I have been considering the idea of an extreme STOL homebuilt. This is my plan:
Start with a conventional light or ultralight airplane and add one or more lift fans to provide direct powered lift. This powered lift system would only be needed briefly for takeoff and landing just a few feet above the ground.
Start with a small amount of lift, then gradually add more lift fans for extreme STOL. Then with enough lift eventually VTOL might be possible but start with STOL first.
Any ideas for powered lift fans that could be used for brief thrust of a few seconds?
Stored energy was suggested in a previous thread. JATO works, but is not practical for a civilian, I think.
Any other thoughts appreciated.