"On-Condition" wrote in message
news:MMMUe.167883$wr.92445@clgrps12...

Just wondering, exactly why are radial diesels not part of the
diesel revival? You can't beat radials on airplanes for smooth
reliability. I once saw a cracked-off jug pounding through the
cowling as the engine was still running (the single Otter had
just landed).

Because there are no airframes currently in production that are designed for
radials. With other engine configurations, it is possible that the new
diesel(s) might be fitted to current airframes, either for new production or
for retrofits.