Hello,
i remember another thread where something like this have been solved by using " get forward vector." Maybe it will work for you too.
Edit : like in this example for a line trace from : https://docs.unrealengine.com/latest/INT/Gameplay/HowTo/UseRaycasts/Blueprints/index.html
https://docs.unrealengine.com/latest/images/Gameplay/HowTo/UseRaycasts/Blueprints/GHT2B_6.jpg