Tim, Paul and all,
Here is a photo of a Mazda powered BD-5 in the Western Aerospace
Museum, Oakland, CA.
265 (or 285?) hp, they were never able to solve the  cooling problems.
There is a rotary (Norton)
powered BD-5 in the US and another one in the UK. Alturair of San
Diego, CA has tried to develop
a single rotor rotary with aluminum castings but, to date, I don't
think they have been successful.
With recent news of manufacturing rotary engines (in Ohio I believe)
the chance to power a BD-5
with a rotary of the proper size and weight may become possible, I
certainly hope so.
Cheers,
John Lewis
N501BD

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