RE: Viggen
The was a Swedish guy called Ohlsen that used to make them in different sizes. Jim Fox here in the UK made a small one of these as a 90 size DF kit back in the 80's. They were very popular and I had a couple. Great flying plane. I heard some one had taken over the Ohsen kit range. Anyone know?
You would just have to do the reverse thrust[8D]
I saw one of these demonstrated in the late 80's. It was there as a farewell to the English Electric Lightning, and it was almost as impressive. But a Lightning could not taxi backwards.