Walraven aircraft and projects (Netherlands)

javierarg · 27 September 2011

WALRAVEN W.4
In the jane's a pre-World War II (1938) there are pictures of this plane. Manufactured in the Netherlands Indies (Indonesia).
there is very little information, and could not find three views of this plane.
His identification is Walraven 4.
No websites in Indonesia with aircraft data, only a civil registry of the aircraft:
ID - number built - date discharged.

PK-SAI -

Walraven W.4

-2

PK-SAI(2)

-

00.00.39

Written off 11.12.39

hesham · 27 September 2011

Hi,

Walraven also designed W.1,WG.1 and W.5 light aircraft powered
by single engined,and W.2 & W.3 powered by twin engined.

For W.4,it was two-seat trainer as I know,but it was not a project,
so it doesn't belong to this section.

Jos Heyman · 27 September 2011

The Walraven W4 was a two seater which flew for the first time on 14 April 1938. Two were built for the Vliegclub Bandoeng with registrations PK-SAI and PK-SAU. The former aircraft was written off on 11 December 1939 whilst the second aircraft remained in use until 1941.
Specifications:
span: 10.67 m
length: 7.05 m
engines: 1 Walter 65 hp
max. speed: 170 km/h

Other Walraven aircraft were:
Designed by M. V. De Pattist and L.W. Walraven and built in Bandoeng, the Walraven PW1 flew for the first time in September 1933, although 23 November 1933 has also been mentioned. It was registered as PK-SAM on 4 May 1934 and crashed in Bandoeng in 1935.

The Walraven W2 was built in 1934 specifically for Khouw Khe Hein, a businessman who wanted to establish an aircraft industry in the NEI. Its first flight was on 4 January 1935 and on 28 January 1935 the aircraft was registered as PK-KKH. It made demonstration flights to The Netherlands (from 16 to 27 September 1935 and 1 to 12 November 1935 for the return journey) and China (in 1937) but the venture lapsed when Khow Khe Hein was killed in an aircraft crash with a military 139 bomber in February 1938. The aircraft was subsequently stored by the ML-KNIL at Andir where it was destroyed during the Japanese attack of 19 February 1942.

The Walraven W3 was a proposed twin engined air taxi which was not built.L. W. Walraven, the designer ended up in a Japanese camp where he designed a W5 aircraft. He died on 6 November 1942.

Apophenia · 27 September 2011

The Walraven W.3 air taxi project was based on the W.2 airframe. The W.3 was for KLM.

BTW: Most references list the Pattist-Walraven PW-1 as a light biplane. If so, what is this BAC Drone-style monoplane with Pobjoy pusher from Flight, 14 June 1934 (pg 592)?
http://www.flightglobal.com/pdfarchive/view/1934/1934%20-%200592.html

Jos Heyman · 28 September 2011

The picture you show is definitely the PW-1.
I have enclosed another picture of it as well as a (poor) picture of the W-3. Both copied from Casius, G.J. & Postma, T., 40 jaar Luchtvaart in Indie (1986).

javierarg · 28 September 2011

Mr. Hesham you're right. But I think it's an interesting topic, I would like to know where should be published. Thank you.
On the other hand, Jos, you will have views of the w4?
Thanks!

lark · 28 September 2011

Waalraven's last design was the W-5 , a twinboom pusher.
The W-5 was never realized.

He made the drawings for this aircraft in a prison camp in Burma
during WW II.

source:Zeldzame Vliegtuigfoto's-part 2 Hugo Hooftman.La Riviere&Voorhoeve.The Netherlands.1968.

Apophenia · 28 September 2011

Jos: thanks for the confirmation (Walraven didn't seem like a biplane guy).

So, the W-3 was indeed an enlarged W-2 (presumably a 4-seater?). Any indication of the powerplant planned? Obviously not Pobjoy Niagaras, perhaps Walter Minors?

hesham · 28 September 2011

lark said:
Waalraven's last design was the W-5 , a twinboom pusher.
The W-5 was never realized.

That is aircraft,we must ask my dear Tophe about it ?.

Tophe · 28 September 2011

Yes, the W.5 is featured (box-view) on my twin-boom site http://cmeunier.chez-alice.fr/update_FG.htm
I noted it was designed in a Japanese prisonner camp by a Dutch designer (1941-45?)
I may have the source 3-view somewhere, I may check.

Tophe · 28 September 2011

W.5 from "Zeldzame vliegtuig foto's" (via Lark if I remember correctly):

Jos Heyman · 29 September 2011

Sorry, I have no specification data for the W-3.

hesham · 29 September 2011

Excellent my dear Tophe,

thank you very much.

