The Seawind is a unique Sea Plane that first flew in 1982 and was offered as a kit plane up to 2002. Direction shifted to a certified version but the 2008 recession ultimately took it out with actual efforts ending a few years later
The original Seawind 2000 had a 200 hp IO-360 followed up with the 3000 that had a 300 HP engine. Over 80 kits where shipped and they do show up on the used market.
Despite it’s high mounted engine power vs pitch dynamics seemed to be manageable.
Wiki has quite a good overview of the history: https://en.wikipedia.org/wiki/Seawind_International_Seawind
A quick google search found the super sea wind web page for N71RJ a Seawind that is powered by a PT6
https://generalaviationnews.com/2016/04/26/building-a-super-seawind-from-arms-to-wings/
Living in Florida and being around the LoPresti operations at KVRB I found out LeRoy designed a seaplane called the Spectra that had its first flight in 1969 that appears to be the genesis of this kind of vertical stab mounted engine sea plane. I’m sure the Seawind designer(s) where aware of the Spectra and where influenced by it.
https://en.wikipedia.org/wiki/Island_X-199_Spectra
Quite a few videos on YouTube;
Lots of RC options as well:
For RC options:
Tower Hobbies offers a 1.4M Seawind
https://www.towerhobbies.com/product/seawind-1.4m-pnp/TOWA1575.html
Flyzone also offered a an option:
https://www.modelaviation.com/flyzone-seawind
two other RC sea plane designs have a similar vertical stab mounted engine setup:
1 The Spectra mentioned Earlier:
https://outerzone.co.uk/plan_details.asp?ID=9154
2. The Northstar designed by Laddie Mikulasko in the March 1986 issue of RCM as plans:
https://outerzone.co.uk/plan_details.asp?ID=10325
Balsa USA has continuously offered a kit for the Northstar that’s still available.
I built one back in the 1990’s and it flew fairly well: https://balsausa.com/products/northstar?srsltid=AfmBOopjFQAEr7TWaSCdZgN37gC06TKxePNcTOZGayMkhsPRindB8W9U
There has been quite a few all foam / ARF based versions inspired by the Northstar that have come out in the years after the electric aircraft revolution of the mid 2000’s
Gould Aero 