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22nd Dec 2019, 12:18
Replies: 88
Views: 36,292
Posted By DRDR

An electric motor has about 90% efficiency!

An electric motor has about 90% efficiency!
13th Apr 2019, 11:20
Replies: 146
Views: 80,948
Posted By DRDR

The idea is to get cheaper rates for flight...

The idea is to get cheaper rates for flight training. Nobody is talking about long range electric flight (yet).

Although someone is talking about electric VTOL supersonic flight already:
...
8th Aug 2018, 15:58
Replies: 304
Views: 145,869
Posted By DRDR

Sorry, I don't want to post photographs without...

Sorry, I don't want to post photographs without permission from the copyright holders. You can download the complete panorama by clicking the downwards arrow at the control panel at the bottom of the...
8th Aug 2018, 14:01
Replies: 304
Views: 145,869
Posted By DRDR

I have no idea. Like you I cannot find the...

I have no idea. Like you I cannot find the aircraft anywhere in the 360° (horizontal!) image taken at 16:50. So it must have been out of the rather wide view of the 22 megapixel panoramic camera...
8th Aug 2018, 11:30
Replies: 304
Views: 145,869
Posted By DRDR

I got the highest resolution possible, enhanced...

I got the highest resolution possible, enhanced the shadows and compared the images. My result: No Ju visible in the 16:50 photo and wreck visible in the 17:00 photo. Which more or less means that we...
Forum: Rotorheads
25th Aug 2013, 21:57
Replies: 122
Views: 63,540
Posted By DRDR

Some photos...

…you might enjoy:

A 500D from Germany:
http://farm1.staticflickr.com/251/444149920_ba6a16bc21_z.jpg
Flickr (http://www.flickr.com/photos/humuku/444149920/)...
Forum: Tech Log
22nd Feb 2013, 22:00
Replies: 2,056
Views: 1,272,074
Posted By DRDR

Thanks from me too for this great thread! ...

Thanks from me too for this great thread!

Does anyone remember a Concorde passing a manned balloon? I have seen footage of it and it did not look planned. You can find more details in an old...
Forum: Jet Blast
18th Mar 2011, 16:51
Replies: 74
Views: 22,817
Posted By DRDR

Angry German airport firefighters in munich have...

German airport firefighters in munich have detected activity on the hull of an ANA airplane coming from Tokio on wednesday (press release from the airport here...
19th Jul 2009, 20:37
Replies: 46
Views: 13,542
Posted By DRDR

Apparently VORs transmit with powers up to...

Apparently VORs transmit with powers up to Kilowatts. But as UHF is non ionizing radiation I would not think that it makes you infertile. Esspecially while sitting in a an aluminium tube which is...
Forum: Rotorheads
29th Dec 2008, 02:22
Replies: 5,672
Views: 4,203,178
Posted By DRDR

Hawaii Sightseeing

Just a few shots from a rotor centric tourist like me.
Although I know, that I cannot compete with the Augusta mantainance crew. ;-)

Btw.:

The helicopters land on a stretch of eruption...
Forum: Rotorheads
3rd Aug 2008, 13:16
Replies: 1,218
Views: 675,286
Posted By DRDR

No crash, just a little flight around Fox Galcier...

No crash, just a little flight around Fox Galcier New Zealand:

YouTube - Fox Glacier Heli Ride (http://www.youtube.com/watch?v=uFlCT0htnQU)
Forum: Rotorheads
30th Mar 2008, 10:35
Replies: 5,672
Views: 4,203,178
Posted By DRDR

Hawaii / Oahu - Fire and Rescue Training

Just took a snap while driving by a nice beach on the north eastern shore of the Hawaiian island of Oahu.
Apparently the Fire and Rescue guys where doing some training. Enjoy:
...
Forum: Jet Blast
17th Feb 2008, 19:08
Replies: 11
Views: 1,154
Posted By DRDR

ROFL Well, it really loks a little bit too...

