Adaridi it is, and not in the Finnish Air Force Museum, but in the Finnish Aviation Museum at Helsinki-Vantaa airport. Adaridi was named after its designer, was a very light aeroplane, did a few flights and was stored. One of those early experimental designs that were not really good for any practical purpose.

I find Snapper’s comment on the “highest suicide rate in the world” out of place and certainly way off-topic in an aviation history forum. Certainly something for the moderators, if there are any.
Besides, talking about highest rates, the Brewster 239, in Finnish AF service, achieved the highest kill to loss ratio in WWII, and that is a fact.

Edit: Just to think what we could have done with Spitfires. We did have a few Hurricanes, but they were considered crap.

Grendel, I agree with you that the good people of Pensacola certainly take good care of BW-372. But what makes you think it wouldn’t be taken equally good care of in Finland?
AFAIK, US Navy prohibits any wrecks of their old aeroplanes to be surfaced, and thus restored, on the grounds that they are still legal property of USN.
If finally Finnish officials have woken up and realised that a piece of Finnish AF property lies in Pensacola, and want it back to Finland, what is wrong with that?

I have to disagree with Oleg on 80% inflation of the Finnish kill numbers. Assuming there is same amount of exaggeration of the numbers in all air arms, the Brewster’s success still is nothing short of amazing.
On the same token, Grendel, I do not believe that 80% of the kills have been verified from Russian archives. Mr C-F Geust has done a great job on studying the Russian archives and comparing them to the Finnsh claims. I haven’t spoken to him for a long time, but I wish he would contribute here and give his educated opinion on this subject. On the other hand, he may not want to do it until the last ace has passed on to the next squadron…
As for JägerMarty’s claim for Finns having had a well trained air force compared to Russia, well, maybe, but in the beginning of the war at least the Germans did not have any part of its training. I remember the late head of CAA Finland K.J. Temmes, ex MS.406 pilot himself, once saying that in the war between Russia and Finland there were two bad Air Forces against each other. I am afraid he may have been right, considering the lack of equipment and funds in Finland especially just before the war. But the motivation of Finns was probably far superior to that of Russians.
I am sure there were lots of inflated victory claims in all aerial combat units, some of which are kept alive by well intended, and often well-written biographies, memoirs and novels. There is a legend of the last flight of one of the top-scoring Finnish aces which has been repeated in a great number of books about aerial war in Finland, a great read, but it bears no resemblance of the description of the flight that can be found in the official war archives in Helsinki. But again, this subject is obviously so sensitive that no aviation historian has dared to publish the facts. Neither dare I here. Grendel, maybe you will? Or wait another 15 years..?

The VL Humu was a Brewster 239 produced in Finland by Valtion Lentokonetehdas (State Aircraft Factory). Essentially a Buffalo with wooden wing and a captured Russian M-63 engine. Only the prototype was built before the end of the war. This still remains preserved in mint condition at the Finnish AF museum at Tikkakoski, next to Jyväskylä airport in Central Finland.
A photo can be seen among the other Buffalo pictures, it’s the one with serial HM-671.

In the Finnsih AF at least the following victories were scored with biplanes:
W/O Oiva Tuominen 6 1/2 with Gladiator (2 I-16, 3 1/2 SB-2, 1 R-5) out of a total of 44 kills.
Lt Olavi Puro 2 with I-153 (1 I-153, 1 Pe-2) out of 36 total.
Capt Paavo Berg 5 with Gladiator (2 I-153, 3 SB-2) out of 9 1/2 total.
w/O Valio Porvari 1 with Bristol Bulldog (!!) (I-16) and 2 with Gladiator (1 DB-3 and 1 I-16) out of 7 1/2 total.
W/O Lauri Lautamäki 1 1/2 with Gladiator (1/2 SB-2 and 1 I-16) out of 5 1/2 total.
These are confirmed kills by Finnish aces (with 5 or more total victories), there may be other biplane victories by pilots with a total of less than 5 kills.
BTW, in the photo above of the Finnish I-153 with number 5 on rudder stands Senior Sgt Matti Durchmann, who scored a total of 6 kills, all with Bf-109.

Pitts Samson.