Archive for September, 2008

>Podrel

>A funny idea came into my mind. There are couple of Petrel Amphibians in Finland. It looks like a plane of Donald Duck.

Here is one discussion thread in Finnish about it:
Nyt on suomen kolmas akuankkakone valmis

It has staggered wings (two wings, one on top of each other). What if it was completely different. Not exactly completely, but quite completely. Now on this latest Super Petrel, the engine pod is integrated to the upper wing. How if the upper wing was the only wing on the plane, the lower wing would not exist, the upper wing would be twice as long. The tail would not be angled upwards from the bottom of the fuselage, but it would be rather connected with two booms to the wing, in similar manner than it has been done on Adam A500. And finally, but not least, what if the fuselage was not a traditional fuselage, but a pod in the end of a strut, that fits the occupants, and nothing more. It would end before the prop arc. This would allow moving the propeller a bit downwards.

So the result:
– no aerodynamic penalty normally associated with the amphibian planes.
– center of thrust is at the same level as is the lift (high wing)
– because of the boom tail, the tail does not hit the water unless the plane flips.
– because you would not need to fit the tail to the fuselage, the fuselage-pod could be made a better boat shape

I could not resist, but name this idea as Podrel. Actually this is not a new idea entirely, it is partially borrowed from a NASA tech paper, but the application to amphibian use could be new twist for the configuration.

What do you think about this?

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Podrel

A funny idea came into my mind. There are couple of Petrel Amphibians in Finland. It looks like a plane of Donald Duck.

Here is one discussion thread in Finnish about it:
Nyt on suomen kolmas akuankkakone valmis

It has staggered wings (two wings, one on top of each other). What if it was completely different. Not exactly completely, but quite completely. Now on this latest Super Petrel, the engine pod is integrated to the upper wing. How if the upper wing was the only wing on the plane, the lower wing would not exist, the upper wing would be twice as long. The tail would not be angled upwards from the bottom of the fuselage, but it would be rather connected with two booms to the wing, in similar manner than it has been done on Adam A500. And finally, but not least, what if the fuselage was not a traditional fuselage, but a pod in the end of a strut, that fits the occupants, and nothing more. It would end before the prop arc. This would allow moving the propeller a bit downwards.

So the result:
– no aerodynamic penalty normally associated with the amphibian planes.
– center of thrust is at the same level as is the lift (high wing)
– because of the boom tail, the tail does not hit the water unless the plane flips.
– because you would not need to fit the tail to the fuselage, the fuselage-pod could be made a better boat shape

I could not resist, but name this idea as Podrel. Actually this is not a new idea entirely, it is partially borrowed from a NASA tech paper, but the application to amphibian use could be new twist for the configuration.

What do you think about this?

Dynaero MCR-01

I had a chance to see the Dynaero MCR-01 yesterday at Malmi airport. Here are some interesting pictures about it:

Front:

Dynaero smile:

Back:

Double slotted flaps:

Flap mechanism:

Canopy:

Interesting finding: the upper slot is rigid part of the flap. It does not move by itself, and the mechanism is as simple as on plain flap or the single slotted flap found on Cirrus or Diamond. When the flap is retracted, the slot hides under the wing. Very clever design.

Dynaero MCR-01

I had a chance to see the Dynaero MCR-01 yesterday at Malmi airport. Here are some interesting pictures about it:

Front:

Dynaero smile:

Back:

Double slotted flaps:

Flap mechanism:

Canopy:

Interesting finding: the upper slot is rigid part of the flap. It does not move by itself, and the mechanism is as simple as on plain flap or the single slotted flap found on Cirrus or Diamond. When the flap is retracted, the slot hides under the wing. Very clever design.

>Good NLF airfoil

>The SHM-1 airfoil seems quite interesting. It was designed for Honda Jet. There is a patent about it. I need to investigate that further it seems.

Good NLF airfoil

The SHM-1 airfoil seems quite interesting. It was designed for Honda Jet. There is a patent about it. I need to investigate that further it seems.

>Downloading all specific files from web server to your Linux desktop

>Everyone knows that there is the wget command in the Ubuntu. But by default its behavior is not very nice if you want to get for example backup of your home directory on the web server only. If you don’t have wget, you can install it by going to shell and typing:


sudo apt-get install wget

Example case: You have lots of pictures on your home page, in images folder. You want to get them all to your Linux desktop, ie. you want to make a backup. But you want only the images, not the other files that are in that folder, what do you do? Or what if you want to download all my music without needing to click download for provided links for each file separately?

I was asking around from the Linux gurus around me, but I could not get a simple answer other than read the man pages. Ok, I went and read the man pages. There were some examples, and they did not do what they promised to do until I combined them to the following:

This does to my music folder on our server a mirror to your hard disk, but it has adverse side effect, it keeps the web server directory stucture:


wget -r -l1 –no-parent -L -A.mp3 http://www.katix.org/karoliina/music/

I just wanted to have the mp3-files from one folder. So I searched further the man page.

Here is the line what did for me what I wanted:


wget -r -l1 –no-parent -L -A.mp3 -p –convert-links -nH -nd -P./ http://www.katix.org/karoliina/music/

It still downloads the robots.txt. But you can go and delete the unnecessary file. And if you want all my music, here is what you can do. In shell (terminal), go to your desired folder and then copy-paste this command line to the shell. And you’ll be done as quickly as the network allows.