1.03 Aircrafts can't be created

[gornik]

V 1.03 
1900
Russia
Varied techs, 90% research
New plane types can't be requested after researches are done. Last example: Diving bombing tech has been researched, but when I try to request diving bomber, message appeared, that "role for aircraft is not known". That happen before with other types (I built several AV before first floatplane appeared, as example), seem that only"private venture" event may open type. 
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PS: Anyway, thanks for this great game!!!

[kallek]

I have reported the same issue

[gornik]

Sorry, didn't find your report via search.

Some new observations of bug:
After some years of failing DB request, I've suddenly got the ability of do it (in 1940). But nobody can create such plane (without any error messages). Then I again got messages about "role for aircraft is not known". Then (in 1941) I've bought diving bomber design from USA and now can request the new design myself.

In other game I was behind leaders in air research, and was able to request roles that were known to others. But torpedo bombers are still unavailable, maybe as nobody else research them ("Enables air launched torpedoes" tech is open, of course). 

[mqrt]

Hello,
I have the same issue atm.
1900 game.
standar and Improved air launch torps researched, but cannot request Torp bombers.
No other nation has them either, so wonder if this is a bug or a feature?
Could it be related to the varied tech option?

regards,
M

ps. Thx for the great game!

[Fredrik W]

It could very possibly be varied tech. Could you post a save?

[gornik]

I rewrote this save, unfortunately. The one kallek post here reproduce the same issue:
nws-online.proboards.com/thread/2711/bug-aircraft-roles-tech-regression

Yes, it seem to be varied tech problem. Now I'm playing new game without it (all other options are the same) and just became the first torpedo plane owner, starting research just after tech opened.