900 rpm, there will be a blade at the same place every 1/30 sec. At 1800 rpm, there will be the same blade in the same spot every 1/30 sec. So, at 900 and 1800 rpm, the blades seem to stand still. For us mere Europeans who are stuck with PAL and 25 fps, these special rotor speeds are at 750 and 1500 rpm. So I wondered if he was flying at 1500 rpm in the video. But it doesn't sound like 1500 rpm.

EDIT: So you are not American. Then it's them Americans I'm talking about. As is the case, most of the vids we see are from over there still.

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05-09-2005 08:33 PM  12 years agoPost 7
555 flyer

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Netherlands

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Only the helicopters with real power are able to turn those blades at a decent speed . The footage of my MP gives a different view than the (c)Raptor later on.

Rick

P.S.: Marcel nu weten we ook waarom de plaatjes-server er elke keer uit knalde.

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