ROFL

Well, it really loks a little bit too extreme. Maybe even expensive?
Forum: Jet Blast
16th Feb 2008, 18:17
Replies: 11
Views: 1,154
Posted By DRDR

A Really Bumpy LCY Landing

http://fr.youtube.com/watch?v=s5prz1Ae5QM&feature=related

Enjoy!
17th Sep 2007, 15:35
Replies: 356
Views: 102,252
Posted By DRDR

I never feeled at risk when flying them to some...

I never feeled at risk when flying them to some places in the middle of the Atlantic Ocean with no ILS, rain, low cloud cover and not much runway to speak of. But I am just a SLF. ...
Forum: Rotorheads
8th Sep 2007, 18:40
Replies: 1
Views: 1,632
Posted By DRDR

Robinson crashes on German highway

Apparently a Robinson helicopter crashed on a south western germany highway (A5, near Bühl, which is somehow south of Karlsruhe).

Unfortunately the two male occupants are dead. The flight...
Forum: Rotorheads
5th May 2007, 12:08
Replies: 5,672
Views: 4,203,178
Posted By DRDR

Ready for Takeoff: ...

Ready for Takeoff:

http://farm1.static.flickr.com/168/408216306_88ccf5420e.jpg
http://www.flickr.com/photos/humuku/408216306/

Sorry, couldn't resist! ;-)
Forum: Jet Blast
28th Apr 2007, 07:25
Replies: 97
Views: 32,999
Posted By DRDR

1) The photo with the cloud like phenomens is...

1) The photo with the cloud like phenomens is apparently faked.
Some curious person at another forum has found the original photo where the "UFO"s were superimposed upon:
...
8th Apr 2007, 09:27
Replies: 46
Views: 13,542
Posted By DRDR

Although it has nothing to do with cosmic...

Although it has nothing to do with cosmic radiation or ionizing radiation at all I undertook the effort to compare the power of various transmitters:

bluetooth: 0.001 W to 0.1 W
wireless LAN:...
Forum: Rotorheads
7th Apr 2007, 14:52
Replies: 5,672
Views: 4,203,178
Posted By DRDR

Nice motion blur!:ok:

Nice motion blur!:ok:
5th Apr 2007, 22:59
Replies: 46
Views: 13,542
Posted By DRDR

Microwaves are NOT ionizing radiation. And...

Microwaves are NOT ionizing radiation. And microwaves are reflected by metal (therefore metal dishes are used for focusing them). So if you are sitting behind the antenna you do not have to worry...
Forum: Rotorheads
2nd Apr 2007, 22:46
Replies: 5,672
Views: 4,203,178
Posted By DRDR

The last ones from me. I have not taken any...

The last ones from me. I have not taken any further helicopter picks. But if you want me to do so, I can give you my coordinates. ;-)
Remote controlled?...
Forum: Rotorheads
2nd Apr 2007, 09:08
Replies: 5,672
Views: 4,203,178
Posted By DRDR

Thank you for your very kind words! :-) The...

Thank you for your very kind words! :-)

The Robbie was parked in Te Anau on the New Zealand South Island (indeed the gateway to Milford Sound). It was shot shortly before sunset. So I do not...
Forum: Rotorheads
1st Apr 2007, 12:00
Replies: 5,672
Views: 4,203,178
Posted By DRDR

Some impressions from New Zealand from a non...

Some impressions from New Zealand from a non pilot...
http://farm1.static.flickr.com/194/441851579_75d220bcba_b.jpg
http://www.flickr.com/photos/humuku/441851579/...
1st Apr 2007, 10:54
Replies: 46
Views: 13,542
Posted By DRDR

Composition of cosmic radiation: 93 % protons ...

Composition of cosmic radiation:
93 % protons
6.4 % alpha-particles (He-ions)
0.6 % other ions like Li, B and Bi

Enegry of cosmic radiation:
100000000 eV to 100000000000000000000 eV

Due to...
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