UE4 - How to gradually increase the speed of the default flying ship?

Hi, I have been trying to increase the speed from the default flying ship in UE, using FInterp to Constant, I just get my Input Axis Move Froward value, multiply it by 100, connect it to FInterp to Constant as a target, input get world delta seconds as delta time and edit the Interp Speed…BUT, all it does is reduce my speed and that’s it, there is no change, I want the ship to go from ultra low to regular speed in 5 seconds, but I cant.

Please help.

Can you show the code?

fly_acceleration.png

Target is my regular speed (input axis move forward), value: 70

It moves the flying ship very slow… there is no gradual change