Originally Posted by
Pilot DAR
The non power producing half is not decoupled, so it does consume power from the running half. It is simply that other than common crankshaft and gearbox, no part of the engine depends upon the other half to continue running. The remaining 43% power with one half shut down was enough for even a gentle climb if needed. The older Cadillac system did actually hold open valves to decouple certain cylinders for efficiency, but that involved yet another "system". I'm very content with the duality which RED has designed in, it does what [hopefully you don't] need, better than any other single engine!
A highly interesting development!
Is the I/O Fuel Pump still pumping fuel around, or shut/off from fuel and mechanically decoupled?
- If range or endurance maximisation were desired, would shutting down one half help extend range/endurance by running the other half at a more efficient power setting at lower airspeed, or is the still compressing Dead Half taking away too much power from the Live Half to leave an advantage?
- And is there a time limitation for flying with a Dead Half? Is OHI for emergency only, or an operational option, are shut-downs/restarts allowed for pilot training?
Thanks for any further insights (just curious)
jr