Newps wrote:


To make matters worser, I can't build one so I have to take someone
else's work. but the numbers of successful Cozys is a testament to
the design. plus, you get to install a rotary-Wankel; this is good?


How can a Wankel be good? Terrible fuel economy.

A turbocharged rotary engine runs about 0.50- 0.55 Lbs/hp/hr BSFC
A normally aspirated rotary engine runs about 0.45-0.50 lbs/hp/hr BSFC

An air cooled lycoming runs 0.40-0.45 lbs/hp/hr BSFC when run LEAN OF PEAK.

The rotary can use auto gas (including ethanol as an oxygenate) as well
as the blue 100LL. The lycoming for the most part can only use 100LL,
unless in experimental, or you can guarantee the mogas is alcohol free.

The rotary is SLIGHTLY less fuel efficient than a normally aspirated
lycoming engine when the lyc is tuned properly and run LOP. Being able
to use car gas in a rotary obliterates any cost penalty on that marginal
fuel economy issue.

Cost per mile is cheaper in the rotary. And it can be rebuilt for less
than the cost of ONE new lycoming jug, or replaced for the cost of 3 new
jugs.

Do the math yourself and you will see.

Not so terrible now, is it?
Dave