The RP-4, dual supercharged big blocks, dual props - contra rotating variable pitch props

built by Eric Hereth, master machinist, fabricator and welder, built all components of this remarkable aircraft from scratch, with the exceptions of engine long blocks, wheels, and hydraulic components. Jerry Baer assisted in all phases of construction. The RP-4 is the brainchild of David Rose

Found on http://alternateissues.tumblr.com/ but for any information, see http://www.coonfield.net/blog/2007/06/tomorrow-record-breaker-rp4.htm