The French-built SR305-230 is currently flying in several testbed aircraft, including a Cessna 182, Maule MX-9, and Piper Arrow. SMA expects to have STC approval for installation in the Cessna by fall. Including engine, prop, new cowling, engine mount and instruments, the update will sell for $77,000. SMA predicts traditional Skylane speeds on just 9 gallons per hour of Jet A. Current TBO is 2000 hours, but the company plans to expand that to 3000 hours with a predicted overhaul cost of $20,000 to $25,000. What’s more, SMA is developing a higher-horsepower of the same engine–without changing the displacement or number of cylinders–to produce 310 horsepower at 2400 engine rpm. The 230-hp version tops out at 2200 rpm.
SMA: Plans For SR305 Diesel
Key Takeaways:
- SMA's SR305-230 diesel engine is currently undergoing testing in aircraft like the Cessna 182, with STC approval for the Cessna expected by fall.
- The $77,000 update package provides traditional Skylane speeds on 9 GPH Jet A, featuring a 2000-hour TBO (expandable to 3000 hours) and an overhaul cost of $20,000-$25,000.
- SMA is developing a higher-horsepower 310-hp version of the same engine, without changing its displacement or cylinder count.
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