Jos Heyman · 29 September 2011

I have since obtained a much larger scan of the Walraven W-5 design. On this it is distinguishable that the length was 6.60 m. This allowed me to estimate the wing span as 11.05m. No indication as for the engine and I doubt if Walraven even though about this. My guess is that he designed this to maintain his sanity, rather than with the idea that it would be built as Walraven died in the camp on 6 November 1942. How Hugo Hooftman came to get hold of this drawing would be another very interesting story. Since Hugo Hooftman has gone to that Aviation Historian Academy in the sky quite some years ago, we will probably never know.

lark · 1 October 2011

Jos,

Is your drawing the same as the one obtained by H.Hooftman ?

Jos Heyman · 1 October 2011

Yes - sorry, I should have mentioned that.

Maveric · 8 November 2011

Walraven W.5 in better quality.

Maveric · 8 November 2011

some w.4 pics

Maveric · 8 November 2011

Walraven W.2

Maveric · 8 November 2011

Walraven PW.1

javierarg · 14 November 2011

Thanks for these photos of W4,!!!!
Maveric, please, you have the three views of Walraven 4?
Is difficult for me, I have not found yet

Maveric · 14 November 2011

Sorry, no 3views :'(

Hawker Nut · 15 November 2011

The last issue of the French magazine "Le Fana de l'Aviation" includes an article on the Walraven aircraft. I haven't seen it yet, but will post a short review once I get my copy.

javierarg · 1 December 2011

Hi, Hawker !
Were you able to get the number 504 of the magazine? here (South America) is very difficult ...

Jos Heyman · 1 December 2011

Can somebody scan that article, please and either post it here or send it to me. French journals are impossible to get in Australia.
Thanks.

Jos Heyman · 2 December 2011

Thanks everybody for your help.

Jan den Das · 25 March 2013

During the thirties there was in the Dutch East Indies someone designing and building some, very nice civil aeroplanes.
This was L.W. Walraven.
One of his designs was a 4 seat twin engined airtaxi. This projects was never build.There is only a small drawing which shows the aeroplane with two tractor screws.
This design was from 1935.
Now I found in an article that there has been an other design of this aeroplane with pusher engines, this should have been mentioned in the aeroplane during those days.

Who can help me with this publication from the Aeroplane?

Thanks

hesham · 25 March 2013

Hi Jan,

where that second design,can you send it,and for the pusher engines one,it was
PW-1 and not W-3.

Arjen · 25 March 2013

Jan is asking for the issue of The Aeroplane that describes a (twin engine?) pusher design by Walraven.

The PW-1 is a pusher design, but not the one Jan is inquiring about:

Jan den Das said:
One of his designs was a 4 seat twin engined airtaxi. This projects was never build.There is only a small drawing which shows the aeroplane with two tractor screws. [I'm guessing this refers to the W-3 as shown by Jos Heyman]
This design was from 1935.
Now I found in an article that there has been an other design of this aeroplane with pusher engines, this should have been mentioned in the aeroplane during those days.

Jos Heyman said:
The picture you show is definitely the PW-1.
I have enclosed another picture of it as well as a (poor) picture of the W-3. Both copied from Casius, G.J. & Postma, T., 40 jaar Luchtvaart in Indie (1986).

Walraven PW-1 PK-SAM

Walraven W-3

In short: L.W. Walraven reportedly produced an alternative W-3 design for a pusher aircraft, described in a contemporary issue of The Aeroplane. Now, somebody please find the issue - and make us all happy

Jan den Das · 25 March 2013

Hi Hesham

No there should has be an twin engined pusher projects W-3 which should have been mentioned in The Aeroplane, thats why I am looking for someone who has these old magazines or know ere to find them
Yes you are right the PW-1 was a pusher, but the W-5 as well.
Here you find the drawing and picture of the modell
Jan

Arjen · 25 March 2013

Best W-3 drawing I've ever seen. Model image is nice too. Thanks, Jan.

hesham · 25 March 2013

OK Jan,

I will check about it,and thank you my dear Arjen.

Jos Heyman · 25 March 2013

To complete the story, here is a drawing of the Walraven W-5. It is from Hugo Hooftman's Zeldzame Vliegtuig fotos part 2, a 1968 book.
Walraven designed it whilst he was in a Japanese camp where he died on 6 November 1942.

Apophenia · 25 March 2013

Perhaps we should have a merged 'Walraven Projects' page?

http://www.secretprojects.co.uk/forum/index.php/topic,13787.msg138005.html

Stargazer · 25 March 2013

Apophenia said:
Perhaps we should have a merged 'Walraven Projects' page?

Topics merged.

Jan den Das · 26 March 2013

In June 1965 Hugo Hooftman published in his magazine Cockpit an article concerning L.W. Walraven.
This gives all the answers, or almost all, I have seen be questioned by you.
Enclosed the complete article and extra an drawing and deatils of W-4 and a better side view of the PW-1

Jan

Ps. Sorry its in Dutch and dont ask me to translate.

part I

Jan den Das · 26 March 2013

Part II

Jan den Das · 26 March 2013

Part III

Jan den Das · 26 March 2013

Part IV

Jan den Das · 26 March 2013

Part V

Walraven aircraft and projects (Netherlands)

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