When taking off keep the brake on until the propellers change from individual blades to spinning blurs then release the brakes. Begin to pull up once the plane hits around 32 m/s and it should fly well.
I also made a bomber version. You can find the download file in the "Files" section.
Mods needed:
Airplane Plus: https://mods.curse.com/ksp-mods/kerbal/245311-airplane-plus#t1:other-downloads
Optional Mods:
BD Armory: https://mods.curse.com/ksp-mods/kerbal/248173-bdarmorycontinued#t1:other-downloads
(The download for 1.2 should work with 1.2.2)