Pictures

[Dr. Michael Seischab]

Hello Johan,

nice new page.
I tried several times to send you a picture of my ASW15 (D-2356) but i got the message back with the error message "Quota exceeded".
So i put it here...
Remark: my girlfriend is flying the D-2311 with the same winglets, the same new TE-Probe position.... (Comptetition sign "J")

keep on flying

Michael
 

[Johan van Ravenzwaaij]

H Michael,

Thanks for your picture; I will put it in the gallery asap.

Could you tell me when this "Quota exceeded" error happens? then I can take a look at it. Note: I restricted the size of images to 800x600 and 250 KB, because this site site isn't sponsored whatsoever and I have to pay for the webspace. If this is the problem, you could use your favorite image program and use the resize option. Or... you can contact me here  and I will get back to you by email; so you can send me some more pictures.

Johan

[van deun andre]

Hello,

I saw the picture of Michael's 15, and I wonder where he (and his
girlfriend) did find those magnificent winglets. Can anyone tell me
if there is a gain in L/D due to the winglets and where they can be
obtained ?
I had my 15 completely re-gelcoated this spring bij SZD in Poland.
They did a fantastic job, and my ship looks as brandnew.
Promis to sent some pictures in the near future.


André

[Dr. Michael Seischab]

Hello Andre,

The wingletdesign was developed by a friend as his diploma thesis at the DLR. Sadly he went to Australia...
Together with another friend, my girl and me built moulds and attached these winglets to the both ASW15 and one ASW19. They were certified as single piece changes.
Due to the fact that we have the moulds, we can build more winglets.
But with the installation of the new EASA authority, single piece changes are no longer possible. We are on a general certification, but it is a long way, where the manufacturer and a certified workshop have to be integrated. And they all have enough problems with the EASA certification, so that i don´t expect any progress in the next few years.

From a scientific view, the L/D is not significant changed in the first order approximation, because winglets increase the drag, while they increase the lift. But they improve the handling of elder gliders strongly, because elder gliders were developed for maximum perfomance with no respect to the handling (see ASW12 without airbrakes and so on).
So you just fly longer without getting tired....

Michael

[van deun andre]

Well Michael,


Thank's for your prompt answer.
I understand that I have to look further in my search foor winglets on my ASW 15B.
On the ASW 15 production list I found out that your ship is worknr.
15351 ,  while mine is 15355 with call-sign OO-YWA.
So they were made shortly after one another.

Greetings,

André

[Johan van Ravenzwaaij]

Mike's ASW15 pictures are now in the gallery: check it out!

[Dr. Michael Seischab]

Hi Andre,

there is one workshop in Germany who has a certification for ASW15 winglets (about 20cm).
It is the LTB Schönwald in Dinkelsbühl. You can try it there, but it is difficult. The homepage has been switched off, and some people say, he is bankrupt. A such modified ASW15 is just sold on www.segelflug.de (look under "Kleinanzeigen" Clubklasse)

greets

Michael

[van deun andre]

Michael,


Thank you for the information.
I saw the sold ASW 15 on the site of segelfug.de. I visit that site every
day, and there you can also find all the LTB's of Germany.
In the mean time I found out that there was a workshop in Germany,
FBW-Flugzeugbau in 91550 Dinkelsbühl who made winglets for
ASW 15 -  ASW19  - and Mistral C.
Can anyone inform me if that workshop is still existing ?

Yet many thanks

André

[Dr. Michael Seischab]

Hi,

you are talking about the same workshop . The LTB FBW ist identical with LTB Schönwald (its the name of the owner). The ASW15 for sale was made there...
But sadly i have no idea wether they are still working....

ciao

Michael

[van deun andre]

Hi Michael,


I could have known it was the same shop, for what a coincidence it would have been, if there where 2 shops in Dinkelsbühl that made
winglets for ASW.
I will continu my search, and in case of success I will share the
information on this site.

Greetings,

André

[Joshy]

Hi,

my Winglets are also from ernst Schönwald.
He closed his shop.
But he is checker for gliders.
And he has the forms for the Winglets.
The problem is: he is not certyfied anymore to manufacture them.
That means: has no license to fill out an JAA Form one.
You may ask for a solution:

fbw-flugzeugbau@t-online.de

or:

ERNST SCHÖNWALD:
09851-55820,
0172-8910986,
FAX 09851-55821

Best Regards,

Joshy